Omicron CMC 430, Руководство пользователя

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3 Technical data
This chapter contains the complete specifications for the CMC 430 . These specifications characterize
the behavior of the device under different operating and environmental conditions. The values stated
in this chapter are
• absolute 1- and 2-year specifications,
• relative 24-hour specifications,
• or typical or guaranteed specifications valid over the entire lifetime of the CMC 430 .
Absolute 1- and 2-year specifications are absolute accuracy values met by at least 99 % of all
CMC 430 test sets even at the end of the specified time period after delivery of new devices or factory
calibration of used devices. → Calibration interval on page 43.
Relative 24-hour specifications exclusively define the short-term drift within 24 hours relative to an
initial value under otherwise stable operating conditions (temperature, humidity, and load).
Example: A 24-hour specification of 0.015 % + 0.05 % means that an output value of, for example,
50.01 V available at the beginning of a 24-hour period may drift by 15 mV within these 24 hours to an
output value of 50.025 V or 49.995 V.
This may be useful to compare test objects or to increase the accuracy by comparing the accuracy to
a more stable reference. One possible application for this could be to check the accuracy of the
CMC 430 against a more stable reference, and then calibrate it for up to 24 hours using the 24-hour
specification and the measured deviation.
Specifications marked to be typical values represent characteristic performance that will be met by
90 % of all CMC 430 test sets produced if the test sets are operated within the conditions given in
section 3.1 . Typical specifications are not tested and not warranted.
Specifications marked to be guaranteed represent guaranteed performance met by all CMC 430 test
sets if the test sets are operated within the conditions given in section 3.1 .
3.1 Specification conditions
Unless stated otherwise, the specifications given in this chapter are valid at the terminals of the
CMC 430 and under the following conditions:
• After a warmup period of 30 minutes
• At a temperature of 23 °C ± 5 °C
• At a relative humidity < 80 %
• If regular calibration is performed every 1 or 2 years, depending on the customer requirements
Technical data
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