Trim Instrument Temperature; Trim Process Temperature; Manual Entry Of Process Temperature; Analog Output Calibration - Fisher FIELDVUE DLC3010 Instruction Manual

Instruction Manual
D102748X012

Trim Instrument Temperature

Follow the prompts on the Field Communicator to trim the instrument temperature.

Trim Process Temperature

Trim Process Temperature is available if the Process Temperature Source is not Manual. Follow the prompts on the
Field Communicator to trim the process temperature.

Manual Entry of Process Temperature

Field Communicator Configure > Manual Setup > Process Fluid > Process Temperature > Change Proc Temp (2-2-3-2-2)
If a process temperature sensor (RTD) is not installed, it is possible to manually set the Digital Process Temperature
variable to the target process temperature. This value will be used by any SG-compensation tables that the user has
entered. If no compensation tables are active, the Digital Process Temperature value may be used to document the
process temperature at which the instrument was calibrated, or the process temperature for which the stored torque
rate is pre-compensated.
Follow the prompts on the Field Communicator to edit the Digital Proc Temp.

Analog Output Calibration

Scaled D/A Trim

Field Communicator Configure > Calibration > Secondary > Analog Output Calibration > Scaled D/A Trim (2-5-2-2)
This procedure allows trimming the gain and offset of the Digital‐to‐Analog (D/A) converter to adjust the accuracy at
which the output follows 4 to 20 mA current commands from the firmware. This relationship is initially set in the
factory, and should not require frequent user adjustment. Reasons for using this procedure include:
D Correction for component aging after the instrument has been in service for an extended period.
D Adjusting D/A calibration to be optimum at the normal operating temperature, when that temperature is
considerably removed from room temperature conditions.
The procedure is iterative, and will eventually reach a resolution limit where attempts to improve the result will cycle
at a few decimal places to either side of the target.
Follow the prompts on the Field Communicator to trim the D/A output.
1. Scale the output from 4 to 20 mA? If your reference meter is graduated in "mA", select Proceed and go to step 5. If
the reference reading is presented in some other unit system, such as "%" or "mm", select Change and continue
with step 2.
2. Enter the scale low output value.
3. Enter the scale high output value.
4. If the high and low output values are correct, select Proceed and continue to step 5. If they are not correct, select
Change and return to step 2.
5. Connect a reference meter across the test connections in the terminal box. See the Test Connections procedure in
the Installation section. You can also connect a reference meter in the loop as shown in figure 2‐9.
6. The Field Communicator commands the instrument to set its output to 4 mA or the low output value.
7. Enter the reading from the reference meter.
Configuration
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