BASIC
MEASUREMENT
25
Select Voltage range
Auto range
To turn the automatic range selection
On/Off, press the AUTO key.
Manual range
Press the Up or the Down key to select
the range. AUTO indicator turns Off
automatically. If the appropriate range
is unknown, select the highest range.
Resolution / Full scale @ slow rate
Selection list Range
Resolution Full
scale
(GDM-8251)
Full scale
(GDM-8255)
100mV
1µV 120.000mV
199.999mV
1V
10µV 1.20000V
1.99999V
10V
100µV 12.0000V 19.9999V
100V
1mV 120.000V
199.999V
750V
(AC)
10mV 750.0V 750.0V
1000V
(DC, AC+DC)
10mV 1000.0V 1000.0V
Note
For more detailed parameters, see the specification at
page109.
GDM-8200 Series User Manual
26
Voltage conversion table
This table shows the relationship between AC, DC, and AC+DC reading in
various waveforms.
Waveform
Peak to Peak
AC
(True RMS)
DC AC
+
DC
(True RMS)
Sine
PK-PK
2.828 1.000 0.000 1.000
Rectified Sine
(full wave)
PK-PK
1.414 0.435 0.900 1.000
Rectified Sine
(half wave)
PK-PK
2.000 0.771 0.636 1.000
Square
PK-PK
2.000 1.000 0.000 1.000
Rectified
Square
PK-PK
1.414 0.707 0.707 1.000
Rectangular
Pulse
PK-PK
X
Y
2.000 2K
K=
√
(
D-D
2
)
D=X/Y
2D
D=X/Y
2
√
D
D=X/Y
Triangle
Sawtooth
PK-PK
3.464 1.000 0.000 1.000
