Accuracy; Stability - Measurement Computing USB-2404-UI User Manual

USB-2404-UI User's Guide
Current
4-wire and 2-wire resistance
Thermocouple
4-wire and 3-wire RTD
Quarter-bridge
Half-bridge
Full-bridge

Accuracy

Mode, range
Voltage, ±60 V
Voltage, ±15 V
Voltage, ±4 V
Voltage, ±1 V
Voltage/Thermocouple, ±125 mV
Current, ±25 mA
4-wire and 2-wire (note 1) resistance,
10 kΩ
4-wire and 2-wire (note 1) resistance,
1 kΩ
4-wire and 3-wire RTD, Pt 1000
4-wire and 3-wire RTD, Pt 100
Quarter-bridge, 350 Ω
Quarter-bridge, 120 Ω
Half-bridge, ±500 mV/V
Full-bridge, ±62.5 mV/V
Full-bridge, ±7.8 mV/V
Cold-junction compensation sensor
accuracy
2-wire resistance mode accuracy depends on the lead wire resistance. This table assumes 0 Ω of lead
Note 1:
wire resistance.

Stability

Measurement conditions
Voltage, ±60 V
Voltage, ±15 V
Voltage, ±4 V
Voltage, ±1 V
Voltage/thermocouple, ±125 mV
Current, ±25 mA
4-wire and 2-wire resistance, 10 kΩ
4-wire and 2-wire resistance, 1 kΩ
4-wire and 3-wire RTD, Pt 1000
4-wire and 3-wire RTD, Pt 100
Quarter-bridge, 350 Ω
Quarter-bridge, 120 Ω
Half-bridge, ±500 mV/V
Distributed by MicroDAQ.com, Ltd.
±25 mA
10 kΩ, 1 kΩ
±125 mV
Pt 1000, Pt 100
350 Ω, 120 Ω
±500 mV/V
±62.5 mV/V, ±7.8 mV/V
Table 3. Accuracy specifications
Gain error (percent of reading)
Typical 25 ºC, ±5 ºC, –40 to 70 ºC maximum
±0.3, ±0.4
±0.3, ±0.4
±0.3, ±0.4
±0.1, ±0.18
±0.1, ±0.18
±0.1, ±0.6
±0.1, ±0.5
±0.1, ±0.5
±0.1, ±0.5
±0.1, ±0.5
±0.1, ±0.5
±0.1, ±0.5
±0.03, ±0.07
±0.03, ±0.08
±0.03, ±0.08
Table 4. Stability specifications
Gain drift (ppm of reading/ ºC)
±20
±20
±20
±10
±10
±15
±15
±15
±15
±15
±15
±15
±3
17
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Specifications
±25 mA
10.5 kΩ, 1.05 kΩ
±125 mV
5.05 kΩ, 505 Ω
390 Ω, 150 Ω
±500 mV/V
±62.5 mV/V, ±7.8125 mV/V
Offset error (ppm of range)
±20, ±50
±60, ±180
±240, ±720
±15, ±45
±120, ±360
±30, ±100
±120, ±320
±1200, ±3200
±240, ±640
±2400, ±6400
±2400, ±6400
±2400, ±6400
±300, ±450
±300, ±1000
±2200, ±8000
±1 ºC, typical
Offset drift (ppm of range/ ºC)
±0.2
±0.8
±3.2
±0.2
±1.6
±0.4
±3
±30
±6
±60
±120
±240
±20
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