23
1
φ
3W power measurement is similar to 3
φ
3W unbalanced
power measurement except the nomenclature is different.
Two measurements of W
RS(L1G)
and W
TS(L2G)
are required.
First, measure W
RS(L1G)
(refer to figure 11).
a. Turn the power on without clamping to any wire.
b. Set the rotary switch at 3
φ
3W.
c. Insert the test leads into the input jack.
d. Connect the test probe of the COM (black) terminal to
ground.
e. Connect the test probe of V (red) terminal to the second
phase (eg. L1).
f. Clamp the same phase as step e. (eg. L1).
g. The power clamp will automatically select proper range.
h. Wait until the reading is stable (about 3~6 seconds),
press the YELLOW button, and W
L23
symbol will appear
to instruct users to take measurement of W
TS(L2G)
.
Second, measure WTS (or WL2G) (refer to figure 12).
a. Disconnect the test probe from the phase where jaws
clamped in the previous measurement.
b. Connect the test probe to the L2 line.
c. Clamp the L2 line where test probe is connected to.
d. The power clamp will automatically select proper range.
e. Wait until the reading is stable (about 3~6 seconds), press
the YELLOW button.
The power clamp will add the two values together and show
the result on the LCD. At this moment the watt of 1
φ
3W
power is stored in the memory.
W
1
φ
3W
= W
RST
= W
RS(L1G)
+
W
TS(L2G)
If willing to read the details of that singly data record,
please refer to 5-9.
If willing to record data (W
L1G
or W
L2G
), press “RECORD”
button to complete.
