Hioki DSM-8104, Instruction Manual

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5.1.4 Setting current limiter
This meter limits a current to the work by a current limiter to expedite charging to the
work and to prevent fracture of the work.
The “CHARGE” terminal is provided to facilitate precharging in auto measurement. The
current to the “CHARGE” terminal is also limited by a current limiter.
These current limiters are set through “POWER SOURCE SELECT” on the setting screen
by the [SETUP] key.
“POWER SOURCE SELECT” also sets “CHARGE” output and the filtering function, in
addition to the current limiters.
[Caution]
The current limiter limits a steady-state current. A transient current several
ten
μ s in width flows when the sample is changed by a relay or other means.
When changing the measuring terminal by a relay or other means while
outputting measuring voltage, serially insert protective resistance not
exceeding the maximum permissible current of the contact to limit the current
flow in the contact for protection of the relay contact.
This procedure is also repeated when changing the “CHARGE” terminal for
precharging.
Protective resistance value ≧ (measuring voltage)/(maximum permissible current)
(1) Keying
(a) Press the [SETUP] key to set up the Setting screen.
(b) Press the [F4] POWR key to set up the “POWER SOURCE SELECT” screen.
(c) Move to “CURL :” operating the vertical cursor moving keys [
▲ ] and [ ▼ ] and
select a limit value operating the horizontal cursor moving keys [ ◄ ] and [ ► ].
(d) Move to “CURL C:” operating the vertical cursor moving keys [ ▲ ] and [ ▼ ]
and select (Use/Non-use) for the “CHARGE” terminal operating the
horizontal cursor moving keys [
◄ ] and [ ► ].
(2) Limit value setting range
The limit value setting range is limited as follows depending on the measuring
voltage:
Measuring voltage: 0.1 to 250V, 5mA/10mA/50mA
250V to 1000V, 5mA/10mA
(3) Selecting “CHARGE” terminal
Set “CURL C:” to ON and set “CURL :” to “10” or “50.” The “CHARGE” terminal
can then be used and a side mark “
◄ ” lights up near “CHARGE ON” on the
panel.
The limit currents of the current limiters on the measuring side (“INPUT” or
“GUARD”) and on the charge side (“CHARGE”) will be set as shown in Table
5.6.