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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:

est ok, check connection

cables and receiver instrument,

replace if necessary.

est 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.

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ADC 410F Istruzioni per gli Interventi Pagina 57