Measurement-computing WEB-TEMP Manual do Utilizador descarregar pdf (Página 37)

WEB-TEMP User's Guide Specifications

LED displays and the factory reset button

Table 20. LED and button configurations

Parameter

Specification

POWER/COMM LED (top)

4.75 V < V

ext

< 5.25 V On

ext

< 4.75 V

ext

> 5.25 V Off (power fault)

Blinks during microcontroller communications.

LINK/ACTTIVITY LED (bottom)

On when a valid Ethernet connection is established.

Blinks when an Ethernet packet is sent or received.

Factory reset button

Press for 3 seconds to restore the factory default network settings.

When pressed for 3 seconds, the POWER LED turns off for a short time,

indicating that a reset is in process. When the POWER LED turns back on, the

reset is complete and the factory default network settings are restored.

Current excitation outputs (Ix+)

Table 21. Current excitation output specifications

Parameter

Specification

Configuration

4 dedicated pairs:

±IA: CH0/CH1

±IB: CH2/CH3

±IC: CH4/CH5

±ID: CH6/CH7

Current excitation output ranges

Thermistor: 10 µA typ

RTD: 210 µA typ

Tolerance

±5% typ

Drift

200 ppm/°C

Line regulation

2.1 ppm/V max

Load regulation

0.3 ppm/V typ

Output compliance voltage

(relative to AGND pins)

3.90 V max

–0.03 V min

Note 18: The WEB-TEMP has four current excitation outputs, with ±IA dedicated to the CH0/CH1 analog

inputs, ±IB dedicated to CH2/CH3, ±IC dedicated to CH4/CH5, and ±ID dedicated to CH6/CH7. The

excitation output currents should always be used in this dedicated configuration.

Note 19: The current excitation outputs are automatically configured based on the sensor selected

(thermistor or RTD).

Environmental

Table 22. Environmental specifications

Parameter

Specification

Operating temperature range

0 to 55 ° C

Storage temperature range

–40 to 85 ° C

Humidity

0 to 90% non-condensing

Mechanical

Table 23. Mechanical specifications

Parameter

Specification

Dimensions (L × W × H)

128.52 x 88.39 × 35.56 mm (5.06 × 3.48 × 1.43 ft)

1 2 ... 32 33 34 35 36 37 38 39 40

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