Instruction Sheet
for the PASCO
Model ES-9077
ELECTROSTATICS VOLTAGE SOURCE
012-07038B
Introduction
The ES-9077 is a high voltage, low current power
supply designed exclusively for experiments in
electrostatics. It has outputs at 30 volts DC for
capacitor plate experiments, and fixed 1 kV, 2 kV, and
3 kV outputs for Faraday ice pail and conducting
sphere experiments. With the exception of the 30 volt
output, all of the voltage outputs have a series
resistance associated with them which limit the
available short-circuit output current to about 8.3
microamps. The 30 volt output is regulated but is
capable of delivering only about 1 milliamp before
falling out of regulation.
Equipment Included:
• Voltage Source
• Red/black, banana plug to spade lug cable
• 9 VDC power supply
Specifications
Ranges:
• Fixed 1000, 2000, 3000 VDC ±10%, unregulated
(maximum short circuit current less than 0.01
mA).
• 30 VDC ±5%, 1mA max.
Power:
• 110-130 VDC, 60 Hz, ES-9077
• 220/240 VDC, 50 Hz, ES-9077-220
Dimensions:
• 5 1/2” X 5” X 1”, plus AC adapter and red/black
cable set
Operation
When using the Electrostatics Voltage Source to power
other electric circuits, (like RC networks), use only the
30V output (Remember that the maximum drain is 1
mA.).
Use the special high-voltage leads that are supplied with
the ES-9077 to make connections. Use of other leads
may allow significant leakage from the leads to ground
and negatively affect output voltage accuracy.
IMPORTANT: To prevent the risk of
electric shock, do not remove the cover
on the unit. There are no user
serviceable parts inside. Refer servicing
to qualified service personnel.
