JUMO tecLine ClO2 User manual

JUMO tecLine ClO2 / JUMO tecLine O3
Sensors for chlorine dioxide and ozone
Type 202634/45, type 202634/46
type 202634/50, type 202634/51
B 202634.0
Operating manual
2012-07-13/00585740

Screws coated with threadlocking paint must not be adjusted! The
threadlocking paint must not be damaged. If it is, claims under the
warranty will not be honored!

Contents
1 Typographical conventions ...................................................... 5
1.1 Warning signs ..............................................................................................5
1.2 Note signs ....................................................................................................5
2 General ....................................................................................... 6
2.1 Preface .........................................................................................................6
2.2 Scope of application ....................................................................................6
2.3 Output signal ................................................................................................6
3 Device identification ................................................................. 7
3.1 Nameplate ....................................................................................................7
3.2 Order details .................................................................................................7
4 Description ................................................................................ 8
4.1 Scope of delivery .........................................................................................8
4.2 Sensor for chlorine dioxide - type 202634/45 ..............................................8
4.3 Sensor for chlorine dioxide - type 202634/46
(resistant to chemicals and surfactants) ......................................................8
4.4 Sensor for ozone - type 202634/50 .............................................................8
4.5 Sensor for ozone - type 202634/51
(resistant to chemicals and surfactants) ......................................................9
4.6 Details ..........................................................................................................9
4.7 Technical data ............................................................................................11
5 Mounting .................................................................................. 13
5.1 Notes ..........................................................................................................13
5.2 Flow-through fitting (part no. 00392611) ...................................................14
5.3 Flow monitoring .........................................................................................16
6 Electrical connection .............................................................. 17
6.1 Sensor for chlorine dioxide or ozone .........................................................17
6.2 Flow monitor ..............................................................................................18
6.3 Example of a measurement section ...........................................................19
7 Startup ..................................................................................... 21
7.1 Screwing the membrane cap off and on ....................................................21
7.2 Topping up reference electrolyte ...............................................................21

Contents
8 Maintenance ............................................................................ 27
8.1 Cleaning the electrode finger tip / replacing the membrane cap and
electrolyte ...................................................................................................27
8.2 Remove scale that has accumulated on the membrane cap ....................28
8.3 Storage / transport .....................................................................................28
8.4 Consumables / accessories .......................................................................29
9 Calibration ............................................................................... 30
9.1 General .......................................................................................................30
9.2 Calibration with a indicator/control instrument ..........................................30
10 Eliminating errors and faults .................................................. 32

5
1 Typographical conventions
1.1 Warning signs
1.2 Note signs
Caution
This sign is used when there may be danger to personnel if the instructions
are ignored or not followed correctly!
Attention
This sign is used when there may be damage to equipment or data if the
instructions are ignored or not followed correctly!
Note
This sign is used to draw your attention to something of special importance.
abc1Footnote
Footnotes are remarks that refer to specific points in the text. Footnotes
consist of two parts:
Identification marking in the text and the footnote text.
The identification markings in the text are arranged as sequential superscript
numbers.
✱Action instruction
This sign indicates that an action to be performed is described.
The individual steps are marked by this asterisk.
Example:
✱Press key.

6
2 General
2.1 Preface
Please read this operating manual before placing the device in operation.
Keep the operating manual in a place which is accessible to all users at all
times.
2.2 Scope of application
These membrane-covered, amperometric sensors are used to measure the
concentration of chlorine dioxide and ozone (for example in drinking and
swimming water, industrial, process and cooling water).
The sensor for chlorine dioxide can be used to measure chlorine dioxide from
chlorite / chlorine and chlorite / hydrochloric acid plants.
The sensor for ozone can be used for example to measure electrolytically
generated ozone.
The sensors are not suitable for detecting the absence of chlorine dioxide and
ozone.
The integrated electronics of the sensors provides a temperature-
compensated current signal of 4 to 20mA. A downstream device (indicator,
controller, recorder, PLC, etc.) is used for calibration.
2.3 Output signal
Since the measurement signal of amperometric sensors is temperature-
dependent, an integrated NTC resistor is provided for automatic temperature
compensation. The recommended temperature ranges are as follow
- For sensors of types 202634/45 and 202634/50): +5 to +45 °C.
- For sensors of types 202634/46 and 202634/51): +5 to +50 °C.
The integrated electronics of the sensors provides a current signal of 4 to
20 mA.
A downstream device (indicator, controller, recorder, PLC, etc.) is used for
calibration.
The sensors can be connected directly to a suitable indicator and controller.
The JUMO AQUIS 500 AS indicator/controller (type sheet 202568) and the
JUMO dTRANS AS 02 indicator/controller (type sheet 202553) are especially
suitable for combining with these sensors. They provide the voltage required
for the power supply of the sensor and make for an easy way to calibrate the
measuring system.
Danger:
Sudden failure of the sensor may result in dangerous overdosing of chlorine
dioxide or ozone. Suitable preventive measures must be in place as needed to
prevent this from happening.
Check the plant for odor of chlorine dioxide or ozone and check water for any
unusual discoloration.

7
3 Device identification
3.1 Nameplate
3.2 Order details
Sensor for chlorine dioxide
Type: 202634/45-20
Measuring range: 0.00 to 2.00 mg/l
F No. 00000000 00 0 1226 0005
Serial No.: 01 01 0002
JUMO tecLine ClO2
JUMO GmbH & Co. KG
Fulda, Germany
www.jumo.net
Note:
The date of manufacture is encoded in the "F No." (manufacturing number):
1226 signifies: year of manufacture 2012 / calendar week 26.
(1) Basic type
202634 Sensor
(2) Basic type extension
45 for chlorine dioxide
46 for chlorine dioxide (resistant to chemicals and surfactants)
50 for ozone
51 for ozone (resistant to chemicals and surfactants)
(3) Measuring range
o o 10 0.00 to 0.50 mg/l (ppm)
oooo 20 0.00to2.00mg/l(ppm)
25 0.00 to 5.00 mg/l (ppm)
35 0.00 to 10.00 mg/l (ppm)
o o 37 0.00 to 20.00 mg/l (ppm)
(1) (2) (3)
Order code /-
Order example 202634 / 45 - 20

8
4 Description
4.1 Scope of delivery
Two-wire sensor with membrane cap, electrolyte and special abrasive paper
for cleaning the electrode finger.
4.2 Sensor for chlorine dioxide - type 202634/45
This sensor features a membrane-covered, amperometric 2-electrode
measuring system.
The membrane of this sensor is made of hydrophobic, microporous PTFE
material. These sensors should only be used in water with drinking or
swimming pool quality. The water should not under any circumstances contain
surfactants (many cleaning agents and disinfectants contain surfactants).
Surfactants will eliminate the hydrophobic properties of the membrane. Then
proper functioning can no longer be guaranteed.
The membrane cap that seals off the electrode space is filled with an aqueous
electrolyte containing alkali halides.
The working electrode (cathode) is made of gold (Au). The anode, which
performs the function of a combined reference electrode and counter
electrode, is made of silver (Ag) fitted with a coating of silver halide (AgHal).
The sensor for chlorine dioxide can be used to measure chlorine dioxide from
chlorite/chlorine and chlorite/hydrochloric acid plants.
4.3 Sensor for chlorine dioxide - type 202634/46
(resistant to chemicals and surfactants)
The sensor measures chlorine dioxide from chlorite/chlorine plants and
chlorite/hydrochloric acid plants.
4.4 Sensor for ozone - type 202634/50
This sensor features a membrane-covered, amperometric 2-electrode
measuring system.
The membrane of these sensors is made of hydrophobic, microporous PTFE
material. This sensor should only be used in water with drinking or swimming
pool quality. The water should not under any circumstances contain
surfactants (many cleaning agents and disinfectants contain surfactants).
Surfactants will eliminate the hydrophobic properties of the membrane. Then
proper functioning can no longer be guaranteed.
The membrane cap that seals off the electrode space is filled with an aqueous
electrolyte containing alkali chlorides.
The working electrode (cathode) is made of gold (Au). The anode, which
performs the function of a combined reference electrode and counter
electrode, is made of silver (Ag) fitted with a coating of silver halide (AgHal).
The sensor for ozone can be used to measure electrolytically generated
ozone.

9
4 Description
4.5 Sensor for ozone - type 202634/51
(resistant to chemicals and surfactants)
This sensor measures ozone, for example electrolytically generated ozone
(O3). This sturdy sensor can be used in all water qualities.
4.6 Details
4.6.1 Types 202634/45 and 202634/50
(1) Pg screw connection
(2) Cover
(3) O-ring
(4) 2-pin terminal for measuring cable connection
(5) Electrode shaft with integrated electronics
(6) O-ring
(7) Electrode finger (reference electrode)
(8) Measurement electrode
(9) Transparent cover
(10) Membrane cap
(11) PTFE membrane
(12) Valve opening
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)

4 Description
10
4.6.2 Types 202634/46 and 202634/51
Attention:
- This measurement is only possible in a suitable flow-through fitting
(part no. 00392611).
- The process medium must be similar in quality to drinking or swimming
pool water.
- The sample medium must not contain any surfactants (surface-active
substances, for example those in cleaning agents, detergents and
disinfectants).
- The process medium must not contain any hydrophobic substances
(for example oils and greases).
(1) Pg screw connection
(2) Cover
(3) O-ring
(4) 2-pin terminal for measuring cable connection
(5) Electrode shaft with integrated electronics
(6) Counter electrode (stainless steel)
(7) O-ring
(8) Electrode finger (reference electrode)
(9) Measurement electrode
(10) Transparent cover
(11) Membrane cap
(12) Membrane holder (stainless steel)
(13) Membrane
(14) Valve opening
(1)
(2)
(3)
(4)
(5)
(7)
(8)
(9)
(10)
(11)
(13)
(14)
(12)
(6)