SIGLENT SDM3045X - Loading Errors (AC Voltage)

SIGLENT
92 SDM3045X Digital Multimeter
Loading Errors (AC Voltage)
In the AC Voltage function, the input of SDM3045X appears as a 1MΩ
resistance in parallel with 100pF of capacitance. The test lead that you use to
connect signals to the Multimeter will also add additional capacitance and
loading. The approximate input resistances of the Multimeter at different
frequencies are listed in the following table.
Table 4- 2 Approximate Input Resistances at Different Frequencies
Input Frequency
Input Resistance
100Hz
1MΩ
1kHz
850kΩ
10kHz
160kΩ
100kHz
16kΩ
For low frequencies:
Error（%）= ×100%
For high frequencies:
Error（%）=[ -1] ×100%
F: input frequency
R
s
: source resistance
C
m
: input capacitance (100pF) plus test lead capacitance