Hornady GS-1500 - Manual (Page 4)

CALIBRATION
Calibration is NOT required before fi rst use. Only calibrate if
scale is not weighing properly. Make sure you use the correct
calibration weight for your scale or the calibration will not be
accurate - GS-1500: 100g calibration weight
Calibration Procedures for GS-1500
Turn on the scale by pressing [ON/OFF] key. 1.
Wait until the LCD displays "0.00" and then press 2.
and HOLD the [MODE] key for 3 seconds, the LCD will
display "CAL" then release the [MODE] key.
Press the [MODE] key again, the LCD will display
3.
"CAL" and then "100.00"
Add a 100g calibration weight, the display will show
4.
"PASS" and return to normal weighing mode.
Put away the calibration weight and press [ON/OFF]
5.
to turn of the scale and the calibration is fi nished!