Chapter 4 Setting Measurement Conditions And Measurement Range; Selecting The Measurement Mode - YOKOGAWA WT200 User Manual

Chapter 4 Setting Measurement Conditions and Measurement Range

4.1

Selecting the Measurement Mode

Keys
Procedure
SHIFT
RMS
Explanation
IM 253421-01E
A
SAMPLE
V OVER
A OVER
MODE B
RMS
V MEAN
DC
C
SCALING AVG FILTER STORE
V RANGE
MODE
V MEAN
Measurement Mode
One of the following measurement modes can be selected for measurement of voltage
and current. The initial value is "RMS".
Indicator Voltage
RMS Measures and displays true
RMS value
V MEAN Displays rectified mean value
calibrated to the RMS value
DC Displays DC value obtained by
averaging the input signal
Theoretical Equations
• RMS
This mode is selected to display input voltage or current as a true RMS value.
T
1
2
f (t) dt
T
0
• V MEAN
This mode is selected to display input voltage or current as a rectified mean value
calibrated to the RMS value. Since a sine wave is used for calibration, the value
displayed will be the same as that obtained in RMS mode if a sine wave is
measured. The value displayed will be different from that obtained in RMS mode if
a distorted or DC waveform is measured.
T
π
1
1
• f (t) dt
T
2 2
• DC
This mode is selected when the input voltage or current is DC. The input signal is
averaged and the result is displayed.
m V VA
FUNCTION AUTO
k A var
V RANGE
M W
TIME
MODE
m V PF
FUNCTION
k A
deg
M W
m V Hz
START
FUNCTION
k A h
HARMONICS
M W h
REMOTE
LOCAL
RECALL HARMONICS
INTERFACE
V RANGE
SHIFT MODE
Current
Measures and displays true RMS
value
Measures and displays
true RMS value
Displays DC value obtained by averaging the input
signal
f (t): input signal
T: one period of the input signal
f (t): input signal
T: one period of the input signal
Displays
relevant
AUTO
A RANGE HOLD keys and
MAX HOLD TRIG
indicator
ENTER
CAL
INTEGRATOR
STOP RESET
MEMORY INTEG SET
SETUP
OUTPUT SHIFT
V RANGE
SHIFT MODE
DC
4
4-1