Emerson UT-P+-STXXXX Calibration Procedure, Summary of Main Menu, Enter Main Menu, First Option

Summary of Main Menu

Enter Main Menu:	10 second timer count down
First Option:	Calibrate Sensor, followed by the “YES?” prompt for selection
Second Option:	Set Relay Option, followed by the “YES?” prompt for selection
Third Option:	Review Settings, followed by the “YES?” prompt for selection
Exit:	Return to normal (if no option is selected)

The following table of responses gives a detailed description of toxic detector conditions.

Table 2 - Table of Responses

Conditional Codes	Current O/P	Status LED	Status LED	Alphanumeric display
	(mA)	RED	GREEN
Main Menu
Calibrate Sensor	3	N/A	N/A	N/A
Set Relay Options
Review Settings
Start-up delay	3	Slow flash		START DELAY
White sensor lead open	2.5	Fast flash		SENSOR FAULT
Black sensor lead open	2.5	Slow flash		SENSOR FAULT
Red sensor lead open	2.5	Slow flash		SENSOR FAULT
Excess drift (>10%)	2.5	Blip/ blink		NEG DRIFT
Auto zero set	3		Solid	SETTING ZERO
Apply calibration gas	3.3	Fast flash		APPLY 50% of full scale
				span gas
Span is set, remove gas	3.6		Solid	REMOVE GAS
Return to normal operation	3.6		Solid	CAL COMPLETE
Normal	4		Blip/ blink	0
Gas present	4.40 - 20.00	Blip/ blink		0 to 100 of full scale

Calibration Procedure

NOTE

The Toxic Detector should always be calibrated when first installed in the field and prior to

calibration we recommend that the toxic detector run for at least 4 hours.

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