NAVAC NTW1 Digital Torque Wrench Owner’s Manual
- May 15, 2024
- NAVAC
Table of Contents
NAVAC NTW1 Digital Torque Wrench
Specifications
- Model No.: NTW1
- Torque Measuring Range: 4.2~85 Nm
- Accuracy: +/- 2%
- Data Memory Size: 50
- Pre-Sets: 9
- Bright LED: 6 LEDs (1 Red + 5 Green)
- Operation Mode: Peak hold/Track
- Unit Selection: Nm, in-lb, ft-lb, kg-cm
- Head Type: Adjustable Jaw
- Battery: AAA x 2
- Operating Temperature: 14-140°F (-10-60°C)
- Storage Temperature: 4-158°F (-20-70°C)
- Humidity: Up to 90% non-condensing
- Drop Test: 3.28 ft (1 m), 10G Pass
- Vibration Test: Pass
Product Usage Instructions
Before Using the Wrench
- Battery Installation:
- Remove the battery cap.
- Insert two AAA batteries matching the -/+ polarities of the battery to the battery compartment.
- Put on the battery cap and fasten it tightly.
- Power On and Resetting the Wrench:
- Press to power on the digital torque wrench.
- Usually press to reset the digital torque wrench before using it.
Setup
Follow the steps outlined in the manual to set up the digital torque wrench
for operation.
Track Mode Operation
Switch the wrench to Track Mode by following the instructions provided in
the manual. Use this mode for specific torque measurement requirements.
Peak Hold Mode Operation
To utilize Peak Hold Mode, select this mode using the appropriate button.
This mode is useful for capturing peak torque values during operation.
Maintenance and storage
Properly maintain and store the digital torque wrench as per the guidelines
in the manual to ensure its longevity and accuracy.
Frequently Asked Questions (FAQ)
-
Q: How often should I calibrate the torque wrench?
A: The manual recommends calibrating the wrench for a constant period (1 year) to maintain accuracy. -
Q: What should I do if the water contact indicator turns red?
A: If the water contact indicator turns red, it indicates possible water damage. Contact customer support for assistance.
Dear Customers,
Thank you for purchasing our digital torque wrench. This manual will help you
to use the many features of your new digital torque wrench. Before operating
the torque wrench, please read this manual completely, and keep it nearby for
future reference.
MAIN FEATURES
- Adjustable Jaw 5-30 mm
- Digital torque value readout
- +/- 2% accuracy
- Clockwise and Counter Clockwise operation
- Peak hold and track mode selectable
- Buzzer and LED indicator for the 9 pre-settable target torques
- Water contact indicator
- Engineering units (N-m, ft-lb, in-lb, kg-cm) selectable
- 50 data memory for recall and joint torque auditing
- Auto Sleep after about 5 minutes without use
NAMES AND FUNCTIONS OF PARTS
- Head Insert
- Sensor Yoke
- LCD Readout
- Communication Port
- Up/Down Button
- Buzzer
- Power on/Clear Button
- Unit/Setting Button
- Pre-setting Number Selection Button
- Anti-slip Handle
- Opening Size Adjuster
- Battery Cover
- LED Indicator
- Torque Value Readout
- Units(N-m,ft-lb,in-lb,kg-cm)
- Pre-setting Number
- Peak/Track Mode
- Water Indicator Viewing Window
SPECIFICATIONS
Model No.| Torque Measuring Range| ****
Jaw Size
| ****
Length
---|---|---|---
NTW1| 4.2~85 N-m| 5- 30mm| 12.8 in 325 mm
*Accuracy 1| CW：±2% CCW：±3%
Data memory size| 50
Pre- Sets| 9
Bright LED**| 6 LEDs
(1 Red+5 Green)
Operation Mode| Peak hold/Track
Unit Selection| N-m, in-lb, ft-lb, kg-cm
Head Type| Adjustable Jaw
Battery| AAA x 2
Operating Temperature| 14℉-140℉ (-10℃-60℃)
Storage Temperature| 4℉-158℉ (-20℃-70℃)
Humidity| Up to 90% non-condensing
Drop Test| 3.28 ft (1 m)
Vibration Test 2| 10G
Environmental test 3| Pass
Electromagnetic *compatibility test 4**| Pass
Note:
- The accuracy of the readout is guaranteed from 20% to 100% of the maximum range + /- 1 increment. The torque accuracy is a typical value. The calibration point is at the middle line of the black circle area on the rubber grip. To keep the accuracy, calibrate the wrench for a constant period (1 year).
- Horizontal and vertical test.
- Environmental test:
- Dry heat
- Cold
- Damp heat
- Change of temperature
- Impact (shock)
- Vibration
- Drop
- Electromagnetic compatibility test:
- Electrostatic discharge immunity (ESD)
- Radiated susceptibility
- Radiated emission
BEFORE USING THE WRENCH
BATTERY INSTALLATION
- Remove the battery cap.
- Insert two AAA batteries matching the -/+ polarities of the battery to the battery compartment.
- Put on the battery cap and fasten it tightly.
ATTENTION:
When opening the battery cover of a wrench, you can see a viewing window
for the water contact indicator. Through this viewing window, you can check if
this wrench is damaged by water penetration if the water contact indicator
turns red.
POWER ON AND RESET THE WRENCH
- Press to power on the digital torque wrench.
- Usually press to reset the digital torque wrench before using it.
ATTENTION:
If an external force is applied to the torque wrench during the power-on/reset
or wake-up period, an initial torque offset will exist in the memory.
ACTIVATION DURING SLEEP MODE
- The wrench will auto-sleep after about 5 minutes without use for power saving. Press to wake up the wrench during sleep mode.
RESETTING THE WRENCH
- If the wrench does not function normally, Press together to reset the wrench.
LOW BATTERY VOLTAGE PROTECTION
- If the battery serial voltage is in low voltage status, the wrench will display a battery symbol and then turn off after a while.
WHEN CHANGING THE TYPE OF HEAD
If you use the different heads of the wrench, the reading on the display will
be different for the different lengths of the head. Please refer to the
following explanation.
- D = D1 * (L3+L1) / (L3+L2)
- D: The set torque
- D1: The actual torque applied to the nut.
- L1: The normal length
- L2: The extended length
- L3: The length from the fitting pin to the calibration point.
Reference dimension for each model:
| Model | L1(mm) | L3(mm) |
|---|---|---|
| NTW1 | 85.9 | 175 |
SETUP
- Power On/Clear
- Unit Selection/Setting
- Pre-setting No.
- Up/Down Button
STEP 1: PRE-SETTING NO.
Note:
- If is displayed, that means this wrench has ever been applied more than 110% of torque of the spec.
- The max number of Pre-Sets is 9.
- The “Pre-setting No.” is cyclic.
STEP 2: UNIT SELECTION
STEP 3: SET TORQUE VALUE
Note:
- The “Unit Selection” is cyclic.
STEP 4: PEAK HOLD /TRACK MODE SELECTION
Note:
- Please skip this procedure and continue to the next step.
TRACK MODE OPERATION
Note:
- If is displayed, that means this wrench has applied more than 110% of the torque of the spec.
- When 80% of the target torque is reached, the green LED will begin to flash and the alarm tone will beep intermittently.
- When the target torque is approached, the alarm will change to a steady tone and the green LED will stop flashing and stay on. The red LED will also illuminate.
PEAK HOLD MODE OPERATION
Note:
- If is displayed, that means this wrench has ever been applied more than 110% of torque of the spec.
- If is displayed, that means the wrench’s memory is full and the next value record can not be written in. Please refer to the “Peak Hold Mode Recorded Value Review” section to clear the memory records.
- When 80% of the target torque is reached, the green LED will begin to flash and the alarm tone will beep intermittently.
- When the target torque is approached, the alarm will change to a steady tone and the green LED will stop flashing and stay on. The red LED will also illuminate.
Peak Hold Mode Recorded Value Review
Note:
- The “Peak Hold” mode recorded value review also can be operated from the “Track” mode operation.
- If you operate in the “Peak Hold” mode, the display will show please skip to the next step.
- If the record is empty, it will show .
- This function is not supported on all models.
- Communication mode is for uploading record data to the PC.
- Communication mode is also for calibration of the torque wrench. Please contact NAVAC technical support for more information.
MAINTENANCE AND STORAGE
ATTENTION:
- A one-year periodic recalibration is recommended to maintain accuracy.
- Please contact NAVAC technical support for calibration details.
CAUTION:
- Over-torque (110% of Max. torque range) could cause breakage or loss of accuracy.
- Do not shake violently or drop a wrench.
- Do not use this wrench as a hammer.
- Do not leave this wrench in any place exposed to excessive heat, humidity, or direct sunlight.
- Do not use this wrench in water (not waterproof).
- If the wrench gets wet, wipe it with a dry towel as soon as possible. The salt in seawater can be especially damaging.
- Do not use organic solvents, such as alcohol or paint thinner when cleaning the wrench.
- Keep this wrench away from magnets.
- Do not expose this wrench to dust or sand as this could cause serious damage.
- Do not apply excessive force to the LCD panel.
- Apply torque slowly and grasp the centre of the handle. Do not apply load to the end of the handle.
BATTERY MAINTENANCE
- When the wrench is not going to be used for an extended period, remove the battery.
- Keep a spare battery on hand when going on a long trip or to cold areas.
- Do not mix battery types or combine used batteries with new ones.
- Sweat, oil and water can prevent a battery’s terminal from making electrical contact. To avoid this, wipe both terminals before loading a battery.
- Dispose of batteries in a designated disposal area. Do not throw batteries into a fire.
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