Azbil PTG71, Руководство пользователя

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Operation with Field Communication software (CFS100)
Azbil Corporation
Model MTG11A/18A, MTG11B/18B, MTG14C
Measurement Range Calibration according to Actual Pressure
For the PTG series smart pressure transmitters, the measurement range must be
calibrated at two points, namely the LRV (input value at 0% output) and URV
(input value at 100% output).
This calibration is done when calibrating actual pressures using a standard
pressure transmitter. For further details, refer to Chapter 6, “Remote
Communication” in CM2-PTG300-2001 for Smart Pressure Transmitter Model
PTG71/72 and Chapter 6, “Description on variable range type transmitters” in
CM2-PTG100-2001 for the Bravolight PTG60/70 Pressure Transmitter.
CAUTION: If this operation is performed while the pressure transmitter process
is under automatic control, outputs may fluctuate, making pressure
transmitter operation dangerous. Before performing this operation,
make sure that you switch the process control loop to manual
control.
Select DEVICE SETUP
→
DIAG/SERVICE
→
Calibration
→
Correct Input.
• To calibrate the LRV value, double-click Correct Input LRV. To calibrate the
URV value, double-click Correct Input URV.
• A warning that the loop should be switched from automatic control to manual
mode is displayed (WARN - Loop should be removed from automatic
control). After switching to manual mode, click OK.
• Apply LRV pressure” or “Apply URV pressure” is displayed. If the value of
the standard pressure generator is equal to LRV (0%) or URV (100%), click
OK.
• “Press OK when pressure is stable” is displayed. After confirming that input
pressure has stabilized, click OK.
• The “Note - Loop may be returned to automatic control” message is
displayed to notify you that you can now switch back to automatic control.
Click OK.