A&D GR Series GR-300 - Manual (Page 14)

5. Wéighing
Cautions for the weighing operation
□ Operate your balance gently.
□ Press the RE-ZERO key to prevent possible error before placing material
on the pan (weighing material) each time.
□ Shorten the operation time as much as possible. ( Opening and closing
door, placing and removing material)
□ Temperature changes during measurement may cause weighing error.
□ Use a pair of tweezers (pincette) to avoid a temperature change that Is due
to having your hand in the weighing chamber.
□ Calibrate your balance periodically to maintain weighing accuracy. Refer
to section "T.Calibration".
□ Electrified material or magnetic body may cause a weighing error.
□ Do not press keys with a sharp instrument (such as a pencil or ball
point pen).
□ Do not drop things on the pan, or place a weight on the pan that is
beyond the weighing range of the balance.
□ Keep the area clean and dry.
□ Consider section "2. Caution" for weighing operation.
Basic Operation (gram mode)
Step 1 Calibrate your balance before use. (Refer to section "7. Calibration")
Step 2 Place a container on the weighing pan, if necessary.
Press the | RE-ZERO | key to cancel net weight. The balance displays zero.
Container: A vessel placed on the pan, but not to be included in the
weighing data.
Step 3 Place material on the pan or in the container.
Step 4 Wait for the stabilization indicator to be disipayed and read the value.
Step 5 Remove the material and container from the pan.
Basic operation page 13
5. Weighing