Technical Information

EZ-TOC II analyzer CA52TOC
Analyzer for continuous real-time TOC measurement in water andwastewater

Application• Monitoring of organic carbon in water and wastewater• Industrial processes• Monitoring of sewage treatment plant outlet• Monitoring of source and drinking water• Control of methanol dosage
Your benefits• Measurements down to 50 ppb• Correlation to COD is possible• Measurement of grab samples is possible• Two-channel-version available• Effective self monitoring - follows ISO and EPA approved
methods

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Function and system design
Measuring principle

Liquid circuit
The sample is drawn by a fast-loop system with a coarse, self-cleaning filter. A small quantity is drawn off andphosphoric or nitric acid is added before sent through a scrubber. Inorganic carbon is now eliminated as CO2.
The stripping process also eliminates any volatile substances. The sample is then combined with sodium
persulphate and transferred to the reactor, where the organic substances in solution are further oxidized withUV-irradiation at about 75 °C (170 °F).
Gas circuit
The carrier gas used is CO2-free air, nitrogen or oxygen. The carbon dioxide generated in the reactor in thepresence of moisture is pass along through a condenser for drying and then transferred to the measurement
cell. The cell is flushed with carrier gas to zero the measurement and compensate for any residual CO2, water
vapor or other contaminants.
Measurement/calibration
Measurement is performed by determining non-dispersive infra red absorption (NDIR) of the produced
CO2-gas. The calibration functions may be programmed at two points with a reference liquid or gas and aself-cleaning function.

Measuring system
12345a0008041

Measuring system when air supply is unstable
123452EZ-TOC II analyzer CA52TOC
Pressure regulator
CO2 scrubber
Pressure regulator
Air reservoir > 5 l (> 1.3 US gal)

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EZ-TOC II CA52TOC

1234a0008042

Measuring system when air supply is stable
1234EZ-TOC II analyzer CA52TOC
Pressure regulator
CO2 scrubber
Stable air supply (or bottle) > 6 bar (> 87 psi)

Input
Measured variables
Measuring range

TOC or TCVersionMeasuring range

A0.015 to 10 mg TOC / l

B

0.1 to 100 mg TOC / l

C0.5 to 500 mg TOC / l

D

10 to 1000 mg TOC / l

E50 to 5000 mg TOC / l

F

100 to 10000 mg TOC / l

OutputCurrent range

0/4 to 20 mAInterface

RS 232 - unidirectional

Alarm

Two programmable alarm levels per channel with up to 8 programmable type C relays
Type C relay: SPDT switch, isolated contacts; each contact is rated at 0.5 A @ 24 V DC / 230 V AC.
Relay board with 4 relays is part of the system.

Programmable outputs

Up to 8 customer-programmable outputs on type C relays. Can be programmed to output any combination ofmultiple system parameters (including the four alarms).

Display

4-line, 20 characters per line, backlit liquid crystal display (LCD)

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EZ-TOC II CA52TOC

Power supply
Electrical connection

Fuses

115 V AC ±10%, 50/60 Hz, 2 Amperes, 230 VA
230 V AC ±10%, 50/60 Hz, 1 Ampere, 230 VA
The unit should have its own dedicated, unswitched circuit.
Supply voltage

Fuses

230 V AC2 x microfuse 1.25 A, 250 V, slow-blow

115 V AC

1 x microfuse 3.0 A, 250 V, slow-blow

Performance characteristic
Accuracy±1.5 % for TOC concentrations ranging from 0 to 75 % of full scale±2.5 % for TOC concentrations ranging from 75 to 100 % of full scale

Response timeLess than 8 minutes to t90 at 100 mg/l configuration TOC

Repeatability±1 % of full scale.

Drift±1 % of full scale over 72 hours without calibration at 20 °C (68 °F).

Temperature stabilityLess than 2% of full-scale drift over ambient range of 10 to 30 °C (50 to 86 °F).

Inorganic carbon removal≥ 95 %, when using standard TIC scrubber.
≥ 98 %, when using ultra TIC scrubber.

Installation conditions
Compressed air

The compressed air (used as a carrier gas) must be dry and must meet the following specifications:• < 3 ppm CO2• < 3 ppm hydrocarbon• Constant pressure 2 bar (29 psi).
• Consumption 500 to 750 cm3/min• The in-house compressed air supply must be equipped with a CO2 scrubber (input pressure 4.0 to 10 bar(58 to 145 psi)) and a pressure reducing valve.
Bottled air, nitrogen or oxygen can also be used as a carrier gas.

ExhaustInside of buildings an exhaust is required. No accumulation of halogens or other vapors is allowed in this area.

Drain

Gravity drain, vented to atmosphere. Use a drain pipe made out of plastic or rubber.

Environment
Ambient temperature> 0 to 40 °C (> 32 to 104 °F)

Humiditymax. 90 %Ingress protection

IP 54

Storage conditions

Store in dry rooms only. Use appropriate packaging to store.

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EZ-TOC II CA52TOC

Process
Medium inlet pressure

Unpressurized; low overpressure of max 0.2 bar (2.9 psi) is permissible.

Medium outlet pressure

Unpressurized exhaust

Suspended solids

For particle sizes ≥ 200 μm, an appropriate sample preparation (e.g. PA-2 or PA-3) is required. 3 % maximum
concentration of suspended solids by volume.

Flow volume

Max. 50 ml/min at 60 Hz

Reagents

1.5 M Na2S2O8 (sodium persulfate), 10% (v/v) H3PO4 (phosphoric acid) or 5% HNO3 (nitric acid), each indeionized water.
Consumption: 19.7 l (5.2 US gal) / month each

Mechanical construction
Dimensions

558.9 (22.00)
529.7 (20.85)
508 (20.00)

841.9 (33.14)
802 (31.57)
762 (30.00)

663 (26.10)
610 (24.00)
572 (22.50)

365.4 (14.39)
369.2 (14.54)

Æ 9.53 (.375)
305 (12.00)

mm (inch)a0008101

Dimensions

Weightapprox. 73 kg (160 lbs)

Housing

IP 54

Certificates and approvals
4 symbolEndress+Hauser

Declaration of conformity
The product meets the requirements of the harmonized European standards. It thus complies with the legal
requirements of the EC directives.
The manufacturer confirms successful testing of the product by affixing the 4 symbol.

5EZ-TOC II CA52TOC

Ordering information
Product structure

Measuring range
ABCDEFY

0.015 to 10 mg/l TOC
0.1 to 100 mg/l TOC (not with CA52TOC-**C****)
0.5 to 500 mg/l TOC (not with CA52TOC-**C****)
10 to 1000 mg/l TOC (not with CA52TOC-**C****)
50 to 5000 mg/l TOC (not with CA52TOC-**C****)
100 to 10000 mg/l TOC (not with CA52TOC-**C****)
Special version according to customer specification

Sample transfer
1
2

1 measuring point (not with CA52TOC-****D**; CA52TOC-****E**)
2 measuring points

TIC removalABCYStandardHighUltra high (only with CA52TOC-A******)
Special version according to customer specification

Power supply01

230 VAC, 50/60 Hz
115 VAC, 50/60 Hz

Sample preparation
ABCDEYNot selected
1 x PA-2 PVC, 1 to 8 m3/h (4.4 to 35 gpm) wastewater
1 x PA-3 PVC, 0.1 to 1.0 m3/h (0.4 to 4.4 gpm) wastewater
2 x PA-2 PVC, 1 to 8 m3/h (4.4 to 35 gpm) wastewater (not withCA52TOC-*1*****)
2 x PA-3 PVC, 0.1 to 1.0 m3/h (0.4 to 4.4 gpm) wastewater (not withCA52TOC-*1*****)
Special version according to customer specification

Carrier gas0129To order separately
CO2 scrubber
CO2 scrubber + compressor
Special version according to customer specification

Output
ACA52TOC-Sample processor

60/4 to 20 mA + RS 232 unidirectional
Complete order code

For detailed information please see:
Sample processor

Documentation number

PA-2

20807601EB

PA-3

20807605EB

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EZ-TOC II CA52TOC

Accessories
Maintenance kits

90 / 180 day maintenance kit• Includes the tubing for all pump head sizes• Order number: 71092036
Set of service parts for annual maintenance PA-2
• Order number: 71013847
Set of service parts for annual maintenance PA-3
• Order number: 71013848
PA-2 piping without solenoids• Order number: 71093894
PA-3 piping without solenoids• Order number: 71093895
Solenoids for PA-2/PA-3, 115V AC• Order number: 71093896
Solenoids for PA-2/PA-3, 230V AC• Order number: 71093897
Carrier gas generator• Order number 115 V AC: 71092115• Order number 230 V AC: 71092116

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Instruments International
Endress+Hauser
Instruments International AGKaegenstrasse 24153 Reinach
Switzerland
Tel.+41 61 715 81 00
Fax+41 61 715 25 00
www.endress.com
info@ii.endress.com

TI424C/07/en/06.09
71060850
Printed in Germany / FM+SGML 6.0 / DT