Teledyne API – T101 Operation Manual Calibration Procedures
169
6.3. MANUAL CALIBRATION CHECKS
Informal calibration checks, which only evaluate but do not alter the analyzer’s response
curve, are recommended as a regular maintenance item and in order to monitor the
analyzer’s performance.
The following section describes the basic method for manually checking the calibration of
the Model T101 analyzer in H2S measurement mode. The same method may be used to
manually check the calibrate the T101 analyzers configured for SO2 measurement by
substituting SO2 span gas for the H2S span gas listed. See Section 6.8 for instructions for
performing calibration checks on analyzers configured for multigas measurement mode.
To carry out a calibration check rather than a full calibration, follow these steps.
STEP ONE: Connect the sources of zero air and span gas as shown in Figure 6.1.
STEP TWO: Perform the zero/span calibration check procedure:
SAMPLE H2S STB =XXX.X P PB H2S =XXX.X
< TST TST > CAL SETUP
ACT IO N:
Record theH2S
concentration
reading.
A
CTION:
Supply span gas to the ins trumen t
SAMPLE H2S STB=XXX.X PPB H2S =XXX.X
< TST TST > CAL SETUP
ACTION:
Record the H2S
conce ntrat ion
reading.
Wait until H2S
STB is below
0.5 pp b. This
may take
several minutes.
The value of H2S
STB may jump
significantly.
Wait until it falls
below 0.5 ppb. This
may take several
minutes.
SAMPLE H2S STB=XXX.X PPB H2S =XXX. X
< TST TST > CAL SETUP
The SPAN butt on appea rs during the tran sition f rom zero
to span. You may see b oth but tons.
SAMPLE RANGE = 500.0 PPB H2S =XXX .X
< TST TST > CAL SETUP
Scroll the display to the
H2S STB test function.
A
CTION:
Supply the instr ument with zero g as.
07266B DCN6485