54
LRGT 1x-x - Installation & Operating Manual -
819877-00
Cleaning the measuring electrodes of the conductivity transmitter
Monthly comparison of readings
In accordance with the recommendations from standards DIN EN12952/12953 for the monitoring of
equipment to protect water quality, a qualified and expert person must compare readings with reliable
samples once a month.
In the event of discrepancies, the conductivity transmitter must be calibrated using the “
CAL
” function,
see page 41.
Cleaning interval
We recommend cleaning the electrode at least once a year, such as during maintenance work, depending
on the operating conditions.
Before cleaning the measuring electrode(s), take the conductivity transmitter out of service and
remove it, see page 53.
LRGT 16-3, LRGT 17-3
1.
Slacken the threaded pin
I
and manually unscrew the measuring tube
J
.
2.
Clean the electrode rod and measuring surface.
3.
Wipe off loose deposits with a fat-free cloth.
Scrub off stubborn deposits using sandpaper (medium grain).
4.
Next, screw the measuring tube
J
back on and secure it with the threaded pin
I
*.
LRGT 16-4
1.
Clean the measuring electrodes
J
*.
2.
Wipe off loose deposits with a fat-free cloth.
Scrub off stubborn deposits using sandpaper (medium grain).
Continue as described below:
*
I
/
J
= key to overall view, see page 23
LRGT 16-3, LRGT 17-3, LRGT 16-4
1.
Install the clean conductivity transmitter as described on page 27.
2.
Switch on the supply voltage.
3.
Bring the equipment or plant into service, see page 37.
4.
Compare the reading with the conductivity directly established from a reference measurement, see
page 44.
5.
Check the equipment using the test function of the conductivity transmitter,
see page 47.
