Sierra Monitor Corporation 2-Wire Series Model 4501-XXToxic Gas Sensor Module, Page, Key Function

					Model 4501-XX Toxic Gas Sensor Module
6.3 DIAGNOSTICS SUB-MENU
Key Function			Display		Description	Reference
M	E	Mode	H2S		Default Display (example 4501-05)	or Sub-Routine A
S	T		CALIB:
M	E	Enter	CAL 0 PPM		Banner: Apply zero gas, [E] when done
S	T
					Operation: Confirm area clear of gas, or apply zero air to sensor.
M	E	Enter	Cal0PPM		There is a minimum time to calibrate at 0PPM. If [E] is hit prior to this time
S	T		Wait.XXX		has elapsed, a countdown screen will appear.
			ZERO		Zero gas setting completed (Message will appear on the screen and after 3
			DONE		seconds will go to the next menu - 25PPM Span)
			XXPPM		Banner: [S] or [T] to change span value, [E] when done	Sub-Routine B
			H2S		Operation: 148 second time out before sensor is returned to service.
			WAIT-148
M	E	Enter	H2S		Banner: Remove gas from sensor	Sub-Routine C
S	T		CAL-OK
					Sub-Routine A - Abort Calibration
M	E	Mode	CALIB		Operation: Hold magnet over [M] for 10 seconds to abort calibration
S	T		ABORTED
			H2S		Default Display
			XXX PPM
					Sub-Routine B - Select Span
			25PPM SPAN	Banner: [S] or [T] to change span value, [E] when done
M	E	Down	C##PPM		Banner: Apply xx-PPM gas, [E] when stable	Should be stable after 3
S	T					minutes of gas exposure
M	E	Enter	H2S		Operation: Remove gas from sensor	If calibration failed, then
S	T		REMOVE GAS			Sub-Routine C
			H2S		Calibration successful
			CAL-OK
					Sub-Routine C - Calibration Fail
M	E	Enter	READ		Operation: Remove gas from sensor read manual, particularly section 6.3 and
S	T		MANUAL		7.6, to check calibration procedures.
			H2S		Calibration Failed
			CAL-FAIL
					Table 6-1
					Calibration Sub-Menu

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