A&D UC-321 Instruction Manual page 7

Displaying the Weight Data Stored in the Scale
The stored measurement data is displayed in order, beginning with the most
recent measurement.
1
Set the slide switch to "MEMORY".
2
With the scale turned off, press and hold
the measurement switch gently.
The weight data are displayed in order from the
last result. The scale is automatically turned off.
If you want to stop displaying the data, press
the measurement switch.
Slide switch
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Measurement switch