ESI 250-DA - Checking D-Q Rheostats R24 and R21

set the controls as follows:
6
. 2.
10.
Z
To
check
^24
^21
*
CONTROL SETTING
DETECTOR
switch
AC
OR
EXT DET
GENERATOR
switch
EXT GEN
AMP
control
Dot
up
OSC
control
Dot
up
MULTIPLIER
switch
C
X
0,1
pf
Be
sure
to use this setting
C
TERMINALS
Decade resistor
in
series
with
0,
1
pf standard capacitor
To
check
1
^
24
*
CIRCUIT SELECTOR switch
to
C SERIES
D X 0,01,
The
resulting
D-Q DIAL readings should
be as follows:
RESISTANCE
IN SERIES
WITH 0,
1
pf
CAPACITOR
D-Q DIAL READING
18 Q
1.0
82 12
5.0
161
n
10,0
To
check R^^,
set the CIRCUIT
SELECTOR
switch to
C
SERIES
D X 0,1.
The
resulting D-Q DIAL readings
should
be as
follows:
RESISTANCE IN
SERIES
WITH
0.1
pf
CAPACITOR
D-Q DIAL
READING
—
—
—
.
161
n
1.0
798
Q 5.0
1594
12
10.0
If
these
tests
indicate
possible
defects in the
D-Q rheostat,
remove
the
bridge
from
the case,
disconnect
the rheostat
and
check
the
resistance
values
individually.
mill]
250-DA
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