Model 200E Instruction Manual Operating Instructions
Table 6-2: Test Functions Defined
Display Parameter Units
Description
RANGE RANGE
PPB, PPM,
UGM, MGM
The full scale limit to which the analyzer’s analog outputs are
currently set. This is not the physical range of the instrument. If
the Auto range mode has been selected, two RANGE functions
will appear. If the IND (independent) range mode has been
selected, three RANGE functions will appear:
NOX STB STABILITY
PPB, PPM,
UGM, MGM
The stability is a standard deviation of the NO
X
concentration
over 25 samples, each recorded every 10 seconds. A low nox
stb value indicates low variability in NO
X
.
SAMP FLW SAMPLE FLOW
cm³/min
(cc/m)
The flow rate of the sample gas through the reaction cell. This
value is not measured but calculated from the sample pressure.
OZONE FL OZONE FLOW
cm³/min
(cc/m)
Flow rate of the O
3
gas stream as measured with a flow meter
PMT PMT Signal MV The raw output voltage of the PMT.
NORM
PMT
NORMALIZED
PMT Signal
MV
The output voltage of the PMT after normalization for auto-zero
offset and temperature/pressure compensation (if activated).
AZERO AUTO-ZERO MV
The PMT signal with zero NO
X
,
which is usually slightly different
from 0 V. This offset is subtracted from the PMT signal and
adjusts for variations in the zero signal.
HVPS HVPS V The PMT high voltage power supply.
RCELL
TEMP
REACTION CELL
TEMP
°C The current temperature of the reaction cell.
BOX TEMP
BOX
TEMPERATURE
°C The ambient temperature of the inside of the analyzer case.
PMT TEMP
PMT
TEMPERATURE
°C The current temperature of the PMT.
IZS TEMP
IZS
TEMPERATURE
1
°C
The current temperature of the internal zero/span option. Only
appears when IZS option is enabled.
MOLY
TEMP
CONV
TEMPERATURE
°C The current temperature of the NO
2
converter.
RCEL
REACTION CELL
PRESSURE
in-Hg-A
The current gas pressure of the reaction cell as measured at the
vacuum manifold. This is the vacuum pressure created by the
external pump.
SAMP
SAMPLE
PRESSURE
in-Hg-A
The current pressure of the sample gas as it enters the reaction
cell, measured between the NO/NO
x
and Auto-Zero valves.
NOX
SLOPE
NO
x
SLOPE - -
The slope of the current NO
x
calibration as calculated from a
linear fit during the analyzer’s last zero/span calibration.
NOX OFFS NO
x
OFFSET MV
The offset of the current NO
x
calibration as calculated from a
linear fit during the analyzer’s last zero/span calibration.
NO SLOPE NO SLOPE - -
The slope of the current NO calibration as calculated from a
linear fit during the analyzer’s last zero/span calibration.
NO OFFS NO OFFSET MV
The offset of the current NO calibration as calculated from a
linear fit during the analyzer’s last zero/span calibration.
NO2
NO
2
concentration
PPB, PPM,
UGM, MGM
The current NO
2
concentration in the chosen unit.
NOX
NO
x
concentration
PPB, PPM,
UGM, MGM
The current NO
x
concentration in the chosen unit.
NO NO concentration
PPB, PPM,
UGM, MGM
The current NO concentration in the chosen unit.
TEST TEST SIGNAL
2
MV Signal of a user-defined test function on output channel A4.
TIME CLOCK TIME hh:mm:ss The current day time for iDAS records and calibration events.
044100102 Rev A 43
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