Clarke PRO236, PRO237 Operating & Maintenance Instructions

OPERATING & MAINTENANCE

INSTRUCTIONS

GC12/16

DIGITAL TORQUE WRENCH

Model Nos: PRO236 & PRO237

PART NOs: 1700636 & 1700637

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Parts & Service: 020 8988 7400/E-mail:[e-mail] or [e-mail]

INTRODUCTION

Thank you for purchasing this CLARKE Torque Wrench.

This CLARKE product has been designed to give long and trouble free
service. If however, having followed the instructions in this booklet carefully,
you encounter problems, take the unit to your local CLARKE dealer.

GUARANTEE

This product is guaranteed against faulty manufacture for a period of 12
months from the date of purchase. Please keep your receipt which will be
required as proof of purchase.

This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for it’s intended purpose.

Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission.

This guarantee does not effect your statutory rights.

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Parts & Service: 020 8988 7400/E-mail:[e-mail] or [e-mail]

TABLE OF CONTENTS

INTRODUCTION ..................................................................................2

Guarantee ............................................................................... 2

GENERAL SAFETY PRECAUTIONS ....................................................... 4

Environmental protection .......................................................4

OVERVIEW .......................................................................................... 5

Technical Specifications.........................................................5

THE CONTROL PANEL .........................................................................6

The Display...............................................................................6

The Push-buttons .....................................................................6

PREPARATION FOR USE .......................................................................7

Installing the Batteries ............................................................. 7

Turning the Wrench On/Off.....................................................7

Turning the Display Illumination On/Off ................................7

Auto Power-off Setting ............................................................ 7

Selecting ‘Peak’ or ‘Track’ Mode ........................................... 8

Selecting Units of Measurment ..............................................8

Target Torque Setting ..............................................................8

OPERATION ......................................................................................... 10

Care of the Torque Wrench During Use .................................10

Storage ..................................................................................... 11

Cleaning .................................................................................. 11

Maintenance & Calibration ................................................... 11

Battery Use & Care ..................................................................11

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Parts & Service: 020 8988 7400/E-mail:[e-mail] or [e-mail]

GENERAL SAFETY PRECAUTIONS

1. Never exceed the permitted maximum torque value for this wrench as
given in the Technical Specification. Overloading the wrench could cause
damage.

2. Ensure that associated adaptors, extensions and sockets are rated to
equal or greater than the torque being applied.

3. Always use the correct size and type of socket for the nut/bolt.

4. Never use sockets showing wear or cracks

5. Always pull the wrench towards you. Never push it away and adjust your
stance to prevent a fall should something give way unexpectedly.

6. Never operate the torque wrench or remove the batteries with wet hands.

ENVIRONMENTAL PROTECTION

Do not dispose of metal products with general household waste. All
tools, accessories and packaging should be sorted, taken to a recy­cling centre and disposed of appropriately according to the laws
governing Waste Electrical and Electronic Equipment at a recognised
disposal facility.

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Parts & Service: 020 8988 7400/E-mail:[e-mail] or [e-mail]

OVERVIEW

This torque wrench is designed to tighten nuts & bolts with precision, and with
careful and considerate use, the wrench will give years of reliable service.
Features of the wrench include:

• Audible/light alarm (when pre-set target torque is approaching)

• LED screen with back light (blue)

• Peak Value Hold

• Auto Power-Off

• Low Battery Indication

• Target Torque Value Preset

• Moulded Storage Case

TECHNICAL SPECIFICATIONS

PRO236 PRO237

Drive Shank Size 3/8” 1/2”

Torque Range 10-135 Nm 20-200 Nm

Selectable Torque Unit Nm, lb-in, lb-ft & kg-m Nm, lb-in, lb-ft & kg-m

Function in both Directions Yes Yes

Accuracy +/- 4% +/- 4%

Overall Length 490 mm 608 mm

Weight 1.3 kg 1.5 kg

Batteries Required 4 x AAA batteries 4 x AAA batteries

Battery Life 60 Hr 60 Hr

Operating Temperature 0-40

o

C 0-40oC

Please note that the details and specifications contained herein, are correct at the
time of going to print. However, CLARKE International reserve the right to change
specifications at any time without prior notice.

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Parts & Service: 020 8988 7400/E-mail:[e-mail] or [e-mail]

THE CONTROL PANEL

THE DISPLAY

A ‘Real time’ torque value display

B The units of ‘Angle’(always 0)

C Unit of measurement

D Target Torque Indicator

E Memory Storage numbers

F Battery Condition Indicator

G Peak/Track mode Indicator

H Minus symbol for anti-clockwise operation

THE PUSHBUTTONS

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1. Power ON/OFF button

2. Button to select Memory storage /unit selection.

3. Button to access & accept the Auto On/Off, Measurement units and
Track or Peak mode selection including pre-set torque values.

4. Button to zero the selected values.

5. Button to illuminate the display / select the next digit.

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Parts & Service: 020 8988 7400/E-mail:[e-mail] or [e-mail]

PREPARATION FOR USE

INSTALLING THE BATTERIES

1. Open the cover of the battery
compartment by turning it anti­clockwise & insert four AAA batteries
as shown. Close the compartment
cover and the wrench is ready to use.

TURNING THE WRENCH ON /OFF

1. Press the button to turn on.

• The unit will bleep and the complete
display screen will momentarily light up.

2. Press the button again to turn the system off.

TURNING THE DISPLAY ILLUMINATION ON/OFF

1. The display illumination can be turned on or off by pressing the
button.

AUTO POWER-OFF SETTING

When enabled, this setting means that the wrench will turn off automatically if
no buttons are pressed during a given time. Change the

Auto/Off setting as

follows:

1. Once the unit is powered up, press three times and the default

Auto/Off time of

5 (5 minutes) is shown on the display.

2. Press the button to select the shut-off time of 5 or 15 minutes, or OFF
to turn off the Auto-Off function.

3. Press the button to confirm the selection. The wrench will return to
the measurement mode.

Note; If no buttons are touched for 3 seconds the wrench will return to

the measurement mode.

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Parts & Service: 020 8988 7400/E-mail:[e-mail] or [e-mail]

SELECTING THE PEAK OR TRACK MODE

1. After turning on the display, the system defaults to “Track” mode, i.e. the
real-time torque during use will be displayed.

2. Enter the mode selection by pressing the button once.

3. Press the button to select T (track) mode or P (Peak) mode.

4. Press the button three times to confirm the selection and return to
the measurement mode.

Note; If no buttons are pressed for 3 seconds the wrench will remain at

the last selection of ‘Peak’ or ‘Track’ mode and return to
Measurement mode.

When in ‘Peak’ mode, the maximum torque value measured will be saved
and be shown on the display untill the next task is performed. You can then
proceed to the next action or press to zero the wrench.

SELECTING UNITS OF MEASUREMENT

1. Press the button twice to select “UNIT SELECTION”.

2. Press the button repeatedly to select either N.m / lbf.ft / lbf.in / kgf.m.

3. Press the button twice to confirm the unit selection.

Note; If no buttons are pressed for 3 seconds the wrench will remain at

the last unit of measurement selected, and return to
‘Measurement’ mode.

TARGET TORQUE SETTING

The wrench offers 5 pre-set alarm values (M1to M5) for the target torque.
These values must always be at least 10% of the maximum capability of the
wrench.

The wrench will be delivered with all 5 values pre-set to the maximum
permitted (100%). Note that setting these alarm values will not prevent the
wrench from measuring to its maximum capability.

If using the wrench with no pre-set alarms in use, one pre-set value must
always remain set to 100% of the wrench maximum operating torque. The
target torques are alarm values and the unit will always measure throughout
its operating range.

When the pre-set alarm values have been set, the wrench will always default
to the last value used as indicated by the setting number (M1 to M5).

To set the pre-set alarm values proceed as follows.

1. Press the button to turn the wrench on.

2. Press the button repeatedly to select the pre-set location (M1 to M5)

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3. To set the torque value, press and hold the button for 2 secs.

When the desired value is reached, press the button to move to the
next digit. Repeat this for all digits.

• is shown on the screen and the last saved value is displayed with
the first digit flashing.

4. Press the button to zero the digit or repeatedly press the button,
to increase the value of the flashing digit.

5. When the required torque is set, press to save the pre-set value at
the current memory location.

Note: “

ERRO” will be shown if the pre-set torque is less than the mini-

mum value of 10% capacity or exceeds the 100% maximum
capacity. After 3 seconds, the wrench returns to the target torque
value setting.

Note: After pressing the button to access the torque SELECT

mode, if no selection is made with 3 seconds the wrench will
return to the measurement mode.

SEt

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OPERATION

CAUTION: NEVER USE THE TORQUE WRENCH WHEN THERE IS A LOW
BATTERY CONDITION AS THE TORQUE WRENCH ACCURACY WILL BE
AFFECTED.

CAUTION: NEVER EXCEED THE PERMITTED MAXIMUM TORQUE VALUE
FOR THIS WRENCH. OVERLOADING THE WRENCH COULD CAUSE
DAMAGE.

1. Select the socket required and attach it to the square drive. If possible,
avoid the use of flexible extensions or universal joints which could possibly
result in inaccurate torque readings.

2. Engage the nut or bolt and apply a steady pull with the wrench.

• As the torque reaches half the target value, the LED will show a
yellow light, as the target torque is reached, the LED will illuminate in
green and the alarm will bleep. When the target is exceeded by
approximately 2% the LED will show a red light accompanied by a
continuous alarm tone.

• If in the PEAK mode, the measured torque will be displayed and the
highest value measured will remain as a flashing display until the
wrench is re-set for the next measurement by pressing the button,
or the wrench reaches the time limit to automatically power-off.

• If in the TRACK mode, the actual torque applied at any moment will
be displayed.

3. When the continuous tone is heard, you have reached/exceeded your
target torque, so stop pulling immediately.

Note: if the wrench is operated to its maximum range, the coloured LED

will indicate green at 98% of the range, yellow at 100% and then
change to red with a continuous tone and

‘ERRO ‘ displayed

above this point.

CARE OF THE TORQUE WRENCH DURING USE

1. For assured accuracy of the wrench, periodic self re-setting is necessary as
described under MAINTENANCE & CALIBRATION.

2. Check that the wrench capacity is adequate for the anticipated load
before proceeding and do not exceed the maximum torque setting for
the wrench as stated in the Technical Specification.

3. Re-set the wrench as described under MAINTENANCE & CALIBRATION, if
you believe its capacity may have been exceeded.

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4. Never apply force with the torque wrench when the power is off. Always
turn the unit on before using it.

5. Take care not to damage the LCD display.

6. Take care not to drop the wrench and re-set it as described under
MAINTENANCE & CALIBRATION, should it be subject to sudden shock.

7. Never press the button to turn the wrench off while force is applied.

8. Never use the wrench to undo bolts & nuts which may be excessively
tight. Very tight nuts and bolts should be loosened with a standard wrench
and the torque wrench used only for re-tightening.

9. Do not expose the wrench to extreme temperature, humidity or direct
sunlight for extended periods.

STORAGE

• If the wrench is not to be used for long periods of time it is advisable
to remove the batteries to avoid the risk of leaking.

• Store in a clean, dry environment away from excess heat, humidity
or dust.

CLEANING

1. Clean the wrench by wiping the tool and the display with a soft cloth.
Never immerse it in water or any type of solvent or cleaning fluid.

MAINTENANCE & CALIBRATION

1. Never attempt to dismantle the wrench.

2. To maintain the accuracy of the wrench periodically re-set to zero by
holding the and buttons together.

• The wrench has been calibrated at the factory in order to ensure
accurate readings and should not require any re-calibration. The
original calibration certificate should be supplied with the unit.

3. If inaccuracy is suspected, contact your local Clarke dealer.

BATTERY USE AND CARE

1. If when switching on, there is no reading on the display, or the ‘Battery
Condition Indicator’ on the panel is empty, the batteries must be
replaced.

2. Never combine used batteries with old ones or mix battery types.

3. Never use a battery if it is cracked or damaged.

4. Always dispose of old batteries appropriately. Never either dump or
incinerate old batteries.