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USB-TEMP and USB-TC Series

USB-TEMP-AI and USB-TC-AI

All specifications are subject to change without notice.

Typical for 25 °C unless otherwise specified.

Thermocouple specifications apply to the USB-TEMP-AI and USB-TC-AI.

RTD, thermistor, and semiconductor specifications apply only to the USB-TEMP-AI

All other specifications apply to all temperature and voltage input channels unless

otherwise specified.

Analog Input

A/D converter type: T0x-T3x, V0x-V3x, AD42_321, dual 24-bit Sigma-Delta

Number of channels

Voltage input: 4 differential, V0x-V3x, 4 single-ended

Temperature Input: 4 differential, T0x-T3x

Input isolation: 500 VDC min between field wiring and USB interface

Channel configuration

T0x-T3x: Temperature input, software programmable to match sensor type

V0x-V3x: Voltage input

Analog input modes

Power up and reset state: Factory default configuration is Disabled mode; once

configured, each channel reverts to the mode previously set by the user

Single-ended: Vx_H are connected directly to screw terminal pins; Vx_L are discon-

nected from screw terminal pins and internally connected to GND

Differential: Vx_H and Vx_L are connected directly to screw terminal pins; Tx_H

and Tx_L are connected directly to their screw terminal pins

Input ranges

Thermocouple: T0x-T3x, ±0.080 V

RTD: T0x-T3x, 0 to 0.5 V

Thermistor: T0x-T3x, 0 to 2 V

Semiconductor: T0x-T3x, 0 to 2.5 V

Voltage: V0x-V3x, ±10, ±5, ±2.5, ±1.25 V

Absolute maximum input voltage

T0x-T3x relative to GND: ±25 V max power on, ±40 V max power off

V0x-V3x relative to GND: ±25 V max power on, ±15 V max power off

Input impedance

T0x-T3x: 5 GΩ power on, 1 MΩ power off

V0x-V3x: 10 GΩ power on, 2.49 kΩ power off

Input leakage current

T0x-T3x: With open thermocouple detect disabled, 30 nA max

T0x-T3x: With open thermocouple detect enabled, 105 nA max

V0x-V3x: ±1.5 nA typ, ±25 nA max

Input bandwidth (–3 dB)

T0x-T3x: 50 Hz

V0x-V3x: 3 kHz

Maximum working voltage (signal + common mode): V0x-V3x: ±10.25 V max

Common mode rejection ratio

T0x-T3x: fIN = 60 Hz, 100 dB

V0x-V3x: fIN = 60 Hz, all input ranges, 83 dB

ADC resolution: 24 bits

ADC no missing codes: 24 bits

Input coupling: DC

Warm-up time: 30 minutes min

Open thermocouple detect

T0x-T3x: Automatically enabled when the channel pair is configured for ther-

mocouple sensor; the maximum open detection time is 3 seconds

CJC sensor accuracy

T0x-T3x: 15 °C to 35 °C: ±0.25 °C typ, ±0.5 °C max

T0x-T3x: 0 °C to 70 °C: –1.0 °C to 0.75 °C max

Channel Configurations

T0x-T3x: Disabled, all temperature input channels are disconnected from screw

terminals and internally connected to GND

T0x-T3x: Thermocouple, 4 differential channels

T0x-T3x: Semiconductor sensor, 4 differential channels

T0x-T3x

RTD and thermistor

2-wire with a single sensor per channel pair, 2 differential channels

2-wire with two sensors per channel pair, 4 differential channels

3-wire with a single sensor per channel pair, 2 differential channels

4-wire with a single sensor per channel pair, 2 differential channels

4-wire with two sensors per channel pair, 4 differential channels

V0x-V3x: Disabled, all voltage input channels are disconnected from screw ter-

minals and internally connected to GND

V0x-V3x: Differential, 4 differential channels

V0x-V3x: Single-ended, 4 single-ended channels

Thermocouple:

J: –210 °C to 1200 °C

K: –270 °C to 1372 °C

R: –50 °C to 1768 °C

S: –50 °C to 1768 °C

T: –570 °C to 400 °C

N: –570 °C to 1300 °C

E: –570 °C to 1000 °C

B: 0 °C to 1820 °C

RTD

100 Ω PT (DIN 43760: 0.00385 ohms/ohm/°C)

100 Ω PT (SAMA: 0.003911 ohms/ohm/°C)

100 Ω PT (ITS-90/IEC751:0.0038505 ohms/ohm/°C)

Thermistor: Standard 2,252 Ω through 30,000 Ω

Semiconductor/IC: LM35, TMP35 or equivalent

Accuracy

Thermocouple Measurement Accuracy: T0x-T3x

Sensor

Type

Sensor

Temp.

Range

Accuracy

Error Max

(°C)

Accuracy

Error Typ

(°C)

Temp

(°C/ °C)

J

–210

2.028

0.707

0.031

0

0.835

0.278

1200

0.783

0.288

K

–210

2.137

0.762

0.035

0

0.842

0.280

1372

0.931

0.389

S

–50

1.225

0.435

0.021

250

0.554

0.195

1768

0.480

0.157

R

–50

1.301

0.458

0.019

250

0.549

0.190

1768

0.400

0.134

B

250

2.193

2.185

0.001

700

0.822

0.819

1820

0.469

0.468

E

–200

1.976

0.684

0.030

0

0.954

0.321

1000

0.653

0.240

T

–200

2.082

0.744

0.035

0

0.870

0.290

400

0.568

0.208

N

–200

2.197

0.760

0.028

0

0.848

0.283

1300

0.653

0.245

Includes CJC measurement accuracy. All specifications are (±).

Semiconductor Sensor Measurement Accuracy: T0x-T3x

Sensor

Type

Temperature

Range (°C)

Accuracy Error

Maximum (°C)

LM35, TMP35 or

equivalent

–40 to 150

±0.50

Specifications