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| STD2000:
Multi-functional calibrator & 5 ranges &
high accuracy |
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| General Information |
- Desired value setting is possible by choosing
a number for each digit.
- Five ranges can be switched respectively for
each function of DC current, DC voltage, AC
voltage, and AC current. The resistance is comprised
of two types of terminals: a common terminal
for 0-200kO and 10O step, and a terminal dedicated
for switching of 6 ranges between 190O and 19MO.
- Achieves enhanced accuracy and precision
of reference voltage and resistor element, and
overcomes the problem of drifting of the operational
amplifier. Use of the standard voltage IC with
a constant-temperature bath for the reference
voltage, and wire wound resistor and metal film
resistor with low temperature coefficient for
the resistor element. An IC of the low-drift
type is used for the operational amplifier,
thereby achieving high accuracy of ±0.05%.
- Use of electronic soft-touch push button switches
except the power switch. Speedy value setting
and operation are possible. The relay of the
low thermal electromotive force type and semiconductor
switch are used for circuit switches to enhance
heat resistance and durability.
- Overload protection in case of low voltage
and current is performed on the semiconductor
circuit, and overload protection in case of
medium and high voltage is achieved by releasing
the output terminal and output voltage circuit
to assure safety. When overload current runs
in the voltage range of 20V or more, the LED
for DC and AC resetting lights up to give warning.
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