Teledyne T200, Operation Manual, Page: 282 / 425

Troubleshooting & Service Teledyne API
– T200 NO/NO2/NOx Analyzer Operation Manual
280
12.9. FREQUENTLY ASKED QUESTIONS
The following list was compiled from the Teledyne API's Customer Service
Department‟s 10 most commonly asked questions relating to the T200 NOx Analyzer.
QUESTION ANSWER
Why does the
ENTR
button
sometimes disappear on the front
panel display?
Sometimes the
ENTR
button will disappear if you select a setting that is
invalid or out of the allowable range for that parameter, such as trying to set
the 24-hour clock to 25:00:00 or a range to less than 1 or more than 20000
ppb. Once you adjust the setting to an allowable value, the
ENTR
button
will re-appear.
Why is the
ZERO
or
SPAN
button
not displayed during calibration?
The T200 disables these buttons during calibration when the measured gas
concentration differs significantly from the span or zero gas concentration
value entered by the user. This prevents accidental recalibration of the
analyzer to an out-of-range response curve.
EXAMPLE: The span set point is 400 ppb but gas concentration being
measured is only 50 ppb.
How do I enter or change the
value of my Span Gas?
Press the
CONC
button found under the
CAL
or
CALS
buttons of the main
SAMPLE display menus to enter the expected NO
x
span concentration.
See Section 9.2.3.1 or for more information.
Can I automate the calibration of
my analyzer? Any analyzer with zero/span valve or IZS option can be automatically
calibrated using the instrument’s AutoCal feature.
Can I use the IZS option to
calibrate the analyzer? Yes. However, the accuracy of the IZS option’s permeation tube is only
±5%. To achieve highest accuracy, it is recommended to use cylinders of
calibrated span gases in combination with a zero air source.
How do I measure the sample
flow? Sample flow is measured by attaching a calibrated flow meter to the sample
inlet port when the instrument is operating. The sample flow should be 500
cm³/min

10%.
Section 13.3.12.3 includes detailed instructions on performing a check of
the sample gas flow.
Can I use the DAS system in
place of a strip chart recorder or
data logger? Yes. Section 7 describes the setup and operation of the DAS system in
detail.
How often do I need to change
the particulate filter? Once per week or as needed. Section 11 contains a maintenance schedule
listing the most important, regular maintenance tasks. Highly polluted
sample air may require more frequent changes.
06858E DCN7057