There are two external resistance control ranges,
0~5kΩ and 0~10kΩ, depending on the F-97
configuration. See page 110 for details.
The output voltage (0 to full scale) can be
controlled with the external resistance rising
0kΩ~5kΩ/0kΩ~10kΩ or falling
5kΩ~0kΩ/10kΩ~0kΩ.
Rising:
For 0kΩ~10kΩ: Output voltage = full scale voltage
× (external resistance/10)
For 0kΩ~5kΩ: Output voltage = full scale voltage ×
(external resistance/5)
Falling:
For 10kΩ~0kΩ: Output voltage = full scale voltage
× ([10-external resistance]/10)
For 5kΩ~0kΩ: Output voltage = full scale voltage ×
([5-external resistance]/5)
The falling resistance configuration is recommended
for safety reasons. In the event that the cables become
accidentaly disconnected (high Ω), the voltage output
will drop to zero. Under similar circumstances using
the rising resistance configuaration, an unexpectedly
high voltage would be output.
If swtiches are used to switch between fixed
resistances, use switches that avoid creating open
circuits. Use short-circuit or continous resistance
switches.
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