KROHNE CORIMASS G-MFM 4085 EN - Manual (Page 89)

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Current output switched
off.
Switch on as per Fct.
3.3.1
I 2 Wrong display on
connected instrument
Current programming
not correct.
Correct the programming
as per Fct. 3.3.1 - 3.3.4
I 3 Fluctuating display on
connected instrument
Time constant too small Increase the time
constant as per Fct. 3.1.3
Group P
P1 Connected totalizer not
counting
Connection / polarity not
correct.
Check and correct as per
Section 2.3
Totalizer or external
supply voltage faulty.
Check output with
totalizer:
Test OK
Check cabling and totalizer.
Check external voltage supply
Test faulty
Pulse output faulty. Replace
converter or call Krohne
Service.
Alarm output is used as
external voltage supply, a
possible electrical short-circuit
or alarm/pulse output faulty.
Check connections as per
Section 2.3. Voltage between
terminals 5 and 4.2 approx. 24
V. Correct short circuit if
present. If still faulty the
alarm or pulse output is faulty.
Re-place converter or call
Krohne Service.
Pulse output is switched
off
Switch on as per Fct.
3.4.1
P2 Fluctuating pulse rate Time constant too small Increase time constant as
per Fct. 3.1.3
P3 Pulse rate too high or too
low
Programming of pulse
output incorrect.
Correct programming as
per Fct. 3.4.1 - 3.4.4
External induced noise due
to low quality cable or
unscreened cable.
Check cabling and replace
with screened cable.
See Section 2.3
Group A
A1 Alarm output not
functioning
Connection / polarity
incorrect.
Correct as per Sect. 2.3
Alarm output or external
instrument faulty
Program alarm output to
”direction” as per Fct. 3.5.1.
Set flow direction to negative
and check alarm output.
Test OK
Check external instrument
and if necessary replace.
Test faulty
Alarm output faulty. Replace
converter or call Krohne
Service.
Alarm output switched off Switch on as per Fct.
3.5.1
A2 Incorrect voltage level at
output terminals (Hi/Lo)
Incorrectly programmed in
Fct. 3.5.2
Correct as follows:
Hi = 24 V
Lo = 0 V