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Teledyne ML - T100 UV Fluorescence SO2 Analyzer
Calibration Procedures
177
IMPORTANT
If the ZERO or SPAN buttons are not displayed during zero or span calibration, the
measured concentration value is too different from the expected value and the analyzer
does not allow zeroing or spanning the instrument.
Refer to Section 10.4 for more information on calibration problems.
6.3. MANUAL CALIBRATION CHECKS
Informal calibration checks will only evaluate the analyzer’s response curve, but do not
alter it. It is recommended as a regular maintenance item, to perform calibration checks
in order to monitor the analyzer’s performance. To carry out a calibration check rather
than a full calibration, perform the following procedures:
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
STABIL=XXX.X PPB
SO2=XXX.X
< TST TST >
CAL
SETUP
ACTION:
Record the SO
2
concentration
reading.
ACTION:
Supply span gas to the instrument
SAMPLE
STABIL=XXX.X PPB
SO2=XXX.X
< TST TST >
CAL
SETUP
ACTION:
Record the SO
2
concentration
reading.
Wait until
STABIL
is
below
0.5 ppb.
This may take
several minutes.
The value of
STABIL
may jump
significantly.
Wait until it falls
below
0.5 ppb. This
may take several
minutes.
SAMPLE
STABIL=XXX.X PPB
SO2=XXX.X
< TST TST >
CAL
SETUP
The
SPAN
key appears during the transition from zero to
span. You may see both keys.
SAMPLE RANGE = 500.000 PPB SO2 =XXX.X
< TST TST >
CAL
SETUP
Scroll the display to the
STABIL
test function.
ACTION:
Supply the instrument with zero gas.
Figure 6-4: Setup for Manual Calibration Checks
Содержание T100
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