Operating Instructions

34
11 Diagnostics and servicing
VEGAPULS C 21 • Two-wire 4 … 20 mA/HART
58341-EN-191014
Code
Text message
Cause Rectication DevSpec
State in CMD 48
M507
Error in the instru-
ment settings
Error during setup
Error when carrying out a reset
False signal suppression faulty
Carry out reset and repeat setup
Bit 7 of
Byte 14 … 24
M508
Data error in pro-
gram memory
Bluetooth controller
Bit 8 of
Byte 14 … 24
M509
Software update
Bit 9 of
Byte 14 … 24
M510
No communication
with the sensor
Bit 10 of
Byte 14 … 24
11.5 Treatment of measurement errors
The tables below give typical examples of application-related meas-
urement errors.
The images in column "Error description" show the actual level as a
dashed line and the output level as a solid line.
1
2
Level
time
0
1 Real level
2 Level displayed by the sensor
Note:
If the output level is constant, the cause could also be the fault setting
of the current output to "Hold value".
If the level is too low, the reason could be a line resistance that is too
high
Liquids: Measurement error at constant level
Fault description Cause Rectication
Measured value shows a too
low or too high level
Level
time
0
Min./max. adjustment not correct Adapt min./max. adjustment
Incorrect linearisation curve Adapt linearisation curve