5.4 Functional Specifications
156
Maximum value/ minimum value hold (MAX/MIN HOLD)
Functions • Detects maximum and minimum measured values (except current integration, active
power integration, integration elapsed time, time average current, and time average
active power values) as well as maximum and minimum values for the voltage wave-
form peak and current waveform peak and holds them on the display.
• For data with polarity, display of the maximum value and minimum value for the
data’s absolute values is held (so that both positive and negative polarity values are
shown). However, this does not apply to the voltage waveform peak value or the cur-
rent waveform peak value.
• Peak exceeded and other warning lamps will still light up.
• Internal calculations (including integration and integration elapsed time) will con-
tinue.
• The maximum and minimum values during integration are detected (maximum/mini-
mum value measurement during the integration interval).
• Analog output and waveform output are not held.
Maximum value and mini-
mum value detection oper-
ation
1. After the instrument starts up, internal data is cleared, and detection operation
restarts. (However, if the instrument was restarted while integration was in prog-
ress, the display will indicate [- - - - -] [invalid data].)
2. Internal data is cleared and detection restarts when the DATA RESET key is
pressed (including via external control).
3. Internal data is cleared and detection restarts when integration is started.
4. Detection of maximum and minimum values stops when integration stops.
5. Operation does not resume when the range is changed.
6. If the VT ratio or CT ratio is changed, detection operation restarts.
Display switching Pressing the MAX/ MIN key cycles the display as follows: Maximum value minimum
value instantaneous value (causing the MAX and MIN lamp to light up as appropri-
ate).
Default state Maximum value/minimum value hold display: OFF
Backup The maximum value/ minimum value hold function is backed up. (Maximum and mini-
mum values are not backed up, and detection operation restarts when the instrument
starts up.)
Constraints During the maximum value and minimum value hold display, the following operational
constraints apply:
:Setting and changes allowed −: Setting and changes not allowed
Item During maximum value/ minimum value hold display
Measurement range
Current input method switching −
Frequency measurement range
(Zero-cross filter)
−
Timeout −
Integration time −
Synchronization source −
Zero Adjustment −
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
−
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