Sper Scientific 840052 Data Acquisition Software - Manual (Page 6)

If a meter could export more than two parameters, users could
choose any two of them to set alarm values.( See Diagram B-1)
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Diagram B
Diagram B-1
Diagram C
Click Alarm SW button (See Diagram C) to active the limit setting,
afterwards, High/ low limit can be keyed in directly or by clicking
to increase or to decrease figures.