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Teledyne API N500 CAPS NO
X
Analyzer with NumaView™ Software
089770000 Rev 05
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 Enter button
sometimes disappear in some of
the menus?
Sometimes the Enter button will disappear if you input 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 outside its allowable limits.
Once you adjust the setting to an allowable value, the Enter 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.
How long does the sample pump
last?
The sample pump should last one to two years and the pump head should
be replaced when necessary. (Refer to Maintenance Schedule Table 5-1).
Why does my RS-232 serial
connection not work?
There are several possible reasons:
•
The wrong cable: please use the provided or a generic “straight-
through” cable (do not use a “null-modem” type cable) and ensure the
pin jumpers are correct (Section 2.3.1.4 under Serial Connection).
•
The baud rate of the analyzer’s COM port does not match that of the
serial port of your computer/data logger (Table 2-10).
How do I set up and use the
contact closures (Control Inputs)
on the rear panel of the
analyzer?
See Section 2.3.1.3.
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