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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
If an ammonia permeation tube is being used, substitute the molecular weight of NH
3
(17
g/mole) for that of NO
2
.
The temperature is set at 50.0
o
C. Check SETUP-MORE-VARS and scroll to the IZS-SET
variable to verify that the temperature is properly set. It should be set to 50
o
C with over-and-
under temperature warnings set at 49
o
C and 51
o
C. There is a 60 cc/min flow across the
permeation tube at all times to prevent build-up of NO
2
gas in the tubing.
If desired, the output of the permeation tube can be adjusted by adjusting the oven temperature
up or down slightly. The adjust increment is 0.1
o
C to facilitate small adjustments of the setpoint
temperature.
WARNING
Do not leave instrument turned off for more than 8 hours
without removing the permeation tube. Do not ship the
instrument without removing the permeation tube. The
tube continues to emit NO
2
, even at room temperature
and will contaminate the entire instrument.
6-6
PRINTED DOCUMENTS ARE UNCONTROLLED