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Reference Manual
00809-0100-4444, Rev AC
Section 8: Maintenance
January 2015
Maintenance
Note
Before changing any of the configuration parameters, be sure to record the original values so
that the transmitter can be returned to the original configuration prior to being placed back into
operation. Failure to return the settings to the original configuration will result in incorrect flow
and totalizer readings.
The instructions for changing the calibration number, units, PV URV, and PV LRV are located in
“Basic setup” on page 36. Instructions for changing the coil drive frequency can be found on
“Coil drive frequency” on page 131.
Set the loop to manual (if necessary) and then complete the following steps:
1. Power down the transmitter.
2. Connect the transmitter to a Rosemount 8714D Calibration Standard.
3. Power up the transmitter with the Rosemount 8714D connected and read the flow rate.
The electronics need about a 5-minute warm-up time to stabilize.
4. Set the 8714D Calibration Standard to the 30 ft/s (9.1 m/s) setting.
5. The flow rate reading after warm-up should be between 29.97 (9.1 m/s) and 30.03 ft/s
(9.2 m/s).
6. If the reading is within the range, return the transmitter to the original configuration
parameters.
7. If the reading is not within this range, initiate a digital trim with the LOI or Handheld
Communicator. The digital trim takes about 90 seconds to complete. No transmitter
adjustments are required.
8.6.4 Universal trim
The universal auto trim function enables the Rosemount 8732EM 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 a Rosemount sensor has a 16-digit calibration number,
in-process calibration is not required. If it does not, or if the sensor is made by another
manufacturer, complete the following steps for in-process calibration. Refer to Appendix A
Implementing a Universal Transmitter.
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.
When the routine is completed, the sensor is ready for use.
LOI menu path Device Setup, Diagnostics, Trims, Universal Trim
Traditional fast keys 1,2,5,5
Device dashboard
2,4,1