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Group P
P 1
Totalizer connected but does
not count any pulses
P 2
Unsteady pulse rate
P 3
Pulse rate too high or
too low.
Group S
S 1
No function
Group D/I/P/S
D / I / P / S 1
Unsteady display and
outputs
D / I / P / S 2
No display and no
function of outputs
Fault / Symptom
Fault / Symptom
Fault / Symptom
Installation and operating instructions IFC 020
Cause
Incorrect connection/polarity
Totalizer or external voltage
source defective.
Current output is external
voltage source, short circuit
or current / pulse output
defective
Pulse output is deactivated,
see Fct. 1.06.
– Process product
–
conductivity too low,
–
particles/air inclusions
–
too large or inhomogeneous
– Pulsating flow
– Time constant too low
–
or switched off
Incorrect setting for
pulse output.
Cause
Incorrect connection/polarity
of status display
Status display or output
defective or external
voltage source not
supplying voltage.
Cause
– Process product
–
conductivity too low,
–
particles/air inclusions
–
too large or inhomogeneous
– Pulsating flow
– Time constant too low
Power OFF
Check power fuse(s)
F1 (F1 and F2 for DC).
Remedial action
Connect properly,
see Sect. 2.4.
Check output (see Sect. 7.2)
with new totalizer:
Test ok, check connection
cables and previous
totalizers and external voltage
source, and replace if
necessary.
Test faulty, pulse output
defective, replace signal
converter (see Sect. 8.4)
or contact Krohne Service.
Check connection and cables,
see Sect. 2.4. Voltage between
I + and I⊥ approx. 15 V.
Switch off device, eliminate
short circuit, switch device
on again. If no function,
then current or pulse
output defective. Replace
signal converter (see Sect.
8.4) or contact Krohne
Service.
Switch on under Fct. 1.06.
Increase or switch on
time constant, under Fct. 1.02
orswitch on if necessary.
Change setting under Fct. 1.06.
Remedial action
Connect properly,
see Sect. 2.4.
Set status output under Fct. 1.07
to "F/R INDIC." (flow direction)
and check (see Sect. 7.2)
with new status display:
Test ok, check previous
status display and external
voltage source, and replace
if necessary.
Test faulty, status output
defective, replace signal
converter (see Sect. 8.4) or
contact Krohne Service.
Remedial action
Increase time constant,
under Fct. 1.02
Switch power on.
Replace if defective,
see Sect. 8.2.
7/4
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