OM-WEB Series User's Guide
4
RTD and thermistor connections (OM-WEB-TEMP) ...................................................................................... 19
Two-wire configuration ...................................................................................................................................................20
Three-wire configuration .................................................................................................................................................21
Four-wire configuration ...................................................................................................................................................21
Semiconductor sensor measurements (OM-WEB-TEMP) ............................................................................... 22
Wiring configuration ........................................................................................................................................................22
Digital I/O connections ..................................................................................................................................... 23
Configuring the DIO channels to generate alarms ...........................................................................................................23
Chapter 4
Functional Details ............................................................................................................................... 24
Thermocouple measurements ........................................................................................................................... 24
Cold junction compensation (CJC) ..................................................................................................................................24
Data linearization .............................................................................................................................................................24
Open-thermocouple detection (OTD) ..............................................................................................................................24
RTD and thermistor measurements (OM-WEB-TEMP only) .......................................................................... 24
Data linearization .............................................................................................................................................................25
External components ........................................................................................................................................ 25
Screw terminals................................................................................................................................................................25
Ethernet port ....................................................................................................................................................................25
External power connector ................................................................................................................................................25
Status LEDs .....................................................................................................................................................................26
Digital logic voltage switch .............................................................................................................................................26
Factory default reset button..............................................................................................................................................26
Chapter 5
Ethernet Troubleshooting .................................................................................................................. 27
Check the OM-WEB Series device status LEDs .............................................................................................. 27
Check the network settings on the computer .................................................................................................... 28
Check whether DHCP is enabled on the network server ..................................................................................................28
Verify that the computer is connected to the network ...................................................................................... 28
Verify the network path to the OM-WEB Series device .................................................................................. 29
Verify the network path to a remote OM-WEB Series device ......................................................................... 30
Check cached information ................................................................................................................................ 30
Deleting a NetBIOS table entry .......................................................................................................................................30
Deleting an ARP table .....................................................................................................................................................30
Getting help ...................................................................................................................................................... 30
Chapter 6
Specifications ...................................................................................................................................... 31
Analog input ..................................................................................................................................................... 31
Channel configurations ..................................................................................................................................... 32
Compatible sensors ........................................................................................................................................... 32
Accuracy ........................................................................................................................................................... 33
Thermocouple measurement accuracy .............................................................................................................................33
Semiconductor sensor measurement accuracy .................................................................................................................34
RTD measurement accuracy ............................................................................................................................................34
Thermistor measurement accuracy ..................................................................................................................................35
Throughput rate ................................................................................................................................................ 36
Digital input/output........................................................................................................................................... 36
Temperature alarms .......................................................................................................................................... 37
Memory ............................................................................................................................................................ 37
Microcontroller ................................................................................................................................................. 37
Power ................................................................................................................................................................ 37