8 Troubleshooting
OxyMax W COS 71
22
Hauser
8.2
Sensor test
"
Caution!
Only authorised and trained personnel may test the sensor.
You will also require a multimeter (voltage, resistance).
Then carry out the following to test the sensor:
!
Note!
If there are deviations from the reference values, follow the troubleshooting instructions
or contact your E+H sales office.
8.3
Spare parts
•
Replacement cartridge COY 31S-WP for fast response time
2 preterminated spare replacement cartridges with pretensioned membrane;
Order No. 51506977
•
Sealing ring COY 31-OR
3 pieces; Order No. 51506985
Test
Measure
Setpoint
Voltage inspection
With the sensor connected,
test the polarisation voltage with:
– Liquisys M COM 223/253-WX/WS
– 8,5 V between terminals 87 and 0
+ 8,5 V between terminals 88 and 0
Slope inspection
Place the sensor in the air, and dry the
membrane with a paper towel
After 10 minutes, the measured value
display should display approx. 102%
SAT (display by 4 times
O
-key).
Zero point inspection
Immerse the sensor in zero solution
(see "Accessories" page 20).
Wait for 60 minutes (consumption of
the residue of oxygen in the sensor).
Open the measuring chamber and dry
the electrodes
Display near to 0 mg/l (0% Sat)
Display near to 0 mg/l (0% Sat)
Temperature sensor
check
Disconnect the sensor and measure
the resistance between the TOP 68
pins 3 and 4 or between the SXP pins
3 and 4 (fixed cable version)
depending on
temperature:
5°C
10°C
15°C
20°C
25°C
30°C
74.4 k
Ω
58.7 k
Ω
46.7 k
Ω
37.3 k
Ω
30.0 k
Ω
24.3 k
Ω
Summary of Contents for OxyMax W COS 71
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