ITech IT7930-350-180 - Chapter 7: Measurement Functions; Meter, Oscilloscope, and Harmonic Analysis

Measurement Functions
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Chapter7 Measurement Functions
This chapter describes the characteristics and operations of the basic metering
function of IT7900 series source.
IT7900 series source has rich functions of basic metering of electric energy and
can accurately measure the parameters such as Vrms, Irms, Ipeak, Idc, CF, PF.
7.1 Meter Mode
Press on the front panel to enter the metering interface. Different
modes display different interfaces, but the displayed measurement parameters
are the same. Take AC single-phase mode as an example, the measurement
interface is shown in the figure below.
Description of the metering parameters:
Parameter
Description
A
Single mode
Voltage Vrms
Setting voltage
AC/ACDC
mode: Vac setting value
DC/DCAC mode: Vdc setting value
Frequency Hz
Setting frequency
Only valid in AC/ACDC/DCAC mode.
Uac
AC voltage(rms)
Iac
AC current(rms)
Freq
Frequency(Hz)
P
Active power [W]
V-THD
Voltage THD
PF
Power factor
CF
Crest factor
Ipk+
Positive current peak value [A]
Ipk-
Negative current peak value [A]
S
Apparent power
Q
Reactive power