Instruction manual

Instruction Sheet
for the PASCO
Model ES-9049A
POWER SUPPLY
012-01568C
12/94
$1.00
Introduction
The PASCO Model ES-9049A Power Supply is a two
range supply providing all the necessary potentials for
PASCO electrostatics equipment.
Operating Instructions
Turn the unit ON by turning the VARIABLE control
knob clockwise.
Select the 30 VDC or 1000 VDC range using the OUT-
PUT switch. The center position of the switch
(STANDBY) will produce a zero output at the terminals,
regardless of the voltage control settings.
When using the 30 VDC range use the red and black
binding posts. The black binding post is connected to the
third prong (ground) on the power cord.
© 1989 PASCO scientific
This instruction sheet written/edited by: Dave Griffith
When using the 1000 VDC range use the black and green
binding posts. When the green binding post is used there
is a 100 MΩ resistor in series with the output. This elimi-
nates the hazard of shock if the green terminal is acciden-
tally touched. However, if one attempts to measure the
output of this terminal with a meter having less than sev-
eral hundred MΩ of input impedance the meter on the
ES-9049A and the measuring meter will not read the
same. This is due to the voltage drop across the 100 MΩ
resistor produced by the current needed to drive the
meter.
Voltage output is varied by the voltage control knob.
Specifications:
➀
Ranges:
a) 1000 VDC, less than 2% ripple peak-to-peak, un-
regulated (maximum short circuit current less than
0.01 mA)
b) 30 VDC at 20 mA, 0.3% ripple peak-to-peak, line
and load regulation to within 1%.
➁ Meter: Two scale, +/- 3% of full-scale accuracy.
➂ Power:
a) 110-130 VDC, 60 Hz
b) 220/240 VDC, 50 Hz
➃ Fuse:
a) 0.2 A, Slo-Blo. (110-130 VDC)
b) 0.1 A, Slo-Blo. (220/240 VDC)
➄ Dimensions: 17.5 x 13.5 x 6 cm