Printable Guides

• RD7200 Utility Hookup Quick Card
• Locator Reference Guide Checklist

RD7200 Utility Hookup Quick Card

• Water:
  • Metallic: Direct connect to valve/hydrant
  • Plastic (PVC) w/ tracer wire: Red to tracer wire
  • Black to ground stake
  • No tracer wire: Use sonde
  • Freq: 8 kHz–33 kHz
• Sewer:
  • Non-metallic: Use sonde in cleanout/camera
  • Metallic (rare): Direct connect
  • Freq: 33 kHz or 512 Hz sonde
• Electric:
  • Clamp on insulated live cable
  • Alt: Direct connect to sheath/ground (if safe)
  • Check passive power first
  • Freq: 8–33 kHz
• Gas:
  • Plastic w/ tracer wire: Red to tracer wire
  • Steel main: Direct connect to valve/riser
  • Freq: 512 Hz–8 kHz
• Fiber Optic:
  • Armored: Clamp around sheath
  • With tracer wire: Direct connect
  • Freq: 512 Hz–8 kHz
• Chilled Water:
  • Usually metallic: Direct connect to valve/pipe Clamp if insulated
  • Freq: 8 Hz–8 k
• Reclaimed Water:
  • Plastic w/ tracer wire: Direct connect
  • No tracer wire: Induction
  • Freq: Start low, increase if needed
• Best Practices:
  • Direct connect if possible
  • Ground stake 10–20 ft away, perpendicular
  • Start low frequency
  • Confirm with multiple sweeps & modes

Locator Reference Guide Checklist

Utility Locating Quick Reference Guide

• 1. Arrival & Safety
  • Check in & review site maps
  • Wear PPE (vest, hard hat, gloves, boots, glasses)
  • Walk job site & identify hazards
  • Plan which utilities need locating
• 2. Equipment Setup
  • Inspect & power on RD7200/RD8200
  • Run self-test, check batteries
  • Select correct mode: Active / Passive / Induction
• 3. Hookup Steps
  • Preferred order: Direct Connect → Clamp → Induction
  • Red lead → Utility (metal/tracer wire)
  • Black lead → Ground stake (away from other utilities)
  • Start with low frequency, increase only if needed

4. Utility Locating Colors:

5. Locating & Marking
1. Sweep in both directions
2. Verify signal strength
3. Mark path: Flags at turns/crossings, Paint dashes + arrows
4. Depth check at critical points

• 6. Packing Up
  • Disconnect transmitter & ground
  • Clean & inspect equipment
  • Collect flags/cones/safety gear
  • Record locate (photos/Notes/Comment to Call Center)
  • Report job complete

• Best Practices
  • Always confirm with 2+ modes when possible
  • Avoid hooking near transformers/multiple parallel lines
  • Double-check crossings
  • Keep marks consistent & visible