Ditch Witch 250R User manual

250R/T
CMW®
Operator’s
Manual
053- 1189
Issue 1.0

250R/T Operator’s Manual Overview - 1
CMW
Overview
Chapter Contents
Serial Number Location . . . . . . . . . . . . . . . . . . . . . . 2
Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . 3
• Bulleted Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
• Numbered Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
• “Continued” Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Overview - 2 250R/T Operator’s Manual
Serial Number Location
CMW
Serial Number Location
Record serial numbers and date of purchase in spaces provided. Unit serial number is located as shown.
Item
date of purchase:
receiver serial number:
transmitter serial number:
accessory model & serial number:
accessory model & serial number:
accessory model & serial number:
ss1129h.eps

250R/T Operator’s Manual Overview - 3
Intended Use
CMW
Intended Use
The system can be configured to locate pipe and cable or trace non-metallic pipe or conduit.
The 250R receiver is configured to operate in twin peak mode with one active frequency (33 kHz) as well
as radio, 50P or 60P and 50S or 60S.
The 250T transmitter places signals on target lines and is used with 250R units. It is configured to send 33
kHz frequency signals. It places a signal on the line through either direct connection, induction clamping, or
broadcast modes.
The unit is designed for operation in temperatures typically experienced in earth moving and construction
work environments. Use in any other way is considered contrary to the intended use. The 250 system
should be operated only by persons familiar with its particular characteristics and acquainted with the
relevant safety procedures. The system should be serviced only by Ditch Witch repair centers.
About This Manual
This manual contains information for the proper use of this equipment. Cross references such as “See
page 50” will direct you to detailed procedures.
Bulleted Lists
Bulleted lists provide helpful or important information or contain procedures that do not have to be
performed in a specific order.
Numbered Lists
Numbered lists contain illustration callouts or list steps that must be performed in order.
“Continued” Indicators
indicates that a procedure is continued on the next page.

Overview - 4 250R/T Operator’s Manual
CMW

250R/T Operator’sManual Foreword - 5
CMW
Foreword
This manual is an important part of your equipment. It provides safety information and operation
instructions to help you use and maintain your Ditch Witch equipment.
Read this manual before using your equipment. Keep it with the equipment at all times for future reference.
If you sell your equipment, be sure to give this manual to the new owner.
If you need a replacement copy, contact your Ditch Witch. If you need assistance in locating a dealer, visit
our website at www.ditchwitch.com or write to the following address:
The Charles Machine Works, Inc.
Attn: Marketing Department
PO Box 66
Perry, OK 73077-0066
USA
The descriptions and specifications in this manual are subject to change without notice. The Charles
Machine Works, Inc. reserves the right to improve equipment. Some product improvements may have
taken place after this manual was published. For the latest information on Ditch Witch equipment, see your
Ditch Witch dealer.
Thank you for buying and using Ditch Witch equipment.

Foreword - 6 250R/T Operator’s Manual
CMW
250R/T
Operator’s Manual
Issue number 1.0/OM-10/07
Part number 053-1189
Copyright 2007
by The Charles Machine Works, Inc.
, Ditch Witch, CMW, AutoCrowd, Modularmatic, Jet Trac, Roto Witch, Subsite,
Fluid Miser, Perma-Soil, Power Pipe, Super Witch, Super Witch II, Pierce Airrow, The Underground, and
The Underground Authority Worldwide are registered trademarks of The Charles Machine Works, Inc.
Zahn and InterChange are pending trademarks of The Charles Machine Works, Inc.

250R/T Operator’s Manual Contents - 7
CMW
Contents
Overview
machine serial number, information about the type of work this machine is designed
to perform, basic machine components, and how to use this manual
1
Foreword
part number, revision level, and publication date of this manual, and factory contact
information
5
Safety
machine safety alerts and emergency procedures 9
Controls
machine controls and how to use them 13
Locate
procedures for locating active, passive and beacon signals 21
Locating Concepts
basic information for locating active, passive and beacon signals 33
Service
service intervals and instructions for this machine 37
Specifications
machine specifications including weights, measurements and power rating 41
Support
the warranty policy for this machine, and procedures for obtaining warranty
consideration and training
45

Contents - 8 250R/T Operator’s Manual
CMW

250R/T Operator’s Manual Safety - 9
CMW
Safety
Chapter Contents
Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Safety Alert Classifications . . . . . . . . . . . . . . . . . . 10
Safety Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Safety - 10 250R/T Operator’s Manual
Guidelines
CMW
Guidelines
• Read and follow all safety precautions.
• Do not operate equipment unless you have completed proper training and have read and understood
the operator’s manual.
• Before operation, ensure the equipment is in proper working order and is not damaged. Any
transmitter leads should be checked for damage.
Safety Alert Classifications
These classifications and the icons defined on the following pages work together to alert you to situations
which could be harmful to you, jobsite bystanders or your equipment. When you see these words and
icons in the book or on the unit, carefully read and follow all instructions. YOUR SAFETY IS AT STAKE.
Watch for the three safety alert levels: DANGER, WARNING and CAUTION. Learn what each level
means.
indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury.
Watch for two other words: NOTICE and IMPORTANT.
NOTICE can keep you from doing something that might damage the unit or someone's property. It can also
alert you against unsafe practices.
IMPORTANT can help you do a better job or make your job easier in some way.

250R/T Operator’s Manual Safety - 11
Safety Alerts
CMW
Safety Alerts
Electric shock. The connection leads may give off an electric shock when plugged into the
transmitter. Avoid touching the metal ends of clips when the transmitter is switched on.
NOTICE:
• Electric shock or equipment damage can result if transmitter is connected to live electrical conductors.
Observe all company and national safety procedures.
• Turn off transmitter when connecting or moving ground stake.
• Always comply with company and national safety requirements. Use correct equipment and working
methods. Use and maintain proper safety equipment.
Explosion possible. Serious injury or equipment damage could occur.
Follow directions carefully.
NOTICE: Do not use equipment in areas where flammable gases may be present or near to
radio-controlled blasting operations.
Incorrect procedures could result in death, injury, or property damage.
Learn to use equipment correctly.
NOTICE: Some buried utilities do not radiate a detectable signal. Always continue checking
during excavation and ensure compliance with HS(G)47.
IMPORTANT: Ditch Witch receivers and transmitters are calibrated to tolerances under strict
environmental conditions. Under normal daily use, Ditch Witch equipment does not require an annual
calibration. A daily functional check is recommended and any units which have been damaged or do not
appear to perform to original factory specifications should be returned to the manufacturer or authorized
repair center for calibration check or repair.

Safety - 12 250R/T Operator’s Manual
Safety Alerts
CMW

250R/T Operator’s Manual Controls - 13
CMW
Controls
Chapter Contents
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
• Single-Key Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
• Double-Key Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
• Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Controls - 14 250R/T Operator’s Manual
Receiver
CMW
Receiver
Single-Key Controls
1. Mode
2. ON/OFF
3. Up arrow
4. Down arrow
5. DEPTH
Item Description Notes
1. Mode To cycle through operating
frequencies, press. See “Mode” on page 35.

250R/T Operator’s Manual Controls - 15
Receiver
CMW
2. ON/OFF To turn on, press.
To turn off, press again.
3. Up Arrow To increase gain, press.
4. Down Arrow To decrease gain, press.
5. DEPTH To estimate depth of properly
located 33 kHz signal, press.
Item Description Notes

Controls - 16 250R/T Operator’s Manual
Receiver
CMW
Double-Key Controls
Item Description
DEPTH + Down Arrow To turn on backlight, press indicated
keys.

250R/T Operator’s Manual Controls - 17
Receiver
CMW
Display
1. Gain level
2. Signal strength
3. Depth
4. Mode
Item Description Notes
1. Gain Level Graphically indicates gain
level. IMPORTANT: Gain increases to the right.

Controls - 18 250R/T Operator’s Manual
Receiver
CMW
2. Signal Strength Numerically and graphically
indicates the signal strength
level.
3. Depth Displays depth estimate of
properly located line.
4. Mode Indicates mode setting. See “Mode” on page 35.
Item Description Notes

250R/T Operator’s Manual Controls - 19
Transmitter
CMW
Transmitter
1. LEDs
2. On/Off
3. Power level
Item Description Notes
1. LEDs Green LED indicates low
power.
Red LED indicates high
power.
IMPORTANT: If both LEDs are
flashing, change batteries.
2. On/Off To turn on, press.
To turn off, press again.
si1017a-d.eps