MI 611-206

Instruction

June 2011873 and 875 Series Analyzers,
870IT and 876 Series Transmitters,
871, PH10 and ORP10 Series Sensors
Intrinsic Safety Connector Diagrams andNonincendive Circuits

MI 611-206 – June 2011

Contents
1. 875 Analyzers .................................................................................................................... 1
FM Entity Approval, 875 Analyzers, Nonincendive .................................................................. 1
FM Approved 875 Analyzers With Nonincendive Field Wiring ................................................ 2
Nonincendive Field Wiring Circuit Concept ........................................................................ 3
Analyzer Installed In Non-Hazardous Area With Sensor Installed In The Division 2 Area ... 3
Analyzer and Sensor Installed in Division 2 Area .................................................................. 3
Nonincendive Sensor ............................................................................................................ 3
FM Definition of Simple Apparatus: .................................................................................... 3875 Panel-Mounted Analyzer ............................................................................................... 4
FM Approvals Listing ........................................................................................................... 4
CSA Loop Certified Nonincendive Circuit ............................................................................... 5
IECEx Entity Approval, 875 Analyzers, Type n ........................................................................ 6
Analyzer Identification ......................................................................................................... 6
Hazardous Location Code .................................................................................................... 7
Field Mounted Enclosures .................................................................................................... 9
Panel-Mounted Enclosures ................................................................................................... 9Electrical Connection Warning ............................................................................................ 9
Grounding Warning ............................................................................................................. 9
Origin Code ....................................................................................................................... 10
Supply Voltage Operative Limits ........................................................................................ 10
Alarm Contact Limits ......................................................................................................... 10
Ambient Temperature Limits ............................................................................................. 10
Installation Instructions ...................................................................................................... 10
CE Compliance .................................................................................................................. 10
2. 870IT Transmitters......................................................................................................... 11
FM Entity Approval, Intrinsic Safety ....................................................................................... 11
FM Loop Approval, Intrinsic Safety ........................................................................................ 12
FM Loop Approval Nonincendive Circuit .............................................................................. 13
CSA Loop Certified Intrinsic Safety ........................................................................................ 14
CSA Loop Certified Nonincendive Circuit ............................................................................. 16
3. 873 and 873A Analyzers .................................................................................................. 17
FM Loop Approval Nonincendive Circuit .............................................................................. 17
CSA Loop Certified Nonincendive Circuit ............................................................................. 18
4. pH, ORP, and ISE Sensors.............................................................................................. 19
FM Entity Approval, pH, ORP, and ISE Sensors, Intrinsically Safe and Nonincendive .......... 19
Intrinsically Safe Field Wiring Circuit Concept .................................................................. 20
Nonincendive Field Wiring Circuit Concept ...................................................................... 20

iii

MI 611-206 – June 2011

Contents

Associated Apparatus in Non-hazardous Area;
Sensor in Hazardous Area ................................................................................................... 20
Associated Apparatus and Sensor in Hazardous Area .......................................................... 21
Entity and Field Wiring Parameters ................................................................................... 22
Pin Terminated Integral Cable Connections ...................................................................... 23
Patch Cable Connections ................................................................................................... 24
FM Approvals Listing ......................................................................................................... 26
IECEx Entity Approval, 871PH, 871A, PH10, and ORP10 Sensors, Type ia and Type n ...... 28
Associated Apparatus in Non-hazardous Area,
Sensor in Hazardous Area ................................................................................................... 29
Associated Apparatus and Sensor in Hazardous Area .......................................................... 30
871PH ............................................................................................................................... 31
871A .................................................................................................................................. 35
PH10 and ORP10 .............................................................................................................. 38
5. Electrodeless Conductivity Sensors.................................................................................. 41
FM Entity Approval, FT10 Noninvasive Nonmetallic Electrodeless Conductivity Sensors, Intrinsically
Safe and Nonincendive ........................................................................................................... 41
Intrinsically Safe Field Wiring Circuit Concept .................................................................. 42
Nonincendive Field Wiring Circuit Concept ...................................................................... 42
Associated Apparatus in Non-hazardous Area;
Sensor in Hazardous Area ................................................................................................... 42
Associated Apparatus and Sensor in Hazardous Area .......................................................... 43
Entity and Field Wiring Parameters ................................................................................... 44
Pin Terminated Integral Cable and Patch Cable Connections ............................................ 44
Patch Cable Connector ...................................................................................................... 45
FM Approvals Listing ......................................................................................................... 46
IECEx Entity Approval, FT10 Noninvasive Nonmetallic Electrodeless Conductivity Sensor, Type ia
and Type n .............................................................................................................................. 48
Sensor Identification .......................................................................................................... 49
Associated Apparatus in Non-hazardous Area,
Sensor in Hazardous Area ................................................................................................... 50
Associated Apparatus and Sensor in Hazardous Area .......................................................... 51
Entity and Field Wiring Parameters ................................................................................... 52
Pin Terminated Integral Cable and Patch Cable Connections ............................................ 52
Patch Cable Connector ...................................................................................................... 53
Special Conditions of use ................................................................................................... 54
6. 876 Transmitters............................................................................................................. 57
FM Entity Approval ................................................................................................................ 57
CSA Entity Approval .............................................................................................................. 60
IECEx Entity Approval ........................................................................................................... 63
Transmitter Identification .................................................................................................. 64
Electrical Certification Rating ................................................................................................. 65
Origin Code ............................................................................................................................ 67
Special Warnings ..................................................................................................................... 67iv

1. 875 Analyzers
FM Entity Approval, 875 Analyzers, Nonincendive
NON-HAZARDOUS LOCATIONHAZARDOUS LOCATION
CLASS I, DIVISION 2, GROUPS A, B, C, D
CLASS II, DIVISION 2, GROUPS F, G
CLASS III, DIVISION 2NONINCENDIVEFM ENTITY APPROVED
875 ANALYZER

FM APPROVEDSENSOR
OR SIMPLE APPARATUS

Figure 1. Analyzer in Non-hazardous Location

HAZARDOUS LOCATIONNON-HAZARDOUS
LOCATION

CLASS I, DIVISION 2, GROUPS A, B, C, D
CLASS II, DIVISION 2, GROUPS F, G
CLASS III, DIVISION 2NONINCENDIVEFM ENTITY APPROVED
875 ANALYZER

FM APPROVEDSENSOR
OR SIMPLE APPARATUS

Figure 2. Analyzer in Hazardous Location1

MI 611-206 – June 2011

1. 875 Analyzers

45
RTD (CABLE
LENGTH COMP)

3

ATC DRIVESHIELDINNER
ELECTRODE

ATC RETURN

1OUTERELECTRODE

2A

1
OUTER
ELECTRODE

2

2

CHANNEL CH 2

INNER
ELECTRODE2A
SHIELD

3
ATC RETURN

ATC DRIVE

RTD (CABLE
LENGTH COMP)

5ENTITY PARAMETERS
Vt = 5 V
It = 82.45 mA
Po = 103.1 mW
Ca = 10000 F
La = 8.5 mH

4CHANNEL CH 1

8
RTD 3-WIRE(ORN)7
RTD DRIVE
(BLU)

6

4
SENSOR RETURN(RED)

RTD RETURN(BRN)

3
SENSOR SCREEN(SHIELD) (CLEAR)

5

2
SENSOR DRIVE(WHT)SENSOR RETURN(CLEAR)

1
ENTITY PARAMETERS
Vt = 5 V
It = 90.3 mA
Po = 112.88 mW
Ca = 10000 F
La = 8 mH

SENSOR DRIVE(BLK)

Figure 3. 875CR Analyzer Entity Parameters and Connections

5A

6

7

8

G

SENSOR POWER +SENSOR POWER –DIAGNOSTICNOT USED

5
REFERENCEELECTRODE

REF. ELECTRODE
SCREEN (SHIELD)

4SOLUTION EARTH(GROUND)

3A
MEAS SCREEN(SHIELD)2A
RTD 3-WIRE

MEAS ELECTRODE

2
RTD DRIVE

31

ENTITY PARAMETERS
Vt = 10 V
It = 47.64 mA
Po = 119.1 mW
Ca = 12.5 F
La = 25 mH

RTD RETURN

Figure 4. 875EC Analyzer Entity Parameters and Connections

Figure 5. 875PH Analyzer Entity Parameters and Connections

FM Approved 875 Analyzers With Nonincendive Field
Wiring
The sensor interface of the 875 Analyzers is FM Approved as nonincendive for use in Division 2
hazardous (classified) areas. The analyzers can be installed in a non-hazardous area with the sensor
in a hazardous area or the analyzer and sensor can be installed in a hazardous area. Wiring andinstallation methods are determined by the area in which the 875 Analyzer is installed. In all cases,
installation should be in accordance with the National Electric Code (ANSI/NFPA 70) and any
applicable local code requirements.

2

1. 875 Analyzers

MI 611-206 – June 2011

! WARNING
Explosion Hazard - Do not disconnect equipment when a flammable or combustible
atmosphere is present unless power has been switched off.

Nonincendive Field Wiring Circuit Concept
The nonincendive field wiring circuit concept allows interconnection of nonincendive apparatus
with associated nonincendive apparatus not specifically examined in combination as a system
when:
Vmax or Ui  Voc, Vt or Uo; Ca = Ci + Ccable; La  Li + Lcable! CAUTION
The associated apparatus manufacturer's installation drawing must be followed when
installing this equipment.

Analyzer Installed In Non-Hazardous Area With Sensor
Installed In The Division 2 Area
There are no special requirements when the 875 Analyzer is installed in a non-hazardous location.
See Figure 1.

Analyzer and Sensor Installed in Division 2 Area
All connections to the analyzer must be protected by conduit to prevent damage to the wiring in
the hazardous area except the connections to the sensor do not need to be protected by conduit.
Conduit and all fittings to the 875 Analyzer housing including the sensor cable fitting must meet
ingress protection ratings of Type 4X and IP66 within the hazardous area. See Figure 2.

Nonincendive Sensor
The sensor must either be an FM Approved Nonincendive Apparatus with compatible entity
parameters, be in the table of loop-approved 875 Analyzer and Sensor systems or be considered asimple apparatus. Refer to Sensor Terminal Block diagrams in Figures 3 through 5 for a listing ofEntity Parameters for each of the 875 Analyzer models. Refer to the definition of Simple.
Apparatus below.

FM Definition of Simple Apparatus:
An electrical component or combination of components of simple construction with well definedelectrical parameters that does not generate more than 1.5 V, 100 mA, and 25 mW or a passive
component that does not dissipate more than 11.3 W and is compatible with the intrinsic safetyof the circuit in which it is used.

3

MI 611-206 – June 2011

1. 875 Analyzers

875 Panel-Mounted Analyzer
The panel mounted 875 Analyzer provides a Type 4X or IP66 Ingress Protection rating whenused in conjunction with the Foxboro provided Mounting Kit and a user-supplied FM approved
enclosure.
NOTE

No revision is allowed to this 875 Series Analyzer Nonincendive Installation
Instruction (FM Control Drawing) without prior FM approval.

FM Approvals Listing
875a-bcF-d Intelligent Electrochemical Analyzer
NI/I/2/ABCD/T4A Ta=75 °C-MI 611-206; NIFW; S/II/2/FG/T4A Ta=75 °C-MI 611-206;
NIFW; S/III/2/T4A Ta=75 °C-MI 611-206; NIFW; Type 4X, 3S, IP66

Nonincendive Field Wiring Parameters:
When a = CR:
Vt = 5 V, It = 82.45 mA, Po = 103.10 mW, C = 10,000 F, L = 8.5 mH
When a = EC:
Vt = 5 V, I = 90.30 mA, Po = 112.88 mW, Ca = 10,000 F, La = 8.0 mH
When a = PH:
Vt = 10 V, It = 47.64 mA, Po = 119.10 mW, Ca = 12.5 F, La = 25.0 mH
a = Type: CR, EC or PH
b = Supply Voltage: A, B, C, D, E or J
c = Mounting: 1, 2, 3 or 4
d = Options: A, C, F, N or P

Special Conditions of Use
1. The Model 875a-b1F-d front panel analyzer shall be installed in compliance with the enclosure
mounting, spacing and segregation requirements of the ultimate application.
2. The Model 875a-b1F-d front panel analyzer has been tested for Class II/III, IP66 and Type 4X
only. To maintain these ratings, the Model 875a-b1F-d shall be mounted in an enclosure, which
has been tested and found to have met these ratings.

4

1. 875 Analyzers

MI 611-206 – June 2011

CSA Loop Certified Nonincendive Circuit
Ordinary Locations and Class I, Division 2,
Groups A, B, C, D Hazardous Locations
875PH Series Electrochemical Analyzers

875EC Series Electrochemical Analyzers
875CR Series Electrochemical Analyzers

Ordinary Locations and Class I, Division 2,
Groups A, B, C, D Hazardous Locations
871PH Series Sensors
871A Series Sensors
PH10 Series Sensors
ORP10 Series Sensors
871EC Series Sensors
871FT Series Sensors
871CC Series Sensors
871CR Series Sensors

Maximum cable length of certified 871EC or 871FT: 100 ft; 871PH, 871A, PH10, ORP10, 871CC, or
871CR: 500 ft.

! WARNING
Explosion Hazard - Substitution of components may impair suitability for Class I,
Division 2. Do not disconnect equipment unless power has been switched off or thearea is known to be non-hazardous.
TIP

Risque D’explosion - La substitution de composants peut rendre ce materielinacceptable pour les emplacements de Classe I, Division 2. Avant de deconnecter
l’equipement couper le courant ou s’assurer que l’emplacement est designe nondangereux.
! WARNING
Wiring method must be in accordance with the Canadian Electrical Code, Part I.

5

MI 611-206 – June 2011

1. 875 Analyzers

IECEx Entity Approval, 875 Analyzers, Type n
HAZARDOUS LOCATIONNON-HAZARDOUS LOCATIONZONE 2, GROUP IIC, TYPE n

IECEx ENTITY APPROVED
875 ANALYZER

IECEx APPROVEDSENSOR

Figure 6. Analyzer in Non-hazardous Location

NON-HAZARDOUS
LOCATION

HAZARDOUS LOCATIONZONE 2, GROUP IIC, TYPE n

IECEx ENTITY APPROVED
875 ANALYZER

IECEx APPROVEDSENSOR

Figure 7. Analyzer in Hazardous Location

Analyzer Identification
On panel-mounted analyzers, a data label and agency label are fastened to the top surface of theenclosure. On surface- or pipe-mounted devices, the data label is located on the right side and theagency label (if applicable) on the left side of the analyzer. A third label containing user
information is also on the analyzer. A typical data label is shown in Figure 8. A typical agency
label is shown in Figure 9.

6

1. 875 Analyzers

MI 611-206 – June 2011

Refer to the data label to determine the model, origin code, supply voltage, maximum power,
maximum VA, and alarm contact ratings.

875PH-A2D-A

MODEL

2B0125DATE AND PLANT OF MANUFACTURE
SUPPLY VOLTAGE
MAXIMUM POWER

120 VAC

POWER CONSUMPTION
5 A @ 160 V AC
ALARM CONTACT RATINGS

Figure 8. Sample 875 Analyzer Data Label

Figure 9. Sample 875 Analyzer Agency Label

Hazardous Location CodeThe electrical safety design code is printed on the data label as part of the model number. See
Figure 8. The location of the code within the model number is shown below:
875PH-A2D-A
ELECTRICAL SAFETY DESIGN CODE

See Table 1 to identify this code. The type of protection is also located on the agency label. See
Figure 9.
7

MI 611-206 – June 2011

1. 875 Analyzers

Table 1. Product Safety Specifications
Testing Laboratory,
Types of Protection, and Area Classification
IECEx protection ‘n’ for Zone 2;
Ex nA nL nC [nL] IIC. (a)Electrical
SafetyDesign CodeApplication Conditions
Temperature Class T4 at maximum
ambient temperature of 60 °C(140 °F). See certificate IECEx FMG
06.0001 X

D(a)The L means that the unit contains energy limited circuits to the sensor.

NOTE

These analyzers have been designed to meet the electrical safety descriptions listed
in the table above. For detailed information, or status of testing laboratory
approvals/certifications, contact Invensys.

1

2

3

4

5

6

7

8

SENSOR DRIVE(WHT)SENSOR SCREEN(SHIELD) (CLEAR)SENSOR RETURN(RED)SENSOR RETURN(CLEAR)

RTD RETURN(BRN)

RTD DRIVE(BLU)

RTD 3-WIRE(ORN)

ENTITY PARAMETERS
Vt = 5 V
It = 90.3 mA
Po = 112.88 mW
Ca = 10000 F
La = 8 mH

SENSOR DRIVE(BLK)

Figure 10. 875CR Analyzer Entity Parameters and Connections

Figure 11. 875EC Analyzer Entity Parameters and Connections

8

3

4

5

ATC RETURN

ATC DRIVE

RTD (CABLE
LENGTH COMP)INNER
ELECTRODE

2A

1
OUTER
ELECTRODESHIELD

1
OUTER
ELECTRODE

2

2

CHANNEL CH 2

INNER
ELECTRODE2A
SHIELD

3
ATC RETURN

ATC DRIVE

RTD (CABLE
LENGTH COMP)

5ENTITY PARAMETERS
Vt = 5 V
It = 82.45 mA
Po = 103.1 mW
Ca = 10000 F
La = 8.5 mH

4CHANNEL CH 1

5A

6

7

8

G

SENSOR POWER +SENSOR POWER –DIAGNOSTICNOT USED

5
REFERENCEELECTRODE

REF. ELECTRODE
SCREEN (SHIELD)

4SOLUTION EARTH(GROUND)

3A
MEAS SCREEN(SHIELD)3

2A
RTD 3-WIRE

MEAS ELECTRODE

2
RTD DRIVEENTITY PARAMETERS
Vt = 10 V
It = 47.64 mA
Po = 119.1 mW
Ca = 12.5 F
La = 25 mH

1

MI 611-206 – June 2011

RTD RETURN

1. 875 Analyzers

Figure 12. 875PH Analyzer Entity Parameters and Connections

Field Mounted Enclosures
IEC certified field mounted units provide an ingress protection rating of up to IP66. All fittings
used for the installation must meet the minimum protection rating required for a particularinstallation.

Panel-Mounted Enclosures! WARNING
IEC certified panel-mounted units must be installed in an enclosed panel or rack
whose degree of ingress protection must be at least IP54 in accordance with
EN 60529 and comply with clause 6 of EN 60079.15.
All fittings used for the installation must meet the minimum protection rating
required for a particular installation.
Refer to the Electrical Connection Warning immediately below.

Electrical Connection Warning! WARNING
1. For IEC certified analyzers, electrical connections must be made in such a way thatthe degree of ingress protection of the enclosure remains at least IP54 per EN 60529
and is suitable for the environment.
2. Wiring must comply with local codes for the country of installation.

Grounding Warning! WARNING
The grounding stud or conductive mounting means of the enclosure must beconnected to the potential equalizing system within the explosive atmosphere.

9

MI 611-206 – June 2011

1. 875 Analyzers

Origin CodeThe origin code identifies the area of manufacture and the year and week of manufacture. See
Figure 8. In the example, 2B means the product was manufactured in the Analytical Division,
01 identifies the year of manufacture as 2001, and 25, the week of manufacture in that year.

Supply Voltage Operative Limits
The supply voltage operative limits are the voltage shown on the data label +15% and -20%. See
Figure 8.

Alarm Contact Limits
The alarm contact limits are shown on the data label. See Figure 8. The standard limits are 5 A at
250 V ac and 2 A at 30 V dc. The IEC limits are 5 A at 160 V ac and 2 A at 30 V dc.

Ambient Temperature Limits
The ambient temperature operative limits of the analyzer are -20 and +75 °C (-4 and +165 °F).
For analyzers with IEC certification, the limits are -20 and +60 °C (-4 and +140 °F).

Installation Instructions
Refer to MI 611-222 (875CR), MI 611-224 (875EC), or MI 611-225 (875PH)

CE Compliance
For the 875 panel mounted analyzer to meet CE requirements, a grounded metal enclosure isrequired. To assure a good ground, the edges of the panel opening that receives the analyzer mustnot be painted.

10

2. 870IT Transmitters
FM Entity Approval, Intrinsic Safety
NON-HAZARDOUS LOCATIONHAZARDOUS LOCATION
CLASS I, DIVISION 1, GROUPS A, B, C, D
CLASS II, DIVISION 1, GROUPS E, F, G
CLASS III, DIVISION 1
INTRINSICALLY SAFEFM ENTITY APPROVEDAPPARATUSORBARRIER

870IT SERIES
TRANSMITTERENTITY PARAMETERS
Vmax = 36.1 V
I max = 110 mA
Ci = 3nF
Li = 9.9 H
NOTES
1.

BARRIER MUST BE INSTALLED IN AN ENCLOSURE THAT MEETS THE REQUIREMENTS OF
ANSI/ISA S82.01.

2.

RESISTANCE BETWEEN INTRINSICALLY SAFE GROUND AND EARTH GROUND MUST BE LESS THAN
1 OHM.

3.

CONTROL EQUIPMENT CONNECTED TO BARRIER MUST NOT USE OR GENERATE MORE THAN 250 Vrms
OR V dc.1

4.

INSTALLATION SHOULD BE IN ACCORDANCE WITH ANSI/ISA RP 12.6 “INSTALLATION OF INTRINSICALLYSAFE SYSTEMS FOR HAZARDOUS (CLASSIFIED) LOCATIONS”, ANSI/NFPA 70 “NATIONAL ELECTRICAL
CODE”, THE BARRIER MANUFACTURER’S INSTALLATION REQUIREMENTS.

5.

AN APPROVED DUST-TIGHT SEAL IS REQUIRED FOR CLASS II AND III APPLICATIONS.

6.

870IT SERIES TRANSMITTERS ENTITY PARAMETERS BASED UPON CONNECTION TO SENSORS LISTEDBELOW. MAXIMUM CABLE LENGTH OF APPROVED 871EC OR 871FT: 100 FT; 871PH, 871A, PH10, ORP10,871CC, OR 871CR: 500 FT.

870ITPH Series Electrochemical Transmitters

870ITEC Series Electrochemical Transmitters
870ITCR Series Electrochemical Transmitters

871PH Series Sensors
871A Series Sensors
PH10 Sensors
ORP10 Sensors
871EC Series Sensors
871FT Series Sensors
871CC Series Sensors
871CR Series Sensors

1. 870IT Series Transmitters generate less than 250 Vrms or V dc.
11

MI 611-206 – June 2011

2. 870IT Transmitters

FM Loop Approval, Intrinsic Safety
NON-HAZARDOUS LOCATIONHAZARDOUS LOCATION
CLASS I, DIVISION 1, GROUPS A, B, C, D
CLASS II, DIVISION 1, GROUPS E, F, G
INTRINSICALLY SAFEFMAPPROVEDAPPARATUS

SPEC 200 SYSTEM
2AI-I2V-FGB
2AI-I3V-FGB
2AS-I2I-FGB
2AS-I3I-FGB
2AS-I3I-FGB-VLA

870IT SERIES
TRANSMITTER

870IT SERIES ELECTROCHEMICAL TRANSMITTER*UIO AND UCM SUBSYSTEM
3A2-I2D
3A2-I3D
3A4-I2DA
3AD-I3IA-C
3AS-I2IA-C
3AS-I3I
FIO SYSTEM
3F4-I2DIA*870IT SERIES TRANSMITTERS ENTITY PARAMETERS BASED UPON CONNECTION TO SENSORS LISTED BELOW.
MAXIMUM CABLE LENGTH OF APPROVED 871EC OR 871FT: 100 FT; 871PH, 871A, PH10, ORP10, 871CC,
OR 871CR: 500 FT.

870ITPH Series Electrochemical Transmitters

870ITEC Series Electrochemical Transmitters
870ITCR Series Electrochemical Transmitters

12871PH Series Sensors
871A Series Sensors
PH10 Sensors
ORP10 Sensors
871EC Series Sensors
871FT Series Sensors
871CC Series Sensors
871CR Series Sensors

2. 870IT Transmitters

MI 611-206 – June 2011

FM Loop Approval Nonincendive Circuit
Ordinary Location and Class I, II, and III,
Division 2, Groups A, B, C, D, F, and G
Hazardous Locations
870ITPH Series Electrochemical Transmitters

870ITEC Series Electrochemical Transmitters
870ITCR Series Electrochemical Transmitters

Ordinary Location and Class I, II, and III,
Division 2, Groups A, B, C, D, F, and G
Hazardous Locations
871PH Series Sensors
871A Series Sensors
PH10 Series Sensors
ORP10 Series Sensors
871EC Series Sensors
871FT Series Sensors
871CC Series Sensors
871CR Series Sensors

Maximum cable length of approved 871EC or 871FT: 100 ft; 871PH, 871A, PH10, ORP10, 871CC, or
871CR: 500 ft.

! WARNING
Explosion Hazard - Substitution of components may impair suitability for Class I,
Division 2. Do not disconnect equipment unless power has been switched off or thearea is known to be non-hazardous.

13

MI 611-206 – June 2011

2. 870IT Transmitters

CSA Loop Certified Intrinsic Safety
NON-HAZARDOUS LOCATIONHAZARDOUS LOCATION
CLASS I, GROUPS A, B, C, D
DIVISION 1 AND 2 HAZARDOUS(CLASSIFIED) LOCATIONSCSACERTIFIEDAPPARATUS

Vmax
28 V
28 V
Diode
28 V
10 V

Rmin
300 
300 
–
300 
50 

870IT SERIES
TRANSMITTER*

Temp.
Class
T3C
T3C
Return
T3C
Return*MAXIMUM CABLE LENGTH OF CERTIFIED 871EC OR 871FT: 100 FT; 871PH, 871A, PH10, ORP10, 871CC, OR 871CR,
500 FT.
1. BARRIERS MUST BE CSA CERTIFIED AND MUST BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURER’SINSTRUCTIONS.
2. CONTROL EQUIPMENT CONNECTED TO THE BARRIER MUST NOT USE OR GENERATE MORE THAN 250 VOLTS.
3. INSTALLATION MUST BE IN ACCORDANCE WITH THE CANADIAN ELECTRICAL CODE, PART 1.
4. RESISTANCE BETWEEN INTRINSICALLY SAFE AND GROUND MUST BE LESS THAN 1 OHM.

14

2. 870IT Transmitters

NON-HAZARDOUS LOCATIONMI 611-206 – June 2011

HAZARDOUS LOCATION
CLASS I, GROUPS A, B, C, D
DIVISION 1 AND 2 HAZARDOUS(CLASSIFIED) LOCATIONSCSACERTIFIEDAPPARATUS

870IT SERIES
TRANSMITTER*

SPEC 200 SYSTEM
2AI-I2V-CGB
2AI-I3V-CGB
2AS-I2I-CGB(CHANNEL A)
2AS-I3I-CGB(CHANNEL A)
UIO AND UCM SUBSYSTEM
3A2-I2D-CGB
3A2-I3D-CGB
3A4-I2DA-CGB(24 V, 62 mA RATING)
3AD-I3IA-CGB(24 V, 62 mA RATING
3AS-I2I-CGB
3AS-I3I-CGBFIO SYSTEM
3F4-I2D1A (24 V, 62mA)*MAXIMUM CABLE LENGTH OF CERTIFIED 871EC OR 871FT: 100 FT; 871PH, 871A, PH10, ORP10, 871CC, OR 871CR,
500 FT.
1. BARRIERS MUST BE CSA CERTIFIED AND MUST BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURER’SINSTRUCTIONS.
2. CONTROL EQUIPMENT CONNECTED TO THE BARRIER MUST NOT USE OR GENERATE MORE THAN 250 VOLTS.
3. INSTALLATION MUST BE IN ACCORDANCE WITH THE CANADIAN ELECTRICAL CODE, PART 1.
4. RESISTANCE BETWEEN INTRINSICALLY SAFE AND GROUND MUST BE LESS THAN 1 OHM.

15

MI 611-206 – June 2011

2. 870IT Transmitters

CSA Loop Certified Nonincendive Circuit
Ordinary Locations and Class I, Division 2,
Groups A, B, C, D Hazardous Locations
870ITPH Series Electrochemical Transmitters
870ITEC Series Electrochemical Transmitters
870ITCR Series Electrochemical Transmitters

Ordinary Locations and Class I, Division 2,
Groups A, B, C, D Hazardous Locations
871PH Series Sensors; 871A Series Sensors
PH10 Series Sensors; ORP10 Series Sensors
871EC Series Sensors
871FT Series Sensors
871CC Series Sensors
871CR Series Sensors

Maximum cable length of certified 871EC or 871FT: 100 ft; 871PH, 871A, PH10, ORP10, 871CC, or
871CR: 500 ft.

! WARNING
Explosion Hazard - Substitution of components may impair suitability for Class I,
Division 2. Do not disconnect equipment unless power has been switched off or thearea is known to be non-hazardous.
TIP

Risque D’explosion - La substitution de composants peut rendre ce materielinacceptable pour les emplacements de Classe I, Division 2. Avant de deconnecter
l’equipement couper le courant ou s’assurer que l’emplacement est designe nondangereux.

Installation and wiring method must be in accordance with the Canadian Electrical Code, Part 1.

16

3. 873 and 873A Analyzers
FM Loop Approval Nonincendive Circuit
Ordinary Location and Class I, II, and III,
Division 2, Groups A, B, C, D, F, and G
Hazardous Locations
873PH Series Electrochemical Analyzer
873APH Series Electrochemical Analyzer

873RS Series Electrochemical Analyzer
873ARS Series Electrochemical Analyzer
873CC Series Electrochemical Analyzer
873ACC Series Electrochemical Analyzer
873EC Series Electrochemical Analyzer
873AEC Series Electrochemical Analyzer
873DPX Series Electrochemical Analyzer

Ordinary Location and Class I, II, and III,
Division 2, Groups A, B, C, D, F, and G
Hazardous Locations
871PH Series Sensors
871A Series Sensors
PH10 Series Sensors
ORP10 Series Sensors
871CC Series Sensors
871CC Series Sensors
871CR Series Sensors
871EC Series Sensors
871FT Series Sensors
871PH Series Sensors
871A Series Sensors
PH10 Series Sensors
ORP10 Series Sensors

Maximum cable length of certified 871EC or 871FT: 100 ft; 871PH, 871A, PH10, ORP10, 871CC, or
871CR: 500 ft.

! WARNING
Explosion Hazard - Substitution of components may impair suitability for Class I,
Division 2. Do not disconnect equipment unless power has been switched off or thearea is known to be non-hazardous.

17

MI 611-206 – June 2011

3. 873 and 873A Analyzers

CSA Loop Certified Nonincendive Circuit
Ordinary Locations and Class I, Division 2,
Groups A, B, C, D Hazardous Locations
873PH Series Electrochemical Analyzer
873APH Series Electrochemical Analyzer
873RS Series Electrochemical Analyzer
873ARS Series Electrochemical Analyzer
873CC Series Electrochemical Analyzer
873ACC Series Electrochemical Analyzer
873EC Series Electrochemical Analyzer
873AEC Series Electrochemical Analyzer
873DO Series Electrochemical Analyzer
873DPX Series Electrochemical Analyzer

Ordinary Locations and Class I, Division 2,
Groups A, B, C, D Hazardous Locations
871PH Series Sensors; 871A Series Sensors
PH10 Series Sensors; ORP10 Series Sensors
871CC Series Sensors
871CC Series Sensors
871CR Series Sensors
871EC Series Sensors
871FT Series Sensors
871DO Series Sensors
871PH Series Sensors; 871A Series Sensors
PH10 Series Sensors; ORP10 Series Sensors

Maximum cable length of certified 871EC or 871FT: 100 ft; 871PH, 871A, PH10, ORP10, 871CC, or
871CR: 500 ft.

! WARNING
Explosion Hazard - Substitution of components may impair suitability for Class I,
Division 2. Do not disconnect equipment unless power has been switched off or thearea is known to be non-hazardous.
TIP

Risque D’explosion - La substitution de composants peut rendre ce materielinacceptable pour les emplacements de Classe I, Division 2. Avant de deconnecter
l’equipement couper le courant ou s’assurer que l’emplacement est designe nondangereux.

18

4. pH, ORP, and ISE Sensors
FM Entity Approval, pH, ORP, and ISE Sensors,
Intrinsically Safe and Nonincendive
The 871A, 871PH, PH10, and ORP10 series of pH, ORP, and ISE sensors are FM Approved as
intrinsically safe and nonincendive for use in Division 1 and Division 2 hazardous (classified)areas respectively.
These sensors without preamplifiers meet the simple apparatus requirements as defined in
ANSI/ISA-PR12.06.01 and NEC NFPA 70. The nonamplified sensors do not generate morethan 1.5 volt, 100 mA, and 25 mW, or dissipate more than 1.3 W.
The sensor is typically installed in the (potentially) hazardous area. The 875PH Analyzer, the870ITPH Transmitter or other FM approved apparatus can be installed in either the nonhazardous or the hazardous area. Wiring and installation methods are determined by the area
(hazardous or non-hazardous) in which the associated equipment is installed. In all cases,
installation should be in accordance with “Installation of Intrinsically Safe Systems for Hazardous(Classified) Locations” (ANSI/ISA-PR12.06.01 or NEC NFPA 70) as appropriate and any
applicable local requirements.
! WARNING
Explosion Hazard - Do not disconnect equipment when a flammable or combustible
atmosphere is present unless power has been switched off.
! WARNING
Component Replacement or Substitution - Substitution of components may impair
intrinsic safety rating.
! WARNING
Parts of the enclosure are non-conducting and may generate an ignition-capable levelof electrostatic charge under certain extreme conditions. Ensure that the equipment is
not installed in a location where it may be subjected to external conditions whichmight cause a build up of electrostatic charge on nonconducting surfaces.
Additionally, cleaning of the equipment should be done only with a damp cloth.
The 871A, PH10, and ORP10 Sensors are designed as ‘consumables’. They cannot be repaired or
refurbished. Discard at end of life.
The 871PH Sensors can be rebuilt. Use only Foxboro rebuild kits to maintain the intrinsicallysafe or nonincendive ratings. Refer to MI 611-148 for additional information.
! WARNING
Intrinsically Safe Ground - The resistance between the intrinsically safe ground andearth ground must be less than 1.0 ohm.

19

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

NOTE

No revision is allowed to the 871A, 871PH, PH10, or ORP10 Sensor intrinsicallysafe or nonincendive installation instruction (FM control drawing) without prior
FM approval.

Intrinsically Safe Field Wiring Circuit Concept
The intrinsically safe field wiring circuit concept allows interconnection of intrinsically safe
apparatus with associated intrinsically safe apparatus not specifically examined as a system whenthe entity parameters are compatible such that:
Vmax or Ui  Voc, Vt, or Uo
Imax or Ii  Isc, It, or Io
Pmax or Pi  Po
Ca  Ci + CcableLa  Li = Lcable

Nonincendive Field Wiring Circuit Concept
The nonincendive field wiring circuit concept allows interconnection of nonincendive apparatus
with associated nonincendive apparatus not specifically examined as a system when the entity
parameters are compatible such that:
Vmax or Ui  Voc, Vt, or Uo
Imax or Ii  Isc, It, or Io
Pmax or Pi  Po
Ca  Ci + CcableLa  Li = Lcable! WARNING
The associated apparatus must be FM approved as either intrinsically safe or
nonincendive and must have compatible entity parameters. The associated apparatus
manufacturer’s installation drawing must be followed when installing the associatedequipment.

Associated Apparatus in Non-hazardous Area;
Sensor in Hazardous Area
There are no special requirements when an 875PH Analyzer, 870ITPH Transmitter, or other FM
entity approved associated apparatus is installed in a non-hazardous area. See Figure 13.

20

4. pH, ORP, and ISE Sensors

MI 611-206 – June 2011

NON-HAZARDOUS LOCATIONHAZARDOUS LOCATION
CLASS I, DIVISION 1, GROUPS A, B, C, D
CLASS II, DIVISION 1, GROUPS E, F, G
CLASS III, DIVISION 1
INTRINSICALLY SAFE
CLASS I, DIVISION 2, GROUPS A, B, C, D
CLASS II, DIVISION 2, GROUPS F, G
CLASS III, DIVISION 2NONINCENDIVEFM ENTITY APPROVED
875 ANALYZER,
870ITPH TRANSMITTER, OR
OTHER FM ENTITYAPPROVED APPARATUS

FM ENTITY APPROVED
871A, 871PH, ORP10, OR PH10
SENSOR

Figure 13. Sensor in Hazardous Location

Associated Apparatus and Sensor in Hazardous Area
All connections to the 875PH Analyzer, 870ITPH Transmitter, or other FM entity approved
associated apparatus (except connections to the sensor) must be protected by conduit to prevent
damage to the wiring in the hazardous area. Conduit and all fittings to the 875PH Analyzer,
870ITPH Transmitter, or associated apparatus, including the sensor cable fitting, must meet
ingress protection ratings of Type 4X and IP66 within the Hazardous area; follow the
manufacturer’s instructions for the associated apparatus. See Figure 14.
HAZARDOUS LOCATIONNON-HAZARDOUS
LOCATION

CLASS I, DIVISION 1, GROUPS A, B, C, D
CLASS II, DIVISION 1, GROUPS E, F, G
CLASS III, DIVISION 1
INTRINSICALLY SAFE
CLASS I, DIVISION 2, GROUPS A, B, C, D
CLASS II, DIVISION 2, GROUPS F, G
CLASS III, DIVISION 2NONINCENDIVEFM ENTITY APPROVED
875PH ANALYZER,
870ITPH TRANSMITTER,
OR OTHER FM ENTITYAPPROVED APPARATUS

FM ENTITY APPROVED
871A, 871PH, ORP10, OR PH10
SENSOR

Figure 14. Sensor and Associated Apparatus in Hazardous Location21

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

Entity and Field Wiring Parameters
The entity and field wiring parameters listed below apply to all models of the pH, ORP, and ISE
sensors of the 871A, 871PH, PH10, and ORP10 families of sensors.
Vmax (Ui) = 10 V
Imax (Ii) = 80 mA
Pmax (Pi) = 0.63 W
Ci = 0.15 F
Li = 0 mH

Pin Terminated Integral Cable Connections
Sensors Without Preamplifier
Table 2. Cable Connections - Sensors Without Preamplifier
Function/Signal
Description

Wire Sleeve Standard Temperature
Designation
Cable

RTD/Thermistor Return
RTD Thermistor Drive
RTD/Thermistor 3-Wire
Measuring Electrode
Measuring Electrode Shield
Solution Ground
Reference Electrode

1
2
2A
3
3A
4
5

High Temperature
Cable

BLK
BLK
DRK GRN
BRN
WHT
ORN
CLEAR (Coax)
CLEAR (Coax)
CLEAR (Coax Shield) CLEAR (Coax Shield)
GRN (Outer Shield) GRN (Outer Shield)
RED
RED

Sensors With Preamplifier
Table 3. Cable Connections - Sensors With Preamplifier
Function/Signal
Description
RTD/Thermistor Return
RTD Thermistor Drive
RTD/Thermistor 3-Wire
Measuring Electrode
Solution Ground
Reference ElectrodePower to Sensor (+)
Power to Sensor (-)
Diagnostic Drive

22

Wire Sleeve Standard Temperature
Designation
Cable
1
2
2A
3
4
5
6
7
8

BLK
WHT
ORN
RED
CLEAR (Outer Shield)
YEL
BRN
BLU
GRN

4. pH, ORP, and ISE Sensors

MI 611-206 – June 2011

Patch Cable Connections
Variopin Connector - Sensors Without Preamplifier
Table 4. Cable Connections - Variopin Connector/Sensors Without Preamplifier
Function/Signal
Description

Wire Sleeve Variopin Standard Temperature
Designation Contact
Cable

RTD/Thermistor Return
RTD Thermistor Drive
RTD/Thermistor 3-Wire
Measuring Electrode
Measuring Electrode Shield
Solution Ground
Reference Electrode
Unused

1
2
2A
3
3A
4
5
---

3
5
6
1
8
7
2
4

High Temperature
Cable

BLK
BLK
DRK GRN
BRN
WHT
ORN
CLEAR (Coax)
WHITE (Coax)
CLEAR (Coax Shield) CLEAR (Coax Shield)
GRN (Outer Shield) GRN (Outer Shield)
RED
RED
-----

Variopin connector pin numbers on sensors with integrally mounted connectors correspond to
the function/signal description listed. Refer to Figure 15 for connector pin identification.

Variopin Connector - Sensors With Preamplifier
Table 5. Cable Connections - Variopin Connector/Sensors With Preamplifier
Function/Signal
Description
RTD/Thermistor Return
RTD Thermistor Drive
Measuring Electrode
Solution Ground
Reference ElectrodePower to Sensor (+)
Power to Sensor (-)
Diagnostic Drive

Wire Sleeve Variopin Standard Temperature
Designation Contact
Cable
1
2
3
4
5
6
7
8

3
5
1
7
2
4
6
8

BLK
WHT
RED
CLEAR (Outer Shield)
YEL
BRN
BLU
GRN

Variopin connector pin numbers on sensors with integrally mounted connectors correspond to
the function/signal description listed. Refer to Figure 15 for connector pin identification.

23

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

2

1

3

8

4

7
6

5

PIN 2 IS THE LONG PIN

Figure 15. Variopin Connector Pin Identification

Tajimi Connector - Sensors With Preamplifier
Table 6. Cable Connections - Tajimi Connector/Sensors With Preamplifier
Function/Signal
Description

Wire Sleeve
Designation

TajimiContact

Standard Temperature
Cable

RTD/Thermistor Return
RTD Thermistor Drive
Measuring Electrode
Solution Ground
Reference ElectrodePower to Sensor (+)
Power to Sensor (-)

1
2
3
4
5
6
7

D
C
F
B
E
A
G

BLK
WHT
RED
CLEAR (Outer Shield)
YEL
BRN
BLU

Refer to Figure 16 for connector pin identification.

F

A
G

E
D

B
C

Figure 16. Tajimi Connector Pin Identification24

4. pH, ORP, and ISE Sensors

MI 611-206 – June 2011

FM Approvals Listing
871 pH/ORP Series Sensors
IS / I,II,III / 1 / ABCDEFG / T4 Ta = 60 °C; Entity; Type 4X
Ni / I / 2 ABCD / T4 Ta = 60 °C; Nonincendive field wiring
S / II, III / 2 /FG / T4 Ta = 60 °C
Entity Parameters
Vmax (Ui) = 10 V
Imax (Ii) = 80 mA
Pmax (Pi) = 0.63 W
Ci = 0.15 F
Li = 0 mH
Field Wiring Parameters
Vmax (Ui) = 10 V
Imax (Ii) = 80 mA
Pmax (Pi) = 0.63 W
Ci = 0.15 F
Li = 0 mH
871A-ab-c-CS-E/Fd. Sensor
a = Integral preamplifier and diagnostic configuration: 1, 2, 3, or 4
b = Measuring Electrode: D, E, or F
c = Options: 1, 3, 5, 7, 13, B, or Q
d = Hazardous Approval AA or NN
871PH-abcd-e-CS-E/Ff. Sensor
a = Sensor body materials integral preamplifier and diagnostic configuration: 1, 2, 3, 4, 5, or 6
b = Measuring Electrode and electrode body material: A, B, C, D, E, F, G, P, Q, R, S, T, U, or X
c = Sensor wetted metallic parts material: 1, 2, 3, 5, or 6
d = Reference junction and junction body material: A, B, or D
e = Options: 3, 4, 34, 5, 7, B, C, E, H, Q, or T
f = Hazardous Approval: AA or NN
PH10-abcd-e-CS-E/Ff. Sensor
a = PH electrode: 1, 2, 3, or 4
b = Preamplifier: P or N
c = Temperature compensation: 1, 2, 3, 4, or 5
d = Termination: A, B, or Q
e = Options: E, C, 2, 3, 4, 5, 1H, 2H, 3H, 4H, or 5H
f = Hazardous Approval: AA or NN
ORP10-abcd-e-CS-E/Ff. Sensor
a = ORP electrode: 1 or 2
b = Preamplifier: P or N
c = Temperature compensation: 1, 2, 3, 4, or 5
d = Termination: A, B, or Q
e = Options: E, C, 2, 3, 4, 5, 1H, 2H, 3H, 4H, or 5H
f = Hazardous Approval: AA or NN25

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

Equipment Ratings
Evaluated as intrinsically safe electrical apparatus with entity requirements for use in Class I, II,
III, Division 1, Groups A, B, C, D, E, F, and G in accordance with manufacturing control
drawing; Nonincendive with nonincendive field wiring for Class I, Division 2, Groups A, B, C,
and D; Suitable for Class II, Division 2, Groups F and G indoor/outdoor Type 4X hazardous(classified) locations.

26

4. pH, ORP, and ISE Sensors

MI 611-206 – June 2011

IECEx Entity Approval, 871PH, 871A, PH10, and
ORP10 Sensors, Type ia and Type n
The 871PH, 871A, PH10, and ORP10 Sensors are IECEx Approved as Type ia and Type n foruse in Zone 0 and Zone 2 hazardous (classified) areas respectively.
These sensors without preamplifiers meet the simple apparatus requirements as defined in
ANSI/ISA-PR12.06.01 and NEC NFPA 70. The nonamplified sensors do not generate morethan 1.5 volt, 100 mA, and 25 mW, or dissipate more than 1.3 W.
The sensors are typically installed in the (potentially) hazardous area. The 875PH Analyzer orother IECEx Approved apparatus can be installed in either the non-hazardous or the hazardous
area. Wiring and installation methods are determined by the area (hazardous or non-hazardous)
in which the associated equipment is installed. In all cases, installation should be in accordancewith regulations of the country of installation! DANGER
When installing or removing sensors, wear appropriate protective clothing including
safety goggles. Escaping chemicals can cause severe injury including blindness.
! WARNING
1. Use care when connecting and disconnecting high-pressure service connections.
Use proper gloves and follow the recommended procedures to avoid injury to
personnel or damage to equipment.
2. When processing hazardous liquids, follow the recommended procedures. Failure
to do so could result in injury to personnel and damage to equipment.
! WARNING
In addition to the pressure and temperature limits of the sensor, the sensor mounting
accessories also have pressure and temperature limits. The specifications for themounting accessories may be greater or less than the sensor specifications. Always use
the lesser of the specification limits when designing the installation of a sensor withaccessories.
! WARNING
Explosion Hazard - Do not disconnect equipment when a flammable or combustible
atmosphere is present unless power has been switched off.
! WARNING
Component Replacement or Substitution - Substitution of components may impair
IECEx safety ratings.
! WARNING
Associated Apparatus - The associated apparatus must be IECEx certified as either
Type ia or Type n and must have compatible entity parameters. The associatedapparatus manufacturer's installation instructions must be followed when installing27

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

the associated apparatus.
Both the Sensor and the Associated Apparatus must have the same safety rating, either
both Type ia or both Type n.
! WARNING
Parts of the enclosure are non-conducting and may generate an ignition-capable levelof electrostatic charge under certain extreme conditions. Ensure that the equipment is
not installed in a location where it may be subjected to external conditions whichmight cause a build up of electrostatic charge on nonconducting surfaces.
Additionally, cleaning of the equipment should be done only with a damp cloth.
! CAUTION
To prevent damage, use care when handling sensitive sensor components such as glass
electrodes.

Associated Apparatus in Non-hazardous Area,
Sensor in Hazardous Area
There are no special requirements when the 875PH Analyzer or other IECEx entity approved
associated apparatus is installed in a non-hazardous area. See Figure 17.
NON-HAZARDOUS LOCATIONHAZARDOUS LOCATION
Ex ia IIC T4; -20 °C  Ta  +85 °C
ZONE 0IECEx ENTITYAPPROVED APPARATUS

IECEx ENTITY APPROVED
871PH, 871A, PH10, ORP10
SENSORS

Figure 17. Sensor in Zone 0 Hazardous Location28

4. pH, ORP, and ISE Sensors

MI 611-206 – June 2011

NON-HAZARDOUS LOCATIONHAZARDOUS LOCATIONEx nL IIC T4; -40 °C Ta  +85 °C
ZONE 2IECEx ENTITY APPROVED
875PH ANALYZER
OR OTHER IECEx ENTITYAPPROVED APPARATUS

IECEx ENTITY APPROVED
871PH, 871A, PH10, ORP10
SENSORS

Figure 18. Sensor in Zone 2 Hazardous Location

Associated Apparatus and Sensor in Hazardous Area
All connections to the 875PH Analyzer or other IECEx entity approved associated apparatus(except connections to the sensor) must be protected by conduit to prevent damage to the wiringin the hazardous area. Conduit and all fittings to the 875PH Analyzer or associated apparatus,
including the sensor cable fitting must meet ingress protection ratings of IEC IP66 within thehazardous area; follow the manufacturer's safety installation instructions for the associatedapparatus. See Figure 19.
NON-HAZARDOUS
LOCATION

HAZARDOUS LOCATION
Ex ia IIC T4; -20 °C Ta  +85 °C
ZONE 0IECEx ENTITYAPPROVED APPARATUS

IECEx ENTITY APPROVED
871PH, 871A, PH10, ORP10
SENSORS

Figure 19. Sensor and Associated Apparatus in Zone 0 Hazardous Location

NON-HAZARDOUS
LOCATION

HAZARDOUS LOCATION
Ex nC nL IIC T4 (-20 °C Ta 85 °C)
ZONE 2IECEx ENTITY APPROVED
875PH ANALYZER
OR OTHER IECEx ENTITYAPPROVED APPARATUS

IECEx ENTITY APPROVED
871PH, 871A, PH10, ORP10
SENSORS

Figure 20. Sensor and Associated Apparatus in Zone 2 Hazardous Location29

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

871PH
Sensor Identification
Typical agency, body, and data labels are shown in Figures 21 and 22.
BODY LABEL (BL)AGENCY LABEL (AL)
MODEL 871PH-1A1A-3 ST A
Ex ia IIC T4
CERTIFICATION CS-E/DAA-200C < Ta < +850C
SERIAL NO. 390059020001
IECEx FMG 07.0008 X
ORIGIN 2B0412 871PH-1A1A
SEE CERTIFICATE FOR DATA
2B0125INVENSYS
SYSTEMS
INC
INSTALL PER MI 611-206
FOXBORO MA. U.S.A. 02035

871PH-1A1A
2B0412DATA LABEL (DL)
MODEL
871PH-1A1A-3

STYLE
A

AL

DL

DL

BL

2B0412

AL

Figure 21. Sample 871PH (Cable Terminated) Sensor Identification

Ex ia IIC T4 0
0
-20 C < Ta < +85 C
IECEx FMG 07.0008 X
MOD. 871PH-1A1A-3 SER NO. 390059020001
INVENSYS SYSTEMS INC
ST AFigure 22. Sample 871PH (Quick Connector Terminated) Sensor Identification

Electrical Safety Design CodeThe electrical safety design code is printed on the agency label. See Figures 21 and 22. See Table 7
for additional information.

30

4. pH, ORP, and ISE Sensors

MI 611-206 – June 2011

Table 7. Electrical Safety Specification

Testing Laboratory,
Type of Protection, and Area
Classification

Application Conditions

IECEx intrinsically safe for
Temperature Class T4; -20 °C Ta +85 °C
Ex ia IIC
IECEx Type n energy limited for Temperature Class T4; -20 °C Ta +85 °C
Ex nL IIC

Electrical
Safety Design
Code
CS-E/DAA
CS-E/DNN

NOTE

These sensors have been designed to meet the electrical safety descriptions listed in
the table above. For detailed information, or status of testing laboratory
approvals/certifications, contact Invensys.
Entity Parameters for CS-E/DAA and CS-E/DNN are as follows:
Ui = 10 V
Ii = 80 mA
Pi = 0.6 W
Ci = 0.15 F for 871PH-1, -2, -3, and -4 (with preamplifier)Ci = 0 F for 871PH-5 and -6 (without preamplifier)
Li = 0 mH

Pressure and Temperature Limits
The pressure and operating temperature limits vary depending on the sensor body material, themeasuring electrode type, and whether a ball valve, submersible, or in-line installation is used.
The sensor body material and measuring electrode is identified in the model number on the datalabel. See Figure 23.
SENSOR BODY MATERIAL
MEASURING ELECTRODE AND ELECTRODE BODY MATERIALSENSOR WETTED METALLIC PARTS MATERIALREFERENCE JUNCTION AND BODY MATERIAL

871PH-1 A 1 A
Figure 23. 871PH Model Coded Example
Sensor Body Material-1, -3, or -5 = Ryton-2, -4, or -6 = CPVC31

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

Measuring Electrode and Electrode Body Material

Table 8. Measuring Electrode and Electrode Body Material
Code
A
B
D
E
F
G
P
Q
R
S
T
U
X

Electrode Material

Body Material

pH, Spherical Glass
Ryton
pH, Antimony
Ryton
ORP, Platinum
Ryton
ORP, Gold
Ryton
pH, Flat Glass
Ryton
pH, Domed High Temperature Glass Ryton
pH, Spherical Glass
ptfe
pH, Antimony
ctfe
ORP, Platinum
ctfe
ORP, Gold
ctfe
pH, Flat Glass
ptfe
pH, Domed High Temperature Glass ptfe
None

Refer to Tables 9 and 10 for pressure and temperature limits.
NOTE

In the tables, in-line installation means that only the sensing end, not the sensor
body, is immersed in the solution. Submersion installation is when the entire sensor
assembly (sensing end and body) is completely submersed.

Table 9. Maximum Pressure and Operating Temperature Limits for Sensor with Ryton Body

Ball Valve or Submersible
Installation
MeasuringElectrode Type
Flat Glass pH
Spherical Glass pH
Domed Glass pH
Antimony pH
ORP

32

Maximum
Pressure
1 MPa(150 psi)
0.7 MPa(100 psi)
0.7 MPa(100 psi)
1 MPa(150 psi)
1 MPa(150 psi)

Temperature
Range-5 to +80 °C(20 to 175 °F)-5 to +80 °C(20 to 175 °F)
0 to +80 °C(32 to 175 °F)-5 to +80 °C(20 to 175 °F)-5 to +80 °C(20 to 175 °F)

In-Line Installation
Maximum
Pressure
1 MPa(150 psi)
0.7 MPa(100 psi)
0.7 MPa(100 psi)
1 MPa(150 psi)
1 MPa(150 psi)

Temperature
Range-5 to +85 °C(20 to 185 °F)-5 to +85 °C(20 to 185 °F)
0 to +85 °C(32 to 185 °F)-5 to +85 °C(20 to 185 °F)-5 to +85 °C(20 to 185 °F)

4. pH, ORP, and ISE Sensors

MI 611-206 – June 2011

! WARNING
Maximum allowable temperature and pressure may be limited by installation
hardware used. Refer also to the temperature and pressure specifications on all
appropriate bushings, tees, flow chambers, and ball valve assemblies.

Table 10. Maximum Pressure at Various Operating Temperatures for Sensor with CPVC Body

Ball Valve or Submersible Installation

In-Line Installation

Measuring
Maximum Pressure at Operating
Maximum Pressure atElectrode Type
Temperature
Operating Temperature
Flat Glass pH
0.6 MPa
0.3 MPa
0.9 MPa
0.3 MPa
Spherical Glass pH* 0.9 MPa(125 psi) at (90 psi) at (50 psi) at (125 psi) at (50 psi) at
Domed Glass pH*
-5 °C
50 °C
80 °C
-5 °C
80 °C
Antimony pH(20 °F)(120 °F)(175 °F)(20 °F)(175 °F)
ORP* Maximum pressure at -5 °C (20 °F) for Spherical Glass pH and at 0 °C (32 °F) for Domed Glass pH Electrode is
0.7 MPa (100 psi).

! WARNING
Maximum allowable temperature and pressure may be limited by installation
hardware used. Refer also to the temperature and pressure specifications on all
appropriate bushings, tees, flow chambers, and ball valve assemblies.

Process Wetted Materials
The process wetted materials of your sensor are identified in the model code on the data label. See
Figure 23 and the following text.
Sensor Body Material-1, 3, or 5 = Ryton-2, 4, or 6 = CPVC
Sensor Wetted Metallic Parts Material

1 = Titanium
2 = Carpenter 20 Cb-3
3 = 316L Stainless Steel
5 = Monel®
6 = Tantalum33

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

Reference Junction and Body Material

Table 11. Reference Junction and Body Material
Code

Reference Junction Material Body Material

A
B
D

Ceramic
Ceramic
Ceramic

Ryton
ptfe
pvdf

871A
Sensor Identification
Typical agency and data labels are shown in Figure 24.
AGENCY LABEL (AL)

DATA LABEL (DL)

MODEL 871A-1F-1
ST A
Ex ia IIC T4
CERTIFICATION CS-E/DAA-200C < Ta < +850C
SERIAL NO. 390059020001
IECEx FMG 07.0008 X
ORIGIN 2B0412
SEE CERTIFICATE FOR DATAINVENSYS SYSTEMS INC
INSTALL PER MI 611-206
FOXBORO MA. U.S.A. 02035

AL

DL

DL

MODEL
871A-1F-1

STYLE
A
®

2B0412

AL

Figure 24. Sample 871A Sensor Identification

Electrical Safety Design CodeThe electrical safety design code is printed on the agency label. See Figure 24. See Table 12 foradditional information.
Table 12. Electrical Safety Specification
Testing Laboratory,
Type of Protection, andArea Classification

Application Conditions

IECEx intrinsically safe for
Temperature Class T4; -20 °C Ta +85 °C
Ex ia IIC
IECEx Type n energy limited for Temperature Class T4; -20 °C Ta +85 °C
Ex nL IIC

34

Electrical Safety
Design Code
CS-E/DAA
CS-E/DNN

4. pH, ORP, and ISE Sensors

MI 611-206 – June 2011

NOTE

These sensors have been designed to meet the electrical safety descriptions listed in
the table above. For detailed information, or status of testing laboratory
approvals/certifications, contact Invensys.
Entity Parameters for CS-E/DAA and CS-E/DNN are as follows:
Ui = 10 V
Ii = 80 mA
Pi = 0.6 W
Ci = 0.15 F for 871A-2, and -4 (with preamplifier)Ci = 0 F for 871A-1 and -3 (without preamplifier)
Li = 0 mH

Pressure and Temperature Limits

840
770
700
630
560
490
420
350
280
210
140
70
0

Normal Operating
Condition Limits
A

A

A

A

A
0

B

B
A

Process Pressure, psig

Process Pressure, kPa Gauge

Pressure and temperature limits are shown in Figure 25.

120
110
100
90
80
70
60
50
40
30
20
70
0

Normal Operating
Condition Limits
A

A

A

A
B

A

A

B

5 55 60 65 70 75 80 85 90 95 100
30 40
120
140
160
180
Process Temperature, °F
Process Temperature, °C
A = In-line or in-situ mounting
B = In-line mounting only

200

Figure 25. Pressure and Temperature Limits35

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

Process Wetted Parts
Process wetted parts are as follows:
Body: PVDF (polyvinylidene fluoride)
Reference Electrode: Ceramic Junction
O-ring: EPR (ethylene propylene rubber)
Measuring Electrode: Per the model number on the data label. See Figure 26.
MEASURING ELECTRODE MATERIAL

871A- 1 F
Figure 26. 871A Model Code Example
where:
D = ORP, Platinum
E = ORP, GoldF = pH, Flat Glass

PH10 and ORP10
Sensor Identification
Typical agency and data labels are shown in Figures 27 and 28.
AGENCY LABEL (AL)
MODEL PH10-2N1A
ST A
Ex ia IIC T4
CERTIFICATION CS-E/DAA-200C < Ta < +850C
SERIAL NO. 390059020001
IECEx FMG 07.0008 X
ORIGIN 2B0412
SEE CERTIFICATE FOR DATAINVENSYS SYSTEMS INC
INSTALL PER MI 611-206
FOXBORO MA. U.S.A. 02035

AL

DL

DL

DATA LABEL (DL)
MODEL
PH10-2N1A

STYLE
A

2B0412

AL

Figure 27. Sample PH10 or ORP10 (Cable Termination) Sensor Identification36

4. pH, ORP, and ISE Sensors

MI 611-206 – June 2011

Ex ia IIC T4 0
0
-20 C < Ta < +85 C
IECEx FMG 07.0008 X
MOD. PH10-2N1Q SER NO. 390059020001
INVENSYS SYSTEMS INC
ST AFigure 28. Sample PH10 or ORP10 (Quick Connector Termination) Sensor Identification

Electrical Safety Design CodeThe electrical safety design code is printed on the agency plate. See Figure 27. See Table 13 foradditional information.
Table 13. Electrical Safety Specification
Testing Laboratory,
Type of Protection, andArea Classification

Application Conditions

IECEx intrinsically safe for
Temperature Class T4; -20 °C Ta +85 °C
Ex ia IIC
IECEx Type n energy limited for Temperature Class T4; -20 °C Ta +85 °C
Ex nL IIC

Electrical Safety
Design Code
CS-E/DAA
CS-E/DNN

NOTE

These sensors have been designed to meet the electrical safety descriptions listed in
the table above. For detailed information, or status of testing laboratory
approvals/certifications, contact Invensys.
Entity Parameters for CS-E/DAA and CS-E/DNN are as follows
Ui = 10 V
Ii = 80 mA
Pi = 0.6 W
Ci = 0.15 F for PH10-.P and ORP10-.P (with preamplifier)Ci = 0 F for PH10-.N and ORP10-.N (without preamplifier)
Li = 0 mH

Process Pressure Limits
0 and 0.7 MPa (0 and 100 psi).

Process Temperature Limits
0 to 85 °C (32 to 185 °F). For in-line installations of a DolpHin sensor with internal preamp, theupper body must be in ambient temperatures of 54 °C (130 °F) or less.

37

MI 611-206 – June 2011

4. pH, ORP, and ISE Sensors

Process Wetted Parts
Process wetted parts are as follows:
Sensor Body: Kynar
Reference Electrode: Ceramic Junction
Solution Ground: Conductive Kynar
Measuring Electrode
pH: Domed Glass, Flat Glass, or Antimony as specified.
See Figure 29 and the following text.
ORP: Platinum or Gold as specified.
See Figure 29 and the following text.
O-Ring: Viton standard; EPDM and Chemraz optional, as specified.
See Figure 29 and the following text.

ELECTRODE TYPEOPTIONAL SELECTIONS

PH10- or ORP10- 1 N 1 A - E

Figure 29. PH10 and ORP10 Model Code Example
Electrode TypeFor pH Sensors-1 = Domed, High Temperature, Glass Bulb with Protective Guard-2 = Domed, High Temperature, Glass Bulb w/o Protective Guard-3 = Flat Ruggedized Glass-4 = Antimony
For ORP Sensors-1 = Platinum-2 = Gold
Optional Selections-E = EPDM O-ring-C = Chemraz O-ring38

5. Electrodeless Conductivity
Sensors
FM Entity Approval, FT10 Noninvasive Nonmetallic
Electrodeless Conductivity Sensors, Intrinsically Safe
and Nonincendive
The FT10 Conductivity Sensor is FM Approved as intrinsically safe and nonincendive for use in
Division 1 and Division 2 hazardous (classified) areas respectively.
The sensor is typically installed in the (potentially) hazardous area. The 875EC Analyzer, the870ITEC Transmitter or other FM Approved apparatus can be installed in either the nonhazardous or the hazardous area. Wiring and installation methods are determined by the area
(hazardous or non-hazardous) in which the associated equipment is installed. In all cases,
installation should be in accordance with "Installation of Intrinsically Safe Systems for Hazardous(Classified) Locations" (ANSI/ISA RP 12.06.01) or the National Electrical Code (ANSI/NFPA70) as appropriate and any local requirements.
Canadian installations must be in accordance with the Canadian Electrical Code.
! WARNING
Explosion Hazard - Do not disconnect equipment when a flammable or combustible
atmosphere is present unless power has been switched off.
! WARNING
Component Replacement or Substitution - Substitution of components may impair
intrinsic safety rating.
! WARNING
Intrinsically Safe Ground - The resistance between the intrinsically safe ground andthe earth ground must be less than 1.0 ohm.
! WARNING
Ingress Protection - The FT10 sensor housing meets NEMA Type 4X ingress
protection only when the Calibration Port Cover is securely installed on the sensors
with integral cable (FT10-MT…1 or FT10-MT...2. The patch cable or protective
cover must also be securely installed on the sensors with cable connector (FT10MT…6) to meet NEMA Type 4X ingress protection.
! WARNING
Calibration Port Cover - The Calibration Port Cover must remain securely installed
during normal operation in a (potentially) hazardous location.

39

MI 611-206 – June 2011

5. Electrodeless Conductivity Sensors! WARNING
Ultra-Violet Radiation Exposure - The housing material will yellow and become
brittle with extended exposure to UV radiation (sunlight).
NOTE

No revision is allowed to the FT10 Sensor Intrinsically Safe or Nonincendive
Installation Instruction (FM Control Drawing) without prior FM approval.

Intrinsically Safe Field Wiring Circuit Concept
The intrinsically safe field wiring circuit concept allows interconnection of intrinsically safe
apparatus with associated intrinsically safe apparatus not specifically examined as a system whenthe entity parameters are compatible such that:
Vmax or Ui  Voc, Vt, or Uo
Imax or Ii  Isc, It, or Io
Pmax or Pi  Po
Ca  Ci + CcableLa  Li + Lcable

Nonincendive Field Wiring Circuit Concept
The nonincendive field wiring circuit concept allows interconnection of nonincendive safe
apparatus with associated nonincendive apparatus not specifically examined as a system when theentity parameters are compatible such that:
Vmax or Ui  Voc, Vt, or Uo
Ca Ci + CcableLa  Li + Lcable! WARNING
Associate Apparatus - The associated apparatus must be FM approved as either
intrinsically safe or nonincendive and must have compatible entity parameters. The
associated apparatus manufacturer's installation drawing (FM Control Drawing) mustbe followed when installing the associated apparatus.
! WARNING
Control equipment connected to associated apparatus must not use or generate morethan 250 V rms or V dc.

Associated Apparatus in Non-hazardous Area;
Sensor in Hazardous Area
There are no special requirements when the 875EC Analyzer, 870ITEC Transmitter or other FM
entity approved associated apparatus is installed in a non-hazardous area. All equipment mustmeet the safety rating required for the installation; that is, the associated apparatus and the sensor
must both be IS rated or NI rated. Refer to Figure 30.

40

5. Electrodeless Conductivity Sensors

NON-HAZARDOUS LOCATIONMI 611-206 – June 2011

HAZARDOUS LOCATIONINTRINSICALLY SAFE CLASS I, II, III;DIVISION 1, GROUPS A, B, C, D, E, F, GFM ENTITY APPROVED
870ITEC TRANSMITTER, OR
OTHER FM ENTITYAPPROVED APPARATUS

FM ENTITY APPROVED
FT10 ELECTRODELESSCONDUCTIVITY SENSOR

Figure 30. Sensor in Division 1 Hazardous Location

NON-HAZARDOUS LOCATIONFM ENTITY APPROVED
875EC ANALYZER,
870ITEC TRANSMITTER, OR
OTHER FM ENTITYAPPROVED APPARATUSNONINCENDIVE CLASS I, II, III;DIVISION 2, GROUPS A, B, C, D, E, F, GFM ENTITY APPROVED
FT10 ELECTRODELESSCONDUCTIVITY SENSOR

Figure 31. Sensor in Division 2 Hazardous Location

Associated Apparatus and Sensor in Hazardous Area
All connections to the 875EC Analyzer, 870ITEC Transmitter or other FM entity approved
associated apparatus (except connections to the sensor) must be protected by conduit to prevent
damage to the wiring in the hazardous area. Conduit and all fittings to the 875EC Analyzer,
870ITEC Transmitter or associated apparatus, including the sensor cable fitting must meet
ingress protection ratings of NEMA TYPE 4X and IP66 within the hazardous area; follow the
manufacturer's installation instructions (FM Control Drawing) for the associated apparatus. All
equipment must meet the safety rating required for the installation; that is, the associatedapparatus and the sensor must both be IS rated or NI rated. Refer to Figure 32.

41

MI 611-206 – June 2011

NON-HAZARDOUS
LOCATION

5. Electrodeless Conductivity Sensors

HAZARDOUS LOCATIONINTRINSICALLY SAFE CLASS I, II, III;DIVISION 1, GROUPS A, B, C, D, E, F, GFM ENTITY APPROVED
870ITEC TRANSMITTER,
OR OTHER FM ENTITYAPPROVED APPARATUS

FM ENTITY APPROVED
FT10 ELECTRODELESSCONDUCTIVITY SENSOR

Figure 32. Sensor and Associated Apparatus in Division 1 Hazardous Location

NON-HAZARDOUS
LOCATION

HAZARDOUS LOCATIONNONINCENDIVE CLASS I, II, III;DIVISION 2, GROUPS A, B, C, D, E, F, GFM ENTITY APPROVED
875EC ANALYZER,
870ITEC TRANSMITTER,
OR OTHER FM ENTITYAPPROVED APPARATUS

FM ENTITY APPROVED
FT10 ELECTRODELESSCONDUCTIVITY SENSOR

Figure 33. Sensor and Associated Apparatus in Division 2 Hazardous Location

Entity and Field Wiring Parameters
The entity and field wiring parameters listed below apply to all models of the FT10 ElectrodelessConductivity Sensor.
Vmax (Ui) = 10 V
Imax (Ii) = 80 mA
Pmax (Pi) = 0.200 W
Ci = 0 F
Li = 5.5 mH

Pin Terminated Integral Cable and Patch Cable
Connections
The individual connections are color coded. Additionally, each connection has a numbered sleevecorresponding to the terminal number on the 875EC Analyzer or 870ITEC Transmitter forincreased wiring ease. Refer to Figure 36 for 875EC Sensor Interface terminal connections or refer
to MI 611-224 for this and more general information. Refer to Figure 37 for 870ITEC Sensor
Interface terminal connections or refer to MI 611-212 for this and more general information.

42

5. Electrodeless Conductivity Sensors

MI 611-206 – June 2011

Table 14. Cable Connections
Function/Signal
Description

Wire Sleeve
Standard Temperature High Temperature
Designation Connector Pin(PVC) Cable(TFE) Cable

Sensor Drive
Sensor Drive
Drive Screen
Sensor ReturnSensor Return
RTD Return
RTD Drive
RTD 3-Wire
Cable Shield

1
A
2
B
3
C
4
D
5
E
6
F
7
G
8
H
Ring Terminal No Connection

BLK
WHT
CLEAR (Shield 1)
RED
CLEAR (Shield 2)
BRN
BLU
ORN
Not Used

BLK
WHT
CLEAR (Shield 1)
RED
CLEAR (Shield 2)
BRN
BLU
ORN
CLEAR (Shield)

BLK #1
WHT #2DR 1#3DR 3
GRN (NOT USED)DR 2 #5#1 BLK#2 WHT#3 CLEAR (DR 1 & DR 3)#4 RED#5 CLEAR (DR 2)

RED #4
BRN #6
BLU #7
ORN #8
DR 4 RING TERMINAL#6 BRN#7 BLU#8 ORNOVERALL DRAIN
HIGH TEMP. CABLE ONLYSCHEMATIC DIAGRAM

Figure 34. Cable Connections

Patch Cable Connector
Connector pin designations and the connector layout are shown for reference. Patch Cables inboth PVC (standard temperature) and TFE (high temperature) are available. Refer to
MI 611-217 for information.

A

G
H

F
E

B
C

D

Figure 35. Patch Cable Connector (as viewed on sensor)

43

ANALOG OUTPUTS ALARM 2

ALARM 1BLACK

GROUND LEAD WITH EYE TERMINALWHITESENSOR DRIVESENSOR DRIVE
CLEAR
SENSOR SCREENSENSOR RETURNREDSENSOR RETURN
CLEAR
BROWN RTD MEASUREMENT
RTD RETURNBLUEORANGE RTD 3-WIRE

Figure 36. 875EC Analyzer Sensor Wiring Connections

1 2 3 45 6 7 8

INPUT
POWER

+

CASE GROUND

Figure 37. 870ITEC Transmitter Sensor Wiring Connections

FM Approvals Listing
FT10-MTabcd-e. Flow-through Conductivity Sensors.
IS/I,II,III/1/ABCDEFG/T6 Ta = 65 °C - MI611-206; Entity;
I/0/AEx ia IIC T6 Ta = 65 °C; MI 611-206; Entity;
NI/I/2/ABCD/T6 Ta = 65 °C; MI 611-206; NIFW;

44

G

N

L

1NO

1NC

1C

2NO

2NC

2C

8
RTD 3-WIRE
(ORN)
MA2+

MA2–

7
RTD DRIVE(BLU)

DIGITAL INPUTS & PWR DIGITAL COMM

MA1–

MA1+

6
RTD RETURN(BRN)
RS-232

5
SENSOR RETURN(CLEAR)
COM1

4
COM2

SENSOR RETURN
(RED)

3
COM3

SENSOR SCREEN(SHIELD) (CLEAR)
COM4

DV–

SENSOR DRIVE
(WHT)
DV+

DI 4

SENSOR DRIVE
(BLK)

2

5. Electrodeless Conductivity Sensors

DI 3

DI 2

DI1

1

MI 611-206 – June 2011

POWER

5. Electrodeless Conductivity Sensors

MI 611-206 – June 2011

S/II/2/EFG/T6 Ta = 65 °C; MI 611-206; NIFW;
S/III/2/T6 Ta = 65 °C; MI 611-206; NIFW;
Type 4X; IP66
Entity Parameters:
Vmax = 10 V, Imax = 80 mA, Pi = 200 mW, Ci = 0 F, Li = 5.5 mH.
a= Line Size: 08, 12 or 16.
b = End Connection Form: F or N.
c = Termination: 1, 2 or 6.
d = RTD: T or R.
e = Options: 1, 2, 3 and/or 4.
Special Conditions of use:
The housing is designed for indoor use only. Refer to Ultra-Violet Radiation Exposure warningon page 40.

45

MI 611-206 – June 2011

5. Electrodeless Conductivity Sensors

IECEx Entity Approval, FT10 Noninvasive Nonmetallic
Electrodeless Conductivity Sensor, Type ia and Type n
The FT-10 Conductivity Sensor is IECEx Approved as Type ia and Type n for use in Zone 0 and
Zone 2 hazardous (classified) areas respectively.
The sensor is typically installed in the (potentially) hazardous area. The 875EC Analyzer, the870ITEC Transmitter or other IECEx Approved apparatus can be installed in either the nonhazardous or the hazardous area. Wiring and installation methods are determined by the area
(hazardous or non-hazardous) in which the associated equipment is installed. In all cases,
installation should be in accordance with regulations of the country of installation! WARNING
Explosion Hazard - Do not disconnect equipment when a flammable or combustible
atmosphere is present unless power has been switched off.
! WARNING
Component Replacement or Substitution - Substitution of components may impair
IECEx safety ratings.
! WARNING
Safety Ground - The grounding stud or conductive mounting means of the enclosureof the associated apparatus must be connected to the potential equalizing system
within the explosive atmosphere.
! WARNING
Ingress Protection - The FT10 sensor housing meets IP66 ingress protection only
when the Calibration Port Cover is securely installed on the sensors with integral cable(FT10-MT…1 or FT10-MT…2. The patch cable or protective cover must also be
securely installed on the sensors with cable connector (FT10-MT…6) to meet IP66
ingress protection.
Associate Apparatus - Connection of the FT10 Sensor to the associated apparatus
must be made in such a way that the degree of ingress protection remains at least IP54
per EN 60529 and is suitable for the environment.
! WARNING
Calibration Port Cover - The Calibration Port Cover must remain securely installed
during normal operation in a (potentially) hazardous location.
! WARNING
Associated Apparatus - The associated apparatus must be IECEx certified as either
Type ia or Type n and must have compatible entity parameters. The associatedapparatus manufacturer's installation instructions must be followed when installingthe associated apparatus.

46

5. Electrodeless Conductivity Sensors

MI 611-206 – June 2011

Both the Sensor and the Associated Apparatus must have the same safety rating, either
both Type ia or both Type n.
! WARNING
Ultra-Violet Radiation Exposure - The housing material will yellow and become
brittle with extended exposure to UV radiation (sunlight).

Sensor Identification
A Data Label with model number, serial number including date of manufacture, cell constants,pressure and temperature information is affixed to the front surface of the sensor. An Agency
Label with certification information is affixed to the rear surface. A third Warning Label is affixed
to the side with the calibration connector. Refer to the sample labels in Figures 38, 39, and 40.

Model Number: Per Sales Order
Serial Number: Origin code followed by anumber set per manufacturing standard
procedures. The Origin Code is explained
immediately below this figure.
GCF and ECF: Geometric and Electronic Cell
Factor values are determined by the model
number (line size) of the sensor.
MWP: Maximum Working Pressure values are
determined by the model number (line size) of
the sensor.
MRT: Maximum Rated Temperature is the
maximum process fluid temperature allowed at
the maximum ambient temperature Ta=65 °C.

Figure 38. Sample Data LabelThe origin code identifies the area of manufacture and the year and week of manufacture. A
typical code is 2B0725; this indicates manufacture in the Analytical Division at the Foxboro,
Massachusetts facility (2B) in the year 2007 (07) in week 25 of the year (25). The individual serial
number determined per manufacturing standard procedures is appended to the origin code.

47

MI 611-206 – June 2011

5. Electrodeless Conductivity Sensors

X

Figure 39. Sample Agency LabelThe type of protection (Type ia or Type n) is determined during fabrication and marked on the
Agency Label. Once determined, the type of protection may not be changed.

Figure 40. Sample Warning Label

Associated Apparatus in Non-hazardous Area,
Sensor in Hazardous Area
There are no special requirements when the 875EC Analyzer, 870ITEC Transmitter or other
IECEx entity approved associated apparatus is installed in a non-hazardous area. See Figure 41.

48

5. Electrodeless Conductivity Sensors

MI 611-206 – June 2011

NON-HAZARDOUS LOCATIONHAZARDOUS LOCATION
Ex ia IIC T6 Ta=65 °C (-10 °C Ta 65 °C)
ZONE 0IECEx ENTITY APPROVED
IECEx ENTITY APPROVED
FT10 ELECTRODELESSCONDUCTIVITY SENSOR

870ITEC TRANSMITTER, OR
OTHER FM ENTITYAPPROVED APPARATUS

Figure 41. Sensor in Zone 0 Hazardous Location

NON-HAZARDOUS LOCATIONHAZARDOUS LOCATION
Ex nC nL IIC T6 (-10 °C Ta 65 °C)
ZONE 2IECEx ENTITY APPROVED
875EC ANALYZER,
870ITEC TRANSMITTER, OR
OTHER FM ENTITYAPPROVED APPARATUS

IECEx ENTITY APPROVED
FT10 ELECTRODELESSCONDUCTIVITY SENSOR

Figure 42. Sensor in Zone 2 Hazardous Location

Associated Apparatus and Sensor in Hazardous Area
All connections to the 875EC Analyzer, 870ITEC Transmitter or other IECEx entity approved
associated apparatus (except connections to the sensor) must be protected by conduit to prevent
damage to the wiring in the hazardous area. Conduit and all fittings to the 875EC Analyzer,
870ITEC Transmitter or associated apparatus, including the sensor cable fitting must meet
ingress protection ratings of IEC IP66 within the hazardous area; follow the manufacturer's safety
installation instructions for the associated apparatus. See Figure 43.
NON-HAZARDOUS
LOCATION

HAZARDOUS LOCATION
Ex ia IIC T6 Ta=65 °C (-10 °C Ta 65 °C)
ZONE 0IECEx ENTITY APPROVED
870ITEC TRANSMITTER,
OR OTHER IECEx ENTITYAPPROVED APPARATUS

IECEx ENTITY APPROVED
FT10 ELECTRODELESSCONDUCTIVITY SENSOR

Figure 43. Sensor and Associated Apparatus in Zone 0 Hazardous Location49

MI 611-206 – June 2011

5. Electrodeless Conductivity Sensors

HAZARDOUS LOCATIONNON-HAZARDOUS
LOCATION

Ex nC nL IIC T6 (-10 °C Ta 65 °C)
ZONE 2IECEx ENTITY APPROVED
875EC ANALYZER,
870ITEC TRANSMITTER,
OR OTHER IECEx ENTITYAPPROVED APPARATUS

IECEx ENTITY APPROVED
FT10 ELECTRODELESSCONDUCTIVITY SENSOR

Figure 44. Sensor and Associated Apparatus in Zone 2 Hazardous Location

Entity and Field Wiring Parameters
The entity and field wiring parameters listed below apply to all models of the FT10 ElectrodelessConductivity Sensor.
Vmax (Ui) = 10 V
Imax (Ii) = 80 mA
Pmax (Pi) = 0.200 W
Ci = 0 F
Li = 5.5 mH

Pin Terminated Integral Cable and Patch Cable
Connections
The individual connections are color coded. Additionally, each connection has a numbered sleevecorresponding to the terminal number on the 875EC Analyzer or 870ITEC Transmitter forincreased wiring ease. Refer to Figure 47 for 875EC Sensor Interface terminal connections or refer
to MI 611-224 for this and more general information. Refer to Figure 48 or 870ITEC Sensor
Interface terminal connections or refer to MI 611-212 for this and more general information. The
ring terminal on the high temperature cable should be connected to chassis or earth ground in theassociated apparatus.
Table 15. Cable Connections
Function/Signal
Description

Wire Sleeve
Designation

Sensor Drive
Sensor Drive
Drive Screen
Sensor ReturnSensor Return
RTD Return
RTD Drive

1
2
3
4
5
6
7

50

Standard Temperature High Temperature
Connector Pin(PVC) Cable(TFE) Cable
A
B
C
D
E
F
G

BLK
WHT
CLEAR (Shield 1)
RED
CLEAR (Shield 2)
BRN
BLU

BLK
WHT
CLEAR (Shield 1)
RED
CLEAR (Shield 2)
BRN
BLU5. Electrodeless Conductivity Sensors

MI 611-206 – June 2011

Table 15. Cable Connections
Function/Signal
Description

Wire Sleeve
Designation

Standard Temperature High Temperature
Connector Pin(PVC) Cable(TFE) Cable

RTD 3-Wire
Cable Shield

8
H
Ring Terminal No Connection

ORN
Not Used

ORN
CLEAR (Shield)

BLK #1
WHT #2DR 1#3DR 3
GRN (NOT USED)DR 2 #5#1 BLK#2 WHT#3 CLEAR (DR 1 & DR 3)#4 RED#5 CLEAR (DR 2)

RED #4
BRN #6
BLU #7
ORN #8
DR 4 RING TERMINAL#6 BRN#7 BLU#8 ORNOVERALL DRAIN
HIGH TEMP. CABLE ONLYSCHEMATIC DIAGRAM

Figure 45. Cable Connections

Patch Cable Connector
Connector pin designations and the connector layout are shown for reference. Patch Cables inboth PVC (standard temperature) and TFE (high temperature) are available. Refer to
MI 611-217 for information.

A

G
H

F
E

B
C

D

Figure 46. Patch Cable Connector (as viewed on sensor)

51

ANALOG OUTPUTS ALARM 2

ALARM 1

G

N

L

1NO

1NC

1C

2NO

2NC

2C

8
RTD 3-WIRE
(ORN)
MA2+

MA2–

7
RTD DRIVE(BLU)

DIGITAL INPUTS & PWR DIGITAL COMM

MA1–

MA1+

6
RTD RETURN(BRN)
RS-232

5
SENSOR RETURN(CLEAR)
COM1

4
COM2

SENSOR RETURN
(RED)

3
COM3

SENSOR SCREEN(SHIELD) (CLEAR)
COM4

DV–

SENSOR DRIVE
(WHT)
DV+

DI 4

SENSOR DRIVE
(BLK)

2

5. Electrodeless Conductivity Sensors

DI 3

DI 2

DI1

1

MI 611-206 – June 2011

POWER

BLACK

GROUND LEAD WITH EYE TERMINALWHITESENSOR DRIVESENSOR DRIVE
CLEAR
SENSOR SCREENSENSOR RETURNREDSENSOR RETURN
CLEAR
BROWN RTD MEASUREMENT
RTD RETURNBLUEORANGE RTD 3-WIRE

Figure 47. 875EC Analyzer Sensor Wiring Connections

1 2 3 45 6 7 8

INPUT
POWER

+

CASE GROUND

Figure 48. 870ITEC Transmitter Sensor Wiring Connections

Special Conditions of use
The housing is designed for indoor use only. Refer to Ultra-Violet Radiation Exposure warningon page 47.

52

6. 876 Transmitters
FM Entity Approval
NON-HAZARDOUS LOCATIONHAZARDOUS LOCATIONFM Approved+

Associated Apparatus
or
Associated Nonincendive

876 Series–

Transmitter

Field Wiring Apparatus(Barrier)

SimpleApparatusor
FM Approved
SensorINTRINSICALLY SAFE ISClass I, Division 1, Groups A, B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1
Class I, Zone 0, AEx ia IIC
876 Series Transmitter
Entity Parameters
Ui or Vmax < 30 V dc
Ii or Imax < 110 mA
Pi < 800 mW
Ci = 3 nF
Li = 9.9 H

876PH Sensor Terminal
Entity Parameters

876EC Sensor Terminal
Entity Parameters

Uo or Voc = 8.6 V dc
Io or Isc = 40 mA
Po = 350 mW
Co = 0.5 F
Lo = 1.0 mH

Uo or Voc = 6.5 V dc
Io or Isc = 110 mA
Po = 0.10 W
Co = 0.3 F
Lo = 0.1 mH

876CR Sensor Terminal
Entity Parameters
Uo or Voc = 13 V dc
Io or Isc = 40 mA
Po = 0.35 W
Co = 0.5 F
Lo = 1.0 mH

NONINCENDIVE, FIELD WIRING NI
Class I, Division 2, Groups A, B, C, D
Class II, Division 2, Groups E, F, G
Class III, Division 2
Class I, Zone 2, AEx nC IIC
876 Series Transmitter
Entity Parameters

876PH Sensor Terminal
Entity Parameters

876EC Sensor Terminal
Entity Parameters

876CR Sensor Terminal
Entity Parameters

Ui or Vmax < 42 V dc
Ii or Imax < 22 mA

Uo or Voc = 8.6 V dc
Io or Isc = 40 mA
Po = 350 mW
Co = 43 F
Lo = 28 mH

Uo or Voc = 6.5 V dc
Io or Isc = 110 mA
Po = 0.10 W
Co = 300 F
Lo = 3.7 mH

Uo or Voc = 13 V dc
Io or Isc = 40 mA
Po = 0.35 W
Co = 5.5 F
Lo = 28 mH

Ci = 3 nF
Li = 9.9 H

53

MI 611-206 – June 2011

6. 876 Transmitters! WARNING
Explosion Hazard - Substitution of components may impair suitability for Class I,
Division 2. Do not disconnect equipment unless power has been switched off or thearea is known to be non-hazardous.
! WARNING
To prevent ignition of flammable or combustible atmospheres, disconnect power
before servicing.
! WARNING
The 876 Transmitter enclosure is made of aluminum alloy. When used in a potentiallyexplosive atmosphere requiring apparatus equipment category 1 G, the 876
Transmitter must be installed so that, even in the event of rare incidents, an ignition
source due to impact or friction between the enclosure and iron/steel is excluded.
! WARNING
The optional storm door (option code -7) and keypad area is nonconducting and may
generate an ignition-capable level of electrostatic charge under certain extreme
conditions. Ensure that the equipment is not installed in a location where it may besubjected to external conditions which might cause a build-up of electrostatic charge
on nonconducting surfaces. Additionally, cleaning of the storm door and keypad area
should only be done with a damp cloth.
! WARNING
Make electrical connection in such a way that the degree of ingress protection on theenclosure remains at least IP66 per ANSI/IEC 60529 and is suitable for theenvironment.
! CAUTION
The associated apparatus manufacturer’s installation drawing must be followed when
installing this equipment.
General Notes
1. No revision to drawing without prior FM approval.
2. Associated apparatus (Barrier) manufacturer’s installation drawings must be followed
when installing this equipment.
3. Associated apparatus (Barrier) must be installed in an enclosure that meets therequirements of ANSI/ISA S82.01.
4. The Associated Apparatus (Barrier) must be FM approved.
5. Control equipment connected to barrier must not use or generate more than 250
Vrms or V dc.

54

6. 876 Transmitters

MI 611-206 – June 2011

6. Resistance between Intrinsically Safe ground and earth ground must be less than 1.0
ohm.
7. Installation should be in accordance with ANSI/ISA RP 12.06.01 “Installation ofIntrinsically Safe Systems for Hazardous (Classified) Locations”, and the National
Electrical Code (ANSI/NFPA 70).
8. Simple Apparatus or FM approved sensor should be connected to the transmitter’s
sensor terminals.
Simple Apparatus as defined by NEC is an electrical component or combination ofcomponents of simple construction with well-defined electrical parameters that does
not generate more than 1.5 volts, 100 milliamperes, and 25 milliwatts, or a passive
component that does not dissipate more than 1.3 watts and is compatible with the
intrinsic safety of the circuit in which it is used.
9. An approved dust-tight seal is required for Class II and III applications.
Nonincendive Notes:
1. Install per National Electrical Code (NEC) using wiring methods described in article
500 through article 510.
2. Intrinsic safety barrier not required.
3. Nonincendive field wiring installation
The Nonincendive Field Wiring Circuits Concept allows interconnection ofnonincendive apparatus with associated nonincendive apparatus not specificallyexamined in combination as system when:Vmax > Voc or Vt; Ca > Ci + Ccable; La > Li + Lcable
Nonincendive field wiring enables interconnection of nonincendive field wiring
apparatus with associated nonincendive field wiring apparatus not specificallyexamined in combination as a system under one of the following conditions:a. Current Controlled
Normal operating current controlled or limited by the nonincendive field wiring
apparatus (unlike the requirements for intrinsically safe apparatus Imax of thenonincendive field wiring apparatus need not be greater that the Isc of theassociated nonincendive field wiring apparatus)
Vmax > Voc or Vt; Ca > Ci + Ccable; La > Li + Lcableb. Not Current Controlled
Normal operating voltage or current not controlled or limited by thenonincendive field wiring apparatus
Vmax > Voc or Vt; Imax > Isc or It ; Ca > Ci + Ccable; La > Li + Lcable55

MI 611-206 – June 2011

6. 876 Transmitters

CSA Entity Approval
NON-HAZARDOUS LOCATIONHAZARDOUS LOCATIONCSA Approved+

Associated Apparatus
or
Associated Nonincendive

876 Series–

Transmitter

Field Wiring Apparatus(Barrier)

SimpleApparatusor
CSA Approved
SensorINTRINSICALLY SAFE ISClass I, Division 1, Groups A, B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1
Class I, Zone 0, Ex ia IIC
876 Series Transmitter
Entity Parameters
Ui or Vmax < 30 V dc
Ii or Imax < 110 mA
Pi < 800 mW
Ci = 3 nF
Li = 9.9 H

876PH Sensor Terminal
Entity Parameters
Uo or Voc = 8.6 V dc
Io or Isc = 40 mA
Po = 350 mW
Co = 0.5 F
Lo = 1.0 mH

876EC Sensor Terminal
Entity Parameters
Uo or Voc = 6.5 V dc
Io or Isc = 110 mA
Po = 0.10 W
Co = 0.3 F
Lo = 0.1 mH

876CR Sensor Terminal
Entity Parameters
Uo or Voc = 13 V dc
Io or Isc = 40 mA
Po = 0.35 W
Co = 0.5 F
Lo = 1.0 mH

NONINCENDIVE, FIELD WIRING NI
Class I, Division 2, Groups A, B, C, D
Class II, Division 2, Groups E, F, G
Class III, Division 2
Class I, Zone 2, Ex nL IIC
876 Series Transmitter
Entity Parameters

876PH Sensor Terminal
Entity Parameters

876EC Sensor Terminal
Entity Parameters

876CR Sensor Terminal
Entity Parameters

Ui or Vmax < 42 V dc
Ii or Imax < 22 mA

Uo or Voc = 8.6 V dc
Io or Isc = 40 mA
Po = 350 mW
Co = 43 F
Lo = 28 mH

Uo or Voc = 6.5 V dc
Io or Isc = 110 mA
Po = 0.10 W
Co = 300 F
Lo = 3.7 mH

Uo or Voc = 13 V dc
Io or Isc = 40 mA
Po = 0.35 W
Co = 5.5 F
Lo = 28 mH

Ci = 3 nF
Li = 9.9 H

56

6. 876 Transmitters

MI 611-206 – June 2011

! WARNING
Explosion Hazard - Substitution of components may impair suitability for Class I,
Division 2. Do not disconnect equipment unless power has been switched off or thearea is known to be non-hazardous.
TIP

Risque D’explosion - La substitution de composants peut rendre ce materielinacceptable pour les emplacements de Classe I, Division 2. Avant de deconnecter
l’equipement couper le courant ou s’assurer que l’emplacement est designe nondangereux.
! WARNING
To prevent ignition of flammable or combustible atmospheres, disconnect power
before servicing.
! WARNING
The 876 Transmitter enclosure is made of aluminum alloy. When used in a potentiallyexplosive atmosphere requiring apparatus equipment category 1 G, the 876
Transmitter must be installed so that, even in the event of rare incidents, an ignition
source due to impact or friction between the enclosure and iron/steel is excluded.
! WARNING
The optional storm door (option code -7) and keypad area is nonconducting and may
generate an ignition-capable level of electrostatic charge under certain extreme
conditions. Ensure that the equipment is not installed in a location where it may besubjected to external conditions which might cause a build-up of electrostatic charge
on nonconducting surfaces. Additionally, cleaning of the storm door and keypad area
should only be done with a damp cloth.
! WARNING
Make electrical connection in such a way that the degree of ingress protection on theenclosure remains at least IP66 per IEC 60529 and is suitable for the environment.
! CAUTION
The associated apparatus manufacturer’s installation drawing must be followed when
installing this equipment.
General Notes
1. No revision to drawing without prior CSA approval.
2. Associated apparatus (Barrier) manufacturer’s installation drawings must be followed
when installing this equipment.
3. Associated apparatus (Barrier) must be installed in an enclosure that meets therequirements of ANSI/ISA S82.01.
57

MI 611-206 – June 2011

6. 876 Transmitters

4. The Associated Apparatus (Barrier) must be CSA approved.
5. Control equipment connected to barrier must not use or generate more than 250
Vrms or V dc.
6. Resistance between Intrinsically Safe ground and earth ground must be less than 1.0
ohm.
7. Installation should be in accordance with Canadian Electrical Code.
8. Simple Apparatus or CSA approved sensor should be connected to transmitter’s sensor
terminals.
Simple Apparatus as defined by the CEC is an electrical component or combinationof components of simple construction with well-defined electrical parameters that
does not generate more than 1.5 volts, 100 milliamperes, and 25 milliwatts or
20 microjoules.
9. An approved dust-tight seal is required for Class II and III applications.
Nonincendive Notes:
1. Install per Canadian Electrical Code (CEC).
2. Intrinsic safety barrier not required.
3. Nonincendive field wiring installation
The Nonincendive Field Wiring Circuits Concept allows interconnection ofnonincendive apparatus with associated nonincendive apparatus not specificallyexamined in combination as system when:Vmax > Voc or Vt; Ca > Ci + Ccable; La > Li + Lcable
Nonincendive field wiring enables interconnection of nonincendive field wiring
apparatus with associated nonincendive field wiring apparatus not specificallyexamined in combination as a system under one of the following conditions:a. Current Controlled
Normal operating current controlled or limited by the nonincendive field wiring
apparatus (unlike the requirements for intrinsically safe apparatus Imax of thenonincendive field wiring apparatus need not be greater that the Isc of theassociated nonincendive field wiring apparatus)
Vmax > Voc or Vt; Ca > Ci + Ccable; La > Li + Lcableb. Not Current Controlled
Normal operating voltage or current not controlled or limited by thenonincendive field wiring apparatus
Vmax > Voc or Vt; Imax > Isc or It ; Ca > Ci + Ccable; La > Li + Lcable58

6. 876 Transmitters

MI 611-206 – June 2011

IECEx Entity Approval
NON-HAZARDOUS LOCATIONHAZARDOUS LOCATION+

IECEx Approved
Associated Apparatus

876 Series(Barrier)

Transmitter–

SimpleApparatusor
IECEx Approved
SensorINTRINSICALLY SAFE IECEx Type ia and ic
Ex ia IIC
Ex ic IIC
876 Series Transmitter
Entity Parameters
Ui or Vmax < 30 V dc
Ii or Imax < 110 mA
Pi < 800 mW
Ci = 3 nF
Li = 9.9 H

876PH Sensor Terminal
Entity Parameters
Uo = 8.6 V dc
Io = 40 mA
Po = 350 mW
Co = 0.5 F
Lo = 1.0 mH

876EC Sensor Terminal
Entity Parameters
Uo = 6.5 V dc
Io = 110 mA
Po = 0.10 W
Co = 0.3 F
Lo = 0.1 mH

876CR Sensor Terminal
Entity Parameters
Uo = 13 V dc
Io = 40 mA
Po = 0.35 W
Co = 0.5 F
Lo = 1.0 mH

IECEx Type nL
Ex nL IIC
876 Series Transmitter
Entity Parameters

876PH Sensor Terminal
Entity Parameters

876EC Sensor Terminal
Entity Parameters

876CR Sensor Terminal
Entity Parameters

Ui or Vmax < 42 V dc
Ii or Imax < 22 mA

Uo or Voc = 8.6 V dc
Io or Isc = 40 mA
Po = 350 mW
Co = 43 F
Lo = 28 mH

Uo or Voc = 6.5 V dc
Io or Isc = 110 mA
Po = 0.10 W
Co = 300 F
Lo = 3.7 mH

Uo or Voc = 13 V dc
Io or Isc = 40 mA
Po = 0.35 mW
Co = 5.5 F
Lo = 28 mH

Ci = 3 nF
Li = 9.9 H

59

MI 611-206 – June 2011

6. 876 Transmitters! WARNING
To prevent ignition of flammable or combustible atmospheres, disconnect power
before servicing.
General Notes
1. No revision to drawing without prior FM approval.
2. Associated apparatus (Barrier) manufacturer’s installation drawings must be followed
when installing this equipment.
3. The Associated Apparatus (Barrier) must be IECEx approved.
4. Control equipment connected to barrier must not use or generate more than 250
Vrms or V dc.
5. Resistance between Intrinsically Safe ground and earth ground must be less than 1.0
ohm.
6. Simple Apparatus or IECEx approved sensor should be connected to transmitter’s
sensor terminals.
Simple Apparatus is defined as an electrical component or combination ofcomponents of simple construction with well-defined electrical parameters that does
not generate more than 1.5 volts, 100 milliamperes, and 25 milliwatts, or a passive
component that does not dissipate more than 1.3 watts and is compatible with the
intrinsic safety of the circuit in which it is used.

Transmitter Identification
The data label and agency label are fastened to left side surface of the enclosure. A typical datalabel is shown in Figure 49. A typical agency label is shown in Figure 50.
Refer to the data label to determine the model number, origin code, supply voltage, andmaximum power.

60

6. 876 Transmitters

MI 611-206 – June 2011

MODEL / ST

MODEL

MODEL AND STYLE
ELECTRICAL CLASSIFICATION CODE
SALES ORDER / SERIAL NUMBER (IF APPLICABLE)
PLANT OF MANUFACTURE, DATE, SERIAL NO.
SUPPLY VOLTAGE
POWER CONSUMPTIONMEASUREMENT RANGECOMMUNICATIONSOUTPUT

CERT SPEC

CERT SPECREF NO.
ORIGIN
SUPPLYSUPPLY
POWER
POWER
CALIB
CONFIG CD FUSEOUTPUTCALIBCUST DATA CONFIG CD
ALARM
OUTPUT
CUST DATAREF NOORIGINUSER INFORMATIONINVENSYS PROCESS SYSTEMS INC
FOXBORO, MA 02035 U.S.A.

FOXBORO MA USA

Figure 49. Sample 876 Transmitter Data Label

II 1 G Ex ia IIC T4 Gaoo-20 C ≤ Ta ≤ 60 C FM10ATEX 0026X
II 3 G Ex ic IIC T4 Gcoo-20 C ≤ Ta ≤ 60 C FM10ATEX 0027X
INSTALL PER MI 611-208oo

Ex ia IIC T4 Ga ; -20 C ≤ Ta ≤ 60 Coo
Ex ic IIC T4 Gc ; -20 C ≤ Ta ≤ 60 C
IECEx FMG10.0013XooEx nL IIC T4; -20 C ≤ Ta ≤ 60 C
IECEx FMG10.0014X
INSTALL PER MI 611-206

PERMANENTLY MARK ONE TYPE OF
PROTECTION. ONCE CHOSEN, IT
CAN NOT CHANGE. NOT FOLLOWINGTHESE INSTRUCTIONS WILL JEOPARDIZE
EXPLOSION SAFETY.

WARNING: EXPLOSIVE HAZARD.
DO NOT DISCONNECT EQUIPMENTUNLESS POWER HAS BEEN
SWITCHED OFF OR THE AREA IS
KNOWN TO BE NON-HAZARDOUS.

IP66

Figure 50. Sample Type ia Certified 876 Transmitter Agency Label61

MI 611-206 – June 2011

6. 876 Transmitters

Electrical Certification Rating
The electrical certification information is printed on the agency label. See Figure 50. See Table 16
for additional information.
! WARNING
The type of protection (Type ia or Type ic) is determined at the time of fabricationand the agency label is appropriately marked. Once determined, this certification may
not be changed.
Table 16. Product Safety Specifications
Testing Laboratory, Types ofProtection, and Area Classification
IECEx intrinsically safe for Zone 0
Ex ia IIC
IECEx intrinsically safe for Zone 2
Ex ic IIC

Application Conditions

Electrical
Safety Design
Code

IECEx FMG10.0013X
Temperature Class T4.
-20 < Ta < +60 °C
IECEx FMG10.0014X
Temperature Class T4.
-20 < Ta < +60 °C

DA

DN

NOTE

These transmitters have been designed to meet the electrical safety descriptions
listed in the table above. For detailed information, or status of testing laboratory
approvals/certifications, contact Invensys.
The entity parameters for the supply and output circuit in type of protection Ex ia IIC andEx ic IIC with the following maximum values are:Ui < 30 V
Ii < 110 mA
Pi = < 800 mW
Ci = 3 nF
Li = 9.9 H
The entity parameters for the sensor circuit in type of protection intrinsic safety Ex ia IIC withthe following maximum values are:876EC-..DA-.
876PH-..DA-.
(Terminals
1, 2, 3, 4, 5, 6, 7, 8)(Terminals 1, 2, 2A, 3, 3A, 4, 5,
5A, 6, 7, 8)

62876CR-..DA-.
(Terminals 1, 2, 2A, 3, 4, 5)

Uo = 8.6 V

Uo = 6.5 V

Uo = 13 V

Io = 40 mA

Io = 110 mA

Io = 40 mA

Po = 0.35 W

Po = 0.10 W

Po = 0.35 W

6. 876 Transmitters

MI 611-206 – June 2011

Co = 0.5 F

Co = 0.3 µF

Co = 0.5 µF

Lo = 1 mH

Lo = 0.1 mH

Lo = 1 mH

The entity parameters for the sensor circuit in type of protection Ex ic IIC and Ex nL IIC, withthe following maximum values are:876EC-..DN-.
876PH-..DN-.
(Terminals 1, 2, 2A, 3, 3A, 4, 5, (Terminals 1, 2, 3, 4, 5, 6, 7, 8)
5A, 6, 7, 8)

876CR-..DN-.
(Terminals 1, 2, 2A, 3, 4, 5)

Uo = 8.6 V

Uo = 6.5 V

Uo = 13 V

Io = 40 mA

Io = 110 mA

Io = 40 mA

Po = 0.35 W

Po = 0.10 W

Po = 0.35 W

Co = 43 F

Co = 300 µF

Co = 5.5 µF

Lo = 1 mH

Lo = 3.7 mH

Lo = 28 mH

OUTPUT LOAD (OHMS)

The power supply requirements for a 4 to 20 mA output are 12.5 to 30 V dc for 876 Series
IECEx certified products. See Figure 51.
860
800

MAX LOAD = (V-12.5)/0.0204

700

MIN LOAD WITH
PC-BASEDCONFIGURATOR

600
500

OPERATING
AREA

400
300
200
100
0

NOTE
The transmitter will function with an output load
less than 250 ohms provided that a PC-Basedconfigurator is not connected to it. Connecting a
PC-Based configurator while operating with lessthan a 250 ohm load may cause disturbances
and/or communication problems.

OPERATING
AREA
0

12.5
20
30
SUPPLY VOLTAGE, V dc

Figure 51. Power Supply Requirements

Origin CodeThe origin code identifies the area of manufacture, the year and week of manufacture, and theserial number. See Figure 49. In the example 2B10120526, 2B means the product was
manufactured in the Analytical Division, 10 identifies the year of manufacture as 2010, 12, theweek of manufacture in that year, and 0526 the serial number.

63

MI 611-206 – June 2011

6. 876 Transmitters

Special Warnings! WARNING
The 876 Transmitter enclosure is made of aluminum alloy. When used in a potentiallyexplosive atmosphere requiring apparatus equipment category 1 G, the 876
Transmitter must be installed so that, even in the event of rare incidents, an ignition
source due to impact or friction between the enclosure and iron/steel is excluded.
! WARNING
The optional storm door (option code -7) and keypad area is nonconducting and may
generate an ignition-capable level of electrostatic charge under certain extreme
conditions. Ensure that the equipment is not installed in a location where it may besubjected to external conditions which might cause a build-up of electrostatic charge
on nonconducting surfaces. Additionally, cleaning of the storm door and keypad area
should only be done with a damp cloth.
! WARNING
Make electrical connection in such a way that the degree of ingress protection on theenclosure remains at least IP66 per IEC 60529 and is suitable for the environment.

ISSUE DATESJUN 2000
FEB 2001
OCT 2005
FEB 2006
APR 2006

MAY 2006
NOV 2007
DEC 2008
DEC 2010
JUN 2011

Vertical lines to the right of text or illustrations indicate areas changed at last issue date.
Invensys Operations Management
5601 Granite Parkway Suite 1000
Plano, TX 75024
United States of America
http://www.iom.invensys.com

Global Customer Support
Inside U.S.: 1-866-746-6477
Outside U.S.:1-508-549-2424 or contact
your local Invensys representative.
Website: http://support.ips.invensys.com

Invensys and Foxboro, are trademarks of Invensys plc, its
subsidiaries, and affiliates.
All other brand names may be trademarks of theirrespective owners.

Copyright 2000-2011 Invensys Systems, Inc.
All rights reserved
MB 1230611