1. Introduction
This manual provides detailed instructions for the safe and effective operation of the INSIZE 2173-360 Electronic Level and Protractor. This precision instrument is designed for accurate angle measurement in various applications, offering a measurement range of 0 to 360 degrees (90 degrees x 4). Please read this manual thoroughly before using the device to ensure proper function and to prevent damage.
2. Safety Information
- Keep the device away from strong magnetic fields, as this may affect accuracy.
- Avoid dropping the device or subjecting it to severe impact.
- Do not expose the device to extreme temperatures or direct sunlight for prolonged periods.
- Do not attempt to disassemble or modify the device. Repairs should only be performed by qualified personnel.
- Dispose of batteries according to local regulations.
3. Product Overview
The INSIZE 2173-360 is an electronic level and protractor featuring a durable aluminum frame and a magnetic bottom with a V-groove for secure attachment to shafts and other metallic surfaces. It provides digital angle readings on its LCD display.

Figure 1: INSIZE 2173-360 Electronic Level and Protractor. The device features a digital display, an 'on/off' button, and 'hold' and 'zero' buttons. The model number '2173-360' is printed on the front panel.
3.1 Components and Controls
- LCD Display: Shows angle readings and status indicators (e.g., ABS for absolute mode).
- ON/OFF Button: Powers the device on or off.
- ZERO Button: Sets the current position as the relative zero point.
- HOLD Button: Freezes the current reading on the display.
- Magnetic Base with V-groove: Allows for secure attachment to ferrous materials and curved surfaces.
- Battery Compartment: Located on the back, houses the CR2032 battery.
4. Setup
4.1 Battery Installation
The device requires one CR2032 battery (included). If the display is dim or unresponsive, replace the battery.
- Locate the battery compartment cover on the back of the device.
- Use a small screwdriver or coin to open the cover.
- Insert the CR2032 battery with the positive (+) side facing up.
- Replace the battery compartment cover securely.
5. Operating Instructions
5.1 Power On/Off
- Press the ON/OFF button to turn the device on. The display will illuminate and show the current angle.
- Press and hold the ON/OFF button for approximately 3 seconds to turn the device off.
- The device features an automatic power-off function to conserve battery life if inactive for a certain period.
5.2 Zero Setting (Relative Measurement)
The zero setting allows you to establish a relative zero point on any surface, enabling measurement of angles relative to that specific surface.
- Place the protractor on the reference surface where you want to set the zero angle.
- Press the ZERO button. The display will show "0.00°" and the "ABS" indicator will disappear, indicating relative measurement mode.
- Move the protractor to the surface you wish to measure. The display will show the angle relative to your set zero point.
5.3 Absolute Measurement
When the device is powered on, it typically defaults to absolute measurement mode, indicated by the "ABS" icon on the display. In this mode, angles are measured relative to a true horizontal plane.
- To switch back to absolute measurement from relative mode, press the ZERO button again. The "ABS" indicator will reappear.
5.4 Hold Function
The hold function allows you to freeze the current reading on the display for easier viewing.
- While measuring, press the HOLD button. The current angle reading will be frozen, and a "HOLD" indicator may appear on the display.
- Press the HOLD button again to release the reading and return to live measurement.
6. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the protractor in a clean, dry environment, away from dust and direct sunlight.
- Battery Replacement: Replace the CR2032 battery when the display becomes dim or the device fails to power on. Refer to Section 4.1 for instructions.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low or dead battery. | Replace the CR2032 battery. |
| Inaccurate readings. | Device not properly zeroed; strong magnetic interference; physical damage. | Perform zero setting on a known flat surface. Move away from magnetic sources. If damage is suspected, contact support. |
| Display is dim or flickering. | Low battery power. | Replace the CR2032 battery. |
8. Specifications
- Model: 2173-360
- Measurement Range: 0-360° (4 x 90°)
- Protection Rating: IP54 (Dust protected, splash resistant)
- Frame Material: Aluminum
- Base: Magnetic with V-groove
- Power Source: 1 x CR2032 battery (included)
- Functions: ON/OFF, ZERO, HOLD, Automatic Power Off
- Product Dimensions: Approximately 7.87 x 5.91 x 1.97 inches (200 x 150 x 50 mm)
- Weight: Approximately 13.44 ounces (381 grams)
9. Warranty and Support
For warranty information or technical support, please refer to the documentation provided with your purchase or contact INSIZE customer service through their official website. Keep your purchase receipt for warranty claims.