ZES ZIMMER LMG450, Руководство пользователя

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Z E S ZIMMER Electronic Systems GmbH Chapter 15
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15 Glossary
Catchword Meaning
100 Harmonics Mode in which 99 harmonics of U, I and P are calculated.
A
AAF
⇒
Anti Aliasing Filter.
AC Alternating current; instantaneous values of voltage and
current are time depending signals which have positive and
negative values.
AC coupling Used to remove the DC parts of a signal by using a high pass
filter.
AC+DC coupling Couples the complete signal without rejecting any parts.
Accuracy Declaration of the errors which will be made in measuring.
Active energy Energy which is consumpted by the (usually ohmic) load.
Active power Power which is consumpted in the (usually ohmic) load.
Actual flicker level Pmom
⇒
Instantaneous flicker level.
Aliasing Distortion caused by signal parts, which are created through
the violation of the sampling (Nyquist, Shannon) theorem
(bandwidth
≥
½ sampling frequency). This can be prevented
by using
⇒
Anti Aliasing Filter.
Allowed limits Limits which are declared in standards.
AM Amplitude modulation; one signal is multiplied with another
one; A typical example is a rapid fire control, where a 50Hz
sine wave is modulated with a slower rectangular signal.
Amplitude error Error in the modulus of a measuring result.
Amplitude modulation
⇒
AM.
Analogue I/O Analogue input and output, the LMG series supplies four
separated inputs and outputs for analogue signals: 0-10V.
Analogue Input
⇒
Analogue I/O.
Analogue Output
⇒
Analogue I/O.
AND Condition Register Register in which a flag is set, if two conditions are true.
Anti-Aliasing-Filter Filter which cuts off signal parts which might produce
aliasing.
Apparent energy
Energy which seems to be consumpted by the load;
⇒
Apparent power. It is the integration of the apparent power.
Apparent power Power which seems to be consumpted; it is calculated by
U
TRMS
* I
TRMS
without taking care on the phase angle