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 ja
ck.
d. Connect
the test probe of t
he COM (black) terminal to
ground.
e. Connect the t
est probe of V (red) term
inal to the second
phase (eg. L1).
f. Clam
p the same phase
as step e. (eg. L1).
g. The power clamp will automat
ically select proper range.
h.
Wait until the reading is
stable (about 3~6 seconds),
press the YELLOW butt
on, and W
L23
symbol will appear
to instruct users to take measurement of W
TS(L2G)
.
Second, measure W
TS
(or W
L2G
) (refer to figure 12).
a. Disconnect the test probe from t
he phase where jaws
clamped in the previous m
easurement.
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 st
able (about 3~6 seconds), press
the YELLOW but
ton.
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
1φ3W
= 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.
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