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INSTRUCTION MANUAL
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77M-G, 77HP-G,
and 77HP-G/6A
Tone Generators
Read and understand this material before
operating or servicing this equipment.
Failure to understand how to safely operate
this tool could result in an accident causing
serious injury or death.
52047312 REV 3
© 2014 Greenlee Textron Inc.
GlobalTestSupply
www.
6/14
.com
sales@GlobalTestSupply.com
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Summary of Contents for Textron Greenlee 701K-G
- Page 1 Failure to understand how to safely operate this tool could result in an accident causing serious injury or death. 52047312 REV 3 © 2014 Greenlee Textron Inc. 6/14 GlobalTestSupply www. .com Find Quality Products Online at:...
- Page 2 Do not discard this product or throw away! All specifications are nominal and may change as design improvements occur. Greenlee Textron Inc. shall not be liable for damages resulting from misapplication or misuse of its products. KEEP THIS MANUAL GlobalTestSupply www.
- Page 3 Electric shock hazard: • Do not expose this unit to rain or moisture. Contact with live circuits could result in severe injury or death. • Use this unit for the manufacturer’s intended purpose only, as described in this manual. Any other use can impair the protection provided by the unit.
- 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.
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Page 5: Purpose Of This Manual
Safety Safety is essential in the use and maintenance of Greenlee tools and equipment. This instruction manual and any markings on the tool provide information for avoiding hazards and unsafe practices related to the use of this tool. Observe all of the safety information provided. - Page 6 Identifying Tip and Ring (Polarity Test) Telephone service must be present to perform this test. In the OFF (4 VOLTS) position, connect the black test lead to ground and the red test lead to each side of the line to be tested. •...
- Page 7 Supplying Talk Power Connect the test leads in series with a telephone test set (buttset) and the inactive wire pair (Figure 2). Move the toggle switch to the SHORT position to supply the “dead” line with talk power. Additional test sets may be added, in series (red clip to black clip), to increase talk power supply when needed (Figure 2).
- Page 8 Sending Tone With the test set in the TONE position, connect the modular plug or the red/black leads to the subject wire(s). An internal slide switch (accessible from the outside using a slender tool) allows the selection of either a fast or slow warble tone output (Figure 3).
- Page 9 identified, separate the two wires. The signal will be as loud on each of the pair wires and will NULL halfway between the two wires. Figure 4a. Cable Tracing Figure 4b. Pair Tracing Reception of tone will be strongest on the subject wire(s). Shorting the leads of a tone carrying wire pair will cancel the tone signal and also confirm that the pair has been identified.
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Page 10: Specifications
Specifications Electrical Talk Battery (into 600 Ω): 4.6 VDC Output Power (into 600 Ω): +10 dBm Resistive Short Visual Indication: <10 kΩ Resistive Short Audio Indication (77HP-G and 77HP-G/6A only): <200 Ω Output Frequency (nominal): Tone: Alternating 890/960 Hz Warble Rate: Slow: 1.3 Hz Fast: 6 Hz Voltage Protection (into a 600 Ω... -
Page 11: Maintenance
Maintenance Electric shock hazard: Before opening the case, remove the test leads from the circuit and shut off the unit. Failure to observe this warning could result in injury and can damage the instrument. Battery Replacement 1. Remove screw from rear of set holding back cover. 2.
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