Space Electronics

kleinste Änderung der Messgröße, die an der Anzeige noch feststellbar ist.

The smallest portion of the signal that can be observed.

kleinste Änderung des Messignals, die gemessen werden kann. Beachte: Die Empfindlichkeit kann geringer als die Auflösung des Messgerätes sein!

The smallest change in the signal that can be detected.

Die Genauigkeit ist definiert als Abweichung in Prozent (oder Anzahl der count) vom Messwert plus Abweichung in Prozent (oder Anzahl der count) vom Messbereichsendwert.

The closeness of agreement between the result of a measurement and its true value or  accepted standard value.

Absolute accuracy takes into account the uncertainty of the accepted standard (true) value. Relative accuracy doesn't.

Percentage of full scale, percentage of reading, or a combination of both. Terms used are mostly percentages and parts per million (PPM), but digits, bits decibels and portions of 10 V are used as well.

 A typical expression of accuracy is ±(gain error + offset error)

 a typical DMM accuracy specification may be stated as: ±(0.005% of reading + 0.002% of range).

a ppm  accuracy specification is given as ±(ppm of reading + ppm of range). 

The input impedance of a measurement device is the measure of the opposition to current (impedance), both static (resistance) and dynamic (reactance), into the load network that is external to the electrical source.

Common mode rejection ratio (CMRR) specifies how well an instrument rejects noise signals that appear between both input high and input low and chassis ground, CMRR is usually measured with a 1kW resistor imbalance in one of the input leads.

CMRR are generally specified in dB at 50 and 60Hz, which are the interference frequencies of greatest interest.

• Funktionsprinzip (ampereometrisch, ohmmetrisch, voltmetrsich...),
• Versorgungsspannung/Leistungsbedarf, 
• Sample Rate (obere Grenzfrequenz),
• sensorstrom.