FLIR CM83, Руководство пользователя

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5 Operation
3. Press the trigger to open the clamp jaws. Fully enclose one conductor—refer
to Figure 5.1. For optimum results, center the conductor in the jaws.
NOTE
The + symbol on the jaw should be directed toward the power source.
4. Connect the probe leads in parallel to the part under test.
5. Read the active power value on the display.
• If the value is displayed without a sign, the power is flowing from the
power source to the load.
• If the value is displayed with a minus sign (–), the power is flowing from
the power load to the source.
6. To measure and display the power factor, press the button repeatedly
until the indicator is displayed.
7. 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).
8. To return to active power measurements, press the button repeatedly
until neither the nor the indicator is displayed.
If an overload occurs, the following is displayed:
• OL. V : Voltage overload or both voltage and current overload.
• OL. A : Current overload.
• OL. kW : Active power overload.
5.8.2 Three-phase power measurements
5.8.2.1 Three-phase three-wire balanced/unbalanced
The power of a three-phase three-wire delta configuration is measured in two
steps, in accordance with Figure 5.4. The total power is the sum of the two meas-
urements:
W = W
1
+ W
2
.
#T559825; r. AI/33557/33557; en-US 22