Table of Contents
Advertisement
User Manual
4.5 Measurements
Standard measurement
measurements are spread across multiple screens
screens can be done by successively pressing the MEAS button on the front panel. This will cause
screen to cycle through all available measurement screens.
4.5.1 Basic
Measurements
The following three measurement screens are available:
Parameter
VOLTAGE
CURRENT
FREQUENCY
POWER
VA POWER
VAR POWER
POWER FACT
CREST FACT
VOLT THD
CURR THD
PEAK CURR
PHASE
Note: The V and I distort
component (H1) in the de
"MEAS:THD:MODE FUND" command over the USB or GPIB interface. See i/iX Series Compact
programming manual (CI P/N 6005-961) for details.
Mea
sureme
nts
for
display, th
e p
requested scree
scre
en im
media
inva
lid or b
lank
Not
e that in
AC
4.5.2 Accuracy Conside
Any measurement system has a finite accuracy specification. Measurement specifications are listed i
Section 2. When using the AC source for measurement purposes, always consider these
specifications when interpreting results. Measurement inaccuracies become more pronounced as th
signal being measured is at the low end of the measurement range. This is particularly relevant for low
current measurements. The iX Series is optimized for providing and measuring load currents up to 15
Arms. When powering very low power loads, measurement inaccuracies on rms and peak current
measurements will greatly affect derived measurements such as power, power factor and crest factor.
The measurement system on the i/iX Series uses a digital data acquisition system with a 96 KS/s
sampling rate and 48 KHz bandwidth. This means that higher frequency components of the measured
signal are filtered out. Any contribution to the rms value of voltage and current above this cutoff
California Instruments
s are always available through the MEAS key on the front panel. These
MEASUREMENTS 1
MEASUREMENTS 2
MEASUREMENTS 3
ion calculations are based on H2 through H50 with the fundamental
nominator. A RMS referenced calculation may be selected by sending the
are always running in the background. When the user selects a m
ower source first updates all the measurement parameters before displaying the
n. Consequently, pressing the M
tely. There will be a perceptible delay. This will prevent the screen from appearing with
readouts.
mode, all measurements are AC coupled only so any D
rations
to enhance readability. Switching between these
AC rms voltage
AC rms current
Frequency
Real power
Apparent power
Peak current
Power factor
Crest factor
Voltage distortion
Current distortion
Instantaneous current found
Phase angle (relative to phase A)
EAS key may not always bring up the selected
2253i / 2253iX
easurement screen
C offset will not be reported.
the
n
e
83
Advertisement
Table of Contents
