Appendix A - Electrical Calibration; A1 Equipment Required; A2 Preparation - ABB 4600 Series Operating Instructions Manual

APPENDIX A – ELECTRICAL CALIBRATION
Note. The instrument is calibrated by the company prior to despatch and an electrical calibration should be carried out
if the instrument's accuracy is suspect suitably calibrated test equipment is available.
only and

A1 Equipment Required

a) Millivolt source (cell input simulator), –20.0 to 180.0mV.
b) Millivolt source (temperature input simulator), 10.0 to 40.0mV.
c) Digital voltmeter (current output), 0 to 20mA.
d) Thermometer, to measure ambient temperature.

A2 Preparation

a) Switch off the mains supply. Disconnect the probe and retransmission output terminations from the instrument – see Fig. 4.4
or 4.5.
b) Connect the millivolt sources and the milliammeter to the appropriate terminals – see Fig. 4.4 or 4.5.
c) Switch on the mains supply to the instrument and allow ten minutes for the circuits to stabilize.
d) Select the and proceed as detailed in Section A3.
Electrical Calibration Page
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