probst SH-2500-UNI-GL Operating Instructions Manual page 114

Operation
1. Set the main switch (2) to 1.
2. Press the button (17.5) on the battery (17).
 The battery is activated.
3. Position the lifting device over the load's center of
gravity.
4. Carefully lower the lifting device onto the load.
5. Ensure that the entire area of the suction plate(s) is
touching the load.
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