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Troubleshooting & Service Teledyne API - T100 UV Fluorescence SO2 Analyzer
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12.8. FREQUENTLY ASKED QUESTIONS (FAQS)
The following list contains some of the most commonly asked questions relating to the
T100 SO
2
Analyzer.
QUESTION ANSWER
Why is the ZERO or SPAN button not
displayed during calibration?
The T100 disables these buttons when the expected span or zero value entered by
the users is too different from the gas concentration actually measured value at the
time. This is to prevent the 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.-For more information, refer to Section
12.4.4 and Section 12.4.5.
Why does the ENTR button
sometimes disappear on the Front
Panel Display?
During certain types of adjustments or configuration operations, the ENTR button
will disappear if you select a setting that is nonsensical (such as trying to set the 24-
hour clock to 25:00:00) or out of the allowable range for that parameter (such as
selecting a DAS hold off period of more than 20 minutes).-Once you adjust the
setting in question to an allowable value, the ENTR button will re-appear.
How do I enter or change the value of
my Span Gas?
Press the CONC button found under the CAL or CALS menus of the main SAMPLE
menu to enter the expected SO
2
span concentration.-Refer to Section 3.4.4.1 or for
more information.
Why does the analyzer not respond to
span gas?
Section 12.4.4 has some possible answers to this question.
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.-However, the accuracy of the IZS option’s
permeation tube is ±5%. While this may be acceptable for basic calibration checks,
the IZS option is not permitted as a calibration source in applications following US
EPA protocols. -To achieve highest accuracy, it is recommended to use cylinders of
calibrated span gases in combination with a zero air source. Teledyne API offers a
zero air generator Model 701 and a gas dilution calibrator Model T700 for this
purpose.
What do I do if the concentration on
the instrument's front panel display
does not match the value recorded or
displayed on my data logger even if
both instruments are properly
calibrated?
This most commonly occurs for one of the following reasons: -A difference in circuit
ground between the analyzer and the data logger or a wiring problem;-A scale
problem with the input to the data logger. -The analog outputs of the T100 can be
manually adjusted to compensate for either or both of these effects, refer to 5.9.3.4;
-The analo
g outputs are not calibrated, which can happen after a firmware upgrade.
-Both the electronic scale and offset of the analog outputs can be adjusted (refer to
Section 5.9.3.2). Alternately, use the data logger itself as the meterin
g device during
calibrations procedures.
How do I perform a leak check? Refer to Section 11.3.6.
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 650 cm³/min
10%. Section 11.3.6 includes detailed instructions on p
e
rforming a check of the
sample gas flow.
How often do I need to change the
particulate filter?
Once per week. Table 11-1 contains a maintenance schedule listing the most
important, regular maintenance tasks.
What is the averaging time for an
T100?
The default averaging time, optimized for ambient pollution monitoring, is 240
seconds for stable concentrations and 20 seconds for rapidly changing
concentrations; Refer to 13.7.1 for more information.
My analyzer has the optional, user -
configurable analog output channels.
Instructions for this can be found in the Manual Addendum for Configurable Analog
Output, PN 06270.
06807C DCN6650