Digitrex 3-3000-00a-F manual Running off Pitch or Calculating Depth from Pitch

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®

Locating

 

Running off Pitch or Calculating Depth from Pitch

The transmitter’s depth can be estimated by using the pitch information. Use the following procedure to estimate the depth based on the pitch, starting with the first rod.

1.At the point the drill head penetrates the surface of the ground to the middle of the transmitter’s slots (entry point), measure the amount of rod left on the rack (from the make-up/breakout clamps to the top of the rod). This will tell you how much of the first rod with the transmitter will go underground. To calculate the depth after the first rod, use the table below the DigiTrak Receiver handle and choose a pitch reading closest to the entry angle. Multiply the depth number from the table by the ratio of the rod length that went into the ground. For instance, using 10-ft (3-m) rods and measuring 8 ft (2.4 m) left on the rack, the ratio is 8/10 or 0.8. Multiply 0.8 by the depth number from the table. As an example, if the launch angle is 28%, the closest pitch on the label is 30% which corresponds to a depth change of 34 inches (86 cm). Multiply 34 inches (86 cm) by 0.8 to give the calculated depth, which is 27.2 inches (69 cm).

2.For each additional rod, use the table on the receiver to determine how much depth is gained or lost and multiply by the rod length (see table provided in Appendix called “Depth Increase in Inches per 10-foot Rod”).

3.For all negative pitch readings, depth is gained or increased.

4.For all positive pitch readings, depth is lost or decreased.

5.If pitch readings fluctuate over the length of the rod, it will be necessary to average the pitch readings for that rod. For instance if the pitch at the beginning of the rod was 8%, halfway it read 6%, and at the end it was 4%, then the average pitch for that rod will be 6% [(8 + 6 + 4) ÷ 3 readings = 6]. Another example is –2, 0, and 2 as pitch readings at the beginning, halfway, and end (respectively) would average as a 0% pitch over that rod [(–2 + 0 + 2) ÷ 3 readings = 0].

6.Note that these estimates are approximate only and accuracy depends on accurate pitch and other measurements.

Entry Point

Surface of Ground

1 Drill Rod

Pitch Angles

Add to Depth

 

 

 

Subtract

 

 

 

 

(Pitch "–")

from Depth

 

 

 

 

(Pitch "+")

 

 

 

 

 

 

Calculating Depth from Pitch

DigiTrak® Mark III Operator’s Manual

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Contents Mark III Directional Drilling Locating System Trademarks Table of Contents Remote Display System Remote Telemetry License Limited Warranty Safety Precautions Vii RememberViii Dear CustomerBasic DigiTrak Equipment IntroductionDigiTrak Directional Drilling Locating System Basic DigiTrak Operation IntroductionTechnical Support 3000-00b-F DigiTrak Receiver Side View ReceiverDigiTrak Receiver Top View Showing Display Window IconsDisplay Window Icons ReceiverFirmware Version Remote Channel Setting Depth Measurement Units Receiver Battery Voltage LCD TestOn/Off To turn the receiver onClicking vs. Holding the Trigger Receiving the Transmitter’s SignalsTo turn the receiver off To change the channel Changing the Receiver’s Channel SettingReceiver Battery Status Voltage Remaining Battery Status Display for Receiver and TransmitterChanging the Depth Measurement Units English vs. Metric To change the measurement unitsUltrasonic Function Temperature RangeUse of Ultrasonic Measurement To Determine Actual Depth Zeroing the Ultrasonics Calibrating the Receiver Determining 1-Point Calibration SignalDo not calibrate if To calibrate newer receivers Confirming Proper CalibrationReceiver Depth Antenna Plumb Line Using Depth Antenna Plumb Line to Mark Locate PointsSeries Firmware Functions Finding Firmware VersionRunning Time Meter Display Procedure for Observing the Predicted DepthHow a Transmitter Works TransmitterBatteriesAntenna Index Slot Back Front DigiTrak TransmitterBattery Status Display Temperature DisplayTemperature Overheat TransmitterVerifying Proper Fit of Transmitter in Housing Sleep Mode Automatic ShutoffHow Transmitter Should Fit in Housing Front End Cap of Transmitter Showing Temp Dot and Index Slot To install a transmitter in the housingSensitive-Pitch Transmitters Locating the TransmitterTransmitter as an Inclinometer Tips for drilling with a sensitive-pitch transmitterModel Type Length Signal Battery Temp Color Transmitter SpecificationsSerial Numbers Range Type RatingRemote Display Unit Remote Display SystemTransmitter Temperature and Battery Status On/Off and Setting the ChannelRemote Display Using DigiTrak Receiver for Remote Steering Setting up DigiTrak Receiver For Remote SteeringRemote Steering ~ I5 DataLog CapabilityDigiTrak Battery Charger Battery ChargerCharging a Battery Battery ChargerBattery Is Battery Charger Control PanelConditioning a Battery Manually Conditioning a Battery in the ChargerIndicator Lights and Meanings Setup for Discharging a Battery Manually3000-00f-F Shutdown Procedure Start-up ProcedureMoisture and Temperature Avoidance System Operating InstructionsGeneral Maintenance Optimal Operating TemperaturesSystem Operation Electrical Interference/Background Noise Check Signal InterferenceSuggestions for Dealing with Interference Signal InterferenceSelf-Test for Mark III Receivers Operational TestsReceiver Balance Check Receiver Gain Test Operational TestsTransmitter Tests Transmitter Distance Color Transmitter Signal Strength ValuesCurrent Draw Test Transmitter Salt Water Range TestTransmitter Model Average Current mA Transmitter Battery Tests 3000-00i-F Locating Mode Trigger Held Locating ModeLocating Locate Points Fnlp & Rnlp and Locate Line PLLHandling the Receiver LocatingSide View Using Plus/Minus +/- Indicators for Locating Using Plus/Minus Indicators for LocatingLocating the Transmitter from the Drill Finding the Rear Negative Locate Point Rnlp from the DrillPlus Changes To Minus Drill Fine Tuning Rnlp Location Walking Toward LeftFinding the Positive Locate Line PLL from the Drill Finding the Front Negative Locate Point Fnlp from the Drill Fine Tuning Fnlp Walking Toward LeftFinding the Transmitter and Its Depth Method for Confirming Position Locating the Transmitter from the FrontLocating the Transmitter from the Front Method for Confirming PositionOff-Track Locating Locating on the FlyOff-Track Locating Four-Turn Technique Splitting the Front and Rear Negative Locate PointsTo find the Fnlp or the Rnlp Pitch Divider Calculating Depth Based on Distance Between Fnlp & RnlpCalculating Depth from Pitch Running off Pitch or Calculating Depth from PitchAntenna Configuration Transmitter’s Signal ShapeSignal Reception Elliptical Shape of Transmitter Signal FieldPositive Locate Line Above Transmitter Front and Rear Negative Locate PointsOrientation of Field Lines with Respect to Antennas 3000-00j-F DigiTrak Cable Transmitter System Cable Transmitter SystemLabel Indicating Cable-Ready Remote Display Cable TransmitterCable Transmitter Power Supply Connected to Remote Display Power SupplyCable Transmitter Adding Batteries in Series Remote Display with Cable Transmitter CapabilityOperation Viewing the Cable System Battery StatusProblem/Concern Causes/Solutions Section to Consult TroubleshootingTroubleshooting Troubleshooting Troubleshooting Troubleshooting 3000-00l-F Glossary Glossary Remote Display Start-up = Power-up = Boot-upRoll Set the UltrasonicsUltrasonic Transducers Ultrasonic FunctionAppendix Percent Depth Increase 100 AppendixPercent of Grade to Degree Conversions Pitch Transmitters Percent Degree Degree to Percent of Grade Conversions Pitch Transmitters Degrees Percent 10.0 Calculating Depth Based on Distance Between Fnlp and Rnlp 3000-00n-F Remote Telemetry License 3000-00o-F Limited Warranty Warranty Claim Procedures