Bacharach PCA3 Especificaciones descargar pdf (Pagina 88)

PCA



3 Manual

88 0024-9473 Rev 4

7.5. Sensor Replacement

All sensors are replaced in a similar manner. Do the following to replace either

the O

, CO

LOW

, CO

HIGH

, NO, NO

, or SO

sensor. Refer to Replacement Parts on

page 94 for a list of sensors and part numbers.

NOTE: The typical life expectancy of the O

, SO

and NO

sensors is 2 years. Typical life expectancy of the CO,

HIGH

and NO sensors is 3 years.

1. Turn OFF the analyzer.

2. Remove the battery cover.

3. Remove the sensor retainer.

4. Remove the tubing from the gas cup of sensor being replaced.

5. Unplug the sensor along with its printed circuit board from the analyzer’s

main board.

6. Remove the sensor’s gas cup by twisting its bayonet fitting

counterclockwise, and then pulling the cup straight up.

7. Carefully remove the old sensor from the B-Smart

sensor PCB,

keeping in mind that there is an adhesive foam disk in between the PCB

and sensor.

IMPORTANT: When replacing the O

sensor, be sure that

the “+” sensor pin plugs into the PCB socket that is also

marked “O

+”. Also, when replacing an NO sensor,

replace the bias battery.

8. Remove the replacement sensor from its plastic canister. Note that the

LOW

, CO

HIGH

, SO

, and NO

sensors have a shorting spring installed

between two of their pins. Remove and discard this spring before

installing the sensor.

9. Attach the gas cup to new sensor, making sure that when the sensor

assembly is plugged into the analyzer’s main board, the tubing

connections on top of gas cup are aligned as shown in Figure 7-7.

10. Plug the sensor into analyzer, and then reattach tubing to gas cup.

11. Install the sensor retainer and battery cover.

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