XA02914C/07/EN/01.22-00
71586506
2022-09-30

Products

Solutions

Services

Safety Instructions
OUSAF12, OUSAF21, OUSAF22,OUSAF44, OUSAF46, OUSTF10
Process photometer sensors
UK Ex II 2G Ex db IIC T5 Gb

0OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10

XA02914C

OUSAF12, OUSAF21, OUSAF22, OUSAF44,
OUSAF46, OUSTF10
Process photometer sensors
Table of contents
Associated documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Supplementary documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4Certificates and declarations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Specific conditions of use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Temperature class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Endress+Hauser

3

XA02914C

Associated documentation

OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10

This document is an integral part of the following Operating Instructions:• Operating Instructions OUSAF12, BA00497C• Operating Instructions OUSAF21, BA00471C• Operating Instructions OUSAF22, BA00472C• Operating Instructions OUSAF44, BA00416C• Operating Instructions OUSAF46, BA01349C• Operating Instructions OUSTF10, BA00500C

Competence Brochure CP00021Z• Explosion Protection: Guidelines and General Principles• www.endress.com

Supplementary
documentation

Certificates and declarations

EXP-1 Lamp: CSAE 23UKEX1015X

Identification

The nameplate provides you with the following information on your device:• Manufacturer identification• Extended order code
• Serial number• Safety information and warnings• Ex marking on hazardous area versions‣ Compare the information on the nameplate with the order.
Type code
TypeVersionOUSAF12OUSAF22OUSTF10-

010 1)

020 2)

030 3)

040 4)

050 5)

*
*
*

*
*
*

A/B/C/D
C/DB

44
4

*
*
*

No Ex-relevance
1)
2)
3)
4)
5)

Version1)

2)

3)

030

040 4)

*

*

C/D

4

010

OUSAF21-020

No Exrelevance4

No Ex-relevance

Wavelength
Calibration
Lamp
Lamp approval
AssemblyType1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)

For use in hazardous areas II 2G Ex db IIC T5 Gb

For use in hazardous areas
II 2G Ex db IIC T5 Gb

050

5)

0606)

0707)

0808)

0909)

10010)

11011)

12012)*No Ex-relevance

Wavelength combination
Calibration/Validation
Lamp
Lamp approval
Process connection
Nominal diameter
Optical pathlength
Window material
Sealing material
Air purge
Certificate
Options

Endress+Hauser

OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10

TypeVersion

OUSAF44OUSAF46

010 1)

020 2)

030 3)

040 4)

**

*
*

EE*
*

For use in hazardous areas II 2G Ex db IIC T5 Gb

No Ex-relevanceNo Ex-relevance
1)
2)
3)
4)

XA02914C

WavelengthCalibration/Validation
Lamp approval
Assembly

Certificates and approvals
Declaration of Conformity
With this declaration of conformity, the manufacturer guarantees that the product conforms to UK
statutory requirements:• The Electromagnetic Compatibility Regulations SI 2016 No. 1091
• The Equipment and Protective Systems Intended for use in Potentially Explosive AtmosphereRegulations SI 2016 No. 1107
• The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment
Regulations SI 2012 No. 3032
Compliance is verified by adherence to the standards listed in the Declaration of Conformity.
Hazardous area approvals
UK II 2G Ex db IIC T5 Gb
Approved Body
EXP-1 Lamp: CSA Group Testing UK Ltd

Safety instructions

Endress+Hauser

The process photometer measuring point, consisting of the certified process photometers OUSAF12,
OUSAF21, OUSAF22, OUSAF44, OUSAF46 or OUSTF10 and measuring cable CUK80 may only beconnected to the CM44P transmitter via the certified safety barrier MTL7760 ac.
• The electrical connection must be established as illustrated in the relevant control drawings in thisdocument and the installation instructions in the Operating Instructions for the process
photometer.
• The process photometers may be used in environments that contain flammable gases and vapors
and are assigned to apparatus groups IIA, IIB, IIC, temperature class T5.
• Installation must be performed by trained personnel in compliance with applicable standards andguidelines, e.g. IEC/EN 60079-14 or ANSI/NFPA-70 and as specified in the Operating Instructions
for the particular process photometer and the transmitter to be connected.
• Inspection and maintenance of this equipment shall be carried out by suitably trained personnel inaccordance with the applicable code of practice e.g. EN 60079-17.
• Sensor repairs must be performed by trained personnel in compliance with applicable standards
and guidelines, e.g. IEC/EN 60079-19 and as specified in the sensor's Operating Instructions andthe Operating Instructions for the transmitter to be connected.
• Component parts which are installed as accessories or replacement parts in these process
photometers must be mounted by trained personnel in compliance with the manufacturer'sdocumentation.
• If the process photometer can come into contact with aggressive substances, the user must takesuitable protective measures to ensure that the confirmed level of protection of the measuringsystem is not compromised. Examples of aggressive substances include acidic liquids or gases that
corrode metal, or solvents that can damage polymeric materials. Suitable protective measuresinvolve regular checks as part of routine inspections, or checks to verify the resistance of thematerials to special chemicals using the material data sheet.
• The optical receiver with photodiodes is operated in the current mode. The photodiodes generateenergy below the voltage, current and power limits that are specified in IEC/EN 60079-11, Section
5.7. Therefore the equipment is categorized as a simple apparatus.
• The process photometers are assigned to temperature class T5, which permits a maximum surface
temperature of 100 °C (212 °F).

5

XA02914C

OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10• One or two approved safety barriers MTL7760 ac are used to separate the safe area from the areaclassified as hazardous. The safety barrier must be connected as illustrated in the relevant control
drawings in this document and the installation instructions in the Operating Instructions for theprocess photometer.
• The approved safety barriers and the CM44P transmitter may not be installed in the hazardousenvironment.
• The explosions-protected lamp EXP-1 has been developed and manufactured according to SI 2016
No. 1107 and also complies with the following standards:• EN 60079-0 Electrical apparatus for explosive gas atmospheres• EN 60079-1 Explosive atmospheres. Equipment protection by flameproof enclosures "d"• The CUK80 measuring cable must be protected against electrostatic charge.
• The OUA260/CUA261 flow assemblies may only be used in the hazardous area with stainlesssteel adapters.

Specific conditions of use• The explosion-protected lamp EXP-1 must cool down before the housing is opened. Afterswitching off the power supply, first wait for 5 minutes before you open the photometer housing.
• The explosion-protected lamp EXP-1 must be installed in such a way that the front window isprotected against mechanical damage.
• The explosion-protected lamp EXP-1 has a permanently connected cable end which must beconnected to an external circuit according to the instructions in these Safety Instructions and theinstallation instructions in the Operating Instructions for the process photometer.
• In accordance with clause 7.5 of EN IEC 60079-0:2018, the equipment must be connected toground and the resistance shall not exceed 109 Ω.

Temperature class

Photometer Process temperature

Ambient temperature

OUSAF12-20 to 40 °C (0 to 100 °F) T5 ≤ 100 °C (≤ 212 °F)

OUSAF21

0 to 90 °C (32 °F to 190 °F) (continuousoperation)
max. 130 °C (266 °F), for max. 2 hTemperature class

OUSAF22
OUSAF44
OUSAF46
OUSTF10If the specified process temperatures are complied with, temperatures that are not permitted for therespective temperature class will not occur on the equipment.

6Endress+Hauser

OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10

Installation conditions

OUSAF12Zone 0Zone 1Zone 2

19II 1G

XA02914C

28345467II 2G

II 3GA0053695

1123456789Control Drawing CM44P with OUSAF12
UKCA approved EXP-1 lamp
Flow assembly OUA260 or CUA261
Intrinsic safe optical detector
CUK80 cable set, conduit or armored cableMTL7760AC intrinsic safety barrier (supplied with CUK80 cable set, attach to earth ground)
Liquiline CM44P
Certified Ex db IIC Gb junction box, suitably for UKCA (supplied by customer, attach to earth ground)
Certified Ex db IIC Gb cable gland, suitably for UKCA (supplied by customer)
Steel braided power cable (integrated in EXP-1 lamp)

Endress+Hauser

7

XA02914C

OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10

OUSAF21, OUSAF22, OUSTF10

Zone 0Zone 1Zone 2A12a35B19II 1G2b834467II 2G

5II 3GA0053718

2A
B12a2b34567898Control Drawing CM44P with OUSAF21, OUSAF22, OUSTF10
Sensor OUSAF21
Sensor OUSAF22 or OUSTF10
UKCA approved EXP-1 lamp
Flow assembly of OUSAF21 sensor
Flow assembly OUA260 or CUA261
Intrinsic safe optical detector
CUK80 cable set, conduit or armored cable
MTL7760AC intrinsic safety barriers (2 needed, supplied with CUK80 cable set, attach to earth ground)
Liquiline CM44P
Certified Ex db IIC Gb junction box, suitably for UKCA (supplied by customer, attach to earth ground)
Certified Ex db IIC Gb cable gland, suitably for UKCA (supplied by customer)
Steel braided power cable (integrated in EXP-1 lamp)

Endress+Hauser

OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10

XA02914C

OUSAF44

Zone 0Zone 1Zone 219II 1G2834567II 2G

4II 3GA0053719

3123456789

Control Drawing CM44P with OUSAF44
UKCA approved EXP-1 lamp
Flow assembly OUA260 or CUA261
Intrinsic safe optical detector
CUK80 cable set, conduit or armored cable
MTL7760AC intrinsic safety barriers (supplied with CUK80 cable set, attach to earth ground)
Liquiline CM44P
Certified Ex db IIC Gb junction box, suitably for UKCA (supplied by customer, attach to earth ground)
Certified Ex db IIC Gb cable gland, suitably for UKCA (supplied by customer)
Steel braided power cable (integrated in EXP-1 lamp)

Endress+Hauser

9

XA02914C

OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10

OUSAF46

Zone 0Zone 1

Zone 2519II 1G2834467II 2G

5II 3GA0053720

412345678910Control Drawing CM44P with OUSAF46
UKCA approved EXP-1 lamp
Flow assembly OUA260 or CUA261
Intrinsic safe optical detector
CUK80 cable set, conduit or armored cable
MTL7760AC intrinsic safety barriers (2 needed, supplied with CUK80 cable set, attach to earth ground)
Liquiline CM44P
Certified Ex db IIC Gb junction box, suitably for UKCA (supplied by customer, attach to earth ground)
Certified Ex db IIC Gb cable gland, suitably for UKCA (supplied by customer)
Steel braided power cable (integrated in EXP-1 lamp)

Endress+Hauser

*71586506*71586506