Cablematic BV051 Manual De Instrucciones página 7

CALIBRATION MANUAL FOR CABLEMATIC SCALES MODELS BV051, BV052
With the scale off, connected to the 220w socket and to the base of the scale with the DB9 connector,
press and hold down the "#" key and turn on the rear switch.
With the "#" key pressed, turn on the scale.
We will stop pressing the "#" key when the number 9999 appears on the screen and it stays on that screen
for 2 seconds. Then we release and this screen will appear. We will leave it as it appears in the photo: