ABB Endura AZ40 Manual page 5

Sensor assembly, heater and thermocouple kit

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5 Shutting down / removing the sensor

assembly from the process

DANGER – Serious damage to health / risk to life

Allow sufficient time for the sensor assembly to cool

before performing these procedures.

5.1 Shutting the sensor assembly down at the process

Referring to Fig. 5.1.

1. Close the air supply valve A and shut down the test gas

line B at the supply.

Fig. 5.1 Shutting down instrument air and test gas supplies

5.2 Disconnecting the sensor air and test gas supplies at

the process

Referring to Fig. 5.2:

1. Disconnect air line B and test gas line C at sensor D.

Fig. 5.2 Disconnecting instrument air and test gas supplies

5.3 Disconnecting the sensor electrical power and

signal cables at the process

DANGER – Serious damage to health / risk to life

Allow sufficient time for the sensor assembly to cool

before performing this procedure.

DANGER – Serious damage to health / risk to life

The transmitter must be isolated from mains power

supplies before performing this procedure.

Referring to Fig. 5.3:

1. Use a medium flat-bladed screwdriver to unscrew 4

(captive) cover screws A and remove cover B from

sensor assembly C.

2. Disconnect mains cable D from terminal block E

3. Disconnect signal cable F from terminal block G.

4. Disconnect thermocouple cables H from terminal block

5. If optional blowback is fitted, disconnect cable J from

terminal block K.

Fig. 5.3 Disconnecting sensor cables

Endura AZ40 | Sensor assembly | Heater and thermocouple kit | INS/ANAINST/008-EN Rev. B