KROHNE BM 70 A Installation And Operating Instructions Manual page 57

8.8.3. Error messages and their representation in display and at outputs
The following list gives all error messages that can occur:
Error messages Description of
error
Type Text
In 2nd
(Sect
line of
.
display
8.8.1)
b) NO Evaluable
M.VALUE measuring
signals not
available
c) LINE Power failure
INTER-
detected
RUPT
SWEEP Restricted
LOW
functioning of
microwave
board
WATCH Processor
DOG monitoring
SPECT. Empty
ERR. spectrum
faulty
NO DISP. Configuration
faulty
CAL. EEPROM
DATA error: current
output
calibration
data
CONFIG. EEPROM
ERR
error:
parameters
faulty
d) EEPROM EEPROM
ERR. defective
ADC ERR. Analog/digital
converter
defective
INTEGR. Integrator
defective
SIGNAL Measuring
DOWN signal too
weak for
evaluation
VCO RISE Fault on
microwave
board
VCO Fault on
SWEEP
microwave
board
e) FATAL CPU board
ERROR defective
8.8.4 Error display during measurement
In the setting level under Fct. 3.2.4 ERROR MSG. (error messages), it is possible to select whether errors are to be
displayed during measurement. When YES set: "error message(s)" are displayed automatically to alternate with the
measured value. The errors will continue to be displayed until their cause has been eliminated.
8.8.5 Error list
All errors are stored in an Error List in the BM 70 A/P. The errors are retained in this list until: 1. the cause(s) of the
error(s) has been eliminated and 2. the error has been acknowledged. Errors that have been acknowledged but whose
cause has not been eliminated are retained in the Error List.
To invoke the Error List, press keys ↵ ↑ → →. With → you can page through the list. For further information on the
Error List: see Sect. 8.3.
Installation and operating instructions BM 70 A/P
To correct device fault
If this error is displayed for a lengthy
period, this could mean application-
induced errors. Check the application
conditions!
During restart following a brief power
failure. Display vanishes as soon as a
valid measured value is again present.
Measurement continued, possibly with
reduced accuracy. If error present for
longer time or "VCO SWEEP" error (see
below) occurs, consult KROHNE Service!
If error present for longer time, this
means an error on the CPU board; needs
to be replaced by KROHNE Service!
The current empty-tank spectrum does
not match the changed operating
parameters. Remedy: record new empty
spectrum (Fct 3.5.2).
Reset parameters for the displayed units
(Fct. 3.2.2, 3.2.3).
Calibration data of the current output
need to be checked by KROHNE Service
and reset if necessary.
Check all operating parameters and reset
if necessary. If error persists: EEPROM
defective. Needs to be replaced by
KROHNE Service!
EEPROM defective. Needs to be
replaced by KROHNE Service!
CPU board defective. Needs to be
replaced by KROHNE Service!
CPU board defective. Needs to be
replaced by KROHNE Service!
No measuring signal, usually caused by
a defect in the electronics.
Microwave board defective. Needs to be
replaced by KROHNE Service!
Microwave board defective. Needs to be
replaced by KROHNE Service!
After a device start-up. If still possible,
invoke Error List and note down any other
errors. Consult KROHNE Service!
Output of errors via display and outputs,
depending on setting
Display Current output I
ERROR MSG. RANGE I
Fct. 3.2.4 Fct. 3.3.2
4-20/2=E
YES NO 4-20
4-20/22=E
yes no yes no
yes no yes no
yes no no no
yes no no no
yes no no no
yes yes no no
yes
yes no no
(22 mA)
yes
yes yes no
(22 mA)
yes no yes no
yes no yes no
yes no yes no
yes no yes no
yes no yes no
yes no yes no
yes yes no no
Page: 57
Switching output S
FUNCTION S
Fct. 3.6.1
OFF
ERROR
LEVEL
OPEN
DISTANCE
ERROR
CONVERSION
CLOSED
REFLECTION
yes no
yes no
no no
no no
no no
no no
yes no
yes yes
yes no
yes no
yes no
yes no
yes no
yes no
no no
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