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5 MAINTENANCE
5.1 Storing and Cleaning of the Electrode
Graphite and stainless steel conductivity measuring cells do not require any special mainte-
nance. However, the electrodes must always be kept in clean condition. In case of conta-
mination, they can easily be cleaned with slightly acidic solutions or solvents. Before use
or during extended measuring interruptions (several weeks) the graphite measuring cells
should always be kept wet in order to shorten the rise time and avoid fractures on the elec-
trode surface. While cleaning the HOLD function can be activated, allowing the process to
continue.
Torque for electrode installation 2N.m
5.2 Trouble-shooting guide
The following messages can be displayed at start-up of the device after a power supply
failure:
- "ERROR 3" indicates that the value to be displayed in the main menu has not been
memorized; Press ENTER: the device displays the measured conductivity.
- "ERROR 4" indicates that the calibration data has been lost. Press ENTER: the device
displays the measured conductivity but it operates with the factory settings (see § 5.3).
The transmitter will need recalibrating. If this message appears persistently, please
return the device to the factory.
- "ERROR 5" indicates that the value to be displayed in the main menu has not been
memorized and that the calibration data has been lost. Press ENTER: the device
displays the measured conductivity but it operates with the factory settings (see § 5.3).
The transmitter will need recalibrating. If this message appears persistently, please
return the device to the factory.
5.3 Factory-settings of 8225 at Delivery
Language:
Unit of conductivity:
Unit of temperature:
Decimal points:
Cell constant:
Temperature compensation
coefficient:
Current:
4 mA:
20 mA:
User settings of 8225 Transmitter N°:
Language:
Unit of conductivity:
Unit of temperature:
Decimal points:
Cell constant:
T°C coefficient:
Current:
4 mA:
20 mA:
English
Relay:
µS/cm
°C
2
01.0000
00.00 %/ °C
Filter:
00.00
00.00
Relay:
Filter:
E-42-
CONDUCTIVITY 8225
1-:
00.00
1+:
00.00
2-:
00.00
2+:
00.00
DEL1:
000
DEL2:
000
Filter 2
1-:
1+:
Inverted:
2-:
2+:
Inverted:
DEL1:
DEL2:
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