Yokogawa EJX438B - Manual (Page 52)

<7. Setting Parameters>
7-18
IM 01C27H01-01EN
NOTE
When the device detects AL01 and AL02, the
LCD display stays on regardless of the status
in LCD mode. See Table 8.3 and 8.4 Error
Message Summary for details.
7.3.4 Tag and Device Information
If these are specified when ordering, the designated
Tag No. and device information are set and
shipped. Tag No. and device information can be
checked as follows.
• Procedure to call up the tag No. and device
information
- Device Tag ( Software Tag )
This is specified when writing characters (up
to 16 characters) of amplifiers TAG that differ
from characters specified in Tag No.
Refer to section 7.4 “Connection to the Field
Wireless Network” for confirmation.
- Tag Description
This is a universal parameter to store the
comment that describes the content of the
tag located in the TRANSDUCER and AI
blocks.
The AI1, AI2, and AI3 blocks of the AI blocks
correspond to the differential pressure, static
pressure, and temperature, respectively.
• When changing the device information, input
the information based on the following limitation
on the number of characters.
- Message function (up to 32 characters)
TRANSDUCER block : Tag Description
AI1-AI3 block : Tag Description
7.3.5 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 Unit display (Units
Index)
Al1 - Al3 block : Scale. Units Index
To change the Unit display, choose desired
unit among the list of displayed unit selecting
AI1 block as for the differential pressure, AI2
as for the static pressure and AI3 block as for
temperature in the AI blocks.
7.3.6 Range Change
The range values are factory-set as specified by
the customer. To change the range, follow the steps
below.
The measurement span is determined by the upper
and lower range values. In this method, the upper
and lower range values can be set independently,
and the span changes according to the range limit
values sent to the transmitter.
• Procedure to call up the PV Range display.
AI1, AI2 block : PV Range
Select the AI1 block for the differential pressure
and the AI2 block for the static pressure, then
select “EU at 0%” and “EU at 100%” displayed
in the PV Range parameters, and input the
lower range and upper range values for the
range, respectively.
7.3.7 Output Mode
The output mode of the output signal can be set as
No Linearization or Sq root.
• Procedure to call up the Linearization Type
display
AI1, AI2 block : Linearization Type
Select the AI1 block for the differential pressure
and the AI2 block for the static pressure, and
then select No Linearization or Sq root for the
Linearization Type parameter.