YOKOGAWA DpharpEJX vigilantplant EJX Series, Manual

Page: 16 / 45

IM 01C25T01-01E 3-8
3. OPERATION
(2) Apply values — changing the ranges while
applying an actual Input
• 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.
1
Press OK (F4) .
Call up the Apply values display.
EJX:YOKOGAWA
WARN-Loop should be
removed from
automatic control
DEL SET ABORT OK
EJX:YOKOGAWA
Set the:
1 4mA
2 20mA
3 Exit
HELP SAVE ABORT ENTER
2
To set the lower range value, select
4mA and press ENTER (F4) .
EJX:YOKOGAWA
Apply new 4ma input
HELP DEL ABORT OK
3
Apply the pressure of 500mmH
2
O.
After obtaining a stable pressure,
press
OK (F4) .
(ENTER)
(OK)
(OK)
1. Device setup
3. Basic setup
3. Re-range
2. Apply values
Example: To change the range from 0 to 2500 mmH
2
O to
500 to 3000 mmH
2
O
F0311.EPS
EJX:YOKOGAWA
Current applied
process value: 500.01
mmH2O
1 Set as 4mA value
2 Read new value
3 Leave as found
DEL ABORT
4
The LRV to be changed is 500.01
mmH
2
O.
• Selecting item 1 sets LRV to
500.01 mmH
2
O.
• Selecting item 2 reads LRV again.
To set LRV = 500.01, select item 1
and press
ENTER (F4) .
HELP SEND ENTER
(ENTER)
EJX:YOKOGAWA
Set the
1 4mA
2 20mA
3 Exit
HELP ABORT
5
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.
DEL ENTER
× 2
(ENTER)
• The measurement span is determined by the upper
and lower range values. Changing the lower range
value causes the upper range value to change
automatically, keeping the span constant. If a change
in the lower range value causes the upper range value
to exceed the measuring limit of the transmitter, an
error message appears and the transmitter holds the
output signal right before the error occurred. Enter
the correct values within the range of the sensor
limits.
• Note that changing the upper range value does not
cause the lower range value to change. Thus, chang-
ing the upper range value also changes the span.