Yokogawa EJX440A - Manual (Page 20)

<3. Operation>
3-10
IM 01C25T01-01E
(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
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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).
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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.ai
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)
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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, changing the upper range value also
changes the span.
3.4.4 Output Mode
The mode setting for the output signal and the
integral indicator can be performed independently.
The output mode for the output signal is set as
specified in the order when the instrument is
shipped. Follow the procedure below to change the
mode.
1
F0312.ai
Call up the Xfer fnctn display.
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Xfer function
Linear
Linear
Sq root
DEL SET ESC ENTER
[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.
(ENTER)
1. Device setup
3. Basic setup
5. Xfer fnctn
(SEND)
SEND
Example: To change the mode from Linear to Sq root.