Troubleshooting
11.24.1Checking the core processor LED
To check the core processor LED:
1.Maintain power to the transmitter.
2.Remove the core processor lid (see Figure
3.Check the core processor LED against the conditions described in Table
4.To return to normal operation, replace the lid.
Note: When reassembling the meter components, be sure to grease all
Table
LED behavior | Condition | Possible remedy |
|
|
|
1 flash per second (ON | Normal operation | No action required. |
25%, OFF 75%) |
|
|
|
|
|
1 flash per second (ON | Slug flow | See Section 11.17. |
75%, OFF 25%) |
|
|
|
|
|
Solid ON | Zero or calibration in | If calibration is in progress, no action required. If no calibration is in |
| progress | progress, contact Micro Motion. See Section 1.8. |
|
|
|
| Core processor | Check power supply to transmitter. See Section 11.14.1, and refer to |
| receiving between 11.5 Appendix B for diagrams. | |
| and 5 volts |
|
|
|
|
3 rapid flashes, | Sensor not recognized | Check wiring between transmitter and sensor (remote core processor |
followed by pause |
| with remote transmitter installation). Refer to Appendix B for diagrams, |
|
| and see your transmitter installation manual. |
|
|
|
| Improper configuration | Check sensor characterization parameters. See Section 4.2. |
|
|
|
| Broken pin between | Contact Micro Motion. See Section 1.8. |
| sensor and core |
|
| processor |
|
|
|
|
4 flashes per second | Fault condition | Check alarm status. |
|
|
|
OFF | Core processor | • Verify power supply wiring to core processor. Refer to Appendix B for |
| receiving less than 5 | diagrams. |
| volts | • If transmitter status LED is lit, transmitter is receiving power. Check |
|
| voltage across terminals 1 (VDC+) and 2 |
|
| Normal reading is approximately 14 VDC. If reading is normal, |
|
| internal core processor failure is possible. Contact Micro Motion. See |
|
| Section 1.8. If reading is 0, internal transmitter failure is possible. |
|
| Contact Micro Motion. See Section 1.8. If reading is less than 1 VDC, |
|
| verify power supply wiring to core processor. Wires may be switched. |
|
| See Section 11.14.1, and refer to Appendix B for diagrams. |
|
| • If transmitter status LED is not lit, transmitter is not receiving power. |
|
| Check power supply. See Section 11.14.1, and refer to Appendix B |
|
| for diagrams. If power supply is operational, internal transmitter, |
|
| display, or LED failure is possible. Contact Micro Motion. See |
|
| Section 1.8. |
|
|
|
| Core processor | Contact Micro Motion. See Section 1.8. |
| internal failure |
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108 | Micro Motion® Model 1500 Transmitters with the Filling and Dosing Application |