Comptus A70-DL0, Инструкция по эксплуатации

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14
MAINTENANCE
Transmitter
It is recommended that the Transmitter be
checked for calibration each year. Refer to
Calibration section for details.
CALIBRATION
The instrument is fully calibrated at the factory
before shipment. The following procedure is
provided should adjustment be necessary in the
future.
Gain & Zero Adjustments
Potentiometer R34 sets the wind direction zero.
Potentiometer R40 sets the wind direction gain.
WIND DIRECTION TRANSMITTER
The adjustments may be sealed with electronic
grade silicon rubber to prevent tampering by
unauthorized personnel.
1. Connect a jumper between terminals 4 & 5 of
the terminal strip marked “WIND VANE”. This
simulates a signal corresponding to zero degrees of
azimuth.
2. Adjust the potentiometer marked “DIR.
ZERO” to produce a 4 ma loop current.
3. Connect a jumper between terminals 3 & 5
of the terminal strip marked “WIND VANE”.
This simulates a signal corresponding to 359
degrees of azimuth.
4. Adjust the potentiometer marked “DIR.
GAIN” to produce 20 ma of loop current.