ESI 250-DA - Procedure for Measuring Resistors

2.2
RESISTORS
2. 2,
1
MEASURING
RESISTORS
dSD
UNKNOWN RESISTOR
V
DC GENERATOR
VOLTAGE SWITCH
LOCK
GALVANOMETER
UNKNOWN RESISTOR
CONNECT
UNKNOWN
RESISTOR
Make good
contact
with the
terminals.
TO
L-R
TERMINALS
SET
DC
GENERATOR
VOLTAGE
SWITCH
TO
LOW
This applies
approximately
10 volts
to
the bridge.
UNLOCK
GALVANOMETER
Adjust the
zero
with the
zero
set
knob
if
necessary.
turn
amp
control
CLOCKWISE
This turns
on
the power supply.
The
red light
to
the left of the AMP
switch
should light.
TURN
THE
OSC
CONTROL
COUNTER
CLOCKWISE
FOR
DC
This
should
turn
off the green
fluorescent screen of the visual null
indicator.
SET
CIRCUIT
SELECTOR
SWITCH
TO
R X 1
OR
R X
10
For
resistors between
1.2
and 12
megohms, use
R
X
10
position.
SET
MAIN
DIAL TO
3.000
This makes
it
easier
to
find the
correct
range.
lailTI
250-DA
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