halstrup-walcher PI10, Instruction Manual

Page: 9 / 12

PU/PI and PS10 Instruction Manual
9
5 Troubleshooting
Error Description Potential Cause Corrective Action
no output signal

supply voltage is not
connected

incorrect supply voltage

defective fuse

defective input protection diode
only for DC power:

defective reverse polarity
protection diode

connect correct supply voltage

connect the correct supply voltage
(see rating plate).

replace the SI1 fuse (Wickmann model
TR5 200 mAT)

Send the instrument to the
manufacturer for repair

Send the instrument to the
manufacturer for repair
output signal is
constant, despite
change in pressure

defective output protection
diode

pressure ports reversed
Send the instrument to the
manufacturer for repair

connect pressure as outlined in
section 3. “Mounting”
output signal incorrect
(only for 0...20 mA)

defective output protection
diode

defective pressure
measurement cell
for current output:
• output loadtoo high
for voltage output:
• load resistance too low

current output calibrated
incorrectly
Send the instrument to the
manufacturer for repair

Send the instrument to the
manufacturer for repair

observe maximum output load of 500


observe minimum load resistance
(either 2 k

, 5 k

or 10 k

, depending
on output; see section 6 “Technical
Data”

follow instructions on calibrating the
zero point at a current output of
0…20mA
zero point cannot be
adjusted using P0 defective pressure measurement
cell Send the instrument to the
manufacturer for repair