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Switch off the Instrument
1) Remove the jumper lead JP1. This is VITAL.
Should the instrument be switched on with JP1
In position, the calibration is lost.
2) Replace the instrument cover.
The instrument is now ready for normal use. The central processor is software
driven and no other adjustments or modifications should be attempted. If it is
necessary for the supplier to re-calibrate an instrument in consequences of
unauthorised persons so doing, a charge may be made accordingly
5. ANALOGUE (RE-TRRANSMISSION) OUTPUT
This output varies linearly between 0 and 1 volt dc. The output will be 0V whenever the
reading of the instrument is at or below the zero parameter as set by front panel button
pushes or RS232 commands. The output will be at 1 V whenever the reading is at the
span parameter as set by the user. Any reading between zero and span will result in an
Analogue output signal proportional to the position of the reading with respect o the
defined zero and span values. To set-up the output values:
1) Zero: Press “SHIFT” and “ZERO s” to raise the value (in current units) at which
a zero output will occur.
Press “SHIFT” and “ZERO tt ” to reduce the value in a similar way.
2) Span: Press “SHIFT” and “SPAN ss ” to raise the value (in current units)
at which a SPAN (1V) output will occur.
Press “SHIFT” and “SPAN tt ” to reduce the value in a similar way.
The size of the increment is 0.1 Ohm. This is necessary so as to eliminate the
requirements of working from degrees in temperature (K, C or F) back to Ohms. If
setting up in degrees, some odd looking numbers may occur on the display.
The output falls to 0V in the event of the selected span value being exceeded; this is
done to indicate such a condition.