©2015 Dynojet Research, Inc. All Rights Reserved.
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers.
This manual is copyrighted by Dynojet Research, Inc., hereafter referred to as Dynojet,
and all rights are reserved. This manual, and the software described in it, is furnished
under license and may only be used or copied in accordance with the terms of such license.
This manual is furnished for informational use only, is subject to change without notice,
and should not be construed as a commitment by Dynojet. Dynojet assumes no
responsibility or liability for any error or inaccuracies that may appear in this manual.
Except as permitted by such license, no part of this manual may be reproduced, stored in a
retrieval system, or transmitted, in any form or by any means, electronic, mechanical,
recording, or otherwise, without the prior written permission of Dynojet.
The Dynojet logo is a trademark of Dynojet Research, Inc.
Any trademarks, trade names, service marks, or service names owned or registered by any
other company and used in this guide are the property of their respective companies.
Dynojet Research, Inc., 2191 Mendenhall Drive, North Las Vegas, Nevada 89081, USA.
Printed in USA.
Part Number: 98200070 Version 2 (07/2015)
TABLE OF CONTENTS
Chapter 1
Torque Cell Installation
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Conventions Used In This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Main Dyno Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Connecting and Disconnecting the Power—Above Ground Dyno . . . . . . . . . . . . 1-3
Connecting and Disconnecting the Power—In Ground Dyno . . . . . . . . . . . . . . . . 1-4
Accessing the Dyno . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Accessing the Dyno—Above Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Accessing the Dyno—In Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Load Cell Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Routing the Load Cell Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Routing the Load Cell Cable—Above Ground Dyno . . . . . . . . . . . . . . . . . . . . . . . 1-12
Routing the Load Cell Cable—In Ground Dyno . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Replacing the Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Replacing the Covers—Above Ground Dyno . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Replacing the Cover—In Ground Dyno . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Chapter 2
Load Cell Calibration
Load Cell Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers
i
C HAPTER 1
TORQUE CELL INSTALLATION
The torque cell along with Dynojet Power Core software provides the technician with
the ability to control vehicle RPM or speed at any throttle opening. Through our
exclusive closed-loop software design, the vehicle is automatically held at your predetermined setting. Use the torque cell and Power Core software to measure real-time
torque, and perform sweep, step and custom load simulation tests.
This document provides instructions for installing the torque cell on a Dynojet 
Model 250i/250iP DynoWare RT Motorcycle Dynamometer (dyno) and calibrating
the torque cell using Power Core software. To ensure safety and accuracy in the
procedures, perform the procedures as they are described.
Document Part Number: 98200070
Version 2
Last Updated: 07-01-2015
This chapter is divided into the following categories:
• Introduction, page 1-2
• Main Dyno Power, page 1-3
• Accessing the Dyno, page 1-5
• Load Cell Installation, page 1-9
• Routing the Load Cell Cable, page 1-12
• Replacing the Covers, page 1-14
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-1
CHAPTER 1
Introduction
INTRODUCTION
The torque cell, when added to Dynojet's market leading inertia dynamometer, results
in a complete vehicle performance test. Before installing and calibrating your torque
module, please take a moment to read this guide for installation instructions, features,
and other important information.
CONVENTIONS USED IN THIS MANUAL
The conventions used in this manual are designed to protect both the user and the
equipment.
example of convention
description
The Caution icon indicates a potential hazard to the
dynamometer equipment. Follow all procedures
exactly as they are described and use care when
performing all procedures.
The Warning icon indicates potential harm to the
person performing a procedure and/or the
dynamometer equipment.
Bold
Highlights items you can select on in the software
interface, including buttons and menus.
TECHNICAL SUPPORT
For assistance, please contact Dynojet Technical Support at 1-800-992-3525, or write
to Dynojet at 2191 Mendenhall Drive, North Las Vegas, NV 89081.
Visit us on the World Wide Web at www.dynojet.com where Dynojet provides state of
the art technical support, on-line shopping, and press releases about our latest
product lines.
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-2
TO R Q U E C E L L I N S T A L L AT I O N
Main Dyno Power
MAIN DYNO POWER
This section describes how to connect and disconnect the power to both the above
ground and in ground dyno.
CONNECTING
AND
DISCONNECTING
THE
POWER—ABOVE GROUND DYNO
Use the following steps to connect and disconnect power to the above ground dyno.
Always turn the power off when connecting and disconnecting cables.
1
Use the main breaker to turn power on and off to the dyno.
The main breaker is located inside the CPI door. When the handle is in the down
position all power into the dyno is turned off.
2
Disconnect the power plug to ensure all power has been removed from the dyno
before performing certain installation procedures.
Components attached to and within the dynamometer operate with
potentially lethal voltages. The power cord must be disconnected from the
power source before servicing electrical components or wiring.
MC153
power plug
main breaker
Figure 1-1: Main Dyno Power—Above Ground Dyno
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-3
CHAPTER 1
Main Dyno Power
CONNECTING
AND
DISCONNECTING
THE
POWER—IN GROUND DYNO
Use the following steps to connect and disconnect power to the in ground dyno.
Always turn the power off when connecting and disconnecting cables.
1
Use the main breaker to turn power on and off to the dyno.
The main breaker is located inside the CPI door. When the handle is in the down
position all power into the dyno is turned off.
2
Disconnect the power plug to ensure all power has been removed from the dyno
before installing the DynoWare RT electronics.
Components attached to and within the dynamometer operate with
potentially lethal voltages. The power cord must be disconnected from the
power source before servicing electrical components or wiring.
PD231
power plug
main breaker
Figure 1-2: Main Dyno Power—In Ground Dyno
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-4
TO R Q U E C E L L I N S T A L L AT I O N
Accessing the Dyno
ACCESSING THE DYNO
Installing the load cell requires access to the dyno and eddy current brake. This
section will walk you through accessing both the above ground and in ground dyno.
Make sure you have disconnected the power to the dyno before removing the covers.
Refer to “Main Dyno Power” on page 1-3.
ACCESSING
THE
DYNO—ABOVE GROUND
You will need to remove the tire carriage, center panel, and eddy current brake top
cover in order to route the load cell cable to the eddy current brake driver.
1
2
3
Remove the four screws securing the bearing bracket to the tire carriage and set
aside.
Using the hand wheel, or the power carriage, unscrew the bearing bracket and the
carriage screw and set aside.
Remove the tire carriage by sliding the carriage under the carriage clamps toward
the back of the dyno and set aside.
tire carriage
carriage clamp
nut block
carriage screw
TC080
bearing
bracket
screws
hand wheel
Figure 1-3: Remove the Tire Carriage
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-5
CHAPTER 1
Accessing the Dyno
4
5
6
7
8
9
Remove the two 5/16-inch bolts and washers securing each of the carriage clamps
and shims and set aside.
Remove the three carriage clamps and shims and set aside.
Remove the two 5/16-inch bolts and washers securing the nut block and shim and
set aside.
Remove the nut block and shim and set aside.
Remove the six 1/4-20 x 5/8-inch pan head screws securing the center panel to
the dyno carriage and set aside.
Remove the center panel and set aside.
carriage clamp
screw
shim
bolt
washer
nut block
TC081
shim
center panel
Figure 1-4: Remove the Center Panel
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-6
TO R Q U E C E L L I N S T A L L AT I O N
Accessing the Dyno
10 Remove the six screws securing the eddy current brake top cover and set aside.
11 Remove the brake top cover and set aside.
brake top cover
Figure 1-5: Remove the Brake Top Cover
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-7
CHAPTER 1
Accessing the Dyno
ACCESSING
THE
DYNO—IN GROUND
You will need to remove the eddy current brake pit cover in order to route the load cell
cable to the eddy current brake driver.
1
2
Remove the four 3/8-16 x 1/8-inch button-head flange screws securing the eddy
current brake pit cover and set aside.
Remove the eddy current brake pit cover and set aside.
brake cover
PD245
Figure 1-6: Remove the Brake Pit Cover
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-8
TO R Q U E C E L L I N S T A L L AT I O N
Load Cell Installation
LOAD CELL INSTALLATION
This section describes how to remove the existing bar on the eddy current brake and
install the load cell. Use the following instructions for both the above ground and in
ground dynos.
You will need the following part:
part
description
load cell and cable, above ground
P/N 76950573
load cell and cable, in ground
P/N 76950759
1
2
Verify the main dyno power is disconnected. Refer to“Main Dyno Power” on page
1-3 for more information.
Remove the two bolts and nuts securing the existing bar on the eddy current brake
and remove the bar. Set the bolts and nuts aside.
bar
Figure 1-7: Remove the Existing Bar
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-9
CHAPTER 1
Load Cell Installation
3
Verify the eyelets on the load cell are spaced the same as the bar removed earlier.
Adjust the load cell spacing by loosening the lock nut and turning the eyelet.
eyelet
bar
lock nut
distance must be
the same
Figure 1-8: Verify Load Cell Spacing
4
Secure the load cell to the mounting bracket using the two bolts and nuts removed
earlier.
load cell cable
Figure 1-9: Install the Load Cell—Above Ground Dyno
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-10
load cell
TO R Q U E C E L L I N S T A L L AT I O N
Load Cell Installation
install the load cell
(the brake is not
shown for clarity)
PD229
Figure 1-10: Install the Load Cell—In Ground Dyno
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-11
CHAPTER 1
Routing the Load Cell Cable
ROUTING THE LOAD CELL CABLE
Use the following instructions to identify and route the load cell cable.
cable
76950573 load cell and cable—above ground dyno
brief routing description
connects the load cell to the eddy current brake driver
76950759 load cell and cable—in ground dyno
ROUTING
1
THE
LOAD CELL CABLE—ABOVE GROUND DYNO
Route the load cell cable from the eddy current brake through the air hole in the
drum bulkhead and over to eddy current brake driver.
Make sure the load cell cable is clear of any power cables or hot or rotating objects.
2
3
Attach the load cell cable to the eddy current brake driver .
Secure the load cell cable with a zip tie to the underside of the carriage assembly
bulkhead.
DynoWare RT
air hole in drum
bulkhead
eddy current brake driver
load cell cable
load cell
MC158
Figure 1-11: Routing the Load Cell Cable—Above Ground Dyno
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-12
TO R Q U E C E L L I N S T A L L AT I O N
Routing the Load Cell Cable
ROUTING
THE
1
2
LOAD CELL CABLE—IN GROUND DYNO
Open the front panel of the CPI to access the eddy current brake driver.
Route the load cell cable from the eddy current brake, through the designated
communications pit conduit, and attach to the eddy current brake driver inside
the CPI.
Note: Be sure to keep the power and communications cables in different pit
conduits.
DynoWare RT
main module
load cell cable
route
communications
cables in designated
conduit
eddy current
brake driver
load cell
control panel
interface (CPI)
air fuel ratio
module (AFR)
PD246
Figure 1-12: Routing the Load Cell Cable—In Ground Dyno
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-13
CHAPTER 1
Replacing the Covers
REPLACING THE COVERS
Before replacing the covers, verify the load cell is installed and the load cell cable is
routed to the eddy current brake driver.
Before replacing the eddy current brake top cover, be sure to calibrate your load cell.
Refer to “Load Cell Calibration” on page 2-2.
REPLACING
1
2
3
THE
COVERS—ABOVE GROUND DYNO
Secure the center panel to the dyno carriage using the six 1/4-20 x 5/8-inch pan
head screws removed earlier.
Secure the nut block and shim using the two 5/16-inch bolts and washers removed
earlier.
Secure each carriage clamps and shim using two 5/16-inch bolts and washers
removed earlier,
carriage clamp
screw
shim
bolt
washer
nut block
TC081
shim
center panel
Figure 1-13: Replace the Center Panel
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-14
TO R Q U E C E L L I N S T A L L AT I O N
Replacing the Covers
4
5
6
7
Starting from the back of the dyno, slide the carriage under the carriage clamps.
Slide the carriage screw, bearing bracket, and the hand wheel toward the nut block
until the carriage screw is touching the nut block.
Using the hand wheel, or the power carriage, screw the carriage through the nut
block and into the screw support bracket.
Secure the bearing bracket to the carriage using four screws removed earlier.
tire carriage
carriage clamp
nut block
carriage screw
TC080
bearing
bracket
screws
hand wheel
Figure 1-14: Replace the Tire Carriage
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-15
CHAPTER 1
Replacing the Covers
8
Secure the eddy current brake top cover using the six bolts removed earlier.
Note: Before replacing the eddy current brake top cover, be sure to calibrate your
load cell. Refer to “Load Cell Calibration” on page 2-2.
eddy current
brake cover
EB242
Figure 1-15: Replace the Eddy Current Brake Top Cover
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-16
TO R Q U E C E L L I N S T A L L AT I O N
Replacing the Covers
REPLACING
THE
COVER—IN GROUND DYNO
Before replacing the eddy current brake pit cover, be sure to calibrate your load cell.
Refer to “Load Cell Calibration” on page 2-2.
Secure the eddy current brake pit cover using the four screws removed earlier.
brake cover
PD245
Figure 1-16: Replace the Brake Pit Cover
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynammometers
1-17
C HAPTER 2
LOAD CELL CALIBRATION
This chapter will walk you through calibrating the load cell on both the above ground
and in ground dynos. To ensure safety and accuracy in the procedures, perform the
procedures as they are described.
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers
2-1
CHAPTER 2
Load Cell Calibration
LOAD CELL CALIBRATION
This section provides instructions for calibrating the load cell. Follow the directions on
the screen exactly. Failure to perform the directions accurately will result in improper
torque values.
You will need the following parts:
part
description
weight, 25 pounds (4)
P/N 35430899
part
1
2
3
4
Verify the dyno is connected to power. Refer to “Main Dyno Power” on page 1-3.
Double-click the Power Core program icon.
Click Dyno Control from the Application Launcher.
Verify you are connected to the DynoWare RT main module.
Note: For more information on connecting to the dyno electronics, refer to the
Power Core Quick Start Guide (on your Power Core CD or at www.dynojet.com) or
the Power Core Online Help.
5
6
7
From the Configuration ribbon, click Load Cell Calibration
.
Remove the calibration arm and mass if it is installed.
Release the dyno brake. Make sure the drums are free to rotate.
Note: There should not be anything resting on the eddy current brake or the dyno
drum during this procedure.
8
Click Next to zero the connected torque cell.
Figure 2-1: Zero Calibration Window
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers
2-2
description
calibration arm assembly
P/N 61319001
L O A D C E L L C A L I B R AT I O N
Load Cell Calibration
9
Using the drop-down arrow, set the index to zero.
Note: Powersports Dynos have one load cell, leave the index set to zero.
10 Enter the calibration weight. This value is stamped into the calibration arm.
Figure 2-2: Calibration Mass Window
Enter the calibration number stamped near the bolt pattern at the end of the
calibration arm in the Mass box. If you do not have enough room to use the bolt
pattern closest to the end of the calibration arm, use the number stamped near the
bolt pattern in the center of the arm.
Note: Dynojet recommends you secure the calibration arm using the bolt pattern
closest to the end of the arm unless space constraints in your dyno room do not
allow you to.
bolt pattern closest to
the end of the
calibration arm
bolt pattern near the
center of the
calibration arm
Figure 2-3: Calibration Arm Number
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers
2-3
CHAPTER 2
Load Cell Calibration
11 Install the calibration arm and weights using the bolts at the end of the calibration
arm.
Note: If you do not have enough room to use the bolt pattern closest to the end of
the calibration arm, use the bolt pattern in the center of the arm. Refer to Figure
2-6 for above ground dynos and Figure 2-7 for in ground dynos.
11a
Secure the calibration arm to the eddy current brake by tightening the bolt
using the handle.
11b Gently place the weights on the calibration arm.
Note: Verify the calibration arm is not contacting the cover.
The calibration weights are very heavy. The weights must be set on the
arm gently or you could damage the load cell.
weights
weight support pin
secure arm to brake by
tightening handle
TM074
Figure 2-4: Install the Calibration Arm and Weights Using the Bolt Pattern Closest to the End—Above Ground Dyno
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers
2-4
L O A D C E L L C A L I B R AT I O N
Load Cell Calibration
secure arm to brake by
tightening handle
weight support pin
TM076
weights
Figure 2-5: Install the Calibration Arm and Weights Using the Bolt Pattern Closest to the End—In Ground Dyno
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers
2-5
CHAPTER 2
Load Cell Calibration
If you do not have enough room to use the bolt pattern closest to the end of the
calibration arm, use the bolt pattern in the center of the arm as shown in 
Figure 2-6 for above ground dynos and for Figure 2-7 in ground dynos.
weight support pin
weights
secure arm to brake by
tightening handle
TM075
Figure 2-6: Install the Calibration Arm and Weights Using the Bolt Pattern in the Center—Above Ground Dyno
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers
2-6
L O A D C E L L C A L I B R AT I O N
Load Cell Calibration
secure arm to brake by
tightening handle
weight support pin
weights
TM077
Figure 2-7: Install the Calibration Arm and Weights Using the Bolt Pattern in the Center—In Ground Dyno
Version 2
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers
2-7
CHAPTER 2
Load Cell Calibration
12 With the calibration arm and weights secured, click Next to calibrate.
13 Remove the calibration arm and weights and click Finish.
Figure 2-8: Finish Calibration Window
14 Confirm the calibration was successful.
For more information refer to the Power Core Online Help.
Torque Cell Installation Guide for Model 250i/250iP DynoWare RT Dynamometers
2-8