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SMV800 Modbus User's Guide
Revision 1.0
4.1.4. Dual / Triple Calibration
The transmitter will have the required calibration set as selected by the user when the transmitter
is purchased; either single, dual or triple calibration for Differential Pressure and Static Pressure.
•
Calibration A (Cal A) standard
•
Calibration B (Cal B)
•
Calibration C (Cal C)
Each factory calibration set (A, B or C) includes a calibration performed at LRV pressure and one
performed at URV pressure.
Once the transmitter is in the field the user will be able to select one of the 3 factory calibration
sets. The user can select one of the calibrations directly or select automatic mode which will pick
the set that most closely matches the currently programmed URV and LRV values. The
calibration selection is re-evaluated whenever a new range is written (new URV and LRV values)
or the selection is changed.
If all three calibrations have not been performed at the factory, then set A is selected and the
default values have no effect on the Process Values.
Navigate to Maintenance->Calibration and Correction Records and select the Required
Calibration option in the drop-down box “Differential Pressure Factory Calibration” for
Differential pressure selection and “Static Pressure Factory Calibration” for static pressure
required calibration respectively.
The tabs “Differential Pressure Factory Calibration” and “Differential Pressure Factory
Calibration” as shown in above screen provides details of available calibrations, selected
calibrations,active calibration and its range.Incase if no factory calibration is available then
it screen will not have more details.
The above selections can be made manually using the registers defined for Factory
calibration configuration selection. Refer Communication Table for registers in the range
315-320.
Содержание SMV800
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