Revision 4 STT750 Temperature Transmitter User’s Manual Page vii
Contents
1. Introduction .................................................................................................................................... 1
1.1. Overview ................................................................................................................................ 1
1.2. Features and Options .............................................................................................................. 1
1.2.1. Physical Characteristics .................................................................................................. 1
1.2.2. Functional Characteristics .............................................................................................. 2
1.3. STT750 SmartLine Transmitter Nameplate ........................................................................... 3
1.4. Safety Certification Information ............................................................................................. 3
1.5. Transmitter Adjustments ........................................................................................................ 3
1.6. Display .................................................................................................................................... 4
1.7. Optional 3-Button Assembly .................................................................................................. 4
2. Application Design ......................................................................................................................... 5
2.1. Overview ................................................................................................................................ 5
2.2. Safety ...................................................................................................................................... 5
2.2.1. Accuracy ......................................................................................................................... 5
2.2.2. Diagnostic Messages ...................................................................................................... 5
3. Installation and Startup ................................................................................................................... 7
3.1. Installation Site Evaluation ..................................................................................................... 7
3.2. Honeywell MC Toolkit........................................................................................................... 7
3.3. Display Installation Precautions ............................................................................................. 7
3.4. Mounting STT750 SmartLine Temperature Transmitters ...................................................... 8
3.4.1. Summary......................................................................................................................... 8
3.4.2. Mounting Dimensions .................................................................................................. 10
3.4.3. Bracket Mounting Procedure ........................................................................................ 12
3.5. Wiring a Transmitter ............................................................................................................ 13
3.5.1. Loop Power Overview .................................................................................................. 13
3.5.2. Wiring Variations ......................................................................................................... 15
3.5.3. Loop Wiring Procedure ................................................................................................ 15
3.5.4. Grounding and Lightning Protection ............................................................................ 16
3.5.5. Explosion-Proof Conduit Seal ...................................................................................... 16
3.5.6. Input Sensor Wiring ..................................................................................................... 17
3.6. Startup .................................................................................................................................. 18
3.6.1. Overview ...................................................................................................................... 18
3.6.2. Startup Tasks ................................................................................................................ 18
3.6.3. Output Check Procedures ............................................................................................. 18
3.6.4. Constant Current Source Mode Procedure ................................................................... 19
4. Operation ...................................................................................................................................... 20
4.1. Overview .............................................................................................................................. 20
4.2. Three-Button Operation ........................................................................................................ 20
4.2.1. Menu Navigation .......................................................................................................... 21
4.2.2. Data Entry ..................................................................................................................... 21
4.2.3. Editing a Numeric Value .............................................................................................. 22
4.2.4. Selecting a new setting from a list of choices .............................................................. 22
4.2.5. The Display Menu ........................................................................................................ 23
4.3. Three Button Operation with no Display Installed ............................................................... 27
4.3.1. Zero Adjustment ........................................................................................................... 27
4.3.2. Span Adjustment .......................................................................................................... 27
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