Hioki ST5540, Instruction Manual, Page: 267 / 326

10.5 Other Functions
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10.5 Other Functions
Trigger system (a) Manual: automatic generation of internal trigger, and free-run measurement
(b) Automatic: measurement started by external start signal
Refresh rate (a) When set to 15 Hz
DC, AC, AC+DC 500 ms
ACpeak 600 ms
(b) When set to 0.1 Hz
DC, AC, AC+DC 5 s
Wiring check function (a) Polarity check (voltage monitor)
(b) VA check (voltage monitor x current monitor)
Voltage application
line selection function Selected from the following (a) or (b) for leakage current measurement between
enclosure and line and touch current (enclosure-line) measurement :
(a) Use of T2 and internal contact (default)
(b) Use of T1 and T2
Ground fault
prevention function Pre-check of current value between connection terminals to prevent a ground
fault
During touch current (enclosure-line) measurement, enclosure - line leakage cur-
rent measurement and polarity switching
Setting of single-fault
condition (a) Setting of fault mode for power line for equipment under test
(1) Disconnection of one wire in power line (neutral side)
(2) Disconnection of protective earth conductor
During use of the automatic measurement function, polarity switching and
(1) and (2) can be automatically switched.
(b) Application of 110% voltage for simulated connection of malfunctioning equip-
ment. (1)Positive phase (2)Negative phase
During use of the automatic measurement function, (1) and (2) can be
automatically switched
(c) Selection of application line for leakage current measurement between enclo-
sure and line and touch current (enclosure-line) measurement
(1) Application of voltage of L (live) side of line input
(2) Application of voltage of N (neutral) side of line input
During use of the automatic measurement function (1) and (2) can be
automatically switched
Power line for
equipment under test
(switching power
supply polarity) (a) Positive phase
(b) Negative phase
During use of the automatic measurement function (a) and (b) can be automati-
cally switched
Power on polarity
switching function* Available when instrument is combined with an isolation transformer
Setting of measuring
time Setting of measuring time for each item
Setting range : 1 sec. to 5 min., in 1 sec. increments
Effective only in automatic measurement
(when 0.1 Hz - 1 MHz is set ; equipped with pre-check function)*
Measurement delay
(setting) function (a) Setting of wait time from the completion of measurement to power supply dis-
connection (Default : 0sec)
(b1)Set the wait time until power is turned on after polarity switching.
(Default : 0 sec.)
(b2) After (b1), set wait time until start of measurement (Default :
0
sec)
(c) Setting of wait time for operations other than switching polarity
(Default : 1 sec.)
Setting range : 1 sec. to 30 min., in 1 sec. increments
(When selecting network B1, 0 sec. to 30 min.)
(when 0.1 Hz - 1 MHz is set ; equipped with pre-check function)*
*
only ST5540