10.2
Functions Specifications
156
3.Hold Functions
4.Calculation Functions
10.2 Functions Specifications
1.AUTO range Function
Function Automatically selects voltage and current ranges according to measured amplitude on each phase.
Operating states Selectable on or off for each phase system
Auto-ranging span Wide/Narrow (common to all wiring systems)
Wide:...... when a phase system’s peak-over or rms value is above 110% f.s., increments one range,
and, when all rms values within the phase system are below 10% f.s., decrements two
ranges (except when peak-over occurs in the lower range, in which case no range decre-
menting occurs).
Narrow:... when a wiring system peak over or rms value is above 105% f.s., increments one range,
and, when all rms values within the wiring system are below 40% f.s., decrements one
range (except when peak-over occurs in the lower range, in which case no range decre-
menting occurs).
13⁄
When Δ-Y conversion is enabled, the range-decrementing voltage is (approximately 0.57735) f.s.
2.Timing Control Functions
Interval OFF, 50 ms, 100 ms, 200 ms, 500 ms, 1 s, 5 s, 10 s, 15 s, 30 s
1 min, 5 min, 10 min, 15 min, 30 min, 60 min
Setting determines the maximum data-saving capacity
Timing controls OFF, Timer, RTC
Timer: 10 s to 9999:59:59 [h:m:s] (in seconds)
Real-Time Clock: Start and stop times (in minutes)
(1) Hold
Function Stops all updating of displayed measurement values and waveforms, and holds display. However,
the clock and peak-over display continue to be updated.
Disabled when the peak-hold function is enabled.
Data updating The next display data update occurs when the HOLD key is pressed again, at the end of the mea-
surement interval, or when an external sync signal is detected. Internal data is updated every 50 ms
(independent of the display data update interval). Waveform and noise data are updated when cal-
culation finishes.
Output data Held values are present at D/A output and are saved to CF card (although waveform output contin-
ues).
With auto-saving enabled, data is saved immediately before it is updated.
Display The HOLD indicator appears when Hold is active.
Backup Not applicable (the function is deactivated upon recovery from power outages.)
(2) Peak Hold
Function All measurement values are updated to display the maximum value for each measurement.
However, displayed waveforms and integration values continue to be updated with instantaneous
values.
When averaging is enabled, maximum values are displayed after averaging.
Cannot be used together with the display-hold function.
Data updating Displayed data is cleared when the HOLD key is pressed again, at the end of the measurement in-
terval, or when an external sync signal is detected.
Internal data is updated every 50 ms (independent of the display refresh interval).
Output data Held values are present at D/A output and are saved to CF card (although waveform output contin-
ues).
With auto-saving enabled, data is saved immediately before it is updated.
Display The PEAK HOLD indicator appears when Peak Hold is active.
Backup Not applicable (the function is deactivated upon recovery from power outages.)
(1) Rectification System
Function Select which voltage and current values to used for calculating apparent and reactive power, and
power factor
Method rms/ mean (voltage and current in each phase system)
(2) Scaling
VT (PT) ratio OFF/ 0.01 to 9999.99 (Settings for which VT×CT exceeds 1.0E+06 are disallowed.)
CT ratio OFF/ 0.01 to 9999.99 (Settings for which VT×CT exceeds 1.0E+06 are disallowed.)
Display An indicator is displayed when scaling.
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