Measurement Computing USB-2404-UI - Manual (Page 17)

USB-2404-UI User's Guide Specifications
17
Current ±25 mA ±25 mA
4-wire and 2-wire resistance 10 k
Ω, 1 kΩ
10.5 k
Ω, 1.05 kΩ
Thermocouple ±125 mV ±125 mV
4-wire and 3-wire RTD Pt 1000, Pt 100 5.05 k
Ω, 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 k
Ω
±0.1, ±0.5 ±120, ±320
4-wire and 2-wire (note 1) resistance,
1 k
Ω
±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 k
Ω
±15 ±3
4-wire and 2-wire resistance, 1 k
Ω
±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