Hioki 8807-01 - Page 315

291
_____________________________________________________________________
15.2 Analog Inputs
______________________________________________________________
Rs
Rin
Es
Es: Signal voltage
Rs: Signal source resistance
Rin: Input resistance
Rin
Rs+Rin
[
V
]
Measurement error=Es 1-
Measurement Errors Caused by Signal Source
Internal Resistance
If the signal source impedance is higher than the input
impedance of the analog input, a measurement error will
occur.
The input impedance is 1 MΩ. If the signal source
impedance is 1 kΩ, an error of about 1% will occur.