Teledyne 9110T Manual Calibration with the Internal Span GAS Generator, As a calibration source

Model 9110T NOx Analyzer Calibration Procedures

9.3.MANUAL CALIBRATION WITH THE INTERNAL SPAN GAS GENERATOR

IMPORTANT	IMPACT ON READINGS OR DATA
	The internal span gas generator’s NO2 permeation tube has a limited
	accuracy of about ±5%. In the USA this may be sufficient for informal
	calibration checks (Section 9.3.4), but it is NOT approved by the US EPA
	as a calibration source.

9.3.1.PERFORMING “PRECISION” MANUAL CALIBRATION WHEN INTERNAL SPAN GAS (IZS) GENERATOR OPTION IS PRESENT

It is necessary to perform a precision calibration using more accurate zero and span gas standards prior to IZS span calibration or cal check.

To perform a precision calibration of the 9110T, connect external sources of zero air and calibrated span gas (Section 9.1.2) and temporarily disconnect the sample gas source as shown below; then follow the procedures described in Section 9.2.3.

Figure 9-3:

IMPORTANT

Pneumatic Connections for 9110T Precision Calibration when IZS Generator Present

IMPACT ON READINGS OR DATA

DO NOT USE THE CALZ or CALS buttons even though they will be visible, as this will cause the instrument to use the internal zero air and span gas.

Instead, press the CAL button. This will cause the analyzer to use the external calibration gas sources.

Teledyne Analytical Instruments 202