NARDA IDA - Page 256

17 Specifications
248 IDA-3106 Narda
17.1 Definitions and conditions
Conditions
Unless otherwise noted, specifications apply after 30 minutes warm-up time
within the specified environmental conditions.
Specifications with limits
These describe product performance for the given parameter covered by
warranty. Specifications with limits (marked as <, , >, , ±, max., min.) apply
under the given conditions for the product and are tested during production
taking measurement uncertainty into account.
Specifications without limits
These describe product performance for the given parameter covered by
warranty. Specifications without limits represent values with negligible
deviations which are ensured by design (e.g. dimensions or resolution of a
setting parameter).
Typical values (typ.)
These characterize product performance for the given parameter that is not
covered by warranty. Typical values stated as a range or as a limit (marked
as <, , >, , ±, max., min.) represent the performance met by approximately
80 % of the instruments. Otherwise, the mean value is given. The
measurement uncertainty is not taken into account.
Nominal values (nom.)
These characterize expected product performance for the given parameter
that is not covered by warranty. Nominal values are verified during product
development but are not tested during production.
Uncertainties
These characterize an interval for a given measurand estimated to have a
level of confidence of approximately 95 percent. Uncertainty is stated as the
standard uncertainty multiplied by the coverage factor k = 2 based on the
normal distribution. The evaluation has been carried out in accordance with
the rules of the “Guide of the Expression of Uncertainty in Measurement”
(GUM).