HP Extech 380976 - Manual (Page 13)

380976 V3.2 4/11 13
KW+KVAR, KVA+θ(Phase Angle) or A+V displays.
6. W
3 φ 4W
= W
R(L1)
+ W
S(L2)
W
T(L3)
KVA KW KVAR
W W W 3 4
2
3 4
2
3 4 φ φ φ
= +
PF
KW
KVA
W
W
W
3 4
3 4
3 4
φ
φ
φ
=
7. Set the rotary switch to another position to exit this mode and clear the stored data.
NOTE
1. The "+" sign printed on meter must face the power source for accurate
measurement.
2. If the device under test is switching power supply, the KW, PF and θ readings
may not be correct.
NOTE
For 3φ4W power measurements, W
R
or W
S
and W
T
must be positive. If one shows
negative power, check the connections.
Resistance and Audible Continuity Measurements
WARNING
Before taking any in-circuit resistance measurements remove power from the circuit under test
and discharge all capacitors.
1. Set the rotary switch to the ‘Ω, ’ ’ or ‘MΩ ’ position.
2. Insert the test leads into the input jacks. (Black to ‘COM’ and
Red to ‘ Ω’ )
3. Connect the test leads to the circuit or component under test.
4. Read the resistance value on the LCD.
5. For measurements < 40 Ω , the continuity beeper will sound.