sepam 20 user manual - Schneider Electric

7
Commissioning Checking optional module
connections
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Checking temperature sensor input
connections to the MET148-2 module
The temperature monitoring function provided by Sepam T20, T23 or M20 units
checks the connection of each sensor that is configured.
An "RTD FAULT" alarm is generated whenever one of the sensors is detected as
being short-circuited or disconnected (absent).
To identify the faulty sensor or sensors:
1. Display the temperature values measured by Sepam T20 or M20 using the
SFT2841 software.
2. Check the consistency of the temperatures measured:
b The temperature displayed is "****" if the sensor is short-circuited (T < -35°C
or T < -31°F)
b The temperature displayed is "-****" if the sensor is disconnected (T > 205°C
or T > 401°F).
Checking the analog output connection to
the MSA141 module
1. Identify the measurement associated by parameter setting with the analog output
using the SFT2841 software.
2. Simulate, if necessary, the measurement linked to the analog output by injection.
3. Check the consistency between the value measured by Sepam and the indication
given by the device connected to the analog output.
PCRED301005EN - 06/2008