FOR YOUR PERMANENT FILE
WRENCH MODEL NUMBER:
WRENCH SERIAL NUMBER:
For Warranty Claims, Contact CDI Torque Products
at (626) 965-0668.
LIMITED WARRANTY
The CDI Computorq 3 Electronic Torque Wrench
is backed by a one year warranty. This warranty
covers manufacturer defects and workmanship.
The warranty excludes misuse, abuse and normal
wear and tear. Exclusion is not allowed in some
states and may not apply. This warranty gives
you specific legal rights, and you may have other
rights, which vary from state to state.
OPERATION MANUAL
cOMPUTORq 3
ELEcTRONIc
TORqUE WRENcH
IMPORTANT ENVIRONMENTAL NOTES:
1. This equipment may contain hazardous materials which can be
harmful to the environment.
2. Do not dispose of this equipment as municipal waste. Return it
to the distributor or a designated collection center.
Thank you for caring about our environment!
19220 SAN JOSE AVENUE • CITY OF INDUSTRY, CA 91748 • USA
(626) 965-0668
Find other ne torque products at WWW.CDITORQUE.COM
Form 20-1800-CDI
Made in USA with US and Global Components
6/2010 Rev. N/C
SAFETY MESSAGES
SAFETY MESSAGES
WARNING - Risk of ying particles
Over-torquing can cause breakage. Force
against flex stops on flex head can cause
head breakage. An out of calibration angle
wrench can cause part or tool breakage.
Broken hand tools, sockets or accessories
can cause injury. Excess force can cause crow
foot or flare nut wrench slippage.
READ THIS MANUAL COMPLETELY BEFORE
USING THE CDI COMPUTORQ 3 WRENCH
• To insure accuracy, work must not move in
angle mode.
• For personal safety and to avoid wrench
damage, follow good professional tool and
fastener installation practices.
• Periodic recalibration is necessary to
maintain tool accuracy.
USERS AND BYSTANDERS SHOULD ALWAYS
WEAR EYE PROTECTION
• Be sure all components, including
adapters, extensions, drivers and sockets
are rated to match or exceed the torque
being applied with tool.
• Observe all equipment, system and
manufacturer’s warnings, cautions and
procedures when using this wrench.
• Always use the correct size socket for the
fastener being torqued.
• Do not use damaged sockets, showing
signs of wear or cracks.
• Always replace damaged fasteners before
applying torque.
• Never use extensions, such as a pipe, on
the handle of the wrench.
• Always make sure the ratchet Forward/
Reverse Switch is fully engaged in the
correct position.
• Always verify that the wrench capacity
matches or exceeds each application before
proceeding.
• Always verify the calibration of the wrench
if you know or suspect its capacity has been
exceeded.
• Never force the head of ex head drives
against stops.
• Always pull - do not push - on the wrench
handle and adjust your stance to prevent a
possible fall while applying torque.
WARNING - Electrical Shock Hazard
• Electrical shock can cause injury.
• Plastic handle is not insulated.
• Do not use on live electrical circuits.
MAINTENANcE / SERVIcE
1. IMPORTANT - Service, repair and calibration are
to be performed by CDI Torque Products only.
Calibration by the user is recorded in the wrench
and voids factory certification.
2. The torque wrench’s internal mechanism is
permanently lubricated during assembly. Do not
attempt to lubricate the internal mechanism.
WARNING - To avoid damaging Computorq 3
Wrench
• Never operate wrench when powered OFF.
Always power wrench ON prior to applying
torque.
• Do not press ON/ZERO key while torque is
being applied.
• Never use this wrench to loosen fasteners.
3. To safely clean the torque wrench, wipe with a damp
cloth. NEVER use solvents, thinners, or engine
cleaners of any kind. NEVER immerse the torque
wrench in liquids of any kind.
4. Store torque wrench in protective tube at its lowest
torque setting. Do not force handle below lowest
setting.
INTROdUcTION
The Computorq 3 Electronic Torque Wrench digitally
displays fastener torque specification settings, torque
readings and peak hold measurements.
DISPLAY - The wrench features a custom LCD display,
use keypad to select torque units, readout in ft.lb.,
in.Ib., Nm, and kg.cm. Display also includes a 10
segment bar graph.
SETTING - Determine torque specification for fastener.
Next, use the UP or DOWN arrow keys to scroll to the
desired target torque value. NOTE: The target torque
value is adjustable between 10% and 100% of full
scale. The scrolling display rolls over at both ends for
quick and convenient adjustment of setting.
TRACKING - While torque is applied, the display
switches from preset value to actual applied value
with a 0.20 second update rate.
AUDIBLE TONES AND LED’S - When the applied torque
value equals -10% of the target torque value, a
YELLOW LED illuminates. When the target torque value
is reached, the wrench outputs a 0.50 (1/2) second
audible tone and the GREEN LED illuminates. At +10%
of target torque the RED LED illuminates.
BATTERY - The Computorq 3 uses two (2) standard
replaceable “CR123” lithium cells which provide more
than 80 hours of continuous operation. The current
battery level can be determined by viewing the battery
indicator icon in the upper left corner of the LCD
display. A flashing ‘bAtt” display means the wrench is
no longer accurate and the battery must be replaced
before continuing usage of wrench.
POWER ON - Depress and hold the ON/ZERO key until
display illuminates.
POWER OFF - Depress the ON/ZERO key and hold for
5 seconds.
AUTO POWER OFF - Auto power OFF will occur after
2 minutes of nonusage to conserve battery power.
PEAK HOLD - When torque is released the display
holds and flashes the peak torque reading for 10
seconds or until next torque is applied.
OVERLOAD - If the wrench is used beyond 100% of full
scale the audible tone will pulse rapidly to warn the
operator to stop. At 125% of full scale the display will
lock and read “- - - -”.
ZERO - Wrench will automatically perform self
calibration check and re-zero when powered ON. When
powered ON, the wrench can be re-zeroed at any time
by depressing the ON/ZERO key.
SETUP MEMORY - When powered ON, the wrench
returns to the last unit and torque setting selected.
The yellow LED illuminates when the applied torque value equals -10% of the target
torque value.
The green LED illuminates when the target torque value is reached and the wrench
outputs a 0,50 (1/2) second audible tone.
The red LED illuminates at +10% of target torque, indicating fastener was overtorqued.
Rapid “alarm” buzzer sounds.
OPERATOR INSTRUcTION
BATTERY
INDICATOR
AUDIBLE
ALERT
TORQUE
READING
POWER
ON/ZERO
BAR
GRAPH
UNITS OF
MEASURE
UPDOWN
PRESET
UNIT
SELECTION
CCW
INDICATOR
LIGHT
BAR
REPLACE BATTERY
BATTERY
CONDITION
AUDIBLE
ALERT
TORQUE AND/OR
ANGLE DISPLAY
DECREMENT
KEY
ON/OFF
KEY
BAR
GRAPH
TORQUE
UNITS
INCREMENT
KEY
UNIT
KEY
TORQUE
Square
Drive
Force
Torque Settings/Reading = Force x Distance
Torque Wrench Square Drive Distance = A
100% 30% 5%
REPLACE BATTERY
BATTERY
CONDITION
AUDIBLE
ALERT
TORQUE AND/OR
ANGLE DISPLAY
DECREMENT
KEY
ON/OFF
KEY
BAR
GRAPH
TORQUE
UNITS
INCREMENT
KEY
UNIT
KEY
TORQUE
Square
Drive
Force
Torque Settings/Reading = Force x Distance
Torque Wrench Square Drive Distance = A
Set Torque = Fastener To rque
90˚
90˚
100% 30% 5%
REPLACE BATTERY
BATTERY
CONDITION
AUDIBLE
ALERT
TORQUE AND/OR
ANGLE DISPLAY
DECREMENT
KEY
ON/OFF
KEY
BAR
GRAPH
TORQUE
UNITS
INCREMENT
KEY
UNIT
KEY
TORQUE
Square
Drive
Force
Torque Settings/Reading = Force x Distance
Torque Wrench Square Drive Distance = A
Set Torque = Fastener To rque
Set Torque = x A
Fastener Torque
Torque Wrench Square Drive Distance = A
Fastener
Distance = B
A + B
90˚
90˚
100% 30% 5%
REPLACE BATTERY
BATTERY
CONDITION
AUDIBLE
ALERT
TORQUE AND/OR
ANGLE DISPLAY
DECREMENT
KEY
ON/OFF
KEY
BAR
GRAPH
TORQUE
UNITS
INCREMENT
KEY
UNIT
KEY
TORQUE
Square
Drive
Force
Torque Settings/Reading = Force x Distance
Torque Wrench Square Drive Distance = A
Set Torque = Fastener To rque
Set Torque = x A
Fastener Torque
Torque Wrench Square Drive Distance = A
Fastener
Distance = B
A + B
90˚
90˚
Fastener
Distance = B
Set Torque = x A
Fastener Torque
Torque Wrench Square Drive Distance = A
A + B
100% 30% 5%
REPLACE BATTERY
AUDIBLE
ALERT
TORQUE AND/OR
ANGLE DISPLAY
DECREMENT
KEY
ON/OFF
KEY
TORQUE
Square
Drive
Force
Torque Settings/Reading = Force x Distance
Torque Wrench Square Drive Distance = A
Set Torque = Fastener To rque
Set Torque = x A
Fastener Torque
Torque Wrench Square Drive Distance = A
Fastener
Distance = B
A + B
90˚
90˚
Fastener
Distance = B
Set Torque = x A
Fastener Torque
Torque Wrench Square Drive Distance = A
For Angles Less Than 15 Degrees
Set Torque = Fastener To rque (approximately)
DO NOT EXCEED 15 DEGREES
A + B
15˚
15˚
USE OF AdAPTERS,
ExTENSIONS ANd UNIVERSALS
SET-UP:
1. To power wrench ON, depress the ON/ZERO key -
the wrench will seft-test and display the last unit
and torque setting selected.
2. Select the desired units by depressing the UNITS
key. Each time the UNITS key is depressed, a
different unit of measure is displayed - (ft.lb., in.lb.,
Nm, or kg.cm.)
3. Pre-select desired torque value by depressing and
holding the UP ( ) or DOWN ( ) key. The scrolling
display rolls over at both ends for quick and
convenient adjustment of setting.
4. Tool set-up is complete, wrench is ready for use.
IMPORTANT: Proper hand position when grasping
wrench is necessary to ensure highest wrench
accuracy. Position hand so that it is centered on the
gripped portion of handle. AVOID GRASPING WRENCH
ABOVE OR BELOW GRIPPED PORTION OF HANDLE.
USAGE:
1. Begin torquing fastener using a pulling motion.
2. The display will track the applied torque.
3. Stop application of torque when half-second
audible tone is heard and GREEN LED illuminates,
If RED LED illuminates, preset torque value has
been exceeded.When this occurs the operator must
loosen fastener and repeat torque application.
NOTE: LED will illuminate when 90% of desired
preset value has been achieved.
4. On release the PEAK (highest torque value applied)*
will be displayed, flashing for 10 seconds or until
torque is reapplied.
*The PEAK torque reading will tell you if excess torque has been
applied. This feature can be used to improve you wrenching
technique for best accuracy.
Anytime an adapter, extension or universal is used
with a torque wrench in such a way that the fastener
distance is different that the torque wrench square
drive distance, an adjustment to the set torque is
required to get proper fastener torque.
Fastener torque equals torque wrench square drive
torque. Wrench setting is equal to desired fastener
torque.
Fastener torque equals torque wrench square drive
torque. Wrench settIng is equal to desired fastener
torque.
Fastener torque is greater than torque wrench square
drive torque. Calculated setting will be lower that
desired fastener torque.
Fastener torque is less than torque wrench square drive
torque. Calculated setting will be higher than desired
fastener torque.
When using a
universal or
wobble extension,
do not exceed
more than 15
degrees & offset
from perpendicular
drive. Do not use long extensions with the flex-drive.
SPEcIFIcATIONS
100% 30% 5%
REPLACE BATTERY
BATTERY
CONDITION
AUDIBLE
ALERT
TORQUE AND/OR
ANGLE DISPLAY
DECREMENT
KEY
ON/OFF
KEY
BAR
GRAPH
TORQUE
UNITS
INCREMENT
KEY
UNIT
KEY
BATTERY
CONDITION
BAR
GRAPH
TORQUE
UNITS
INCREMENT
KEY
UNIT
KEY
SPEcIFIcATIONS
DISPLAY - 4-digit LCD, low battery indicator.
SETTING - Displayed with no torque applied.
TRACKING - Real time display with torque applied.
PEAK - Displayed value flashes for 10 seconds at
torque release.
DISPLAY CAPACITY - 8,000 counts CW/CCW torque
from 10% to 125% of full scale.
ACCURACY (72° F)
CW CCW
+/-2% +/-3% of reading, 20% to 100% of full scale
+/-4% +/-6% of reading, 10% to 19% of full scale
DIMENSIONS
PART NUMBER DRIVE LENGTH WEIGHT
2401CI3 1/4” 15 in. 2.0 lbs.
1002CF3 3/8” 17 in. 2.2 lbs.
2503CF3 1/2” 27 in. 3.5 lbs.
SEALED KEY PAD
ON/ZERO - power on - auto self check - zero
UP - (+) increases torque setting
DOWN - (-) decreases torque setting
UNITS - selects ft.lb., in.lb., Nm or kg.cm.
MODEL 2401CI3 1002CF3 2503CF3
Drive 1/4” 3/8” 1/2”
ft.lb. 2.0 - 20.0 5.0 - 100.0 25 - 250
in.lb. 24 - 240 120 - 1200 300 - 3000
Nm 2.71 - 27.10 13.6 - 135.6 33.8 - 338
kg.cm. 27.6 - 276 138 - 1382 345 - 3456
PLEASE NOTE
1. CALIBRATION - Contact CDI Torque Products for
calibration services.
2. EQUIPMENT REQUIRED - Precision test bars and
certified calibration weights or another torque
source, accurate to 1/2% of reading.
3. NOTES
- If the display shows “Err0” at power on, the
wrench is damaged and must be returned to CDI
Torque Products for repair.
- Remove battery when stored for extended periods.
4. BATTERY REPLACEMENT - Replace with two (2)
“CR123” Lithium cells only (available anywhere).
To replace battery, remove cover on underside of
handle (opposite display).
OPERATING TEMPERATURE: 40° to 110° F (5° to 42° C)
STORAGE TEMPERATURE: -1° to 122° F (-20° to 50° C)
HUMIDITY - up to 90% non-condensing
BATTERY - Two (2) “CR123” Lithium cells, over 80 hours
continuous operation.
AUTO SHUT-OFF - Auto power OFF will occur after 2
minutes of non-usage to conserve battery power.
cERTIFIcATION
This torque wrench as calibrated at the factory, is
certified to meet the current ASME specification.
Additionally, all wrenches are calibrated on a torque
standard traceable to the National Institute of
Standards and Technology (N.I.S.T.).
cONVERSION TAbLE
To Convert Multiply
From To By
in. oz. in. lb. 0.06250
in. lb. in. oz. 16
in. lb. ft. lb. 0.08333
in. lb. cmkg 1.15212
USE OF ExTENSIONS
ANd AdAPTERS
When using an extension or adapter (increasing the
effective length of the torque wrench) the output
torque value will change. To calculate the new torque
output of the wrench use the following formula:
TA x L
TW =
TA = Torque exerted @ end of adapter
L = Distance between square drive and hand position
TW = Wrench scale reading
A = Length of adapter or extension
TA TW
A
L + A
L
in. lb. mkg 0.01152
in. lb. Nm 0.11298
in. lb. dNm 1.12984
ft. lb. in. lb. 12
ft. lb. mkg 0.13825
ft. lb. Nm 1.35581
dNm in. lb. 0.88507
dNm Nm 0.1
Nm dNm 10
Nm cmkg 10.1971
Nm mkg 0.10197
Nm in. lb. 8.85074
Nm ft. lb. 0.73756
cmkg in. lb. 0.86796
cmkg Nm 0.09806
mkg in. lb. 86.7961
mkg ft. lb. 7.23301
A number of variables can affect torque accuracy.
These include the length of an adapter or extension,
length of the wrench and variations in hand position
on the wrench will affect the accuracy of the above
calculation.
NOTES
mkg Nm 9.80665
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