The 600LS test set is housed in a grey and blue plastic case. Red and black test leads are provided, which are equipped with alligator clips and are permanently attached to the set.A four conductor modular plug and cord, plus two light emitting diodes (LEDs), provide a modular polarity test. A six position slide switch controls the modes of operation, and there is a three position slide switch for testing each line at the modular plug.
The tone, level, resistance and capacitance features are powered by one internal 9 volt battery. The addition of a second 9 volt battery increases talk battery supply over original designs. (See Fig. 13) The polarity test feature is line powered.
The 600LS test set provides the following features:
Tone
A two tone audio trace signal is used to identify cable pairs, drop wires and I/O wire pairs and for proving continuity of single conductors.The signal will also radiate with sufficient strength to be detected by a lineman's test set or an inductive amplifier.
Level
This position is for checking line condition. No tone indicates a dead line or reversed polarity (0V-2V). An alternating (Hi-lo) tone indicates an active line off-hook (2V-28V).A steady tone indicates an active line not in use (28V-48V).
Battery
Approximately 18 volts of talk battery is provided for two way communication, when two batteries are installed.
Resistance
This feature provides an audible indication of various levels of circuit and insulation resistance. With the test leads connected to a low resistance circuit, a rapid series of beeps is produced by the test set. As the resistance of the circuit being tested increases, the time interval between beeps also increases
Capacitance
An audible indication of circuit capacitance is produced by the internal speaker.This test can be used to indicate the amount of capacitance on a line
PolarityTest - Two 2-color LEDs provide visible indication of central office battery polarity present at a modular connector. Ringing current is indicated by a red/green flickering LED (appears yellow). (See Polarity Testing)
Modular Test Selector Switch - The above tests, except polarity, may be performed on Line 1 or Line 2 through the modular cord. (See Modular Line Testing)
Calibration
In resistance mode, an internal resistor valued at 1meg ohm is provided for comparison to the fault resistance of the circuit or facility being tested.
Operation
All tests and operations outlined in the following paragraphs are to be conducted with central office battery and any other source of electrical current disconnected from the facilities under test.This does not apply to level and line polarity tests
Features
- Our most comprehensive tone test set
- Traditional alternating tone signal for wire identification
- Audible line condition testing (level) indicates dead, working and off-hook lines
- Line 1 and 2 polarity testing using 4-conductor modular plug
- Improved talk battery supply for communication over inactive pairs
- Tone and test functions using either modular plug or 24" alligator clip leads
- Audible resistance level measurement
- Audible capacitance level measurement
- Battery operated (9V not included)