WIKA LH-20 - Manual (Page 21)

21 WIKA Operating instructions - Submersible pressure transmitter model LH-20
Fehlercode Ursache Beseitigung
4 … 20 mA
signal not
stable
Level fluctuations Adjust integration time via PACTware
No atmospheric
pressure compen-
sation
Check the capillariy and cut it clean
Check the pressure compensation in the housing and clean the
filter element, if necessary
4 … 20 mA
signal
missing
Connection to
voltage supply
wrong
Check connection and correct, if necessary according to chapter
"Wiring plan"
No power supply Check cables for breaks; repair if necessary
Operating voltage
too low or load
resistance too high
Check, adapt if necessary
Current sig-
nal 3.6 mA;
22 mA
Electronics mo-
dule or measuring
cell defective
Exchange the instrument or send it in for repair
In Ex applications, the regulations for the
wiring of intrinsically safe circuits must
be observed.
6.3 Shorten suspension cable
Shorten the suspension cable individually.
Proceed as follows:
1. Remove the filter adapter from the capillary
line
2. Cut the suspension cable to the requested
length with side cutters
Caution:
Do not squeeze the capillary cable, as
this will impair the pressure compensati-
on. If necessary, rework the capillary with
a sharp knife.
3. Remove approx. 10 cm of the cable mantle,
strip off approx. 1 cm of insulation from the
ends of the wires
4. Insert the filter adapter
The work steps are finished.
6.4 Instrument repair
You can find information for a return shipment
under "Service" on our local website.
If a repair is necessary, please proceed as
follows:
•
Complete one form for each instrument
•
If necessary, state a contamination
•
Clean the instrument and pack it damage-
proof
•
Attach the completed form and possibly also
a safety data sheet to the instrument
7 Dismount
7.1 Dismounting steps
Warning:
Before dismounting, be aware of
dangerous process conditions such as
e.g. pressure in the vessel or pipeline,
high temperatures, corrosive or toxic
products etc.
Take note of chapters "Mounting" and "Connec-
ting to power supply" and carry out the listed
steps in reverse order.
7.2 Disposal
The instrument consists of materials which can
be recycled by specialised recycling companies.
We use recyclable materials and have designed
the parts to be easily separable.
Materials: see chapter "Technical data"
If you have no way to dispose of the old instru-
ment properly, please contact us concerning
return and disposal.