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Part 2
Signal converter IFC 090 D (D = display version) and
Signal converter IFC 090 B (B = basic version), without display
but with HHT or CONFIG operator program (see Sect. 6.2)
Group I
Fault / Symptom
Cause
Remedial action
I 1
Receiver instrument
Incorrect connection/polarity
Connect properly
indicates “0”.
see Sect. 2.3 + 2.7.
Receiver instrument or current
Check output (see Sect. 7.2)
output defective.
with new milliammeter:
Test ok, check connection
cables and receiver instrument,
replace if necessary.
Test faulty, current output
defective. Replace signal
converter (see Sect. 8.7)
or contact Krohne Service
Current output disabled,
Activate under Fct. 1.05.
see Fct. 1.05
Short-circuit between current
Check connection and cables,
output and pulse output.
see Sect. 2.3 + 2.7.
Voltage between I+ and I
⊥
approx. 15 V. Switch off device,
eliminate short-circuit,
and switch device on again.
I 2
Unsteady display
Low electrical conductivity,
Increase time constant,
high solids content,
see Fct. 1.02, or contact
pulsating flow.
Krohne Service.
