Besantek BST-ET14, Instruction Manual, Page: 18 / 28

-16-
(5) Calculating Power Consumption of Appliance.
V
L-N
= measured through the test sockets.
I
L
= measured through the clamp meter and Red
ear.
P = V
L-N
x I
L
Connect a DMM onto the L and N test sockets to
measure V
L-N
.
Clip clamp meter around the red ear to measure I
L
.
Connect appliance to the appliance socket of the
tester.
Switch appliance ON.
Write down V
L-N
from the multimeter.
Write down I
L
from the clamp meter.
Switch appliance OFF and disconnect tester from
mains.
Calculate Power of Appliance.
P
appliance
= V
L-N
x I
L
Warning
Please choose the clamp meter
with a proper resolution