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REINSTALLATION OF THE RANGE SELECTOR KNOB
If you removed the range selector knob for troubleshooting,
then follow the instructions below to reinstall it.
Place the PC board over the range selector knob and
fasten the knob to the PC board with a M2.3 x 8 screw.
CAUTION: Do not overtighten the screw. The knob
should be snug, but not loose. Turn back the M2.3 x 8
screw 1/2 turn. Slip the two shims under the knob (see
Figure L). If they do not slip in, turn back the screw
another 1/4 turn. Tighten the screw just enough so that
the shims can be pulled out. You should now have the
proper tension to hold the knob and contacts in place and
rotate the knob to the desired positions.
USING THE DIGITAL MULTIMETER
Familiarize yourself with your new digital meter by
taking readings of known resistances and voltages.
You will find that the readings will not be as accurate
on certain ranges for a given measurement. For
example, when measuring a low resistance on a
high range, the reading will show a short 0.00.
When measuring a high resistance on a low range,
the reading will show infinity 1.
important to use the correct range when measuring
voltages.
MEASURED
RESISTANCE
SHORT
(LEADS TOUCHING)
INFINITY
47W
270W
10kW
47kW
470kW
2.2MW
* RESISTANCE OF TEST LEADS
MEASURED
Table 2
Likewise, it is
200W
*
00.1
1 .
52.1
1 .
1 .
1 .
1 .
1 .
VOLTAGE
200mV
117VAC
1 .
100VDC
1 .
Bottom View of Selector Knob
Slide Contact
Shim
Table 1 shows an example of the readouts for
different values of resistance. Table 2 shows an
example of the readouts for 117VAC and 100VDC.
The shaded area indicates the most accurate range.
It must be remembered that the readings will shift
slightly when switching to a different range.
RANGE SETTING
2kW
20kW
200kW
.000
0.00
00.0
1.
1 .
1 .
.052
0.05
00.0
.267
0.26
00.2
1.
10.18
10.2
1.
1 .
52.7
1.
1 .
1 .
1.
1 .
1 .
Table 1
2V
20V
1.
1 .
1.
1 .
-26-
& Slide Contacts
2MW
20MW
.000
0.00
1.
1 .
.000
0.00
.000
0.00
.010
0.01
.052
0.05
.472
0.47
1.
2.12
200V
1000V
117.0
117
100.0
100
Figure L
Shim
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