Using nothing but a pocket scale and a flat surface such as a countertop, find the total mass of the scale, including the attached metal plate and the plastic tray/cover (left).
Details about the scale:
- If you press the TARE button, the scale's zero point will be set to whatever weight is currently on the scale.
- After using the TARE function, any weight placed on the scale will be displayed as a positive number and any weight removed from the scale will be displayed as a negative number.
- When you power on the scale with the ON/OFF button, it will wait for 3 seconds, then automatically trigger the TARE function.
- Values are displayed in grams.
- The scale's strain gauge is located between the metal plate and the body of the scale. The bar that the strain gauge is attached to has negligible mass.
- You may not use the UNIT or PCS functions.
Edit: Some additional details requested in comments:
- When sitting upright, the metal plate is the highest point on the scale. The metal plate does not come in contact with the plastic cover when the cover is on.
- The scale weighs less than the weight limit (300 grams).
The center of mass in the X-Y plane is within the metal plate, as determined by this method — the scale will not tip if set upside down.