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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
5.3.4.1 Single Range
This range option selects a single range for all output channels (NO, NO
x
, NO
2
) of the M200A.
To select Single Range press SETUP-RNGE-MODE-SING, then press ENTR. To set the value
for the range press SETUP-RNGE-SET, enter the full scale range desired from 50 ppb to 20,000
ppm, then press ENTR.
5.3.4.2 Auto Range
Auto Range allows the NO, NO
x
, NO
2
outputs to automatically range between a low range and a
high range. There is only one low range and one high range for all outputs. The Hi range mode is
signaled by a bit on the STATUS option, see Table 5-5-10. When the instrument output reaches
98% of the low range, it will automatically switch into Hi range. In Hi range, when the output
decreases to 75% of low range, it will change to the lower range. If you select a Hi range that is
less than Low range, the M200A will remain locked in Low range and behave as a Single Range
instrument.
To set up Auto Range press SETUP-RNGE-MODE-AUTO, then press ENTR. To set the values
press SETUP-RNGE-SET. The M200A will prompt you for LO, then HI which is the lower and
upper ranges of Auto Range. Key in the values desired, then press ENTR.
5.3.4.3 Independent Ranges
Independent Ranges allows you to select different ranges for NO, NO
x
, and NO
2
.
To set up Independent Ranges press SETUP-RNGE-MODE-IND, then press ENTR. To set the
values press SETUP-RNGE-SET. The M200A will prompt you for the range of NO, NOx and
NO
2
channels. Key in the desired range for each channel, press ENTR after each value.
5.3.4.4 Dilution Ratio
The dilution feature allows the M200A display the undiluted concentration of a sample collected
with a stack dilution probe. The dilution probe dilutes the gas by a fixed ratio so the analyzer is
actually detects a much lower concentration than is actually present in the stack.
The software scales the diluted sample gas concentration readings so that the outputs show the
actual stack concentrations. Also, when calibrating the instrument or setting the ranges, the
values selected are scaled to reflect the actual stack concentrations. The scaled readings are sent
to the display, analog outputs, and RS-232 port.
5-17
PRINTED DOCUMENTS ARE UNCONTROLLED