3D. Wiring And Calibration - gefran I3 Series Instruction Manual

Connections
The sensors have to be connected as shown in the diagram on the next page.
To obtain a higher immunity from field noise, connect the cable shield to the female connector case on sen-
sor side.
Calibration procedure
Bring the system to the working temperature with the transducer installed and connected to the measure-
ment instrument without any pressure applied.
The measurement chain connected to the transducer is calibrated as follows:
1) To reset the offset on the instrument by eliminating the thermal drift with the autozero function. With the
sensor installed and the extruder at working temperature, wait until the temperature itself is stable, with
a possible variation of +/- 1°C. Consequently Autozero can be activated.
This delay gives the system time to recognize and compensate all the signal drifts caused by tightening
and temperature.
Additional Autozero activations could be run once the temperature stability is reached, with +/- 1°C of
possible variation.
2) Calibrate the instrument and have it display the calibration value shown on the transducer data plate
(80% of full scale). With the external autozero function the calibration procedure is not feasible.
3) If the instrument does not exactly indicate zero, repeat points 1) and 2).
In this way, the instrument is calibrated to give the exact indication in the chosen engineering unit.
80175G_MAN_I3-IE-IN-IX_I7_11-2018_ENG
3d - Wiring and calibration
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