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Electroding Generator Model 5915

The Tinsley 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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The 5915 Tinsley Electroding Generator is intended as an aid to cable repair ships in locating and identifying telephone cables. The Electroding Generator energises 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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Product Specifications

Output

Continuously adjustable current-regulated DC, sine wave modulated

Current Range


  • Minimum: 75 mA modulated at ±25 mA (50 mA – 100 mA peak-to-peak)

  • Maximum: 275 mA modulated at ±225 mA (50 mA – 500 mA peak-to-peak)

Current Regulation

< 5%

Current Control

Continuously adjustable via 10-turn potentiometer

Mains Switching

Key-operated. The key is removable only in the OFF position

Voltage

500 V peak max

Polarity

Output polarity selected via 3-position key switch (Positive, Off, Negative)

The key is removable in any position

Monitoring

Both current and voltage continuously monitored by individual front panel meters (accuracy: 3% F.S.D)

Modulation Frequency


  • Range: 5 Hz to 99.9 Hz, selectable in 0.1 Hz steps

  • Accuracy: ±0.01 Hz

  • Stability: 0.03% long term (12 hr), 0.003% short term (10 min)

Output Distortion

Total Harmonic Distortion (THD): 5%

Controls

Adjustable via thumbwheel edge switches

Power Requirements


  • Voltage: 105 V to 125 V or 210 V to 250 V, 50 Hz to 60 Hz (selected via rear panel)

  • Power applied by key switch; key removable in OFF position only

  • Mains input fused, via I.E.C. socket

Weight and Dimensions


  • Size: 300 H × 512 D × 470 W (mm) approx.

  • Weight: 26.5 kg approx.

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 energising 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.

Watch our new movie to see the features and benefits of our 5915 Sine Wave Electroding Generator.

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