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- Series VMM
Errors and returns
Technical changes reserved
- 47 -
8.2
Self-test errors
Self-test errors
such as problems with a sensor line or inconsistent parameter settings are
displayed as textual error messages on the LCD. When the cause of error has been fixed, the
message disappears from the display automatically.
Whe
n a self-test error occurs the corresponding error message is displayed as plain text in
the second line of the LCD.
The language is set by parameter language (
Parameter "Language" in § 7.1.11) to English
(standard) or German.
The following table details what problems you can solve yourself and how to solve them.
If it is not possible to rectify a problem, please return the unit for repair together with a short
error description, the ambient conditions and the period of use until the problem appeared.
Problem
(indication on the
display)
Possible cause
Troubleshooting
Empty pipe
Empty-pipe detection has been activated,
pipe is empty
Filling must be ensured
Exciter current
Interruption / short circuit in the excitation
coil. All signal outputs will be set to zero.
Check the wiring between field
coil and display electronics.
Measuring circuit satu-
rated
The measured electrode voltage is too high.
All signal outputs will be set to zero.
Flow rate exceeds the upper
range value.
Vmax > 32.8 ft/s (10 m/s).
Current saturated
The current output is overloaded.
Based on the selected settings and the cur-
rent assigned measured variable, the output
current is > 20.4 mA.
Flow rate exceeds the upper
range value.
Vmax > 32.8 ft/s (10 m/s).
Check the upper-range value
and the flow rate settings.
Pulse output saturated The current measured value requires a
pulse rate, which can not be generated with
the set pulse duration and pulse value.
Check pulse duration, pulse val-
ue, and measuring range.
Check the flow rate.
Parameter inconsistent The set parameters are contradictory.
Example: The combination of Upper-range
value, pulse value and pulse duration has to
fit for all measured values.
Check the parameter settings.
Missing EEPROM
The data memory module (DSM) with the
calibration data of the sensor and the cus-
tomer-specific settings of the display elec-
tronics is missing.
Insert the data storage module
(DSM) in the socket on the pow-
er supply board.
