P82R Instruction Manual
10
6
Troubleshooting
Error Description
Potential Cause
Corrective Action
no output signal
•
supply voltage is not
connected
•
incorrect supply voltage
•
defective fuse
•
defective input protection
diode
•
connect correct supply voltage
•
connect the correct supply voltage
(see rating plate).
•
replace the SI1 fuse (Wickmann
model TR5 200 mAT)
•
replace D3 (model SM6T33A)
output signal is
constant, despite
change in pressure
•
defective output protection
diodes
•
pressure ports reversed
•
creep suppression set too high
•
replace D6 / D7 (model SM6T18A)
•
connect pressure as outlined in
section 3. “Mounting”
•
Turn the P5 trimmer to the left until
the output signal
≠
0 V / 0/4 mA
output signal incorrect
•
defective output protection
diode
•
defective pressure
measurement cell
for current output:
•
output loadtoo high
for voltage output:
•
load resistance too low
•
replace D6 / D7 (model SM6T18A)
•
Send the instrument to the
manufacturer for repair
•
observe maximum output load of
500
Ω
•
min. load resistance = 5 k
Ω
zero point cannot be
adjusted using P1 / P4
defective pressure measurement
cell
Send the instrument to the
manufacturer for repair
Never use your breath to conduct a performance test, as this could destroy
the measurement cell.
Simple transducer performance test:
Connect tubing to the input port for overpressure. Pinch the tubing between
your index finger and thumb and carefully squeeze any existing air toward the
transducer.
