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SELL TO US | 727-492-6587

How to use Ditch Witch Subsite 750 locator

How to use Ditch Witch Subsite 750 locating system


This page serves as a brief instruction for individuals who have previous experience using equipment similar to the one you have purchased. We strongly recommend that prior to using your equipment, you carefully read the manual that accompanies it. It is essential that you keep the manual with the equipment at all times for future reference. In the event that you require a replacement copy of the manual, please contact your dealer.


The Ditch Witch Subsite 750 Tracker is a powerful and reliable system that performs well with a variety of beacons and can track shallow or deep bores. It can send beacon information to a display mounted on the drilling unit operator’s station. The 750 Tracker can also locate lines and cables. Available modes are 8 kHz active (when used with transmitter) and 60 or 50 Hz passive (for locating power cables). Here are some steps to follow when using the system:

  1. Familiarize yourself with the equipment: Before using the 750 Tracker, it is important to read the manual carefully. The manual provides safety information and operation instructions that will help you use and maintain your Subsite Electronics equipment.

  1. Record serial numbers and date of purchase: Record the serial numbers and date of purchase of your Subsite components in the spaces provided in the manual. This information will be useful if you need to order replacement or repair parts.

  1. Calibrate the system for beacon tracking: Before using the 750 Tracker, it is important to calibrate it properly before beginning a beacon tracking job.

Follow these steps:

  • Install beacon into toolhead and place on ground exactly 10 ft (3 m) away from tracker. Make sure no metal objects including drilling unit and drill pipe are within 20 ft (6 m) of tracker and toolhead.
  • Position tracker parallel to center of toolhead.
  • Turn tracker on and press and hold depth and up arrow keys until calibration mode is entered. Release keys.
  • Verify calibration by moving tracker 15 ft (4.5 m) away from toolhead. Check depth. If reading is not 15 ft (4.5 m), recalibrate tracker.

If four dashes appear in the display, unit has not been calibrated or has been calibrated incorrectly, beacon is too close for depth estimate, or beacon is too far away for depth estimate.

After calibration, tracker can estimate depths from approximately 9 in (0.2 m) to 100 ft (30.5 m) depending on beacon used. Keep the following in mind when calibrating system: 1. Beacon and tracker should not be moved or rotated until calibration is complete. 2. Only depth estimation is affected by calibration. Roll, pitch, left/right deviation, temperature, and battery status are not affected. 3. Large metal objects, rebar, power lines, and any other kinds of interference will adversely affect calibration.

  1. Locate underground utilities: Once you have calibrated your system, you can begin locating underground utilities. Follow these steps:

- Walk slowly over the area where you suspect there are underground utilities.

- Listen for audio signals from the receiver unit.

- Use visual indicators on both units to determine signal strength and direction.

- Mark any utility lines that you locate.