OMH
page 22
OMH K02/1122
13. Failure
Failure
Reason
Remedy
too high
pressure
drop
Viscosity of medium and/or flow
rate too high
raise temperature (consider allowed
temperature range)
reduce flow rate
use bigger volumeter
leakage
seal not tightened enough
seal is damaged
tighten screws
exchange seal
check chem. resistance
Blocked
volumeter
foreign substance
pick up mounted too far inside
medium is not lubricating
enough
not enough inlet pressure
clean volumeter
use filtration (see chap. 8)
adjust pick up
use OMS
raise inlet pressure
too high
measuring
default
air lock
degassing
too high pulsation
not enough counter pressure
operation
-high flow fluctuation
-quantity too small
-different operation data
high wear
fault at the pick up and/or
electronic
remove air
raise system pressure, reduce temp.
change pump, modify system
see min. pressure
change of operating conditions
new volumeter
filtration of abrasive material
see instructions of pick up and/or
electronic
no signal
defective pick up insert
defective connection
screw volumeter is not working
wrong power supply
screw out pick up insert and check it: pick
up insert has to send a pulse by
approximation to a ferromagnetic material
(see luminous diode)
check luminous diode
check connections
put screw volumeter into action
adjust electronics
no ordinary
signal
defective pick up insert
defective contacts
external interferences
distance to pole wheel not
correct
new pick up insert
check contacts
install cables (and measuring transducer)
carefully
check signal with oscilloscope - correct the
distance
