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USB-TEMP and USB-TC Series

Specifications

USB-TEMP-AI/TC-AI Specifications, continued

Analog Input Calibration

Recommended Warm-Up Time: 30 minutes min

Calibration: Firmware calibration

Calibration interval: 1 year

Calibration reference: 10.000 V, ±5 mV max; measured values stored in EEPROM

Tempco: 5 ppm/°C max

Long term stability: 30 ppm/1000 h

Throughput Rate

Maximum throughput: 2 Samples/second per channel

Digital Input/Output

Digital type: 5 V CMOS

Number of I/O: 8 (DIO0 through DIO7)

Configuration: Independently input or output; power on reset is input mode

Pull-up/down configuration: All pins pulled up to 5 V through 47 kΩ resistors

(default); contact MCC for pull down to ground capability

Digital I/O transfer rate (software paced)

Digital input: 50 port reads or single bit reads per second, typ.

Digital output: 100 port writes or single bit writes per second, typ

Input high voltage: 2.0 V min, 5.5 V absolute max

Input low voltage: 0.8 V max, –0.5 V absolute min

Output low voltage (IOL = 2.5 mA max): 0.7 V max

Output high voltage (IOH = –2.5 mA max): 3.8 V min

Temperature Alarms

Number of alarms: 8 (one per digital I/O line)

Alarm functionality: Each alarm controls a DIO line as an alarm output. The

alarm input can be set to any temperature input channels. When enabled, the

associated DIO line is set to output after the device is reset, and driven to the

state determined by the alarm options and input temperature.

Alarm input modes: T1 and T2 may be independently set for each alarm.

Alarm when input temperature > T1

Alarm when input temperature > T1, reset alarm when input temperature goes

below T2

Alarm when input temperature < T1

Alarm when input temperature < T1, reset alarm when > T2

Alarm when input temperature is < T1 or > T2

Alarm output modes: Disabled, enabled/active high output, and enabled/active

low output

Alarm update rate: 1 second

Counter

Number of channels: 1

Resolution: 32-bits

Counter type: Event counter

Input type: TTL, rising edge triggered

Input source: CTR screw terminal

Counter read/writes rates (Software Paced): 33 to 1000 reads per second

Schmidt trigger hysteresis: 20 mV to 100 mV

Input leakage current: ±1.0 µA typ

Input frequency: 1 MHz max

High pulse width: 500 ns min

Low pulse width: 500 ns min

Input high voltage: 4.0 V min, 5.5 V absolute max

Input low voltage: 1.0 V max, –0.5 V absolute min

Power

Supply current: USB enumeration, <100 mA

Supply current: Quiescent mode with all inputs configured for Disabled mode,

270 mA typ

User 5 V input voltage range: 4.75 V min to 5.25 V max

User 5 V output voltage range: 4.9 V min to 5.1 V max

User 5 V output current: connected to a self-powered hub, 5 mA max

Isolation: Measurement system to PC, 500 VDC min

Current Excitation Outputs (±Ix, T0x-T3x)

Configuration: 2 dedicated pairs

Current excitation output ranges: Thermistor 10 µA; RTD: 210 µA

Tolerance: ±5.0%

Drift: 200 ppm/°C

Line regulation: 2.1 ppm/V max

Load regulation: 0.3 ppm/V

Output compliance voltage: 3.90 V max, –0.03 V min, (relative to GND)

Environmental

Operating temperature range: 0 °C to 55 °C max

Storage temperature range: –40 °C to 85 °C max

Humidity: 0 to 90% non-condensing max

Mechanical

Dimensions (L × W × H): 128.52 × 88.39 × 35.56 mm (5.06 × 3.48 × 1.43 in.)

User connection length: 3 m (9.84 ft) max

USB-TEMP and USB-TC

All specifications are subject to change without notice.

Thermocouple specifications apply to both USB-TEMP and USB-TC.

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

Typical for 25 °C unless otherwise specified.

Analog Input

A/D converters: Four dual 24-bit, Sigma-Delta type

Number of channels: 8 differential

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

Channel configuration: Software programmable to match sensor type

Differential input voltage range

Thermocouple: ±0.080 V

RTD: 0 to 0.5 V

Thermistor: 0 to 2 V

Semiconductor sensor: 0 to 2.5 V

Absolute maximum input voltage: ±25 V power on, ±40 V power off

Input impedance: 5 GΩ, min

Input leakage current: OTD disabled, 30 nA max; OTD enabled, 105 nA max

Normal mode rejection ratio: fIN = 60 Hz, 90 dB min

Common mode rejection ratio: fIN = 50 Hz/60 Hz, 100 dB min

Resolution: 24 bits

No missing codes: 24 bits

Input coupling: DC

Warm-up time: 30 minutes min

Open thermocouple detect: Automatically enabled; 3 seconds

CJC sensor accuracy: 15 °C to 35 °C, ±0.25 °C typ., ±0.5 °C max,

0 °C to 70 °C, –1.0 to 0.5 °C max

Channel Configurations

Thermocouple: 8 differential channels

Semiconductor sensor: 8 differential channels

RTD and thermistor

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

2-wire with two sensors per channel pair, 8 differential channels

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

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

4-wire with two sensors per channel pair, 8 differential channels

Compatible Sensors

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

Throughput Rate

Maximum throughput: 2 S/s per channel