Measurement Computing USB-2416 User Manual
Page 24
USB-2416 User's Guide
Specifications
24
When configuring thermocouple sensors, keep any stray capacitance relative to GND (pins 18, 36, 39, 42, 44,
46, 66, 81, 84) as small as possible to avoid settling time and accuracy errors.
The USB-2416 GND and DGND pins are isolated from earth ground. You can connect thermocouple sensors to
voltages referenced to earth ground as long as isolation between the GND/DGND pins and earth ground is
maintained.
Table 4. J type thermocouple accuracy specifications, including CJC measurement error.
All specifications are (±).
A/D data rate
Sensor temperature range
Accuracy error
maximum
Accuracy error
typical
Tempco
(°C/°C)
3750 S/s
-210 °C
2.572 °C
1.416 °C
0.022
0 °C
0.935 °C
0.469 °C
1200 °C
1.869 °C
1.456 °C
2000 S/s
-210 °C
2.572 °C
1.416 °C
0.022
0 °C
0.935 °C
0.469 °C
1200 °C
1.869 °C
1.456 °C
1000 S/s
-210 °C
2.572 °C
1.416 °C
0.022
0 °C
0.935 °C
0.469 °C
1200 °C
1.869 °C
1.456 °C
500 S/s
-210 °C
2.442 °C
1.334 °C
0.022
0 °C
0.881 °C
0.415 °C
1200 °C
1.821 °C
1.408 °C
100 S/s
-210 °C
2.442 °C
1.334 °C
0.022
0 °C
0.881 °C
0.415 °C
1200 °C
1.821 °C
1.408 °C
60 S/s
-210 °C
2.442 °C
1.334 °C
0.022
0 °C
0.881 °C
0.415 °C
1200 °C
1.821 °C
1.408 °C
50 S/s
-210 °C
2.442 °C
1.334 °C
0.022
0 °C
0.881 °C
0.415 °C
1200 °C
1.821 °C
1.408 °C
25 S/s
-210 °C
2.442 °C
1.334 °C
0.022
0 °C
0.881 °C
0.415 °C
1200 °C
1.821 °C
1.408 °C
10 S/s
-210 °C
2.442 °C
1.334 °C
0.022
0 °C
0.881 °C
0.415 °C
1200 °C
1.821 °C
1.408 °C
5 S/s
-210 °C
2.442 °C
1.334 °C
0.022
0 °C
0.881 °C
0.415 °C
1200 °C
1.821 °C
1.408 °C
2.5 S/s
-210 °C
2.442 °C
1.334 °C
0.022
0 °C
0.881 °C
0.415 °C
1200 °C
1.821 °C
1.408 °C
To achieve the thermocouple accuracies listed above, the USB-2416 should be warmed up for 45 minutes after
the initial power on. The accuracies listed above are only guaranteed if the USB-2416 is housed in its plastic
enclosure.