Emerson MICRO MOTION 2700 Manual de instalación descargar pdf (Pagina 144)

134 Transmitter Configuration and Use: Series 1000 and 2000 Transmitters

Troubleshooting continued

10.25.2 Core processor resistance test

To perform the core processor resistance test:

1. Determine your installation type. See Section 1.3 and refer to Appendix B for diagrams.

2. If you have a 4-wire remote installation or a remote core processor with remote transmitter

installation, remove the core processor lid (for Model 1500/2500 transmitters, see Figure B-2;

for Model 1700/2700 transmitters, see Figure B-11).

3. If you have an integral installation (Model 1700/2700 transmitters only):

a. Loosen the four cap screws that fasten the transmitter to the base (see Figure B-8).

b. Rotate the transmitter counter-clockwise so that the cap screws are in the unlocked

position.

c. Gently lift the transmitter straight up, disengaging it from the cap screws.

4. If you have a 9-wire remote installation (Model 1700/2700 transmitters only):

a. Remove the end-cap (see Figure B-10).

b. Inside the core processor housing, loosen the three screws that hold the core processor

mounting plate in place. Do not remove the screws. Rotate the mounting plate so that the

screws are in the unlocked position.

c. Holding the tab on the mounting plate, slowly lower the mounting plate so that the top of

the core processor is visible.

5. Disconnect the 4-wire cable between the core processor and the transmitter.

3 rapid flashes,

followed by pause

Sensor not recognized Check wiring between transmitter and sensor (9-wire remote

installation or remote core processor with remote transmitter

installation). Refer to Appendix B for diagrams, and see your

transmitter installation manual.

Improper configuration Check sensor characterization parameters. See Section 6.2.

Broken pin between

sensor and core

processor

Contact Micro Motion. See Section 10.3.

4 flashes per second Fault condition Check alarm status.

OFF Core processor

receiving less than 5

volts

• Verify power supply wiring to core processor

. Refer to Appendix B for

diagrams.

• If transmitter status LED is lit, transmitter is receiving power. Check

voltage across terminals 1 (VDC+) and 2 (VDC–) in core processor.

Normal reading is approximately 14 VDC. If reading is normal,

internal core processor failure is possible. Contact Micro Motion. See

Section 10.3. If reading is 0, internal transmitter failure is possible.

Contact Micro Motion. See Section 10.3. If reading is less than

1 VDC, verify power supply wiring to core processor. Wires may be

switched. See Section 10.13.1, and refer to Appendix B for

diagrams.

• If transmitter status LED is not lit, transmitter is not receiving power.

Check power supply. See Section 10.13.1, 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 10.3.

Core processor

internal failure

Contact Micro Motion. See Section 10.3.

Table 10-12 Core processor LED behavior, flowmeter conditions, and remedies (continued)

LED behavior Condition Possible remedy

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 263 264

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Emerson MICRO MOTION 2700 Manual de instalación Pagina 144

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