Emerson MICRO MOTION 2700 Instalační manuál stáhnout pdf (Strana 143)

Transmitter Configuration and Use: Series 1000 and 2000 Transmitters 133

Troubleshooting continued

Troubleshooting DiagramsDefaultsCompensation

4. 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. Do not

disconnect or damage the wires that connect the transmitter to the core processor.

d. Check the core processor LED against the conditions described in Table 10-12.

e. To return to normal operation:

- Gently lower the transmitter onto the base, inserting the cap screws into the slots. Do

not pinch or stress the wires.

- Rotate the transmitter clockwise so that the cap screws are in the locked position.

- Tighten the cap screws, torquing to 20 to 30 in-lbs (2,3 to 3,4 N-m).

5. 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. Do not disconnect or damage the wires that connect the core

processor to the transmitter.

d. Check the core processor LED against the conditions described in Table 10-12.

e. To return to normal operation:

- Gently slide the mounting plate into place. Do not pinch or stress the wires.

- Rotate the mounting plate so that the screws are in the locked position.

- Tighten the screws, torquing to 6 to 8 in-lbs (0,7 to 0,9 N-m).

- Replace the end-cap.

Note: When reassembling the flowmeter components, be sure to grease all O-rings.

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

LED behavior Condition Possible remedy

1 flash per second (ON

25%, OFF 75%)

Normal operation No action required.

1 flash per second (ON

75%, OFF 25%)

Slug flow See Section 10.16.

Solid ON Zero or calibration in

progress

If calibration is in progress, no action required. If no calibration is in

progress, contact Micro Motion. See Section 10.3.

Core processor

receiving between 11.5

and 5 volts

Check power supply to transmitter. See Section 10.13.1, and refer to

Appendix B for diagrams.

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