Hioki 3390 - Display Functions

10.2 Functions Specifications
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Chapter 10 Specifications
5. Display Functions
(3) Average
Function Averages all instantaneous measurement values including harmonics (but not peak, integration, or
FFT noise values).
When averaging is enabled, the averaged data is saved.
Method Indexed average (applied at 50 ms data update intervals)
Averaged voltage (U), current (I), and power (P) values are used for calculations.
rms values are averaged for harmonic amplitude, and instantaneous values are averaged for relative
harmonic content.
Phase angle is calculated from the average real and imaginary components after FFT.
Phase difference, distortion and imbalance are calculated from the above data after averaging.
Ripple factor is calculated from averaging the differences in peak values.
Response time OFF, FAST, MID, SLOW
(time remains within specified accuracy when input changes from 0 to 100% f.s.)
Corresponding response times are 0.2, 1.0, and 5 s
Display The AVG indicator is displayed when averaging is enabled.
(4) Efficiency and Loss Calculations
Function Efficiency η [%] and Loss [W] are calculated from active power values measured on each phase and
system.
Calculation items Active power (P) of each phase and system
Motor power (Pm) when motor evaluation option 9791 or 9793 is installed
Calculation accuracy Measurements applied to formulas are handled as 32-bit floating point values.
When calculating parameters between wiring systems with different power ranges, the higher range
is used.
Calculation rate At every 50 ms data update interval
When calculating between wiring systems having different sync sources, the most recent data is
used at calculation time.
Maximum no. of simultaneous cal-
culations
Efficiency and loss, by three formulas
Calculation method Parameters specified for P
in
and P
out
are applied as follows
η = 100 × |Pout| / |Pin|, Loss = |Pin| - |Pout|
(5) Δ - YCalculation
Function For 3P3W3M systems, converts between line-to-line voltage and phase voltage waveforms using a
virtual center point. All voltage parameters including harmonics such as true rms voltage are calcu-
lated as phase voltage waveforms.
Calculation method U1s = (U1s-U3s)/3, U2s = (U2s-U1s)/3, U3s =U3s-U2s)/3
(1) Wiring Check screen
Function The wiring diagram and voltage/current vectors are displayed for the selected wiring system(s). The
correct range for the wiring system is shown on the vector display, to confirm proper measurement
cable connections.
Start-up mode The Wiring Check screen can be set to always appear upon start-up (Start-Up Screen setting).
Basic settings Selects auto-ranging for voltage and current on each wiring system, and sets each value to its de-
fault. Not available when integration or the Hold function is enabled.
(2) Independent wiring system display mode
Function Displays power and harmonic measurement values for channels 1 to 4.
A composite measurement line pattern is displayed for each system.
DMM Basic, voltage, current, and power measurement parameter screens
Harmonics Bar Graph, List or Vector screen
(3) Display Selections
Function Select to display any 4, 8, 16, or 32 of the basic measurement parameters.
Display Layout 4, 8, 16, or 32 parameters, Independently set for each screen
(4) Efficiency and Loss Screen
Function The efficiency and loss obtained by the specified calculation formulas are displayed numerically.
Display Layout Three efficiency and three loss values.
(5) Waveform & Noise Screen
Function Voltage and current waveforms sampled at 500 kHz and noise measurements are displayed com-
pressed on one screen.