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136 Transmitter Configuration and Use: Series 1000 and 2000 Transmitters
Troubleshooting continued
10.26 Checking sensor coils and RTD
Problems with sensor coils can cause several alarms, including sensor failure and a variety of
out-of-range conditions. Testing the sensor coils involves testing the terminal pairs and testing for
shorts to case.
10.26.1 9-wire remote or remote core processor with remote transmitter installation
If you have a 9-wire remote installation or a remote core processor with remote transmitter (see
Section 1.3 and refer to Appendix B for diagrams):
1. Power down the transmitter.
2. If the transmitter is in a hazardous area, wait five minutes.
3. Remove the end-cap from the core processor housing.
4. Unplug the terminal blocks from the terminal board.
5. Using a digital multimeter (DMM), check the pickoff coils listed in Table 10-13 by placing the
DMM leads on the unplugged terminal blocks for each terminal pair. Record the values.
6. There should be no open circuits, i.e., no infinite resistance readings. The LPO and RPO
readings should be the same or very close (± 5 ohms). If there are any unusual readings, repeat
the coil resistance tests at the sensor junction box to eliminate the possibility of faulty cable.
The readings for each coil pair should match at both ends.
7. Leave the core processor terminal blocks disconnected. At the sensor, remove the lid of the
junction box and test each sensor terminal for a short to case by placing one DMM lead on the
terminal and the other lead on the sensor case. With the DMM set to its highest range, there
should be infinite resistance on each lead. If there is any resistance at all, there is a short to
case.
Table 10-13 Coils and test terminal pairs
Coil
Test terminal pair
Colors Numbers
Drive coil Brown to red 3 — 4
Left pickoff coil (LPO) Green to white 5 — 6
Right pickoff coil (RPO) Blue to gray 7 — 8
Resistance temperature detector (RTD) Yellow to violet 1 — 2
Lead length compensator (LLC) (all sensors except CMF400 I.S. and T-Series)
Composite RTD (T-Series sensors only)
Fixed resistor (CMF400 I.S. sensors only)
Yellow to orange 1 — 9
- Micro Motion 1
- Series 1000 and 1
- Series 2000 Transmitters 1
- Contents 5
- Chapter 1 11
- Before You Begin 11
- Before You Begin continued 13
- Topic Document 13
- Term Definition 13
- Item Configuration data 15
- Chapter 2 17
- Using the Transmitter Display 17
- –8.100E 5 19
- Chapter 3 21
- Poll button in the Connect 26
- 1 and 2, or to the 26
- Connect to Device 32
- Chapter 4 33
- 375 Field Communicator 33
- Chapter 5 39
- Flowmeter Startup 39
- Flowmeter Startup continued 40
- 5.5.3 Zeroing with ProLink II 50
- Chapter 6 53
- Sensor type 54
- T- S er ie s O t he r 54
- Newer tag Older tag 55
- Flow FCF X.XXXX FT X.XX 56
- Terminals 58
- Default Process 58
- Mass flow unit 60
- Volume flow unit 61
- ProLink II code 69
- Communicator 69
- Polarity 75
- Output power 75
- Description 75
- Assignment ProLink II code 77
- Using the Transmitter 79
- Chapter 7 79
- • Model 1700 AN 84
- • Model 1700 IS 84
- • Model 2700 AN 84
- • Model 2700 IS 84
- • Model 2700 CIO 84
- Scroll optical switch 85
- Select optical switch 85
- Function name Communicator 86
- ProLink II 86
- ProLink 87
- Totalizer Control 87
- With a Communicator 88
- Chapter 8 89
- Optional Configuration 89
- Table 8-1 Configuration map 90
- Special 92
- • Model 2500 CIO 93
- Variable Description 94
- Cutoff type Default Comments 96
- Example 1 100
- Example 2 100
- Example 3 101
- Informational panel of the 102
- Status window 102
- Scroll to view process 104
- Max Int. Totalizers stop 106
- Parameter 109
- Series 1000 Series 2000 110
- Process variable 110
- PV SV TV QV PV SV TV QV 110
- Parameter Description 111
- Chapter 9 113
- Compensation, and Polling 113
- Pressure unit 114
- Static pressure 116
- Polled Var 1 119
- Chapter 10 121
- Troubleshooting 121
- Troubleshooting continued 122
- Section Topic 122
- Symptom Cause Possible remedy 132
- Pickoff value 141
- Cause Possible remedy 141
- Test terminal pair 146
- Colors Numbers 146
- Possible cause Solution 147
- Appendix A 151
- Default Values and Ranges 151
- Appendix B 155
- Appendix C 167
- Calibrating the Transmitter 167
- Appendix D 175
- Name Description 176
- Available process variables 178
- Slope and offset 181
- Appendix E 183
- Other configuration options 185
- Preferences menu 187
- Figure E-4 Communicator menus 188
- Appendix F 193
- Figure F-4 Communicator menus 197
- Appendix G 203
- Transmitters 203
- Figure G-4 Communicator menus 207
- Enter password if required 212
- Appendix H 219
- Figure H-4 Communicator menus 223
- Appendix I 235
- Configuration 237
- Figure I-4 Communicator menus 239
- On-Line Menu 240
- 3 Basic Setup 240
- 4 Detailed Setup 240
- 5 Review 243
- Appendix J 251
- Select to disable 252
- Select to enable 252
- Index continued 256
- *20001715* 264
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