BM 70 M
65
Group D: Display
No.
Fault / Symptom
Cause
Corrective action
D4 Display
shows
"START".
Device carries out a hot
start after a parameter
change.
Wait until measured value
appears.
D5
Display flashes
"SPECT.ERR.".
Newly set operating
parameters do not tally with
the stored spectrum when
e.g. the tank height (Fct.
3.1.1) and/or the antenna
extension (Fct. 3.1.4) have
been changed.
Record new empty spectrum as
described in Sect. 8.6.12 (Fct.
3.5.2).
D6 Display
indicates
error message
alternating with the
measured value.
An error has occurred.
Note down error messages,
eliminate as described in Sect.
8.8
Group A: Signal output
No.
Fault / Symptom
Cause
Corrective action
A1 Receiver
instruments
connected to current
output indicate
"zero".
Polarity (connection) of
receiver instruments is
incorrect.
Connect up properly as
described in Sect. 7.8.
BM 70 M current output
board or connected receiver
instruments defective.
Test current output as described
in Sect. 8.7.3.
- All tests OK: Check receiver
instruments and
replace if necessary.
- Test reveals faults: current
output board
defective; consult KROHNE
Service or replace
BM 70 M signal converter (see
Sect. 7.3).
"OFF" (= current output
deactivated) is set under
current output I, Fct. 3.3.1,
"FUNCTION I".
Depending on the application,
set LEVEL, CONVERSION,
DISTANCE or REFLECTION
under Fct. 3.3.1, see Sect. 8.6.8
A2
2 or 22 mA present at
the current output.
An error has occurred.
Invoke display of error list, see
Sect. 8.8. For cause and
elimination, see Sect. 8.8.
If error message not to be
displayed via the current output,
set 4-20 mA without error
message, as described in Sect.
8.6.8 (Fct. 3.3.2).
A3
The measured value
at the current output
is incorrect, but the
measured value in
the BM 70 M display
is correct.
Settings of the current
output are incorrect.
Set current output correctly as
described in Sect. 8.6.8
(Fct.3.3.1 - 3.3.4).
Summary of Contents for BM 70 M Series
Page 75: ...BM 70 M 75 10 Certificates and approvals 10 1 Declaration of Conformity...
Page 83: ...BM 70 M 83 Annex C Spare parts...
Page 84: ...84 BM 70 M...
Page 85: ...BM 70 M 85...
Page 102: ...16 BM 70M EEx BM 70Mi EEx 11 Approvals...
Page 103: ...BM 70M EEx BM 70Mi EEx 17...
Page 104: ...18 BM 70M EEx BM 70Mi EEx...
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