Instruction manual

012-03175E
2
charge or voltage. Set the FUNCTION switch to the
desired voltage 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).
scientific
OUTPUT
GND
INPUT
Model ES-9054B ELECTROMETER
PUSH
TO
ZERO
POWER
OFF
ON
FUNCTION
3
10
30
100
B1 B2
ZERO ADJUST
D
C
V
O
L
T
S
ZERO
LOCK
Mechanical zero adjust screw
(adjust with power off)
Select voltage range
(3, 10, 30, or 100
volts full scale) or
test batteries
(B1 and B2)
0-3.6 volts for driving
a projection meter
Setup
① Before turning on the electrometer, check that the
meter reads zero. If not, turn the Mechanical Zero
Adjust screw, located just below the meter face, un-
til it does.
② Slide the POWER switch to the ON position.
③ Check the batteries:
a. Turn the FUNCTION switch to B1. The meter
pointer should read to the left of the B1 line at
the bottom of the meter face. If the pointer falls
within the area labeled B1, see the battery re-
placement section at the end of this manual.
b. Turn the FUNCTION switch to B2. The meter
pointer should read to the right of the B2 line at
the bottom of the meter face. If the pointer falls
within the area labeled B2, see the battery re-
placement section at the end of this manual.
④ Zero the meter:
a. Turn the FUNCTION switch to 3.
b. Turn the Zero Switch to the ZERO LOCK set-
ting.
c. Adjust the ZERO ADJUST knob so the meter
reads zero volts.
⑤ Turn the Zero Switch to the PUSH TO ZERO set-
ting.
⑥ Connect the test lead to the INPUT connector of the
electrometer.
⑦ Connect the GND post of the electrometer to an
earth ground.
You’re now ready to use the electrometer to measure
Important Points for General Operation:
① Between measurements, always press the Zero
Switch to discharge all current from the electrom-
eter. (The Zero Switch must be in the PUSH TO
ZERO setting.) Shorting the test leads together is
insufficient. There may still be stray charges
within the electrometer circuitry.
② When adjusting the zero point of the electrom-
eter, always turn the Zero Switch to the ZERO
LOCK position.
③ For good results, it is essential that the elec-
trometer be connected to an earth ground (a water
pipe or the ground wire from a 120 VAC socket).
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 while, or just before, making measurements.
Figure 1 Front Panel Controls
Zero Switch: In PUSH TO ZERO
setting, pushing knob will
discharge the electrometer
Zero meter (zero
switch should be in
ZERO LOCK position)
Connect test lead here
Connect to earth ground