FLIR CM83, Руководство пользователя

Страница: 31 / 52

5 Operation
1. Set the function switch to the position.
2. Ensure that the meter is set to active power measurement. If the or the
indicator is displayed, press the button repeatedly until none of
these indicators are displayed.
3. Take three measurements of the active power, in accordance with Figure 5.5.
4. To measure and display the power factor, press the button repeatedly
until the indicator is displayed.
5. Read the power factor value on the display.
• If the value is displayed without a sign, the phase of the current signal is
lagging behind the voltage signal (inductive load).
• If the value is displayed with a minus sign (–), the phase of the current sig-
nal is leading the voltage signal (capacitive load).
6. To return to active power measurements, press the button repeatedly
until neither the nor the indicator is displayed.
5.8.3 Phase rotation
With the meter set to Phase rotation mode, it is possible to determine the phase
rotation for a three-wire system.
NOTE
The system frequency must be stable.
#T559825; r. AI/33557/33557; en-US 25