Escort 3016B - Manual (Page 26)

3 Initialisation
Page 3.6
4 wires wiring :
You have to choose the input channel type 2, 3 or 4 wires in the Channel set up function.
3.4.4. Measure of intensity
Isolated input module: it is possible to measure intensities with a shunt between the red and black
terminals of the considered input.
Non-isolated differential input module: it is possible to measure intensities with a shunt between
the "+" and "-" terminals of the considered input.
In this case, choose the "Current" type among the parameters of the considered channel.
Connect the measure cables to the terminals of the shunt.
Collected results are directly displayed in Amperes or milli-Amperes according to the range of the
considered channel.
3.4.5. Connection of the grounding
For measuring very small voltages, problems of spurious voltages from electromagnetic fields or
common mode voltagess become all the more important than the selected sensibility is higher. Thus,
it is important that the outer wiring is made correctly.
Causes for such difficulties are various:
- uncertainty about the true origins of the perturbing voltages and impedances when they are
generated
- uncertainty about the spurious capacitances of the circuits and wiring
- no access to the injection point of the common mode voltage of the network that provides
the signal to register
- non-conformity of some appliances with the current norms
- sometimes even ignorance of the source impedances of the signal to register
YOU SHOULD ABIDE BY THE FOLLOWING INSTRUCTIONS
1/ The mechanical ground of every appliances should be linked to the earth.
The mechanical ground of the recorder is linked to the earth through the mains cable.
However, if the other appliances in the system are not equipped the same way, you d better gather
their mechanical ground with the ground of the recorder: you can access it through a union liner at
the rear of the appliance.
PT100