Calibration Checks; Calibration With Zero/Span Valves - Teledyne 200E Instruction Manual

Model 200E Instruction Manual
If the ZERO or SPAN keys 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
to zero or span the instrument. Consult Section 11.3 for calibration problems.

7.3. 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.
Connect the sources of zero air and span gas as shown in Figure 7-2, then perform the
zero/span calibration check procedure:
Scroll the display to the
NOX STB test function.
Wait until NOX
STB is below
0.5 ppb. This
may take
several minutes.
The value of NOX
STB may jump
significantly.
Wait until it falls
below 0.5 ppb. This
may take several
minutes.

7.4. Calibration with Zero/Span Valves

To perform a manual calibration or calibration check of the analyzer with a zero/span valve
option installed and functioning, use the following method. The basic differences between
calibrating an M200E with the zero/span valve option instead of the basic calibration
method (Section 7.2) are that zero air and span gas are now supplied through dedicated
044100102 Rev A
ACTION:
Supply the instrument with zero gas.
SAMPLE RANGE = 500.0 PPB
< TST TST > CAL
SAMPLE NOX STB=XXX.X PPB
< TST TST > CAL
SAMPLE NOX STB=XXX.X PPB
< TST TST > CAL
ACTION:
Supply span gas to the instrument
SAMPLE NOX STB=XXX.X PPB
< TST TST > CAL
The SPAN key appears during the transition from zero to
span. You may see both keys.
Calibration Procedures
NOX=X.XX
SETUP
NO = X.X
SETUP
ACTION:
Record the NO
NO =X.XX
NO
readings.
SETUP
ACTION:
NO2=X.XX
Record the NO
NO
readings.
SETUP
,
X
& NO
2
,
X
& NO
2
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