Calibration Procedures Model 200E Instruction Manual
gas inlets rather than through the sample inlet and that the zero and span operations are
initiated directly and independently with dedicated keys CALZ and CALS.
Connect the sources of zero air and span gas to the respective ports on the rear panel
(Figure 3-2) to follow the setup in Figure 7-4. Set the expected NO and NO
X
values
according to the procedure described in Section 7.2.
Perform the calibration or calibration check according to the following flow chart:
Wait until NOX
STB falls below
0.05 ppb. This
may take several
minutes.
ZERO CAL M
NOX STB=XXX.X PPB NOX=X.XX
< TST TST > ZERO CONC
EXIT returns to the
main SAMPLE
display
ZERO CAL M NOX STB=XXX.X PPB NOX=X.XX
< TST TST > ENTR CONC EXIT
Pressing
ENTR
changes the calibration of the instrument.
If either the
ZERO
or
SPAN button fails to
appear, see Chapter 11
for troubleshooting tips.
ANALYZER ENTERS
ZERO CAL MODE.
EXIT returns the unit to
SAMPLE mode without
changing the calibration
values.
ZERO CAL M NOX STB=XXX.X PPB NOX=X.X
< TST TST > ZERO CONC EXIT
ZERO CAL M NOX STB=XXX.X PPB NOX=X.X X
< TST TST > CAL CALZ CALS SETUP
SPAN CAL M NOX STB=XXX.X PPB NOX=X.XX
< TST TST > SPAN CONC EXIT
SPAN CAL M NOX STB=XXX.X PPB NOX=X.XX
< TST TST > ENTR CONC EXIT
EXIT returns to the
SAMPLE mode without
changing the calibration
values.
SPAN CAL M NOX STB=XXX.X PPB NOX=X.XX
< TST TST > SPAN CONC EXIT
CTION:
Allow zero gas to enter the sample port at the
rear of the instrument.
SAMPLE RANGE = 500.0 PPB NOX= X.XX
< TST TST > CAL CALZ CALS SETUP
SAMPLE NOX STB=XXX.X PPB NO = X.XX
< TST TST > CAL CALZ CALS SETUP
Scroll the display to the NOX
STB test function. This function
calculates the stability of the
NO/NO
X
measurements.
The value of NOX
STB
may jump
significantly. Wait
until it falls below 0.5
ppb. This may take
several minutes.
Pressing
ENTR
changes the calibration of the instrument.
Analyzer enters
SPAN
CAL Mode.
116 044100102 Rev A
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