Klutch 48520 User manual

Digital Display Air Pressure Gauge
Owner’s Manual
WARNING: Read carefully and understand all ASSEMBLY AND OPERATION
INSTRUCTIONS before operating. Failure to follow the safety rules and other basic safety
precautions may result in serious personal injury.
Item #48520

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Thank you very much for choosing a Klutch™product!
For future reference, please complete the owner’s record below:
Serial Number/Lot Date Code: ________________________________
Purchase Date: ____________________________________________
Save the receipt, warranty, and this manual. It is important that you read
the entire manual to become familiar with this product before you begin
using it.
This pressure gauge is designed for certain applications only. Northern
Tool & Equipment is not responsible for issues arising from modification
or improper use of this product such as an application for which it was
not designed. We strongly recommend that this product not be modified
and/or used for any application other than that for which it was designed.
For technical questions, please call 1-800-222-5381.

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Table of Contents
Intended Use..........................................................................................................................................4
Technical Specifications......................................................................................................................4
Important Safety Information...............................................................................................................5
Specific Operation Warnings...............................................................................................................6
Main Parts of Product...........................................................................................................................6
Assembly Instructions..........................................................................................................................7
Operating Instructions..........................................................................................................................8
Maintenance ..........................................................................................................................................8
Troubleshooting....................................................................................................................................9
Parts Diagram......................................................................................................................................10
Parts List..............................................................................................................................................10
Replacement Parts..............................................................................................................................10
Limited Warranty.................................................................................................................................11

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Intended Use
The Klutch Digital Display Air Pressure Gauge is for use with air regulators for setting air output pressure
of filtered air and incombustible and non-corrosive gases. The digital readout displays air pressure in a
choice of four units: PSI, BAR, MpA, and Kg/Cm2. Compared to a mechanical gauge, the digital gauge
offers higher accuracy, higher pressure, better resistance to vibration, and easier reading (back lit). The
unit design is a square body 1-1/4"(30 mm) with a die cast, aluminium centre back and 1/8"male threads.
Technical Specifications
Rated Pressure Range
0 - 145 PSI
Display Pressure Range
-15 to 145 PSI*
Max. Pressure
217.5 PSI
Applicable Fluid
Filtered air and incombustible / non-corrosive gases
Pressure
Resolution
MPa
0.001
Kgf/cm2
0.01
Bar
0.01
PSI
0.1
Battery
CR 2032 lithium
Back Light
Yes
Battery Life
1 Year (5 times / day)
Low-Power Indicator
Yes
Battery Replaceable
Yes
Turn-Off-Interval
Display turn off after 60 sec.
Sampling Rate
2 Hz (2 times / sec.)
Pressure Unit
PSI, Bar, Kgf/cm2, Mpa. User selectable
Repeatability
≤ ±2% F.S. ±1 Digit
LCD Display
3½ digit - 7 segment
Indicator Accuracy
≤±2% F.S.*** ±1 Digit
(ambient temperature: 22 - 28 °C / 72 - 82 °F)
Environment
Enclosure
IP65**
Ambient Temp. Range
Operation: 0 - 50 °C (32-122 °F), Storage: -10 to 60 °C
(14 - 140 °F) (No condensation or freezing)
Ambient Humidity Range
Operation / Storage: 35 ~ 85% RH (No condensation)
Vibration
Total amplitude 1.5mm or 10G, 10Hz - 55Hz -10Hz scan
for 1 minute, two hours each direction of X, Y, and Z
Shock
100m/s2 (10G), 3 times each in direction of X, Y and Z
Temperature Characteristic
≤ ±2% F.S. of detected pressure 25°C (77 °F) at temp.
range of 0 - 50 °C (32 - 122 °F)
Port Size
1/8” NPT
Weight
Approx. 40g / 1.4 oz.
* When the pressure is -15 PSI, LCD displays
** Air tube must be installed to maintain IP65
***F.S. - Full Scale

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Important Safety Information
⚠WARNING
Read and understand all instructions. Failure to follow all instructions may result in serious injury or
property damage.
The warnings, cautions, and instructions in this manual cannot cover all possible conditions or
situations that could occur. Exercise common sense and caution when using this pressure gauge.
Always be aware of the environment and ensure that the tool is used in a safe and responsible
manner.
Do not allow persons to operate or assemble the pressure gauge until they have read this manual
and have developed a thorough understanding of how it works.
Do not modify this pressure gauge in any way. Unauthorized modification may impair the function
and/or safety and could affect the life of the product. There are specific applications for which the
gauge was designed.
Use the right tool for the job. DO NOT attempt to force small equipment to do the work of larger
industrial equipment. There are certain applications for which this equipment was designed. It will be
a safer experience and do the job better at the capacity for which it was intended. DO NOT use this
equipment for a purpose for which it was not intended.
Industrial or commercial applications must follow OSHA requirements.
⚠WARNING
This product may contain chemicals known to the State of California to cause cancer, birth defects or
other reproductive harm.
⚠WARNING
WORK AREA SAFETY
Inspect the work area before each use. Keep work area clean, dry, free of clutter, and well-lit.
Cluttered, wet, or dark work areas can result in injury. Using the product in confined work areas may
put you dangerously close to cutting tools and rotating parts.
Keep children and bystanders away from the work area while operating the pressure gauge. Do not
allow children to handle the pressure gauge.
⚠WARNING
PERSONAL SAFETY
Stay alert, watch what you are doing, and use common sense when operating the pressure gauge.
Do not use the pressure gauge while you are tired or under the influence of drugs, alcohol, or
medication. A moment of inattention while operating the tool may result in serious personal injury.
Dress properly. Do not wear loose clothing, dangling objects, or jewelry. Keep your hair, clothing and
gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts.
Air vents on the tool often cover moving parts and should be avoided.
Wear the proper personal protective equipment when necessary. Use ANSI Z87.1 compliant safety

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goggles (not safety glasses) with side shields, or when needed, a face shield. Use a dust mask in
dusty work conditions. Also use non-skid safety shoes, hardhat, gloves, dust collection systems, and
hearing protection when appropriate. This applies to all persons in the work area.
Do not overreach. Keep proper footing and balance at all times.
⚠CAUTION
GAUGE USE AND CARE
Do not force the pressure gauge. Products are safer and do a better job when used in the manner for
which they are designed. Plan your work, and use the correct product for the job.
Check for damaged parts before each use. Carefully check that the pressure gauge will operate
properly and perform its intended function. Replace damaged or worn parts immediately. Never
operate the gauge with a damaged part.
Store the pressure gauge when it is not in use. Store it in a dry, secure place out of the reach of
children. Inspect the gauge for good working condition prior to storage and before re-use.
Use only accessories that are recommended by the manufacturer for use with your pressure gauge.
Accessories that may be suitable for one product may create a risk of injury when used with another
tool. Never use an accessory that has a lower operating speed or operating pressure than the tool
itself.
Keep guards in place and in working order. Never operate the pressure gauge without the guards in
place.
Specific Operation Warnings
⚠WARNING
Do not use corrosive or flammable gas or liquid with this gauge.
Use within the rated pressure range. Do not apply pressure beyond recommended maximum
pressure, permanent damage to the pressure gauge may occur.
Do not drop, hit or allow excessive shock. Even if gauge body appears undamaged, internal
components may be broken and can cause malfunction.
Do not use the pressure gauge in an environment containing steam or oil vapor.
This pressure gauge is not explosion-proof rated. Do not use in atmosphere containing flammable or
explosive gases.
Using a filter can extend the gauge’s service life.
Main Parts of Product

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Panel Description
Dimensions
Assembly Instructions
1. Unscrew the pressure gauge port bolt on regulator or filter & regulator combination.
2. Replace the bolt with the digital pressure gauge corresponding to the size of the port (1/8").
3. The pressure gauge can be installed on either of the two pressure gauge ports on the regulator.

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Operating Instructions
Power Saver Mode
1. The pressure gauge will enter the power saving mode if the button is not pressed for 60 sec.
2. In the measure mode, press the button to extend the display for 120 sec.
Pressure Unit Setting Mode Zero Point Reset
Maintenance
Dust and Splash Environment
1. To maintain IP65, please insert an air tube (O.D. 4 mm) into the atmospheric release port and pipe
the other end away from a dust and spattering liquid environment.
2. Use a proper air tube dimension of O.D. 4 mm, I.D. 2.5 mm and the length depending on the user’s
environment.

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Battery Replacement
Follow these steps:
1. Using a flat screwdriver (size 1.4 ~ 3.0 mm) insert into the back of the pressure gauge as
pictured. See figure 2.
2. Turn the screwdriver horizontally 90° to separate the case and the base. Repeat the process
again for the other side. See figure 3.
3. Carefully remove the outer cover (figure 4), and follow the diagrams below to replace the battery
and reassembly. Polarity must be observed because incorrect battery installation will cause a
malfunction.
Troubleshooting
Failure
Possible Cause
Corrective Action
Error Type
Error Code
Residual Pressure Error
Err
During zero reset, ambient
pressure is over ±3% F. S.
Change input pressure to
ambient pressure and perform
zero reset again.
Applied Pressure Error
HHH
Supply pressure exceeds the
upper limit of pressure setting.
Adjust the pressure within the
operating pressure range using
the regulator knob.
LLL
Supply pressure exceeds the
lower limit of pressure setting.
Battery Error
bAE
When battery level is under
2.40V, the battery symbol and
bAE will flash 4 times then
enter power save mode.
Replace battery.

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Parts Diagram
Parts List
Reference
Part Number
Quantity
1
Front Protective Lid
1
2
Panel Adapter
2
3
Meter Body
1
Replacement Parts
For replacement parts and technical questions, please call Customer Service at 1-800-222-5381.
Not all product components are available for replacement. The illustrations provided are a convenient
reference to the location and position of parts in the assembly sequence.
When ordering parts, the following information will be required: item description, item model number,
item serial number/item lot date code, and the replacement part reference number.
The distributor reserves the rights to make design changes and improvements to product lines and
manuals without notice.
Meter Body