American Weigh Scales (AWS) Mercury - Manual (Page 3)

I. Display Overview
II. Battery Installation
This scale should come with the batteries already installed.
However you must remove the plastic insulator strip
before first use. To install the batteries, turn the scale over
and remove the battery cover. Insert four (4) AAA battery
according to the diagram below. Replace the battery cover.
III. Turning the Scale On and Off
This scale has an Auto-On and Auto-Off feature. The scale
will automatically turn on when the user steps on the
platform and automatically turn off after the user steps
off the platform. This scale is ready to weigh, and does not
require tapping first before stepping on the scale.
Weight Weighing Unit