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ELECTRODING
GENERATOR CABLE LOCATOR
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5915 Electroding
Generator Cable Locator.
The Electroding
Generator, type 5915, has been developed with British Telecom to
locate Submarine Telephone Cables. The method employed is the well
established electroding technique.
The unit is self-contained, desk
top mounting, enabling tests to be carried out without the power feed
connected to the cable under test.
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Electroding Generator Cable
Locator
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Price: |
Contact us for
pricing |
| Phone:
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253-927-6186
866-318-6186 |
| Fax:
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253-927-6189 |
| email:
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sales@hotektech.com |
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The 5915
Electroding Generator is intended as an aid to cable repair
ships in locating and identifying telephone cables. The electroding
Generator energizes the Submarine Cable with a low frequency sine
wave signal of up to 500mA at 500 Volts peak to peak.
The
Electroding Generator is located in the terminal station normally
nearest to the fault area and connected to the cable under test by
means of two safety probes built-in the instrument.
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Electroding Generator Cable
Locator Principles of Operation
The Electroding Generator is a low frequency oscillator with a sine
wave output capable of delivering up to 500mA at 500 Volts peak to
peak at any frequency from 5Hz to 99.9Hz.
The frequency is selected by
digital thumbwheel switches, Peak current is set via a front panel
rotary control.
The Current and Voltage levels are clearly displayed
on Front Panel Precision Analogue Meters.
The current waveform is controlled to be sinusoidal. The test
current has a DC bias to improve the sensitivity detection over longer
distance. The test current can be applied in either the forward
direction only or in the reverse or forward bias, as required. Longer
cable can normally be electroded by energizing in the reverse
direction. A crystal controlled oscillator ensures that the frequency
does not drift while testing is in progress.
Output connections are made by permanently connected probes, which
are fully shrouded.
A safety circuit disables the Generator output
whilst the probes are being applied to the cable under test.
A special
compartment on the rear of the instrument is provided for stowing the
output probes when not in use.
A frequency monitor point (square wave at signal frequency) is
provided on the rear on the instrument. Output level is TTL
compatible.
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Specifications
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| Output |
Continuously adjustable current
regulated d.c. – sine wave modulated. |
| Current Range |
Minimum 75mA modulated at ± 25mA
(50mA – 100mA pk-pk).
Maximum 275mA modulated at ± 225mA
(50mA – 500mA pk-pk). |
| Current Regulation |
< 5% |
| Current Control |
Continuously adjustable by 10-turn
potentiometer. |
| Mains Switching |
Key operated. The key is removable
only in the off position. |
| Voltage |
500V peak max. |
| Polarity |
Output polarity is selected by
means of a 3 position key switch (Positive, Off, Negative).
The key is removable in any position. |
| Monitoring |
Both current and voltage are
continuously monitored by individual front panel meters of
accuracy 3% F.S.D. |
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Modulation Frequency
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| Range |
5Hz to 99.9Hz, selected in 0.1Hz
steps. |
| Accuracy |
± 0.01Hz |
| Stability |
0.03% Long term (12hr). 0.003% Short
term (10min). |
| Output distortion |
THD 5% |
| Controls |
Adjustable by thumbwheel edge
switches. |
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Power requirements
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105v to 125v or 210v to 250v; 50Hz to 60Hz, (selected via rear
panel).
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Power applied by operation of a key switch. Key is removable in
the “OFF” position only.
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Mains input circuit is fused. Input is via I.E.C. socket.
Weight and
dimensions
Size 300H x 512D x 470W
(mm) approx.
Weight 26.5kg approx.
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