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Basic Operation Teledyne API T803 CO2/O2 Analyzer Operation Manual
60
Table 4-2: Test Functions Defined
PARAMETER DISPLAY TITLE UNITS DEFINITION
Range
RNG
RN1
RN2
%
The full scale limit at which the reporting range of the analyzer is
currently set. THIS IS NOT the Physical Range of the instrument.
See Section 5.4.1 for more information.
Stability
STB
%
Standard deviation of CO
2
concentration readings. Data points are
recorded every ten seconds using the last 25 data points. This
function can be reset to show O
2
or CO
2
stability.
Sample Pressure
PRES
In-Hg-A
The absolute pressure of the Sample gas as measured by a
pressure sensor located inside the sample chamber.
Sample Flow
SAMP FL
cm
3
/min
Sample mass flow rate as measured by the flow rate sensor in the
sample gas stream.
CO
2
Sensor
Slope
CO2 SLOPE
- CO
2
slope, computed during zero/span calibration.
CO
2
Sensor
Offset
CO2 OFST
- CO
2
offset, computed during zero/span calibration.
Box Temperature
BOX TEMP
C
The temperature inside the analyzer chassis.
CO
2
Cell
Temperature
CO2 CELL
TEMP
C
The current temperature of the CO
2
sensor measurement cell.
O
2
Cell
Temperature
O2 CELL TEMP
C
The current temperature of the O
2
sensor measurement cell.
O
2
Sensor Slope
O2 SLOPE
- O
2
slope, computed during zero/span calibration.
O
2
Sensor Offset
O2 OFST
- O
2
offset, computed during zero/span calibration.
Current Time
TIME
-
The current time. This is used to create a time stamp on DAS
readings, and by the AUTOCAL feature to trigger calibration events.
4.3. CALIBRATION MODE
The T803 will switch into calibration mode when the user presses the CAL
button. In this mode the user can, in conjunction with introducing zero or span
gases of known concentrations into the analyzer, cause it to adjust and recalculate
the slope (gain) and offset of the its measurement range. This mode is also used
to check the current calibration status of the instrument.
Section 9 provides more information about setting up and perform
ing standard
calibration operations or checks.
Note
It is recommended that span calibration be performed at 80% of full scale of
the analyzer’s currently selected reporting range.
EXAMPLES:
If the reporting range is set for 0 to 50%, an appropriate span point would
be 40%.
If the of the reporting range is set for 0 to 100%, an appropriate span point
would be 80%.
07276B DCN6418