NAVAC Digital Torque Wrench Owner’s Manual

Navac NTW1 Digital Torque Wrench Owner’s Manual

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

1. Head Insert
2. Sensor Yoke
3. LCD Readout
4. Communication Port
5. Up/Down Button
6. Buzzer
7. Power on/Clear Button
8. Unit/Setting Button
9. Pre-setting Number Selection Button
10. Anti-slip Handle
11. Opening Size Adjuster
12. Battery Cover
13. LED Indicator
14. Torque Value Readout
15. Units(N-m,ft-lb,inlb,kg-cm)
16. Pre-setting Number
17. Peak/Track Mode
18. Water Indicator Viewing Window

Specification

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:

*1: The accuracy of the readout is guaranteed from 20% to 100% of maximum range + /- 1 increment. The torque accuracy is a typical value. Calibration point is at the middle line of black circle area on the rubber grip. For keeping the accuracy, calibrate the wrench for a constant period time (1 year).

*2: Horizontal and vertical test.

*3: Environmental test:

a. Dry heatb. Coldc. Damp heatd. Change of temperaturee. Impact (shock)f. Vibrationg. Drop

*4: Electromagnetic compatibility test:

a. Electrostatic discharge immunity (ESD)b. Radiated susceptibilityc. 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 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 RESETTING 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 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 the 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 head of the wrench, the reading on the display will be different for the different length of the head. Please refer to the following explanation.D : The set torqueD1: The actual torque applied to the nut.L1: The normal lengthL2: The extended lengthL3: 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

STEP 1: PRE-SETTING NO.

STEP 2: UNIT SELECTION

STEP 3: SET TORQUE VALUE

STEP 4: PEAK HOLD /TRACK MODE SELECTION

Track Mode Operation

Peak Hold Mode Operation

Peak Hold Mode Recorded Value Review

Maintenance and Storage

ATTENTION:

1. A one-year periodic recalibration is recommended to maintain accuracy.
2. Please contact NAVAC technical support for calibration details.

CAUTION:

1. Over-torque (110% of Max. torque range) could cause breakage or lose accuracy.
2. Do not shake violently or drop wrench.
3. Do not use this wrench as a hammer.
4. Do not leave this wrench in any place exposed to excessive heat, humidity, or direct sunlight.
5. Do not use this wrench in water (not waterproof).
6. If the wrench gets wet, wipe it with a dry towel as soon as possible. The salt in seawater can be especially damaging.
7. Do not use organic solvents, such as alcohol or paint thinner when cleaning the wrench.
8. Keep this wrench away from magnets.
9. Do not expose this wrench to dust or sand as this could cause serious damage.
10. Do not apply excessive force to the LCD panel.
11. Apply torque slowly and grasp the center of the handle. Do not apply load to the end of handle.

Battery Maintenance

1. When the wrench is not going to be used for an extended period of time, remove the battery.
2. Keep a spare battery on hand when going on a long trip or to cold areas.
3. Do not mix battery types or combine used batteries with new ones.
4. Sweat, oil and water can prevent a battery’s terminal from making electrical contact. To avoid this, wipe both terminals before loading a battery.
5. Dispose of batteries in a designated disposal area. Do not throw batteries into a fire.

Rev. NTW1 v1