Model 360E Instruction Manual Operating Instructions
Table 6-2: Test Functions Defined
PARAMETER DISPLAY
TITLE UNITS MEANING
Range RANGE
RANGE11
RANGE21
PPB, PPM,
UGM, MGM
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 6.8.1 for more information.
O2 Range O2 RANGE % The range setting for the O2 Sensor
Stability STABIL PPB, PPM
UGM, MGM
Standard deviation of CO2 concentration readings. Data points are
recorded every ten seconds using the last 25 data points.
CO2 Measure MEAS MV The demodulated, peak IR detector output during the measure
portion of the CFG Wheel cycle.
CO2 Reference REF MV The demodulated, peak IR detector output during the reference
portion of the CFG wheel cycle.
Measurement /
Reference Ratio MR Ratio -
The result of CO2 MEAS divided by CO2 REF. This ratio is the
primary value used to compute CO2 concentration. The value
displayed is not linearized.
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 SAMPLE FL cc/min
Sample mass flow rate. This is computed from the differential
between the pressures measured up-stream and down-stream of the
sample critical flow orifice pressures.
Sample
Temperature SAMP TEMP C The temperature of the gas inside the sample chamber.
Bench
Temperature BENCH
TEMP C Optical bench temperature.
Wheel
Temperature WHEEL
TEMP C Filter wheel temperature.
Box Temperature BOX TEMP C The temperature inside the analyzer chassis.
O2 Cell
Temperature2 O2 CELL
TEMP2 C O2 sensor cell temperature.
Photo-detector
Temp. Control
Voltage PHT DRIVE mV The drive voltage being supplied to the thermoelectric coolers of the
IR photo-detector by the sync/demod Board.
Slope SLOPE -
The sensitivity of the instrument as calculated during the last
calibration activity. The SLOPE parameter is used to set the span
calibration point of the analyzer.
Offset OFFSET -
The overall offset of the instrument as calculated during the last
calibration activity. The OFFSET parameter is used to set the zero
point of the analyzer response.
O2 Sensor Slope
2 O2 SLOPE - O2 slope, computed during zero/span calibration.
O2 Sensor Offset
2 O2 OFFSET - O2 offset, computed during zero/span calibration.
Test channel
output signal TEST mV, mA Displays the signal level of the TEST analog output channel. Only
appears when the TEST channel has been activated.
Current Time TIME - The current time. This is used to create a time stamp on iDAS
readings, and by the AUTOCAL feature to trigger calibration events.
1 Only appears when the instrument’s reporting range mode is set for DUAL or AUTO
2 Only appears when the optional O2 sensor is installed.
To view the TEST Functions press the following Key sequence:
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