Emerson Process Management 8732 manual Installation Check and Guide, Before You Begin Transmitter

Rosemount 8732

Reference Manual

00809-0100-4663, Rev BA January 2010

INSTALLATION CHECK AND GUIDE

Use this guide to check new installations of Rosemount magnetic flowmeter systems that appear to malfunction.

Before You Begin

Transmitter

Apply power to your system before making the following transmitter checks.

1.Verify that the correct sensor calibration number is entered in the transmitter. The calibration number is listed on the sensor nameplate.

2.Verify that the correct sensor line size is entered in the transmitter. The line size value is listed on the sensor nameplate.

3.Verify that the function blocks are not in Out of Service mode.

4.Verify that the transmitter is functioning correctly by using the 8714i Meter Verification diagnostic or the 8714D Calibration Reference Standard.

Sensor

Be sure that power to your system is removed before beginning sensor checks.

1.For horizontal flow installations, ensure that the electrodes remain covered by process fluid.

For vertical or inclined installations, ensure that the process fluid is flowing up into the sensor to keep the electrodes covered by process fluid.

2.Ensure that the grounding straps on the sensor are connected to grounding rings, lining protectors, or the adjacent pipe flanges. Improper grounding will cause erratic operation of the system.

Wiring for Remote Configurations

1.The signal wire and coil drive wire must be twisted shielded cable. Emerson Process Management, Rosemount division. recommends 20 AWG twisted shielded cable for the electrodes and 14 AWG twisted shielded cable for the coils.

2.The cable shield must be connected at both ends of the electrode and coil drive cables. Connection of the signal wire shield at both ends is necessary for proper operation. It is recommended that the coil drive wire shield also be connected at both ends for maximum flowmeter performance

3.The signal and coil drive wires must be separate cables, unless Emerson Process Management specified combo cable is used. See Table 2-2 on page 2-11.

4.The single conduit that houses both the signal and coil drive cables should not contain any other wires.

Process Fluid

1.The process fluid conductivity should be 5 microsiemens (5 micro mhos) per centimeter minimum.

2.The process fluid must be free of air and gasses.

3.The sensor should be full of process fluid.

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