Emerson Process Management 8732 manual Status, Auto Zero, Universal Trim

Reference Manual

00809-0100-4663, Rev BA January 2010

Rosemount 8732

Status

375 Transducer Block, Diagnostics

Auto Zero

375 Transducer Block, Diagnostics, Trims

The auto zero function initializes the transmitter for use with the 37 Hz coil drive mode only. Run this function only with the transmitter and sensor installed in the process. The sensor must be filled with process fluid at zero flow. Before running the auto zero function, be sure the coil drive mode is set to 37 Hz (Auto Zero will not run with the coil drive frequency set at 5 Hz).

Set the loop to manual if necessary and begin the auto zero procedure. The transmitter completes the procedure automatically in about 90 seconds. A symbol appears in the lower right-hand corner of the display to indicate that the procedure is running.

Universal Trim

375 Transducer Block, Diagnostics, Trims

The universal auto trim function enables the Rosemount 8732E to calibrate sensors that were not calibrated at the Rosemount factory. The function is activated as one step in a procedure known as in-process calibration. If your Rosemount sensor has a 16-digit calibration number, in-process calibration is not required. If it does not, or if your sensor is made by another manufacturer, complete the following steps for in-process calibration.

1.Determine the flow rate of the process fluid in the sensor.

NOTE

The flow rate in the line can be determined by using another sensor in the line, by counting the revolutions of a centrifugal pump, or by performing a bucket test to determine how fast a given volume is filled by the process fluid.

2.Complete the universal auto trim function.

3.When the routine is completed, the sensor is ready for use.

Review status information regarding the operation of the transducer block. This is where additional information can be reviewed regarding transmitter health and diagnostic messages.

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