PCE-DFG N TW Series Torque Meter User Manual

1 Safety Notes

Please read this manual carefully and completely before using the device for the first time. The device may only be used by qualified personnel and repaired by PCE Instruments personnel. Damage or injuries caused by non-observance of the manual are excluded from liability and warranty.

• The device must only be used as described in this manual. Improper use can cause dangerous situations and damage to the meter.
• Use the instrument only within the specified environmental conditions (temperature, relative humidity). Avoid extreme temperatures, direct sunlight, extreme humidity, or moisture.
• The device case should only be opened by qualified PCE Instruments personnel.
• Never use the instrument with wet hands.
• Do not make any technical changes to the device.
• Clean the appliance only with a damp cloth. Use only pH-neutral cleaner, no abrasives or solvents.
• Use only accessories from PCE Instruments or equivalent.
• Before each use, inspect the case for visible damage. Do not use if damaged.
• Do not use the instrument in explosive atmospheres.
• ATTENTION: For impact tests, the maximum measurable value of the force gauge should be twice the applied impact load. Wear a mask and protective gloves during impact tests to avoid injuries.
• Do not use a bent or damaged test stand. Dropping can cause injuries.
• This device measures tensile and compressive forces only. The test head must not be bent or twisted.
• Overloading, excessive impact loads, or forces other than tensile and compressive forces can damage the sensor.
• Do not press keys with pointed objects.
• Keep the force gauge away from water, oil, and other liquids.
• Store the meter in a cool, dry place away from vibrations.
• Wire ports as described in this manual. Incorrect wiring can cause circuit failure or computer problems.
• Ensure the mains adapter is securely connected to the power outlet to prevent short circuits, electric shocks, and fire.
• When the battery is fully charged, remove the mains adapter immediately to avoid overheating, fire, or accidents.
• Non-observance of safety notes can cause device damage and user injuries.

PCE Instruments does not assume liability for printing errors or other mistakes in this manual. General guarantee terms are available in the general terms of business.

2 Specifications

2.1 Technical Specifications

Safety symbols are used for safety-relevant instructions. Non-observance can lead to device damage or personal injury.

• Symbol: ⚠️ Designation/Description: General warning sign. Non-observance can cause damage to the device and injuries to the user.
• Symbol: ⚡ Designation/Description: Warning: electrical voltage. Non-observance can cause electric shock.

General Specifications

2.2 Delivery Contents

• 1 x torque evaluator PCE-DFG N TW
• 1 x torque sensor
• 1 x 1.5 m sensor cable
• 1 x PC software
• 1 x USB cable
• 1 x mains adaptor
• 1 x carrying case
• 1 x sensor screw box
• 1 x quick start guide

3 System Description

3.1 Device

The device consists of the following main components:

• 1. Sensor connection
• 2. Display
• 3. Keypad
• 4. Torque sensor

3.2 Interfaces

The device features the following interfaces:

• 1. Input/output interface
• 2. USB interface
• 3. Power connection

Circuit diagram of output port:

1. Switch of external input / output

2. Output lower limit

3. Output upper limit

4. GND

3.3 Display (In measurement mode)

The display shows various information:

• 1. Memory usage
• 2. Measurement curve
• 3. Torque value
• 4. Upper alarm value
• 5. Clear by key
• 6. Maximum peak
• 7. Battery level indicator
• 8. Set sampling rate
• 9. Lower alarm value
• 10. First peak
• 11. Minimum peak

3.4 Function Keys

4 Getting Started

4.1 Power Supply

The PCE-DFG N is equipped with a rechargeable 1600 mAh 6 V Ni-Hi battery. Charge the battery using the supplied mains adapter. Charging takes 8 to 10 hours and should only be started when the battery is completely flat. Frequent or prolonged charging shortens battery life. A full charge provides up to 10 hours of continuous use. The device can also be used during charging. The battery can be charged approximately 500 times.

4.2 Settings

When in measurement mode, press the OK key to enter the settings screen, divided into two pages.

Page 1

• Display Unit: Set to "Nm", "lbfft", or "kgfm".
• Force Area: Set between 0.01 cm² and 999.99 cm². Used in "kPA" calculation for accuracy.
• Zero Tracking: Options: "Off", "0.1 N", "0.2 N", "0.3 N", "0.4 N", "0.5 N". Values below the set value are automatically excluded before zero point stabilization. Sampling rate becomes 1x per second after stabilization.
• Sampling Speed: Set the number of measurements per second (6 to 1600 Hz). Higher rates are for dynamic measurements; lower rates are for static measurements.
• Calibrate Grav: Enter the gravity at the calibration location.
• Alarm Upper: Set the upper alarm limit (+/- 9999.9).
• Alarm Mode: Choose "Within" (within alarm limit), "Beyond" (outside alarm limit), "Fracture" (overload alarm), or "Off". "Within" or "Beyond" displays alarm information. "Fracture" automatically sets Alarm Upper LV and Alarm Lower LV to "Fracture Alarm" and "Fracture Stop of Peak".
• Peak V. Hold: Select "On" or "Off". If "Off", peak value is not displayed.
• Factory Set A, B, C: For customer service only.

Page 2

• Capture Length: Set duration of curve capturing (1 to 1280 seconds), dependent on sampling rate.
• F/P Boundary: Set value (1 to 99999) to determine the first peak value.
• Serial Port: Controls real-time data transfer. Options: Prohibit, Key/Order, Change, Stabilize, Consecutive.
• Auto Power Off: Reduces energy consumption; device powers off after inactivity.
• Max Charge V: Displays maximum battery voltage.
• Clear Storage: Deletes saved measurement reports and curves. Important: If memory is full, data is automatically deleted to save new data.
• Factory Test: For customer service only.
• S/N: Displays the device serial number.
• Capture Trigger: Sets the condition that triggers capturing in curve capture mode.
• Baud Rate: Sets the baud rate for the serial interface (4800 to 230400 bps). Ensure correct setting for data retrieval.
• Display Angle: Set display angle to 0° or 180°.
• Auto Backlight: Reduces energy consumption by turning off display backlight after inactivity.
• Now Voltage: Shows current battery level.
• Reset: Resets the device to factory default settings.
• Language: Select output language (English or German).
• Connection: Shows the circuit diagram of the input port.

To change settings, use arrow keys to select menu items and OK to confirm. Use arrow keys to change values. Press OK to confirm or Back to discard.

5 Operation

5.1 Measurement

Connect the sensor to the meter. Switch on the device using the On/Off key. Check the battery level. If low, charge the device using the supplied mains adapter. Charging can be done while the device is on or off. A notification appears when fully charged; disconnect from power supply immediately.

To set parameters, press "OK" in measurement mode. Adjust unit, force area, zero tracking, sampling speed, alarms, Peak Hold, and capture trigger/length. Press "Back" to return to measurement mode.

For measurement, attach the device to a test stand. Press Zero and Arrow Right keys. You can perform a direct measurement (real-time force, peak values, not saved) or capture a curve (press Arrow Left key in measurement mode). Curve capture starts automatically when the trigger condition is met and ends when "OK" is pressed or capture duration is reached. Saved data can be retrieved using the "Query" button. Curves are deleted upon restart or new measurement. Up to 100 series of measurements can be saved.

Press "Back" to return to the measurement window. Press On/Off to switch off. Remove and clean the sensor if applicable. Store the device in its original carrying case.

6 Maintenance

6.1 Storage

Charge the battery before storing the meter for an extended period. Store the device, sensors, and accessories in the original packaging or carrying case to protect the components.

7 Appendix: Torque Sensor 5 ... 100 Nm

Technical drawings of the torque sensor with dimensions:

• Overall height: 83.1 mm
• Diameter: Φ 78 mm, Φ 71 mm
• Mounting hole diameters: Φ 6.4 mm, Φ 11 mm
• Mounting interface: 1/2"
• Outer diameter: Φ 90 mm, Φ 104 mm

8 Warranty

Warranty terms can be found in the General Business Terms at: https://www.pce-instruments.com/english/terms

9 Disposal

For battery disposal in the EU, follow directive 2006/66/EC. Batteries contain pollutants and must not be disposed of as household waste; use designated collection points. For device disposal, PCE Instruments complies with EU directive 2012/19/EU, either reusing or recycling devices. For countries outside the EU, dispose of batteries and devices according to local waste regulations.

For questions, contact PCE Instruments.

WEEE-Reg.-Nr. DE69278128

All PCE products are CE and RoHS approved.

PCE Instruments Contact Information

Contact information for PCE Instruments in various countries is provided, including addresses, phone numbers, fax numbers, and email addresses for Germany, United Kingdom, Netherlands, France, Italy, Spain, Turkey, Hong Kong, United States of America, and China.