Справочник Пользователя для Siemens UM344-2

 

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4.1  Operating Mode and Network Type ...........................................................................................4-3 
4.2  Thermocouple and Extension Grade Wire Characteristics .......................................................... 4-32 
 
5.1  Output Display Code Choices................................................................................................... 5-12 
 
6.1  Self-Diagnostics Troubleshooting.............................................................................................. 6-16 
6.2  Message - No Transmitter Found ............................................................................................. 6-17 
6.3  Message - Communication Error .............................................................................................. 6-18 
6.4  Message - Field Device Malfunction......................................................................................... 6-19 
6.5  Symptom - Zero or Low Output ............................................................................................... 6-19 
6.6  Symptom - High Output ........................................................................................................... 6-20 
6.7  Symptom - Output Current Fixed Below Scale at Approximately 3.84 mA .................................. 6-21 
6.8  Symptom - Output Current Fixed Above Scale at Approximately 21.8 mA .................................. 6-11 
6.9  Symptom - Erratic Output ........................................................................................................ 6-11 
 
8.1  Model 344T Model Designation..................................................................................................8-1 
8.2  General Accessories..................................................................................................................8-2 
8.3  Thermal Sensors .......................................................................................................................8-2 
8.4  Replacement Thermocouples and RTDs for 344T Temperature Elements.....................................8-4 
8.5  Thermocouple Wire...................................................................................................................8-4 
8.6  Sensors: Type, Range, Span, and Accuracy.................................................................................8-5 
 

 
 

 
Section 8.3.2 

At “Maximum Loop Voltage”, reference to Ex N use added. 

 
Section 8.3.6 

Ex N requirement added. 

 
The cover date has been changed, however, page dates were not changed at this time.  Change bars were 
placed on revised pages in the outside margins.