Measurement-computing USB-2404-UI Manuel d'utilisateur télécharger pdf (Page 17)

USB-2404-UI User's Guide Specifications

Current ±25 mA ±25 mA

4-wire and 2-wire resistance 10 kΩ, 1 kΩ 10.5 kΩ, 1.05 kΩ

Thermocouple ±125 mV ±125 mV

4-wire and 3-wire RTD Pt 1000, Pt 100 5.05 kΩ, 505 Ω

Quarter-bridge 350 Ω, 120 Ω 390 Ω, 150 Ω

Half-bridge ±500 mV/V ±500 mV/V

Full-bridge ±62.5 mV/V, ±7.8 mV/V ±62.5 mV/V, ±7.8125 mV/V

Accuracy

Table 3. Accuracy specifications

Mode, range

Gain error (percent of reading) Offset error (ppm of range)

Typical 25 ºC, ±5 ºC, –40 to 70 ºC maximum

Voltage, ±60 V ±0.3, ±0.4 ±20, ±50

Voltage, ±15 V ±0.3, ±0.4 ±60, ±180

Voltage, ±4 V ±0.3, ±0.4 ±240, ±720

Voltage, ±1 V ±0.1, ±0.18 ±15, ±45

Voltage/Thermocouple, ±125 mV ±0.1, ±0.18 ±120, ±360

Current, ±25 mA ±0.1, ±0.6 ±30, ±100

4-wire and 2-wire (note 1) resistance,

10 kΩ

±0.1, ±0.5 ±120, ±320

4-wire and 2-wire (note 1) resistance,

1 kΩ

±0.1, ±0.5 ±1200, ±3200

4-wire and 3-wire RTD, Pt 1000 ±0.1, ±0.5 ±240, ±640

4-wire and 3-wire RTD, Pt 100 ±0.1, ±0.5 ±2400, ±6400

Quarter-bridge, 350 Ω ±0.1, ±0.5 ±2400, ±6400

Quarter-bridge, 120 Ω ±0.1, ±0.5 ±2400, ±6400

Half-bridge, ±500 mV/V ±0.03, ±0.07 ±300, ±450

Full-bridge, ±62.5 mV/V ±0.03, ±0.08 ±300, ±1000

Full-bridge, ±7.8 mV/V ±0.03, ±0.08 ±2200, ±8000

Cold-junction compensation sensor

accuracy

±1 ºC, typical

Note 1: 2-wire resistance mode accuracy depends on the lead wire resistance. This table assumes 0 Ω of lead

wire resistance.

Stability

Table 4. Stability specifications

Measurement conditions Gain drift (ppm of reading/ ºC) Offset drift (ppm of range/ ºC)

Voltage, ±60 V ±20 ±0.2

Voltage, ±15 V ±20 ±0.8

Voltage, ±4 V ±20 ±3.2

Voltage, ±1 V ±10 ±0.2

Voltage/thermocouple, ±125 mV ±10 ±1.6

Current, ±25 mA ±15 ±0.4

4-wire and 2-wire resistance, 10 kΩ ±15 ±3

4-wire and 2-wire resistance, 1 kΩ ±15 ±30

4-wire and 3-wire RTD, Pt 1000 ±15 ±6

4-wire and 3-wire RTD, Pt 100 ±15 ±60

Quarter-bridge, 350 Ω ±15 ±120

Quarter-bridge, 120 Ω ±15 ±240

Half-bridge, ±500 mV/V ±3 ±20

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Measurement-computing USB-2404-UI Manuel d'utilisateur Page 17

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