<7. Setting Parameters>
7-15
IM 01C27H01-01EN
• Procedure to call up the calibration adjustment
parameter (Cal Cmd).
AI1 block : Cal Cmd : CAL_LOW
Confirm the lower limit of the measurement
range in CAL_LOW of the differential pressure
(AI1 block) Cal Cmd parameter.
• Procedure to call up the calibration status
parameter (Cal Status).
AI1 block : Cal Status
Confirm the value of CAL_SUCCESS (1) using
the Cal Status parameter.
• Procedure to call up the upper limit adjustment
parameter (Calibration Highest Point).
AI1 block : Calibration Highest Point
Set the upper limit adjustment value for the
differential pressure (AI1 block) Calibration
Highest Point parameter. Apply a reference
pressure corresponding to the upper limit of the
measurement range to the differential pressure/
pressure transmitter and confirm the reference
pressure when it has stabilized.
• Procedure to call up the calibration adjustment
parameter (Cal Cmd).
AI1 block : Cal Cmd : CAL_HIGH
Confirm the upper limit of the measurement
range in CAL_HIGH of the differential pressure
(AI1 block) Cal Cmd parameter.
• Procedure to call up the calibration status
parameter (Cal Status).
AI1 block : Cal Status
Confirm the value of CAL_SUCCESS (1) using
the Cal Status parameter.
(3) Adjustments for Static Pressure
For the EJX differential transmitters, zero point and
span adjustments of static pressure is performed in
the same way as with the primary process variable
(PV).
Adjustment should be performed using the static
pressure (AI2 block) Cal Cmd parameter. After
calibration, confirm the status by using the static
pressure (AI2 block) Cal Status.
• Procedure to call up the calibration adjustment
parameter (Cal Cmd).
AI2 block : Cal Cmd
Perform differential pressure zero/span adjustment
before static pressure zero/span adjustment.
(4) Reset Adjustment
Reset Adjustment clear the amount of adjustment.
Reset Ajustment can be performed using CAL_
CLEAR of the differential pressure (AI1 block) Cal
Cmd parameter for the input pressure and using
CAL_CLEAR of the static pressure (AI2 block) Cal
Cmd parameter for the static pressure. After Reset
Adjustment, confirm the status by using Cal Status
of the cleared block.
The amount of adjustment made by the external
zero-adjustment screw can be reset to the initial
setting as well.
• Procedure to call up the calibration adjustment
parameter (Cal Cmd).
AI1, AI2 block : Cal Cmd : CAL_CLEAR
7.3.15 Software Write Protect
Hardware write protection and software write
protection functions are available for this
transmitter.
• Procedure to call up the protection setting
parameter (UAP Option)
UAPMO block : UAP Option
The following settings can be configured in the
UAP Option parameter.
- Setting to enable or disable changing
the setting to the Diagnostic Switch and
Diagnostic Configuration parameters.
- Setting to enable or disable the hardware
write protection switch.
- Setting to enable or disable software write
protection.
• Procedure to call up the protection setting
display parameter (Hardware Write Protect)
UAPMO block : Hardware Write Protect
The Hardware Write Protect parameter enables
the switch status of hardware write protection to
be displayed.
For the relationship between hardware write
protection and software write protection, refer to
section 9. “Parameter Summary.”
