Measurement-computing USB-5203 Bedienungsanleitung PDF herunterladen (Seite 24)

USB-5203 User's Guide Specifications

Table 4. Thermocouple accuracy specifications, including CJC measurement error

Sensor Type Maximum error (°C) Typical error (°C) Temperature range (°C)

J ±1.499 ±0.507 –210 to 0

±0.643 ±0.312 0 to 1200

K ±1.761 ±0.538 –210 to 0

±0.691 ±0.345 0 to 1372

S ±2.491 ±0.648 –50 to 250

±1.841 ±0.399 250 to 1768.1

R ±2.653 ±0.650 –50 to 250

±1.070 ±0.358 250 to 1768.1

B ±1.779 ±0.581 250 to 700

±0.912 ±0.369 700 to 1820

E ±1.471 ±0.462 –200 to 0

±0.639 ±0.245 0 to 1000

T ±1.717 ±0.514 –200 to 0

±0.713 ±0.256 0 to 600

N ±1.969 ±0.502 –200 to 0

±0.769 ±0.272 0 to 1300

Semiconductor sensor measurement accuracy

The error shown in Table 5 below does not include errors of the sensor itself. These specs are for one year while

operation of the device is between 15 °C and 35 °C. Please contact your sensor supplier for details on the actual

sensor error limitations.

Table 5. Semiconductor sensor accuracy specifications

Sensor Type Temperature Range (°C) Maximum Accuracy Error (°C)

LM35, TMP35 or equivalent –40 to 150 ±0.50 (Note 2)

RTD measurement accuracy

The error shown in Table 6 below does not include errors of the sensor itself. The sensor linearization is

performed using a Callendar-Van Dusen linearization algorithm. These specs are for one year while operating

the device between 15 °C and 35 °C. The specification does not include lead resistance errors for 2-wire RTD

connections. Please contact your sensor supplier for details on the actual sensor error limitations.

In RTD mode, the device cannot measure resistance values greater than 660 Ω. The 660 Ω resistance limit

includes the total resistance across the current excitation (Ix+/Ix–) pins, which is the sum of the RTD resistance

and the lead resistances.

For accurate three-wire compensation, the individual lead resistances connected to the Ix+/Ix– pins must be of

equal value.

Table 6. RTD measurement accuracy specifications

RTD Sensor

Temperature (°C)

Maximum Accuracy Error (°C)

Ix+ = 210 µA

Typical Accuracy Error (°C)

Ix+ = 210 µA

PT100, DIN, US

or ITS-90

–200 to –150 ±2.85 ±2.59

–150 to –100 ±1.24 ±0.97

–100 to 0 ±0.58 ±0.31

0 to 100 ±0.38 ±0.11

100 to 300 ±0.39 ±0.12

300 to 600 ±0.40 ±0.12

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