YOKOGAWA WT5000, Features Manual

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3-1
IM WT5000-01EN
3 Input Settings (Basic Measurement Conditions)
Input Settings (Basic Measurement Conditions, Input (Basic))
You can specify the following items.
•
Wiring system (Wiring)
• Selecting the element for setting the measurement range (Element1 to 7, 1 to 7 (ELEMENTS))
• Voltage range (Voltage, VOLTAGE RANGE)
• Auto voltage range (Auto (Voltage), AUTO)
• Current range (Current, CURRENT RANGE)
• Auto current range (Auto (Current), AUTO)
• External current sensor on/off (Ext Sensor)
• External current sensor conversion ratio (Sensor Ratio)
• Scaling (Scaling)
• Line filter (Line Filter)
• Frequency filter (Freq Filter)
• Measurement Period (Sync Source)
Wiring System (Wiring)
The following five wiring systems are available on the instrument. The selectable wiring systems vary depending
on the number of installed input elements.
• 1P2W: Single-phase two-wire system
• 1P3W: Single-phase three-wire system
• 3P3W: Three-phase three-wire system
• 3P4W: Three-phase four-wire system
• 3P3W(3V3A): Three-voltage three-current method
Wiring Unit
Wiring units are sets of two or three input elements of the same wiring system that are grouped together. You
can define up to three wiring units: ΣA, ΣB, and ΣC.
• When there is one wiring unit, that unit is ΣA. You cannot make ΣB or ΣC the first wiring unit.
• When there are two wiring units, those units are ΣA and ΣB. You cannot make ΣC one of the first two wiring
units.
• When there are three wiring units, those units are ΣA, ΣB, and ΣC.
• When there are multiple wiring units, element numbers are assigned to them in ascending order. The element
numbers are assigned to ΣA, ΣB, and then ΣC.
• Wiring units are composed of input elements that are next to each other. Wiring units cannot consist of input
elements that are not next to each other.
• Wiring units cannot consist of input elements that are different types.
Σ Functions
The measurement function of a wiring unit is called a Σ function.
For example, “UrmsΣA” corresponds to the average of the voltages of the input elements that are assigned to
the wiring unit ΣA. The average value represents the true rms value.