Measurement Computing WEB-TEMP - Manual (Page 37)

WEB-TEMP User's Guide Specifications
37
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
V
ext
< 4.75 V
,
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)