Bacharach Flue-Gas Sample Conditioning System Especificaciones descargar pdf (Pagina 71)

ECA 450 Maintenance

Instruction 0024-9400

4.4.3 HC Sensor Replacement

Unlike the other sensors that are held in place by their associated bayonet

holders, the HC sensor is plugged into its printed circuit board which, in

turn, is secured inside the sensor compartment with four screws. Remove this

board and replace the sensor as follows:

Material Required:

• Medium Phillips screwdriver

• Small flat blade screwdriver

• Replacement HC sensor (refer to Section 6.1)

Procedure:

1. Gain access to sensor compartment by first removing two screws from the

sensor-cover plate, and then removing plate (see Figure 4-3).

2. Unplug the HC sensor’s printed circuit board from its connector jack.

3. Remove the sensor’s printed circuit board by first removing the board’s

four corner screws, and then lifting the board with the HC sensor

attached out from the sensor compartment.

4. Unplug old sensor and discard.

5. Remove replacement sensor from its plastic canister; then plug sensor

into its printed circuit board.

6. Install and secure the HC sensor’s circuit board inside the sensor

compartment using the screws removed in Step 3.

7. Install sensor-cover plate that was removed in Step 1.

8. Place analyzer in an area of fresh air and turn it ON. After the warm-up

cycle completes, observe that no sensor error messages should have

appeared.

9. Calibrate the new sensor per Section 3.

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Bacharach Flue-Gas Sample Conditioning System Especificaciones Pagina 71