5.4 Functional Specifications
155
Scaling (VT, CT)
Hold functions
Functions Applies user-defined VT and CT ratio settings to measured values.
VT ratio setting range OFF (1.0)
0.001 to 0.009, 0.010 to 0.099, 0.100 to 0.999, 1.000 to 9.999, 10.00 to 99.99,
100.0 to 999.9, 1000. (setting: 0)
CT ratio setting range OFF (1.0)
0.001 to 0.009, 0.010 to 0.099, 0.100 to 0.999, 1.000 to 9.999, 10.00 to 99.99,
100.0 to 999.9, 1000. (setting: 0)
Display The VT lamp will turn on when the VT ratio is set to any value other than 1 (off).
The CT lamp will turn on when the CT ratio is set to any value other than 1 (off).
Error warnings The display will show S.Err (scaling error) when the VT ratio or CT ratio setting causes
the full-scale value for active power, apparent power, or reactive power to exceed
99,999 M.
Default state VT ratio: 1.0 (OFF), CT ratio: 1.0 (OFF)
Hold (HOLD)
Functions • Stops display updates for all measured values and fixes the display values at that
point in time.
• Measurement data acquired by communications is also fixed at that point in time.
• Peak exceeded and other warning lamps will still light up.
• Internal calculations (including integration and integration elapsed time) will con-
tinue.
• Analog output and waveform output are not held.
Operation Pressing the HOLD key turns on the hold function (and causes the HOLD lamp to light
up). Pressing the HOLD key again turns off the hold function (causing the HOLD lamp
to turn off).
Default state Hold display: OFF
Backup The hold function is backed up.
(The hold value is not backed up, and display of the initial data is held when the instru-
ment starts up.)
Constraints During hold operation, the following operational constraints apply:
External control Input signal level 0 to 5 V (high-speed CMOS level) or shorted (low)/open (high)
: Setting and changes allowed −: Setting and changes not allowed
Item During hold operation
Measurement range
−
However, during auto-range integration, auto-range op-
eration is used to determine the current range.
Current input method switching
−
Frequency measurement range
(Zero-cross filter)
−
Timeout
−
Integration time
−
Synchronization source
−
Zero-adjustment
−
Maximum value/minimum value hold
Display parameters
D/A output parameters
Number of averaging iterations
−
VT ratio
−
CT ratio
−
RS-232C transfer speed
GP-IB address
LAN
Harmonic analysis order upper limit −
Functions External control signal External control terminal
Hold on Hi Lo
HOLD
Hold off (canceled) Lo Hi
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