Re-Zero; Functional Checking; Functional Checking With Gassing Cell (Short Range Versions Only) - Honeywell Searchline Excel Cross-Duct Technical Handbook

Infrared gas detector

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MAN0889_Issue 3_03/13

4.2 Re-zero

(1) Using the SHC1 Handheld Interrogator, select CalSensor from the Calibrate menu. The analogue output

will be inhibited. (See Appendix A for details about how to use the Interrogator).

Note

There must be no gas in the system beam path whilst this procedure is carried out.

(2)

The following message is displayed:

(3) Press Enter. The following message is displayed while the calibration operation is being performed:

(4) If the calibration is successful, the following message is displayed for a period of three seconds:

(5) Using the SHC1 Handheld Interrogator release the Searchline Excel signal output.

The output can be released by pressing ESC followed by

Searchline Excel Cross-Duct incorporates a built in gassing cell for functional test purposes. In order to use

the gassing cell, the mounting block lid must be in place, to maintain a gas tight seal.

Before using the gassing cell for the first time, remove the ends of the plastic nozzles (with a knife or wire

cutters). Rubber end caps are used to seal the tubes afterwards.

Air Shield

Gas In/Out

Gassing Cell

4. Maintenance

Ensure Zero Gas

Press Enter

Processing Data

Please Wait...

Zero Calibrated

Searchline Excel Cross-Duct Technical Handbook

on the keyboard.

Slot for test filter

Mounting Block

Transmitter

Receiver

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