Operating Instructions
Physical Features
2
2-7
Table 2-1. Controls, Indicators and Connectors
Item
No.
Name Function
1
*
Battery Eliminator
Connector
External input power connector for use with
the A81 Battery Eliminator accessory.
2 Function Buttons:
Hz, dB,
,
REL
Push buttons that toggle on or toggle off the
‘secondary functions: frequency, dB, visible
or audible continuity, or relative. These
functions are selected in conjunction with the
primary measurement functions (see items 7
and 8).
3 Battery
Compartment and
Cover
Cover for the 9V battery and the current fuse
F1.
4V Ω S Input
Connector
Protected test lead connector used as the
high input for all voltage, conductance,
resistance, continuity, frequency
measurements and diode test. All test lead
connectors accept standard or safety-
designed banana plugs.
5 COMMON Input
Connector
Protected test lead connector used as the
low or commom input for all measurements.
6 A Input Connector Protected test lead connector used as the
high input for current measurements.
7 Function
Switches: A,V,
Ω,S
Interlocked switches that are used in
conduction with the input connectors to select
the measurement functions. Pushing one
switch releases the other, or both may be
pushed together.
8 AC/DC Function
Switch
Push-on/push-off switch is used to select ac
or dc for current or voltage measurements.
(Does not affect selection of diode test,
resistance, or conductance functions).
9 Range Switches Interlocked switches that are used to select
ranges. Pushing a switch selects the
corresponding range and released other
switch depressions. Also used to select
conductance and the diode test.
* For safe operation, fully insert the A81.
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