Calibration - Fisher FIELDVUE DLC3010 Quick Start Manual

Quick Start Guide
D103214X012

Calibration

Guided Calibration
Field Communicator Configure > Calibration > Primary > Guided Calibration (2-5-1-1)
Guided Calibration recommends an appropriate calibration procedures for use in the field or on the bench based on
your input. Answer questions about your process scenario to reach the calibration recommendation. When feasible,
the appropriate calibration method will be initiated from within the procedure.
Detailed Calibration Examples
PV Sensor Calibration
If the advanced capabilities of the transmitter are to be used, it is necessary to calibrate the PV sensor.
Calibration—with Standard Displacer and Torque Tube
Run the initial calibration near ambient temperature at design span to take full advantage of the available resolution.
This is accomplished by using a test fluid with a specific gravity (SG) close to 1. The value of SG in the instrument
memory during the calibration process should match the SG of the test fluid being used in the calibration. After the
initial calibration, the instrument may be set up for a target fluid with a given specific gravity, or an interface
application, by simple configuration data changes.
1. Run through Guided Setup and verify that all sensor data is correct.
Procedure:
Change the PV mode to Level
If your input observations are going to be made with respect to location of the bottom of the displacer at the
lowest process condition, set the Level Offset value to 0.00
Set the Specific Gravity value to the SG of the test fluid being used.
Establish the test fluid level at the desired process zero point. Make sure that the DLC3010 lever assembly has been
properly coupled to the torque tube (see coupling procedure on page 12). To unlock the lever assembly and allow it to
freely follow the input, close the coupling access door on the instrument. It is often possible to watch the instrument
display and/or the analog output to detect when the fluid hits the displacer, because the output will not start moving
upward until that point is reached.
Select the Min/Max calibration from the Full Calibration menu, and confirm that you are at the 'Min' condition at the
prompt. After the 'Min' point has been accepted, you will be prompted to establish the 'Max' condition. (The 'displacer
completely covered' condition should be slightly higher than the 100% level mark to work correctly. For example, 15
inches above the zero mark would generally be enough for a 14 inch displacer on a 249B, because the amount of
displacer rise expected for that configuration is about 0.6 inch.)
Accept this as the 'Max' condition. Adjust the test fluid level and check the instrument display and current output
against external level at several points distributed across the span to verify the level calibration.
a. To correct bias errors, 'Trim Zero' at a precisely known process condition.
b. To correct gain errors, 'Trim Gain' at a precisely­known high level condition.
DLC3010 Digital Level Controller
February 2016
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