Measurement-computing USB-2408 Series Instrukcja Użytkownika Pobierz pdf (Strona 23)

USB-2408 Series User's Guide Specifications

Table 4. Thermocouple accuracy specifications, including CJC measurement error.

All specifications are (±).

Thermocouple

Sensor temperature

range

Accuracy error,

maximum

Accuracy error,

typical

Tempco

(°C/°C)

–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

–210 °C

2.917 °C

1.699 °C

0.029

0 °C

1.017 °C

0.526 °C

1372 °C

2.478 °C

2.022 °C

–200 °C

3.480°C

2.030 °C

0.029

0 °C

1.201 °C

0.659 °C

1300 °C

1.991 °C

1.600 °C

–50 °C

4.826 °C

3.133 °C

0.082

250 °C

2.117 °C

1.424 °C

1768 °C

2.842 °C

2.347 °C

–50 °C

4.510 °C

2.930 °Co

.089

250 °C

2.165 °C

1.468 °C

1768 °C

3.187 °C

2.597 °C

250 °C

5.489 °C

3.956 °C

0.14

700 °C

2.283 °C

1.743 °C

1820 °C

2.202 °C

1.842 °C

–200 °C

2.413 °C

1.352 °C

0.017

0 °C

1.069 °C

0.551 °C

1000 °C

1.575 °C

1.211 °C

–200 °C

2.821 °C

1.676 °C

0.027

0 °C

1.050 °C

0.558 °C

400 °C

0.957 °C

0.595 °C

To achieve the thermocouple accuracies listed above, warm up the USB-2408 Series device for 45 minutes after

the initial power on. The accuracies listed above are only guaranteed if the device is housed in the plastic

enclosure.

Analog input DC voltage measurement accuracy

Table 5. DC Accuracy components and specifications. All values are (±)

Range

Gain error (%

of reading)

Offset

error

INL error (%

of range)

Absolute

accuracy

Gain temperature

coefficient

(% reading/°C)

Offset

temperature

coefficient

(µV/°C)

±10 V

0.0037

50 µV

0.0008

500 µV

0.0006

±5 V

0.0047

25 µV

0.0008

300 µV

0.0006

±2.5 V

0.0059

20 µV

0.0008

200 µV

0.0006

±1.25 V

0.0056

20 µV

0.0008

100 µV

0.0006

±0.625 V

0.0068

15 µV

0.0005

60 µV

0.0006

±0.3125 V

0.0104

15 µV

0.0006

50 µV

0.0006

±0.15625 V

0.0184

10 µV

0.0005

40 µV

0.0006

±0.078125 V

0.0384

10 µV

0.0009

40 µV

0.0006

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 33 34

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