Teledyne 9110T instruction manual Evaluating NO2  no Converter Performance, Step

Model 9110T NOx Analyzer Troubleshooting & Service

STEP 3:

To cause the analyzer to calculate and record the NO2  NO converter efficiency, press:

Starting from

CONVERTER EFFICIENCY MENU

(see preceding steps)

Toggle these

buttons to initialize

the converter

efficiency at 1.0000.

M-P CAL CONVERTER EFFICIENCY MENU

	NO2		CAL	SET				EXIT
M-P CAL				CE FACTOR:1000.0 Gain
		1.	0	0	0	0	ENTR EXIT
M-P CAL				CONVERTER EFFICIENCY MENU
	NO2		CAL	SET				EXIT
SAMPLE					RANGE=500.0 PPB		NOX= XXXX
< TST TST >					ENTR		SETUP

The analyzer calculates the converter’s efficiency.

Check the calculated efficiency

gain factor.

Toggle TST> button until ...

SAMPLE	NO2 STB=XX.X PPB
<TST TST>		SETUP

Allow NO2 gas of the proper concetration to enter

the sample port at the rear of the analyzer.

	SAMPLE		NO2 STB=XX.X PPB
	<TST TST> ENTR			SETUP
M-P CAL		CONVERTER EFICIENCY MENU
	NO2 CAL	SET		EXIT

Set the Display to show

the NOX STB test

function.

This function calculates

the stability of the NO/NOx

measurement.

Wait until NOX STB falls below 0.5 ppb.

This may take several

minutes.

If the gain factor is NOT
	M-P CAL		CE FACTOR=0.9852 Gain
between 0.9600 and 1.0200,
	0.	8	8	5	2	ENTR EXIT
the
NO2 NO converter
needs to be replaced.

12.7.10.4. Evaluating NO2  NO Converter Performance

If the converter appears to have performance problems (conversion efficiency is outside of allowed range of 96-102%), check the following:

Teledyne Analytical Instruments 295