Teledyne gfc 7000ta operation manual Teledyne Analytical Instruments 169

Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer

STEP TWO: Set the expected CO2 Span Gas concentration:

The CO2 span

concentration values automatically default to 400.0 Conc.

To change this value to

the actual concentration of

the span gas, enter the number by pressing the button under each digit until the expected value appears.

SAMPLE*		RANGE = 500.000 PPM				CO2 =X.XXX
< TST TST > CAL			CALZ	CALS		SETUP
M-P CAL		RANGE = 500.			PPM	CO2 =X.XXX
< TST TST >		ZERO		CONC		EXIT
M-P CAL		CO2 SPAN CONC: 450.000 Conc
0	0	0	4	5	.0	ENTR EXIT

This sequence causes the analyzer to prompt for the expected CO2 span concentration.

EXIT ignores the new setting and returns to the previous display.

ENTR accepts the new setting

and returns to the previous display.

NOTE

For this Initial Calibration it is important to independently verify the PRECISE CO2

Concentration Value of the SPAN gas.

If the source of the Span Gas is from a Calibrated Bottle, use the exact

concentration value printed on the bottle.

STEP THREE: Perform the zero/span calibration. Zero and span checks using the zero/span valve option are similar to that described in Section 7.2, except that zero air and span gas is supplied to the analyzer through the zero/span valves rather than through the sample inlet port.

The zero and cal operations are initiated directly and independently with dedicated buttons (CALZ & CALS).

Teledyne Analytical Instruments 169