Operating instructions

University of Saskatchewan
Electrical Engineering Laboratory Equipment Manual
If the load consumes little power, then the connection on the right will yield a
more accurate reading. If the load consumes a moderate to high quantity of power,
then the connection on the left will give a more accurate reading.
As with the ammeters, most of the wattmeters have been retrofitted with a
shorting switch. Follow the same procedure as with the ammeters regarding the use of
this switch.
± 5 A
120 V
±
W
Source
Load
+
-
± 5 A
120 V
±
W
Source
Load
+
-