Basic Electrostatics System
ES-9080B
12
®
5.
Use the push button to set the voltage to the desired range. The range setting refers to the
voltage input required to produce a full-scale meter deflection (e.g., a setting of 30 means
that a full-scale meter deflection indicates a voltage of 30 volts).
Important Points for General Operation:
1.
Between measurements, always press the ZERO button to discharge all current from the
electrometer.
2.
Shorting the test leads together is insufficient. There may still be stray charges within the
electrometer circuitry.
3.
For good results, it is essential that the electrometer be connected to an earth ground (a
water pipe, the ground wire from a 120 VAC socket, or the COM port on the electrostatics
voltage source). Only an earth ground provides a sufficient drain for excess charges that
may build up during an experiment. It is also helpful if the experimenter is grounded. Just
touch one hand to a good earth ground just before, or during measurements.
More information on taking accurate measurements is provided in the demonstrations.
