ABB 2600T Series Instruction Manual page 35

2 6 0 0 T S E R I E S | P R E S S U R E T R A N S M I T T E R S | O I/ 2 6 6/ F F - E N R E V. E
Wet Ranging operation – SW 3 = 1
The Z (Zero) button performs the 'Lower Range Setting'
operation and sets as 0% the actual measured pressure value.
After the 'Z' button is kept pushed for more than 2 seconds,
when released, the pressure value measured in input is written
in the PRTB_PRIMARY_VALUE_RANGE_0%.
The PRTB_PRIMARY_VALUE_RANGE_100% is shifted in order
to keep the same SPAN.
Before:
• Span = (PRTB_PRIMARY_VALUE_RANGE_100%
- PRTB_PRIMARY_VALUE_RANGE_0%)
After:
• PRTB_PRIMARY_VALUE_RANGE_0% =
PRTB_CAL_VALUE
• PRTB_PRIMARY_VALUE_RANGE_100% =
SPAN + PRTB_ PRIMARY_VALUE _RANGE_0%
The S button performs the 'Upper Range Setting' operation and
sets as 100% of the calibration scale the actual measured
pressure value. After the 'S' button is kept pushed for more
than 2 seconds, when released, the pressure value measured in
input is written in the PRTB_PRIMARY_VALUE_RANGE_100%.
The SPAN changes as consequence.
• PRTB_PRIMARY_VALUE _RANGE_100% =
PRTB_ CAL_VALUE
PV Scaling operation – SW 3 = 0
T The Z button performs the 'ZERO elevation/suppression'
operation. After the 'Z' button is kept pushed for more than 2
second, when released, the PTRB_PRIMARY_VALUE is zeroed.
The zeroing is achieved writing an offset value into
PTRB_BIAS_VALUE to be used in the calculation of the
PTRB_PRIMARY_VALUE
• PTRB_BIAS_VALUE = (PRTB_CAL_VALUE
- PRTB_DESIRED_PRIMARY_VALUE)
The PTRB_BIAS_VALUE (positive or negative) is added in the
calculation algorithm at the PTRB_CAL_VALUE for the
production of the PTRB_PRIMARY_VALUE.
• PTRB_PRIMARY_VALUE =
(PRTB_CAL_VALUE + PRTB_BIAS_VALUE)
The S button (3) performs the 'Reset ZERO elevation/
suppression' operation. After the 'S' button is kept pushed for
more than 1 second, when released, the PTRB_BIAS_VALUE is
reset to Zero eliminating in this way any effect of elevation or
suppression for the PTRB_PRIMARY_VALUE that, after this
operation, returns to produce again the same value of the
PTRB_CAL_VALUE.
• PTRB_BIAS_VALUE = 0 .0
• PTRB_PRIMARY_VALUE = PTRB_CAL_VALUE
IMPORTANT
For more details about the above mentioned parameters,
please refer to the dedicated section of this Manual.
35