290

True RMS AC Measurements

True RMS responding multimeters, like the HP 34401A, measure the “heating” potential of an appliód voltage. Unlike an “average responding” measurement, a true RMS measurement is used to determine the power dissipated in a resistor. The power is proportional to the sąuare of the measured true RMS voltage, independent of waveshape. An average responding ac multimeter is calibrated to read the same as a true RMS meter for sinewaoe inpułs only. For other waveform shapes, an average responding meter will exhibit substantial errors as shown below.

Woveform Shape	Cresł Facłor (C.F.)	AC RMS	AC+DC RMS	Average Responding Error
	1 414	V	V	Calibrated for 0 error
		1.414	1.414
	1.732	V	V	-3.9%
		1.732	1 732

The multimeteFs ac voltage and ac current functions measure the ac-coupled true RMS value. This is in contrast to the ac+dc true RMS value shown above. Only the “heating value” of the ac components of the input wayeform are measured (dc is rejected). For sinewaves. trian?le waves, and sąuare waves, the ac and ac+dc values are eąual sińce these waveforms do not contain a dc offset. Non-symmetrical waveforms, such as pulse trains, contain dc voltages which are rejected by ac-coupled true RMS measurements.

Wyszukiwarka

Podobne podstrony:
The Directors are responsible for: •    preparing the Financial Report that gives a t
IB 6 A true strangle hołd is when the arm is inserted under the chin.3. Strangle Holds - Sleepe
©30dtl>‘ 1 Stconrfitionaf sentences express true o r ver y probabie situation in the present
them, and that practice has deviated from beautifully conceived ideas. It is not true that it is onl
discreterms dialog 0 Błock Parameters: Discrete RMS Value-U-*! Discrete RMS Value (mask) Computes th
stronaW (3) r ■ y 3 Make two true sentences about each building. The Hoover Building was a factory.
c114c00804611866cbeb30e821a1811d Rules to New Girl’s True American Gamę prep: Arrange the cans of be
the resulting disc by widening thc fre-qucncy response and increasing the dynamie rangę. The difficu
Download Manuał de Seguridad e Higiene Industrial PDF eBooks Free remedy is responsible for curing t
Sandland?4 p212 rM ALSO RESPON-SIBLE FOR THE THEFT OF TNF WATER. YOU
Synergy as a lalue Generator in Tourism 15 Almost a half of the respondents pointed to the lack of s
GSM ArchitectureBase Transceiver Station (BTS) The BTS is the network element responsible for mainta
10262188h9049521141366 83049578202459265 n ) fhc Sioux introduced into tłu* Indian cultuic8 > c)
76175 Sandland?4 p212 rM ALSO RESPON-SIBLE FOR THE THEFT OF TNF WATER. YOU
VSV treatment induces a functional antitumor CTL response. To evaluate the local and systemie T celi
Classroom English(1) AC ROSSDown A) Comptete thepiaure cro&uwrtf. 8} Pul the vtnr<!x tn ihc r

więcej podobnych podstron