5.4 Functional Specifications
154
Auto-range (AUTO)
Range select and zero-cross filter’s threshold level settings
Averaging (AVG)
5.4 Functional Specifications
Functions Automatically changes the voltage and current range according to the input.
Operation Pressing the AUTO key turns on the auto-range function (causing the AUTO lamp to
light up). Pressing the AUTO key again turns the auto-range function off, as does press-
ing any range key (causing the AUTO lamp to turn off).
Range up: The range is increased when input exceeds 150% of the range or when
the peak is exceeded.
Range down: The range is decreased when input falls below 15% of the range.
However, the range is not decreased when the peak is exceeded at the
lower range.
The input level is monitored, and the range is switched over multiple ranges.
Range select can be used to disable ranges so that they are not selected.
Default state Voltage/ current AUTO range: OFF
Functions Selects whether to enable (turn on) or disable (turn off) individual voltage and current
ranges.
Sets the zero-cross filter’s threshold level for voltage and current ranges.
Range select Enabled (use): Ranges can be selected with the range keys.
Range switching occurs using auto-range operation.
Range switching occurs during auto-range integration.
Disabled (do not use): Ranges cannot be selected with the range keys.
Range switching does not occur using auto-range operation.
Range switching does not occur during auto-range integration.
Zero-cross filter’s
threshold level
Set from 1% to 15% (in 1% intervals).
Display When there is a range that has been disabled or for which the zerocross threshold revel
is a value other than 1%: The RANGE SEL lamp will light up.
Default state All voltage and current ranges.: ON, zero-cross filter’s threshold level: 1%
Functions Averages the voltage, current, active power, apparent power, and reactive power. (Oth-
er than harmonic measurement parameters.)
The power factor and phase angle are calculated from averaged data.
Averaging is not performed for parameters other than those listed above.
Method Simple averaging
Number of averaging
iterations and display up-
date interval
Display The AVG lamp will light up when the number of averaging iterations is set to a value
other than 1 (off). From the start of averaging until the first average value is displayed,
the AVG lamp will flash, and all measured values will be shown as [- - - - -] (invalid data).
Over-range warning When the data being averaged includes an [o.r] value, the corresponding unit will flash.
Start of averaging Averaging is started or restarted at the following times:
1. After the instrument starts up
2. After zero-adjustment operation is complete.
3. After settings related to averaging, for example the number of averaging iterations
or the range, are changed
Default state Number of averaging iterations: 1 (OFF)
Number of averaging
iterations
1 (OFF) 2 5 10 25 50 100
Display update interval 200 ms 400 ms 1 s 2 s 5 s 10 s 20 s
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