Hioki PW8001-11 - Page 62

56
Measuring Power
Range settings on [INPUT] > the [CHANNEL] screen
You can choose between the manual and auto-ranging. When multiple channels are combined in
any mode other than 1P2W mode, all combined channels are forced to use the same range.
Display screen [INPUT] > [CHANNEL]
11
22
1
Tap the [U range] box of the wiring
conguration you wish to set and
select [Manual] or [Auto].
When [Auto] is selected, the voltage range will
be selected automatically.
2
When [Manual] is selected, set the
voltage range.
Set the current range in the same way.
Automatic range switching conditions
When ∆–Y conversion is enabled, the range switching is determined by multiplying the range by
1/
3
(multiplying by approximately 0.57735).
See “
Δ
–Y conversion” (p. 111).
Switching range
above
When one wiring conguration meets one of the following conditions, the range is
switched over to a one immediately above.
• A peak-over condition occurs.
• Either pk+ or pk− value is greater than 280% of range.
• RMS value is greater than 105% of range.
Switching range
below
If all channels in the wiring conguration meet all of the following conditions, the range
is switched over to a one immediately below.
• RMS value is 40% of range or less.
• No peak-over condition occurs with the range immediately below.
When the range does not switch immediately
Make sure that the inputs are synchronized, and then set the [Lower f lim] in the [CHANNEL]
screen to 1 Hz or higher. Synchronization of the inputs can be conrmed if the synchronization-
unlocked indicator is not lit up in yellow.
When the range switches frequently
It is recommended to select a range manually.
See “Voltage range and current range” (p. 54).
HIOKI PW8001A961-00