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Fig.9
21
d. If the watt reading is not zero, press the DCA/
DCWZERO button once to zero the watt reading
e. Clamp on to the third phase where test prod is
connected (eg. T or L3)
f.
The power clamp will automatically select proper range.
g. Wait until the reading is stable, press the NEXT button,
and W
(or W
) symbol will disappear. At this moment,
ST
L2L3
W
(or W
) is stored in the memory,
ST
L2L3
3.7.4. Once the NEXT button is pressed after measurements of
W
(or W
) and W
(or W
RS
L1L2
ST
the two values together and show the result on Ihe LCD.
W
symbol will be shown to indicate the watt of 3f3W
RST
unbalanced Power (refer to figure 9). PF is not shown in
3f3W unbalanced power mode.
W
= W
= W
3f3W
RST
RS(L1L2)
NOTE:
Once a phase is selected as COM, users can not change this
selection in the subsequent measurement. For example, if S
(or L2) phase is selected, S (or L2) phase is always connected to
the COM of power clamp during measurement of W
and W
(or W
) in 3f3W unbalanced power.
ST
L2L3
NOTE :
The "+" sign printed on jaw must face the power source, and
make sure all the connections and clamping are corred for correct
measurement.
NOTE : In the 3f3W unbalanced power measurement, one of
W
or W
could be negative. So users must make sure all the
RS
ST
connections and clamping are correct to obtain correct power.
23
), the power clamp will add
L2L3
+ W
ST(L2L3)
(or W
RS
L1L2
3.7.1. Two measurements of W
required
3.7.2. Firstly, measure W
a. Turn the power on without clamping on to any wire.
b. Set the rotary switch at 3f.
c. Press the 3f button once. and only the 3f3W symbol
is lett in LCD. At this momeni, the W
instruct users to take measurement of W
d. If the watt reading is not zero, press the DCA/DCW
ZERO button once to zero the watt reading
e. Insert the test leads into the input jack.
f.
Select one phase (eg. S or L2) as COM and connect
the test prod of the COM (black) terminal to that phase
(eg. S or L2).
g. Connect the test prod of V (red) terminal to the second
phase (eg. R or L1).
h. Clamp on to the same phase as in step g. (eg. R or L1).
i.
The power clamp will automalically select proper range.
j.
Wait until the reading is stable, press the NEXT button,
and W
W
RS
appears and blinks to instruct users to take measurement
of W
ST
3.7.3. Secondly, measure W
a. Disconnect the test prod from the phase where jaws is
clamp on in previous measurement.
b. Connect the test prod to the third phase (eg. T or L3).
c. Open and close the jaws, so power clamp is clamping
to nothing
3.8. 3f f f f f 4W (Neutral included) AC+DC Unblanced Power
Measurment.
)
4500 : 28-09-2012
(or W
) and W
RS
L1L2
(or W
) (refer to figure 7).
RS
L1L2
RS
(W
) symbol will disappear. At this moment,
RS
L1L2
is stored in the memory, and W
(W
).
L2L3
, (or W
) (refer to figure 8).
ST
L2L3
(or W
) are
ST
L2L3
symbol blinks to
RS
(W
) symbol
ST
L2L3
22
24
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