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Reference Manual
00809-0100-4663, Rev BA
January 2010
4-11
Rosemount 8732
Auto Zero
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
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.
Status Review status information regarding the operation of the transducer block.
This is where additional information can be reviewed regarding transmitter
health and diagnostic messages.
375 Transducer Block, Diagnostics, Trims
375 Transducer Block, Diagnostics, Trims
375 Transducer Block, Diagnostics