Optek CONTROL 200, Инструкция по эксплуатации

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C200 S
OFTWARE
Instruction Manual C200 Part2 A1.doc
optek Danulat GmbH • D-45356 Essen • Germany page 103
7.2 Fault Indication conductivity
7.2.1 Error Messages
If erroneous or unexpected results are obtained the fault may be indicated in the Operating Page by an error message.
However, some faults may cause problems with analyzer calibration or give discrepancies when compared with
independent laboratory measurements.
7.2.2 No Response to Conductivity Changes
The majority of problems are associated with the conductivity cell which must be cleaned as an initial check. It is also
important that all program parameters have been set correctly and have not been altered inadvertently – see Section 5.
If the above checks do not resolve the fault:
a) Check the analyzer responds to a resistance input.
Disconnect the conductivity cell cable and connect a
suitable resistance box directly to the analyzer input –
see Section 6.2.2. Select the CONFIG. SENSORS
page and and set Temp.Comp. to None – see Section
5.2.3. Check the analyzer displays the correct values as
set on the resistance box – see Table or use the
expression:
G
10 K
R
6
×
=
Where: R = resistance
K = cell constant 0.5 for TB4 Group A cells
0.05 for TB4 Group B cells
1.0 for AC400 cells
G = conductivity (µS/cm)
Failure to respond to the input indicates a fault with the analyzer which must be returned to the Company for repair. A
response, but with incorrect readings, usually indicates an electrical calibration problem. Re-calibrate the analyzer as
detailed in Section 6.
b) If the response in a) is correct, reconnect the conductivity cell cable and connect the resistance box to the cell end.
Check the analyzer displays the correct values as set on the resistance box in this configuration.
If the analyzer passes check a) but fails check b), check the cable connections and condition. If the response for both
checks is correct, replace the conductivity cell.