Measurement Computing USB-2416 - Manual (Page 15)

USB-2416 User's Guide Functional Details
15
Figure 9 below shows a typical thermocouple connection.
Figure 9. Differential thermocouple connection example
Noise filtering, data rate, and throughput rate
Although the USB-2416 A/D converter has a maximum data rate of 3,750 S/s, the actual throughput rate you
observe for voltage and temperature data is determined by these formulas.
 Maximum single-channel throughput:
s
rate data
µ
640
1
1
+
 Maximum multiple-channel throughput:
∑




+
n
μs
640
rate data
1
1
where n is the number of channels
See Table 18 and Table 19 in the Specifications chapter for details.
This drop-off in throughput rate is due to the USB-2416's noise filtering feature. You can control the amount of
the noise filtering by adjusting the data rate setting. By reducing the data rate, the averaging of samples
increases, and noise drops correspondingly.