Special Function Setup; Output Signal Reversal; Special - Inverting Output - Teledyne 2010A Operating Instructions Manual

4 Operation
5. Use the Δ∇ keys to set the proper value of calibration gas, and
Enter. Repeat this step for each cal-point number as it appears in
the Input (x) parentheses.
6. Repeat step 5 for each of the special calibration gases, from the
lowest to the highest concentrations. Press Escape when done.
To end the session:
If started with the RS-232, send:
st<enter>
st<enter>
to the analyzer from the computer.
If started through the front panel, turn the instrument off and back on.
Press the Enter key twice to return to the Analyze mode.

4.9 Special Function Setup

4.9.1 Output Signal Reversal

Some applications require a reversal of the output signals in order for the
4-20mA and 0-1 V DC output signals to correspond with the low and high end
of the concentration range. For example, if an application involves the analysis
of 85% oxygen in a background of argon by measuring the thermal conductivity
of the binary gas, the analyzer would normally be set up so that the 100%
oxygen (0% argon) concentration would correspond to the zero level (4mA 0 V)
of the output signal. Then, 85% oxygen (15% argon) would correspond to
20mA (1 V) in the signal output.
It may be convenient for the user to have the outputs reversed so that the
85-100% oxygen level outputs a 4-20mA (0-1 V) signal respectively. This can
be accomplished by reversing the data input to the custom settings. Not all
applications will require a reversing function, however, if this is desirable, it must
be specified at the time of purchase or alternatively, by substituting a linearizing
PC board with the reversal information contained therein. Contact the factory
for further information.

4.9.2 Special - Inverting Output

NOTE: If the unit has a range or ranges that specified >0 unit setup
for inverting.
The steps are:
1. Press RANGE key.
4-28 Part I Teledyne Analytical Instruments
Model 2010A