Simpson 270-5, Инструкция по эксплуатации

Страница: 10 / 28

10
3. CONTROLS, JACKS AND INDICATORS
All operating and adjustment controls, jacks and indicators for the Simpson 270-
5 are described in this section. Become familiar with each item before operating
the Instrument.
3.1 Front Panel Description
The front panel controls, jacks and indicators are described in Table 3-1 and illus-
trated in Figure 3-1.
Table 3-1. Controls, Jacks and Indicators
1. Front Panel: The 270-5 Volt-Ohm-Milliammeter is a large, easy-to-
read 4-1/4” indicating Instrument. Switch positions
and circuit jacks are marked in white characters for
easy reading.
2. Range Switch: The range switch may be rotated in either direction to
select the desired voltage, current, or resistance range
position.
3. Function Switch: The function switch has four positions: Off/Transit, +DC,
-DC and AC. To measure DC current or voltage, set
the function switch at the -DC or +DC position, de-
pending on polarity of the signal applied across test
leads. To measure AC voltage set the function switch
to the AC position. For resistance measurement, the
switch may be set in either the +DC or -DC position.
The polarity of the internal ohmmeter battery voltage
at the (+) positive jack is identical to the function switch
polarity setting and opposite at the (-) common jack.
COMMON COMMON
ALL TERMINALS IKV. MAX
270
2.5V.
1V.
10V.
50V.
AMPS
250V.
500V.
1000V
A.C.
1000V.
A.C. D.C.
WARNING
READ MANUAL BEFORE USE
Figure 3-1. Controls, Indicators and Connector