Teledyne GFC-7001E - Trace CO Analyzer - Manual (Page 144)

Advanced Features Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments 144
7.4.6. SELECTING A TEST CHANNEL FUNCTION FOR OUTPUT A4
The test functions available to be reported are listed in Table 7-10:
Table 7-10: Test Channels Functions available on the GFC 7001E/EM’s Analog Output
TEST CHANNEL DESCRIPTION ZERO FULL SCALE
*
NONE TEST CHANNEL IS TURNED OFF.
CO MEASURE
The demodulated, peak IR detector output
during the measure portion of the GFC Wheel
cycle.
0 mV 5000 mV
CO REFERENCE
The demodulated, peak IR detector output
during the reference portion of the GFC
Wheel cycle.
0 mV 5000 mV
SAMPLE PRESS
The absolute pressure of the Sample gas as
measured by a pressure sensor located inside
the sample chamber.
0" Hg 40 "Hg
SAMPLE FLOW
Sample mass flow rate as measured by the
flow rate sensor in the sample gas stream.
0 cm 3 /m 1000 cm 3 /m
SAMPLE TEMP
The temperature of the gas inside the sample
chamber.
0 C 70C
BENCH TEMP Optical bench temperature. 0 C 70C
WHEEL TEMP GFC Wheel temperature. 0 C 70C
O
2
CELL TEMP
The current temperature of the O
2
sensor
measurement cell.
n 70 C
CHASSIS TEMP The temperature inside the analyzer chassis. 0 C 70C
PHT DRIVE
The drive voltage being supplied to the
thermoelectric coolers of the IR photo-
detector by the Sync/Demod Board.
0 mV 5000 mV
*
Maximum test signal value at full scale of test channel output.
Once a function is selected, the instrument not only begins to output a signal on the analog output, but also adds
TEST to the list of test functions viewable via the front panel display.