1. Measurement steps: - Step 1. Prepare the part to be measured. - Step 2. Keep at least 2 cm away from metal objects and press the switch button to turn on the device. Note: It is recommended to use “zero - point calibration” to zero the device before testing. - Step 3. Place the probe vertically and quickly on the surface to be measured until you hear a drop sound and the screen displays the measurement value. Then lift the probe at least 2 cm away from the part to be measured, and another measurement can be carried out. Note: If the automatic shutdown function is activated and no operation is performed within 3 minutes, the meter will automatically turn off. 2. Specifications: - Material: ABS - Color: Orange, black (optional) - Display screen: Horizontal, vertical (optional) - Measurement range: 0 - 2000 µm - Accuracy: ±(3% + 1 µm) - Resolution: 0 µm ~ 99.9 µm (0.1 µm), 100 µm ~ 999 µm (1 µm), > 1000 µm (0.01 mm) - Zero - point calibration: Supported - Statistical data: Average value, minimum value, maximum value, count - Unit: um, mm, mil - Minimum convex arc: 5 mm - Minimum concave arc: 25 mm - Minimum measurement range: Diameter 20 mm - Minimum support thickness: 0.2 mm - Maximum measurement speed: 2 measurements per second - Power supply: 2 x 1.5 V 7 - cell batteries (not included) - Operating environment temperature: 0 ~ 50 °C, 20 ~ 90 % RH (no condensation) - Storage environment temperature: - 10 ~ 60 °C, 20 ~ 90% RH (no condensation) - Dimensions: 113 mm x 53 mm x 24 mm - Weight: 80 grams 3. Package list: 1 x Sensor, 1 x Calibration part, 1 x Instruction manual.