How To Proceed If A Repair Is Necessary - Siemens SITRANS TCSC Operating Instructions Manual

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MAN-100414
Cause
Sensor current < 3.6 mA
Sensor current > 21 mA
7.3

How to proceed if a repair is necessary

If it is necessary to repair the instrument, please con-
tact Siemens. You find the locations on our homepage
"www.siemens.com/processautomation".
SITRANS TCSC - Operating Instructions
Rectification
Check signal conditioning instrument
Check the terminal voltage on the signal condi-
tioning instrument; if it is < 17 V, the signal condi-
tioning instrument is defective -> exchange signal
conditioning instrument or return it for repair
If the terminal voltage is > 17 V, disconnect the
sensor cable at the signal conditioning instrument
and replace it with a 1 kΩ resistor. If the fault
signal does not disappear, the signal conditioning
instrument is defective -> exchange signal condi-
tioning instrument or return it for repair
Check sensor or sensor cable
Reconnect the sensor cable to the signal con-
ditiong instrument, disconnect the sensor and
replace it with a 1 kΩ resistor. If the fault signal
does not disappear, then the sensor cable is
broken -> replace the sensor cable
If there is no longer a fault signal on the line, the
sensor is defective -> exchange sensor or return
it for repair
Check signal conditioning instrument
Disconnect sensor cable and replace it with a
1 kΩ resistor. If the fault signal does not disap-
pear, the signal conditioning instrument is defec-
tive -> exchange signal conditioning instrument or
return it for repair
Check sensor or sensor cable
Reconnect the sensor cable to the signal con-
ditiong instrument, disconnect the sensor and
replace it with a 1 kΩ resistor. If the fault signal
does not disappear, then the sensor cable is
short-circuited -> eliminate the short-circuit or
replace the sensor cable
If there is no longer a fault signal on the line, the
sensor is defective -> exchange sensor or return
it for repair
21

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