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Calibration Procedures Teledyne API M100E Analyzer Operation Manual
182
8.5. MANUAL CALIBRATION WITH IZS OPTION
Under the best conditions, the accuracy off the SO
2
effusion rate of the IZS option’s permeation tube is about
±5%. This can be subject to significant amounts of drift as the tube ages and the amount of SO
2
contained in the
tube is depleted. Whereas this may be sufficient for informal calibration checks, it is not adequate for formal
calibrations and is not approved for use by the US EPA as a calibration source.
Therefore, for formal calibrations of an instrument with an IZS option installed the following provisions must be
followed.
Zero air and span gas must be supplied to the analyzer through the sample gas inlet as depicted in Figure 8-1 of
Section 8.2.
The cali
bratio
n procedure must be initiated using the CAL key, not the CALZ and CALS keys, using the
procedure defined in Section 8.2.
Using the CAL k
ey does not activate the zero/span or sample/cal valves of the IZS option, thus allowing the
introduction of zero air and sample gas through the sample port from more accurate, external sources such as a
calibrated bottle of SO
2
or a Model 700 Dilution Calibrator.
SAMPLE RANGE = 500.000 PPB SO2 =XXX.X
< TST TST > CAL CALZ CALS SETUP
Use for formal
calibration
operations.
Use only for
informal calibration
checkss.
Figure 8-8: Manual Calibration with IZS Option
04515F DCN6048