Textron Greenlee 77M-G Manuel D'instructions page 4

Description
The 77M-G, 77HP-G, and 77HP-G/6A Tone Generators are
intended to identify the conductor within a bundle, at a cross-
connect point, or at the remote end. These testers are housed
in high impact plastic cases, and each is powered by one
9 volt battery. Standard test leads include red and black rubber
insulated test clips and a snag-proof, four-conductor modular
cord and plug. (77HP-G/6A offers angled bed-of-nails clips.)
A three-position toggle switch controls the modes of operation,
and bi-colored Light Emitting Diodes (LEDs) display line polarity
for Lines 1 and 2 (Line 1 only for 77M-G). When a short circuit is
detected, an audible signal will be heard (77HP only). The tone
and short circuit test functions are only applied to Line 1 using
the modular plug.
A tone selector switch (Figure 3), located inside each unit and
accessible from the outside using a slender tool, may be used to
select a fast or slow warble tone output.
The test sets are compatible with all common Central Office
Switching Systems, and the output tone is isolated from DC
voltages.
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Figure 1. Features
Features include:
1. Battery compartment
2. Toggle switch
3. LEDs
4. Test leads
5. Modular cord
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