Hioki MR8740-50, Инструкция по эксплуатации

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75
Configuring Generator-Module-Specific Settings
Specifying a voltage value
The instrument outputs a DC current.
−5 mA to +5 mA
The output voltage range is from −0.1 V to +5.3 V.
The instrument switches generation ranges to an appropriate range based on the specified current
value.
−5 mA
to
−1 mA
,
1 mA
to
5 mA
5 mA range
−1 mA to −250 µA , 250 µA to 1 mA 1 mA range
−250 µA to −50 µA , 50 µA to 250 mA 250 µA range
−50 µA to 50 µA 50 µA range
Generating resistance
Resistance generation method
The instrument uses an electric circuit to generate resistance on a simulated manner.
The instrument generates a current I
out
= V
meas
/ R
set
based on the voltage outputted from the
OUTPUT terminal
V
meas
and a specified resistance value
R
set
.
10
Ω
to 1 M
Ω
IMPORTANT
The instrument cannot generate a set resistance value under any one of the following conditions:
• If the instrument is connected to a measuring instrument that outputs a constant current to
measure the resistance of a measuring object based on the voltage across both ends of the
object
(Example: workbench-type digital multi-meter)
• If the voltage of the OUTPUT terminal exceeds the range of 0 V to 5 V
• If the current outputted from the instrument exceeds the range of −5 mA to 5 mA
Optimizing a resistance generation response
Presuming the characteristic of a measuring object
The resistance generation function of the instrument can presume the characteristic of a measuring
object and optimize a resistance generation response based on the presumed result.
IMPORTANT
• When a connected target has an output resistance of less than 1 k
Ω
, a current that exceeds
the specification will flow, resulting in damage to the instrument and the connected object.
• A time required for presumption varies depending on the characteristic of a connected object. It
must take 1.6 seconds at a maximum.
• When you exchange connected objects, execute presumption of the connected object or
restore the presumption result of the connected object to the default.
Manually optimizing a resistance generation response
You can use the response coefficient command to regulate a response.
Lowering the response coefficient causes a slower response; however, it can prevent oscillations
and overshoots.
IMPORTANT
When you adjust a response coefficient manually, specify an appropriate response coefficient
while observing waveforms with another instrument such as an oscilloscope.
3
Advanced Functions