H34.0.01.6C-11
Operating Manual GMH 3430
page 8 of 10
12 The Conductivity Measuring Cell
During the measurement, the conductivity measuring cell must be dipped into so far, that at least 30mm beginning
from the top of the measuring cell, is located in the medium.
The maximum immersion depth for continuous operation should be 110mm.
The measuring cell can either be stored dry or in water. After dry storage wetting time will be prolonged slightly. If
changing over from one liquid to another with conductivities varying widely make sure to properly rinse and shake
dry measuring cell.
Measuring cell must never come into contact with water-repellent materials such as oil or silicone.
If conductivity measured is much higher or lower than expected this may be due to the electrode being soiled with
nonconducting or conducting foreign materials. Measuring cell has to be cleaned with a watery soap solution.
When measuring media with low conductivities the electrode has to be moved sufficiently.
13 Error And System Messages
Error or system
messages:
Description / Reason:
Remedy:
Low battery voltage
device will only continue operation for
a short time
replace battery
Low battery voltage
replace battery
- If mains operation: wrong voltage
replace power supply, if fault continues to exist:
device damaged
No display
or
mazy characters
- Battery voltage too low
replace battery
- If mains op.: power supply defective
or wrong voltage/polarity
check/replace mains supply
- System error
disconnect battery or power supply, wait for a
short time, re-connect
- Device defective
return to manufacturer for repair
Values exceeding measuring range
Check: are there any values exceeding the
measuring range specified?
-> meas. device not suitable
Electrode/sensor/cable defective
-> replace electrode/probe
Values below measuring range
check: are there any values below the measur-
ing range specified?
-> meas. device not suitable
Electrode/sensor/cable defective
-> replace electrode/probe
System fault
Disconnect battery, wait for 10 sec., switch on
again: if fault continues to exist, device is dam-
aged
-> return to manufacturer for repair
Value could not be calculated
A measuring variable device required for calcu-
lation is faulty (overflow/underflow)
30 mm
110 mm
