Du-Pas NPA Series User manual

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INSTRUCTION MANUAL
20V Cordless Transducerized tools
NPA / NRA Series
Save this manual for future reference

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WARNING! “READ ALL INSTRUCTIONS” Always observe the safety regulations applicable in your country
to reduce the risk of fire, electric shock and personal injury. Understand the following safety instructions
before attempting to operate this product. Always wear eye protection when working with power tools.
Keep these instructions in a safe place.
SAVE THESE INSTRUCTIONS
General Safety Rules
Work Area Safety
Personal Safety
⚫Keep your work area clean and well lit.
Cluttered benches and dark areas invite
accidents.
⚫Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases, or dust. Power
tools create sparks which may ignite the
dust or fumes.
⚫Keep bystanders, children, and visitors away
while operating a power tool. Distractions can
cause you to lose control.
⚫Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use tool while tired or
under the influence of drugs, alcohol, or
medication. A moment of inattention while
operating power tools may result in serious
personal injury.
⚫Dress properly. Do not wear loose clothing
or jewelry. Contain long hair. Keep your
hair, clothing, and gloves away from
moving parts. Loose clothes, jewelry, or
long hair can be caught in moving parts.
⚫Do not overreach. Keep proper footing
and balance at all times. Proper footing and
balance enables better control on the tool in
unexpected situations.
⚫Use safety equipment. Always wear eye
protection. Dust mask, non-skid safety
shoes, hard hat, or hearing protection must
be used for appropriate conditions.
Tool Use and Care
⚫Use clamps or other practical ways to secure
and support the work piece to a stable
platform. Holding the work piece by hand or
against your body is unstable and may lead to
loss of control.
⚫Do not force tools. Use the correct tool for
your application. The correct tool will do the
job better and safer at the rate for which it is
designed.
⚫Do not use tool if switch does not work. Any
tool that cannot be controlled with the switch
is dangerous and must be repaired.
⚫Store idle tools out of reach of children and
other untrained persons. Tools are dangerous
in the hands of untrained users.
⚫Check for misalignment or binding of moving
parts, breakage of parts, and any other
condition that may affect the tool operation. If
damaged, have the tool serviced before using.
Many accidents are caused by poorly
maintained tools.
⚫Use only accessories that are recommended
by the manufacture for your model.
Accessories that may be suitable for one tool,
may become hazardous when used on another
tool.

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Additional Safety Rules
for Cordless tools
Battery Charger
⚫Caution: To reduce risk of injury, charge only
the authorized batteries. Other types of
battery may burst, causing personal injury
and damage.
⚫Before using battery charger, read all
instructions and cautionary markings on
batteries, chargers and products using
batteries.
⚫Do not allow anything to cover or clog the
charger vents.
⚫Do not expose charger to rain, snow or wet
conditions.
⚫To reduce the risk of damage to electric plug
and cord, pull by plug rather than cord when
disconnecting charger.
⚫Use of an attachment not recommended or
sold by the manufacturer may result in a risk
of fire, electric shock, or injury to persons.
⚫Make sure cord for charger is located so that
it will not be stepped on, tripped on, tripped
over, or otherwise subjected to damage or
stress.
⚫Do not abuse the power cord. Never use the
cord to carry the charger. Keep cord away
from heat, oil, water, sharp edges, or moving
parts. Replace damaged cords immediately.
⚫Do not operate charger if it has been
damaged in any way, take it to a qualified
service center for repair.
Service
⚫Tool service must be performed only by
qualified repair personnel. Service or
maintenance performed by unqualified
personnel could result in a risk of injury.
⚫When servicing a tool, use only identical
replacement parts. Follow instructions in
the Maintenance section of this manual.
Use of unauthorized parts or failure to
follow maintenance instructions may create
a risk of electric shock or injury.
⚫To reduce risk of electric shock, unplug
charger from outlet before attempting any
maintenance or cleaning. Turning off controls
will not reduce this risk.
⚫Do not disassemble charger or battery
cartridge, take it to a qualified service center
when repair is required. Incorrect reassembly
may result in a risk of electric shock or fire.
Battery Pack
⚫Do not charge battery pack when
temperature is below 0oC (32oF) or above
40oC (104oF).
⚫Do not attempt to use a step-down
transformer, an engine generator or DC
power receptacle.
⚫Do not short the battery pack: Do not touch
the terminals with any conductive material.
Avoid storing battery cartridge in a container
with other metal objects such as nails, coins,
paper clips, etc.
⚫Do not expose battery cartridge to water or
rain. A battery short can cause large current
flow, overheating, possibly burns and even a
break-down.
⚫Do not store the machine and battery pack in
locations where the temperature may reach
or exceed 50°C (122°F).
⚫Do not incinerate the battery pack even if it is
severely damaged or completely worn out.
The battery pack can explode in a fire.
⚫Be careful not to drop, shake, or strike the
battery.
⚫Do not charge inside a box or container of any
kind. The battery must be placed in a well
ventilated are during charging.
⚫Do not dispose of battery packs into
household waste, fire or water. Battery packs
should be collected, recycled or disposed of
in an environmentally-friendly manner. Call
the authorized warranty centers for places to
dispose of damaged or inoperable batteries.

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Purpose of This Document
This document mainly describes the different menu displays and indicates how to edit on those screens.
The following image is the display screens of NPA series tool with the LED indicator light and the function
keys.
Programming Keys:
The functions of the Programming keys are shown on the display screen.
Button
1
Button
Button
Button
Display Screen
Green
Yellow
Red

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1. Overview of the Display Screens
Turn on the NPA/NRA tool
Run Screen
Press Button and Button simultaneously
Enter the setting screen
Press to enter the password
To adjust digital position
To Increase number
To decrease number
To confirm the setting
Press to enter to start programming
Return to the run screen
Enter or confirm
To switch to the last screen or change value
To switch to the next screen or change value
Press or pull the trigger to return to the
Run Screen

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Tightening Mode: Torque or Angle
Tightening Direction
A. Clockwise B. Anti-Clockwise
Torque Low Limit
Target Torque
Target Angle
Shift down Torque
Threshold Torque
Free Speed Setting
Shift down Speed
Torque High Limit
Group Count
Angle High Limit
Angle Low Limit
P-Step sequence setting
P-Step selection

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2. Display Screen Description
2.1 Run Screen
The initial and run screen shows:
1. Primary display (Center): the actual tightening torque, sequence of the P-Step and the unit of torque.
2. Upper secondary display(right): screw number tightened/ group count.
3. Upper secondary display(left): target torque value / targe angle value.
Target Torque/
Target Angle
Screw number tightened/
Group count
Actual tightening
torque
Unit of torque
Sequence of the P-Step
Red light indicates the
tightening is failed
Yellow light indicates
low battery
Green light indicates the
tightening is completed

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2.2 Setting Screen
1. Press and simultaneously to enter the setting screen.
2. Press to return to the run screen;
Press to enter the Password screen.

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2.3 Password Setting
The primary display shows the 4-digit password, and each digit is adjustable from 0 to 9.
1. Press → to move the cursor to the number wish to be adjusted.
2. Press → to increase the number, up to 9.
3. Press → to decrease the number, down to 0.
4. Press → to confirm.
If the password is valid, the display will be unlocked and continue on following settings that can be
adjusted. If the password in invalid, the display will return to the setting screen as 2.2 shown.
Note: To reset the password, the NPT software is required.

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2.4 P-Step sequence setting
There are total 8 P-Steps, the first digital can be adjusted from one (1) to eight (8), the 2nd to the 8th digital
is available from zero (0) to eight (8), “0” indicates not to use this program, if you do not want to use the
program, please set zero (0), once the digital is zero (0), the following digitals will become zero (0)
automatically, which means the following programs will not be used. The steps will repeat from the 1st step
to the last P-step you put in the sequence.
1. Press -> to enter for setting. The screen background turns to white from black.
2. Press → to adjust the number from 0 up to 8.
Note: 1st digital cannot be 0.
3. Press → to move the cursor to the next digital.
4. Press → to confirm and save, and press → the screen background color turns to black from
white.
5. Press → to go to next setting, or press → back to last setting, or press → to return
the run screen.