Teledyne T101, Operation Manual, Page: 173 / 375

Teledyne ML – T101 Operation Manual Calibration Procedures
169
6.3. MANUAL CALIBRATION CHECKS
Informal calibration checks, which 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 H
2
S measurement mode. The same method may be used to
manually check the calibration of the T101 analyzers configured for SO
2
measurement by
substituting SO
2
span gas for the H
2
S 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 PPB H2S =XXX.X
< TST TST > CAL SETUP
ACTION:
Record theH
2
S
concentration
reading.
ACTION:
Supply span gas to the instrument
SAMPLE H2S STB=XXX.X PPB H2S =XXX.X
< TST TST > CAL SETUP
ACTION:
Record the H
2
S
concentration
reading.
Wait until H2S
STB is below
0.5 ppb. 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 button appears during the transition from zero
to span. You may see both buttons.
SAMPLE RANGE = 500.0 PPB H2S =XXX.X
< TST TST > CAL SETUP
Scroll the display to the
H2S STB test function.
ACTION:
Supply the instrument with zero gas.