User Manual for Neo Tools Digital Caliper 150mm (75-011)

Quick guide from the manual

The Neo Tools 75-011 is a precision digital caliper designed for external, internal, and depth measurements. Before use, ensure all measurement surfaces are clean and free from grease, dust, or metal filings. Use a soft cloth to wipe the surfaces. Do not use organic solvents like benzene or acetone. Always loosen the slider lock screw before attempting to move the slider.

Device Overview

The caliper consists of the following main components:

• External measurement jaws
• Internal measurement jaws
• Depth measurement rod
• Slider with LCD display
• Slider lock screw
• Slider shift roller
• Unit toggle button (mm/inches)
• Zero adjustment button (ZERO)
• ON/OFF button
• Battery compartment

Operation

General Operation:

1. Loosen the slider lock screw.
2. Press the ON/OFF button to activate the display.
3. Select the desired unit (mm or inches) using the toggle button.
4. Use the slider shift roller to move the jaws.
5. To zero the display at any point within the measurement range, press the ZERO button.

Measurement Techniques:

• External measurements: Place the object between the external jaws and close them until they touch the object.
• Internal measurements: Insert the internal jaws into the object's opening as far as possible.
• Depth measurements: Insert the depth measurement rod into the hole and position the guide perpendicular to the reference surface.
• Differential measurements: Use the ZERO button to set a reference point and measure deviations from that norm.

Maintenance

Keep the caliper dry and clean. If the device will not be used for an extended period, remove the battery to prevent leakage. To replace the battery, unscrew the battery compartment lid, remove the old battery, and insert a new one (SR44 type) with the positive side facing up.

Troubleshooting

If the display flickers, the battery voltage is likely below 1.45V and needs replacement. If there is no display, check the battery voltage and ensure it is seated correctly with the proper polarity. If the display does not change when the slider moves, remove the battery for 30 seconds to reset the internal circuit. If accuracy is lower than specified, the sensor may be dirty; clean the interior with compressed air.

Technical Specifications

• Measuring range: 0 - 150 mm / 0 - 6 inches
• Resolution: 0.01 mm / 0.0005 inches
• Accuracy: +/- 0.02 mm / +/- 0.001 inches
• Maximum measuring speed: 1.5 m/s
• Power supply: Silver oxide (AgO) 1.55V, type SR44, 180 mAh
• Working temperature: 5°C - 40°C