Troubleshooting Information - Teledyne 7300A Operating Instructions Manual

Infrared Gas Analyzer
The leftmost digit (under
tored. Use the UP/DOWN key to select the successive points.
The
the analyzer. You do not need to actually flow gas.
The
AL concentration of the span gas being simulated.
If the
ed. ESCAPE to return to the previous screen. Select and Enter
Calibration Mode screen.
There are two ways to linearize:
requires as many calibration gases as there will be correction points along the
curve. The user decides on the number of points, based on the precision re-
quired.
The manual mode only requires entering the values for each correction
point into the microprocessor via the front panel buttons. Again, the number of
points required is determined by the user.

4.3.8 Troubleshooting information

Accessing the HARDW_VAR function will allow a qualified technician
to get further information on the health of the analyzer. This is a complimentary
troubleshooting tool to SELF-TEST. Information displayed in the VFD display is
shown below:
Calib_factor = 5.00
AtoD_ave = 1289
lOffset[r][g] = 492
) is the number of the data point being moni-
value is the input to the linearizer. It is the simulated output of
value is the output of the linearizer. It should be the ACTU-
value shown is not correct, the linearization must be correct-
(This is the slope calibration value of the span,
default is 5.00)
(This is the raw ADC count, -262144 to
262143 are acceptable raw counts but must still
be evaluated by knowing what gas is flowing
through the analyzer)
(This is the current zero offset from the zero
calibration of the gain and range the instrument is
on at the moment. It should be between
10,000 to 10,000)
Teledyne Analytical Instruments
and : The auto mode
Operation 4
to
4-11