Omega OMB-DAQ-2416_4AO Drums User Manual


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OMB-DAQ-2416-4AO User's Guide Specifications
27
Connect thermocouples to the OMB-DAQ-2416-4AO such that they are floating with respect to GND (pins 18,
36, 39, 42, 44, 46, 66, 81, 84, 93, and 94).
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 OMB-DAQ-2416-4AO 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 OMB-DAQ-2416-4AO should be warmed up for
45 minutes after the initial power on. The accuracies listed above are only guaranteed if the OMB-DAQ-2416-
4AO is housed in its plastic enclosure.
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