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2 6 6 H S H MODBUS TR A N S M IT TE R |
P R E SSU R E/ T EM P ER AT U R E M U LT I VA R I A B L E | O I/ 2 6 6 H SH M T- EN R E V. A
7.4 Configuring the transmitter without an
integral LCD HMI
The “lower range value” and “span” parameters can be set
directly on the transmitter using the external or internal
push buttons.
The transmitter has been calibrated by the manufacturer
based on the order information. The tag plate contains
information on the “lower range value” and “upper range
value” set. In general, the following applies:
Important. Reducing station with adjustable pressure and
reference displays can be used as pressure generators.
When making the connection, please ensure that there are no
residual fluids (for gaseous testing materials) or air bubbles
(for fluid testing materials) in the impulse lines, since these
can lead to errors during inspection. Any potential measuring
error for the pressure generator should be at least three times
smaller than the desired measuring error for the transmitter. It
is recommended that the damping is set to 1 second.
7.6 HMI as feedback of the local push button operations
As consequence of the operations described in the section 6, when the Z or S buttons are released, the feedback of the
executed operation is displayed in the bottom of the LCD (same position as per diagnostic messages):
Message
Description
! Oper Done
The push button operation has been successfully executed
! Proc Too
Low
The Pressure measured in input is too low and not acceptable for the requested operation
! Proc Too
High
The Pressure measured in input is too high and not acceptable for the requested operation
! New URV
Error
The Zero (Z) operation cannot be accepted because the URV would be shifted outside the Upper Sensor limit
! Span Error
The Span (S) operation cannot be accepted because the new URV would be too close to the LRV and their difference lower
than the Minimum Span value
! Oper
Disabled
The push button operation has been refused because the Write Protection is enabled.
! LRV Too
Low
New LRV is too low and not acceptable for the requested operation
LRV Too
High
New LRV is too high low and not acceptable for the requested operation
URV Too
Low
New URV is too low and not acceptable for the requested operation
URV Too
High
New URV is too high and not acceptable for the requested operation
Armed
Device is armed to accept HART command 73 “Find Device”. This message can be triggered only during the device wakeup
operation
7.7 Correction of zero shift caused by installation with PV Zero Bias / Offset
— Raise the dip switch 3 in 1 (up) position.
— Press the “Z” button. This sets the digital PV value will be set to 0 (zero).
— To reset the PV zero bias setting, press the “S” button.
Important. When the transmitter has been rezeroed following the above procedure, a zero bias/offset value is applied and
stored in the transmitter memory.
Important. This action can be performed both by using the external, non-intrusive push buttons (option R1) and the on-board
buttons of the integrated LCD display.
7.5 LRV and URV configuration
— Apply the pressure for the “lower range value” and
wait approx. 30 s until it has stabilized.
— Press the “Z” button (internal or external) for at least
5 seconds. This sets the output current to 4 mA.
— Apply the pressure for the “upper range value” and
wait approx. 30 s until it has stabilized.
— Press the “S” button (internal or external) for at least 5
seconds. This sets the output current to 20 mA.
— If required, reset the damping to its original value.
— Record the new settings. The respective parameter
will be stored in the non-volatile memory 10 seconds
after the “Z” or “S” buttons are last pressed.
