Teledyne 9110T instruction manual Teledyne Analytical Instruments 206

Model 9110T NOx Analyzer Calibration Procedures

9.3.5.PERFORMING A MANUAL CALIBRATION WITH THE INTERNAL SPAN GAS GENERATOR

If the analyzer’s reporting range is set for the AUTO range mode, a step will appear for selecting which range is to be calibrated (LOW or HIGH). Each of these two ranges MUST be calibrated separately.

9.3.5.1. Setting the Expected Span Gas Concentration

Note	The expected concentrations for both NOx and NO are usually set to the
	same value unless the conversion efficiency is not equal to 1.000 or not
	entered properly in the conversion efficiency setting.
	When setting expected concentration values, consider impurities in your
	span gas source (e.g. NO often contains 1-3% NO2 and vice versa).

When calibrating the instrument using the internal permeation tube as a span gas source, it is necessary to know, as close as possible, the concentration value of the gas being outputted by the tube. To determine this value:

1.Perform a precision calibration of the instrument as describes in Section 9.3.1.

3.Perform a calibration check as described in Section 9.3.4.

∙Record the value displayed for NO/NOx during the span check portion of the procedure.

∙This will be the concentration value used in subsequent calibrations using the internal span gas source.

∙It is a good idea to measure the permeation tube output once every 4 to 6 months.

4.Ensure that the reporting range span point is set for a value at least 10% higher than the measured value of the permeation tube output

To set the span gas concentration, press:

Teledyne Analytical Instruments 206