User manual

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3.2.6
The
key
This key is used to display the value relative to a reference
stored when the key was pressed.
For example, if the value stored when the key was pressed =
10V and the current value is 11.5V, the display in relative mode
will be 11.5 - 10 = 1.5V.
Note: the Auto-Range mode is deactivated.
Each press of
this length…
…serves to
short
 to display the relative value ;
 to exit from the
mode.
long
(> 2 sec)
To deactivate automatic switching off.