Output Mode (Linear/Sq Root) - YOKOGAWA Dpharp vigilantplant EJA Series User Manual

NOTE
It is possible to set LRV
reverses the 4 to 20 mA output signal.
Conditions: LSL
LSL
|URV
The 4 to 20 mA output does not correspond to
the scale of the indicator under the following
conditions in which;
• the equipment with standard specification is
used with the setting changed to the above
setting.
• the customer specified equipment (with the
above factory-setting) is used with the setting
changed to the normal (standard) setting.
In the cases above, replace the scale with one
which corresponds correctly to the 4 to 20 mA.
(b) Changing the Ranges While Applying an
Actual Input — Apply values
This feature allows the lower and upper range values to
be setup automatically with the actual input applied. If
the upper and lower range values are set, "URV" and
"LRV" are changed at the same time.
The measurement span is determined by the upper and
lower range valves. Changing the lower range value
results in the upper range value change automatically,
keeping the span constant.
Example: To change the range from 0 to 2500 mmH
500 to 3000 mmH
Call up the Apply Values display.
1. Device setup
3. Basic setup
3. Re-range
2. Apply values
1
EJA:
WARN-Loop should be
removed from
automatic control
Press OK (F4).
DEL SET ABORT OK
2
EJA:
Set the:
1 4mA
2 20mA
(ENTER)
3 Exit
To set the lower range value, select
4mA and press ENTER (F4).
HELP SAVE ABORT ENTER
3
EJA:
Apply new 4ma input
Apply the pressure of 500mmH
HELP DEL ABORT OK After obtaining a stable pressure,
press OK (F4).
URV. This setting
LRV USL
URV USL
LRV| Min. Span
O to
2
O
2
(OK)
(OK)
4
EJA:
Current applied
process value:
500.01 mmH2O
1 Set as 4mA value
2 Read new value
3 Leave as found
HELP DEL SEND
5
EJA:
Set the
1 4mA
2 20mA
3 Exit
HELP DEL

(4) Output Mode (Linear/Sq root)

The output mode has already been set to a Linear
output (Linear). Follow the procedure below to
change the mode.
Example: To change the mode from Linear to Sq root.
Call up the Xfer fnctn display.
1. Device setup
3. Basic setup
5. Xfer fnctn
1
EJA:
Transfer function
Linear
Linear
Sq root
DEL SET
The output mode is set as specified in the order when
the instrument is shipped.
If the instrument is equipped with an integral indicator
and Transfer function is sq root, "
O.
2
the integral indicator.
F0213.EPS
2-8
2. HART COMMUNICATOR OPERATION
(ENTER)
The LRV to be changed is 500.01
mmH O.
ABORT ENTER
2
• Selecting item 1 sets LRV to
500.01 mmH
2
• Selecting item 2 reads LRV again.
To set LRV = 500.01, select item 1
and press ENTER (F4).
2
ABORT ENTER
(ENTER)
Select Exit and press ENTER (F4).
Check the value after completing
the range change with URV and
LRV.
* The span is maintained the same
as when changing LRV with Apply
values. In this case, if LRV is
changed from 0 to 500, URV is
changed automatically to 3000.
ESC ENTER
(ENTER)
(SEND)
[1] Select Sq root, and press
ENTER (F4).
[2] Press SEND (F2) to send the
data to the transmitter, then
check to confirm that
disappears.
O.
F02131.EPS
SEND
F0214.EPS
" is displayed on
IM 01C22T01-01E