Teledyne API – T101 Operation Manual Calibration Procedures
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6.5. MANUAL CALIBRATION WITH IZS OPTION
The following section describes the basic method for manually calibrating the Model
T101 analyzer in H2S measurement mode using the IZS option. The same method may
be used to calibrate the T101 analyzers configured for SO2 measurement but requires that
an SO2 permeation tube be installed in the instrument instead of the standard H2S tube.
(SO2 permeation tubes differ from H2S tubes and can be purchased directly from a
manufacturer).
See Section 6.8 for instructions on calibrating analyzers configured for multigas
measurement mode.
Under the best conditions, the accuracy off the H2S 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 H2S contained in the tube is depleted. Whereas this may be
sufficient for calibrating instrument configured for H2S measurement and for informal
calibration checks of instruments measuring SO2, it is not adequate for formal SO2
calibrations and is not approved for use by the US EPA as a calibration source for
calibrating SO2 monitoring equipment.
For applications where more stringent calibration requirements are specified for an
instrument with an IZS option installed the following provisions must be followed.
1. Zero air and span gas must be supplied to the analyzer through the
sample gas inlet as depicted in Figure 6-1.
2. The calibration procedure must be initiated using the CAL button (not the
CALZ and CALS buttons) using the procedure defined in Section 6.2.
3. Using the CAL button 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 H2S and SO2 or a Model T700 Dilution
Calibrator.
SAMPLE RANGE = 500.0 PPB H2S =XXX.X
< TST TST > CAL CALZ CALS SETUP
Use for formal
calibration
operati ons.
Use only for
informal calibr ation
checks.
07266B DCN6485