American Weigh Scales (AWS) Mini-Pro-50 - Manual (Page 5)

VI. Auto-Off Feature
This scale has an Auto-Off feature that can help extend battery
life by turning the scale off when not in use for a set amount
of time (1-9 minutes). To change the Auto-Off timer, press the
“Menu” button three times. The scale will show the current
Auto-Off setting (OFF, 60, 120, 180, 240, 300, 360, 420, 480,
or 540)
Press the “Unit” button to cycle through until you find the
desired timer duration (in seconds). Press “Tare” to confirm
your selection.
VII. Calibration
This scale is calibrated at the factory, but frequent use or
slight shock can sometimes affect the calibration. In such
cases you may need to recalibrate the scale. Typically, the
Standard Calibration method is sufficient for the average
user to recalibrate their scale. Advanced calibration is already
performed at the factory and should not be attempted unless
you have two calibration weights. Before starting calibration,
insure that the area you are working on is free of any drafts,
vibrations, and you are using a flat level surface
• Standard Calibration (Span):
**MiniPRO-50 calibrates with a 20g or 50g weight.
**MiniPRO-100 calibrates with a 50g or 100g weight.
Press the “Menu” button one time, “SCALE” will be displayed
on the LCD; Press the “Tare” button to continue. The scale will
display the required calibration weight. You can press “Unit”
to change between the two available calibration weights (see
above). Press “Tare” to confirm. The value on the display will
flash. Place your calibration weight onto the weighing platform.