These equations show that smaller notch frequencies increase measurement time. At the same
time, larger notch frequencies result in lower measurement resolution. Consider this trade-off
when designing your system.
Table 10-1: Multiplexed analog voltage measurement speed
1,2,3
Without input
or excitation
reversal
Measurement
time (µs)
Sample rate (Hz)
With input or
excitation
reversal
Measurement
time (µs)
Sample rate (Hz)
With input
and excitation
reversal
Measurement
time (µs)
Sample Rate (Hz)
Burst
measurement
Measurement
Time (µs)
Sample Rate (Hz)
1
If the instruction uses excitation, calculate the measurement time separately and add 46 µs for each excitation
terminal used. Refer to Example 3 in
Calculating network restrictions
2
Refers to multiplexing circuitry internal to the VOLT 100 series series.
3
Default settling time, Tsettle, is 500 µs, minimum 100 µs.
NOTE:
The VOLT 100 series auto-calibrates to compensate for changes caused by changing
temperature and aging. This calibration occurs during downtime for the measurement
hardware. A time-consuming program may prevent background calibration if there is
insufficient downtime.
VOLT 100 series
34