Yokogawa EJX115A - Manual (Page 22)

<5. Parameter Setting>
5-2
IM 01C25T04-01EN
5.1.3 Output Mode (Characterization Type)
The Output Mode (Characterization Type) is set
as specified in the order when the instrument is
shipped. Follow the procedure below to change
the Output Mode. Sensor Transducer Block Target
Mode need to be changed to Out of Service (O/S)
before changing Output Mode(Characterization
Type).
DTM, EDD Easy Setup → Sensor Transducer Block
→ Target Mode
• Procedure to call up the display
DTM, EDD Easy Setup → Sensor
Transducer Block →
Characterization Type →
→ Linear Linear output
→ User defined
(table)
Signal Characterizer
→ Square root Square root output
5.1.4 Output Scale (Out Scale) and Unit
Analog Input 1 Function Block Target Mode need
to be changed to Out of Service (O/S) before
changing Output Scale(Out Scale) and Output
Scale Unit.
DTM Easy Setup → Analog Input 1 → Target
Mode
EDD Easy Setup → Function Block 1 – Analog
Input → Target Mode
(1) Output Scale (Out Scale)
• Procedure to call up the display
The Out Scale is factory-set as specified by the
customer. To change the range, follow the steps
below.
DTM Easy Setup → Analog Input 1 →
→ LRV Out Scale:Lower Value
→ URV Out Scale:Upper Value
EDD Easy Setup → Function Block 1 – Analog
Input → Output Scale
→ LRV Lower Value
→ URV Upper Value
(2) Out Scale Unit
The unit parameter is set at the factory before
shipment if specified at the time of order. Follow the
procedure below to change the unit parameter.
• Procedure to call up the display
DTM Easy Setup → Analog Input 1 → Out
Scale:Unit
EDD Easy Setup → Function Block 1 – Analog
Input → Output Scale → Unit
5.1.5 Damping time constant (Filter Time
Const)
The damping time constant is set at the factory
before shipment if specified at the time of order with
option code /CD. Follow the procedure below to
change the damping time constant. Target Mode of
Analog Input 1 Function Block need to be changed
to Out of Service (O/S).
DTM Easy Setup → Analog Input 1 → Target
Mode
EDD Easy Setup → Function Block 1 – Analog
Input 1 → Target Mode
• Procedure to call up the display
DTM Easy Setup → Analog Input 1 → Filter
Time Const
EDD Easy Setup → Function Block 1 – Analog
Input 1 → Filter Time Const
5.2 Calibration
The transmitter is factory characterized, Factory
characterization is the process of comparing a
known pressure input with the output of each
transmitter sensor module over the entire pressure
and temperature operating range. During the
characterization process, this comparison
information is stored in the transmitter EEPROM. In
operation, the transmitter uses this factory-stored
curve to produce process variable output (PV), in
engineering units, dependent on the pressure input.
The calibration procedure allows you to adjust
for local conditions, changing how the transmitter
calculates process variables. There are two ways
to calibrate: zero point adjustment typically used to
compensate for mounting position effects or zero
shifts caused by static pressure. A full calibration is
a two-point process, in which two accurate end-
point pressures are applied (equal to or greater
than the range value), and all output is linearized
between them.