Teledyne T200, Руководство по эксплуатации, Страница: 192 / 425

Calibration Procedures Teledyne API
– T200 NO/NO
2
/NO
X
Analyzer Operation Manual
190
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% NO
2
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.
2. 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.
3. 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
06858E DCN7057