083730510A DCN8172
Teledyne API T500U CAPS NO
2
Analyzer with NumaView™ Software
111
Figure 5-14. Relay PCA Mounting Screw Locations
FREQUENTLY ASKED QUESTIONS
The following list was compiled from the Teledyne API's Technical Support Department’s
ten most commonly asked questions relating to the 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 deactivated during
calibration?
This happens 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?
See Section 4.2.1.2.
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 (Section 4.3).
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?
For accurate measurement, attach a calibrated volumetric flow meter to
the sample inlet port, and get a reading while the instrument is operating.
The sample flow should be as specified in Table 1-1. (To calibrate, use
the Utilities>Diagnostics menu; refer to Section 5.6.5.2).
How often do I need to change
the particulate filter?
Refer to the Maintenance Schedule in Table 5-1. Keep in mind that highly
polluted sample air may require more frequent changes.
Summary of Contents for T500U
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