382075 V2.2V 9/10
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2. Measure WS (L2).
a.
Connect the V (red) test lead to the second phase S (L2).
b.
If the watt reading is not zero, press the DCA/DCW ZERO button once to zero
reading
c.
Clamp on to the second phase S (L2)
e.
The power clamp will automatically select the proper range.
f.
Wait until the reading stabilizes, then press the NEXT button. The W
S
symbol will
disappear. W
S
is now stored in memory.
3. Measure WT (L3).
a.
Connect the V (red) test lead to the third phase T (L3).
b.
If the watt reading is not zero, press the DCA/DCW ZERO button once to zero
reading.
d.
Clamp on to the third phase T (L3).
e.
The power clamp will automatically select the proper range.
f.
Wait until the reading stabilizes, then press the NEXT button. The W
T
symbol will
disappear and W
T
will be stored in memory,
4. Once the NEXT button is pressed (after measurements of W
R
, W
S
, and W
T
), the power
clamp will add the three values W
R
, W
S
, and W
T
together and display the result on the
LCD. The WRST symbol will appear indicating that the reading shown is the wattage of
the 3
φ
4W unbalanced circuit. PF is not shown in the 3
φ
4W unbalanced power
measurement mode.
NOTE:
The "+" sign printed on jaw must face the power source.
NOTE:
In the 3
φ
4W unbalanced power measurement mode, all three W
R
or W
S
and W
T
readings must be positive. If one is negative, check the connection of the
test leads and the clamping of jaw. Make sure test lead and clamp connections are
correct to obtain useful power readings.
