Teledyne 9110TH - Nitrogen Oxides Analyzer User Manual
Page 75
Operating Instructions
Model 9110TH NOx Analyzer
Teledyne Analytical Instruments
55
in one of the DAS channels (Section 4.7) for data analysis or output on one of the
configurable analog outputs.
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.