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Operating Instructions Teledyne API - Model T200H/T200M Operation Manual
72
Table 4-2: Test Functions Defined
DISPLAY PARAMETER UNITS
DESCRIPTION
Analog output
range
configuration
A1:NXCNC1=100 PPM
A2:N0CNC1=100 PPM
A3:N2CNC1=25 PPM
A4:NXCNC2=100%
These functions show the default settings for the enabled analog
output channels. See section 4.13.4 for more information.
NOX STB STABILITY PPM, 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 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.
CONV TEMP
CONVERTER
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 PPM, MGM The current NO
2
concentration in the chosen unit.
NOX NO
x
concentration PPM, MGM The current NO
x
concentration in the chosen unit.
NO NO concentration PPM, 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 DAS records and calibration events.
07270D DCN7141