Fluke 8060A - High Impedance DC Voltage

8060A
Instruction Manual
2-14
AC Coupled Peak Voltages Display Readings DC and AC
Input AC Component Only DC Total rms
Waveform PK - PK 0 - PK
rms CAL* 8062A
Component
only
TRUE RMS =
ac + dc
22
Sine
PK
0
PK-PK
2.828 1.414 1.000 1.000 0.000 1.000
PK-PK
0
PK
Rectified Sine
(Full Wave)
1.414 1.414 0.421 0.435 0.900 1.000
PK-PK
Rectified Sine
(Half Wave)
0
PK
2.000 2.000 0.764 0.771 0.636 1.000
PK-PK
0
PK
Square
2.000 1.000 1.110 1.000 0.000 1.000
PK-PK
0
PK
Rectified
Square
1.414 1.414 0.785 0.707 0.707 1.000
PK-PK
Rectangular
Pulse
0
PK
X
Y
D = X/Y
K = D-D
2
2.000 2.000 2.22K 2K 2D 2
D
PK-PK
Triangle
Sawtooth
0
PK
3.464 1.732 0.960 1.000 0.000 1.000
rms CAL is the displayed value for average responding meters that are calibrated to display rms for sine waves.
Figure 2-8. Multiplication Factors for Converting Waveforms
Since average-responding meters have been in use for so long, you may have
accumulated test or reference data based on them. The conversion factors in
Figure 2-8 should help you convert between the two measurement methods.
2-15. High Impedance DC Voltage
Occasionally you may want to make dc voltage measurements in high
impedance circuitry where even the 10 MΩ input impedance for the normal
dc voltage function could load the circuit and cause significant errors. For
example, a 10 MΩ input impedance causes a 0.1% error when measuring the
voltage across the 10 kΩ leg of a 90 kΩ over 10 kΩ voltage divider. The
8060A offers a >1,000 MΩ (typically >10,000 MΩ) input impedance dc
voltage function which greatly reduces this error.