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Calibration Procedures
Teledyne API - Model T200H/T200M Operation Manual
192
5.4. 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. 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 5-2 or Figure 5-3.
STEP TWO:
Perform the zero/span calibration check procedure:
SAMPLE
NOX STB= XXX.X PPM
NOX=XXX.X
< TST TST > CAL SETUP
The
ZERO
and/or
SPAN
keys will appear at various
points of this process.
It is not necessary to press
them.
SAMPLE A1:NXCNC1=100PPM NOX=XXX.X
< TST
TST >
CAL SETUP
Set the Display to show
the
NOX STB
test
function.
This function calculates
the stability of the NO/NO
x
measurement
Toggle
TST>
button until ...
Allow zero gas to enter the sample port
at the rear of the analyzer.
Wait until
NOX STB
falls below
0.5 ppm.
This may take several
minutes.
Allow span gas to enter the sample port
at the rear of the analyzer.
Wait until
NOX STB
falls below
0.5 ppm.
This may take several
minutes.
Analyzer display
continues to cycle
through all of the
available gas
measurements
throughout this
procedure.
Record NO
X
, NO, NO
2
or O
2
zero point
readings
Record NO
X
, NO, NO
2
or O
2
span point
readings
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