Teledyne 200E - Interferences for no Measurements

Model 200E Instruction Manual Getting Started
Perform the zero/span calibration procedure:
M-P CAL NOX STB=XXX.X PPB NO = X.X
< TST TST > ENTR CONC EXIT
M-P CAL NOX STB=XXX.X PPB NO2= X.X
< TST TST > CAL SETUP
M-P CAL NOX STB=XXX.X PPB NOX= X.X
< TST TST > ZERO CONC EXIT
EXIT returns to the main
SAMPLE display
A
CTION:
Allow zero gas to enter the sample port at the
rear of the instrument.
M-P CAL NOX STB=XXX.X PPB NO2= X.X
< TST TST > SPAN CONC EXIT
M-P CAL RANGE = 500.0 PPB NOX = X.X
< TST TST > ENTR SPAN CONC EXIT
M-P CAL RANGE = 500.0 PPB 03 =
< TST TST > ENTR CONC EXIT
Wait until
NOX STB
falls below 0.5 ppb.
This may take several
minutes.
The SPAN key now
appears during the
transition from zero to
span.
You may see both keys.
If either the
ZERO
or
SPAN buttons fail to
appear see Section 11
for troubleshooting tips.
SAMPLE RANGE = 500.0 PPB NOX= X.X
< TST TST > CAL SETUP
SAMPLE NOX STB=XXX.X PPB NO = X.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
Press ENTR to changes the
OFFSET & SLOPE values for both
the NO and NO
x
measurements.
Press EXIT to leave the calibration
unchanged and return to the
previous menu.
A
CTION:
Allow span gas to enter the sample port at the
rear of the instrument.
The value of
NOX STB may jump
significantly.
Wait until it falls back
below 0.5 ppb.
This may take several
minutes.
Press ENTR to change the
OFFSET & SLOPE values for both
the NO and NO
x
measurements.
Press EXIT to leave the calibration
unchanged and return to the
previous menu.
Analyzer
continues to cycle
through NO
x
, NO,
and NO
2
measurements .
The Model 200E analyzer is now ready for operation.
3.6.2. Interferences for NO
X
Measurements
The chemiluminescence method for detecting NO
X
is subject to interference from a number
of sources including water vapor (H
2
O), ammonia (NH
3
), sulfur dioxide (SO
2
) and carbon
dioxide (CO
2
) but the Model 200E has been designed to reject most of these interferences.
Section 10.1.5 contains more detailed information on interferences.
044100102 Rev A 27