Yokogawa EJX930A - Manual (Page 28)

<3. Parameter Setting>
3-17
IM 01C25R02-01E
3.3 Detailed Setup
3.3.1 Analog Output Signal Adjustable
Range
Output signal adjustable range at normal operating
condition are set as shown below at the factory
when the instrument is shipped, and output signal
are limited by these value.
Lower limit Upper limit
Standard
Option code /C1
3.8 mA 21.6 mA
Option code /C2 and /C3 3.8 mA 20.5 mA
Output signal range can be changed between
3.8mA and 21.6mA to match it to the equipment on
the receiving side.
Lower value is set at AO lower limit and upper
value is set at AO upper limit respectively.
Follow the procedure below to change the upper
and lower values.
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Detailed setup →
Output condition → Analog output →
DTM (HART 5) Configuration → Analog output →
→ AO lower
limit
Set the lower value (mA)
→ AO upper
limit
Set the upper value (mA)
Set the values as below.
Lower value < Upper value
3.3.2 Static Pressure Setup
(1) Selection of Gauge pressure and Absolute
pressure
Either the gauge pressure or absolute pressure can
be selected to display on the LCD display.
Absolute pressure is selected when the instrument
is shipped.
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Detailed setup →
Signal condition → SP Setup →
DTM (HART 5) Configuration → Static Pressure
Sensor →
→ A / G Select Select “Gauge” or “Absolute”
(2) Selection of pressure side
Either the high or low pressure side of capsule can
be selected to monitor the static pressure.
High pressure side is selected when the instrument
is shipped.
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Detailed setup →
Signal condition → SP Setup →
DTM (HART 5) Configuration → Static Pressure
Sensor →
→ SP H/L
Select
Select “High” or “Low”
3.3.3 External Temperature Fixation Mode
The external temperature can be fixed with this
mode. The parameter setting to enter the Fixation
Mode when the RTD sensor is disconnected is also
possible.
• Procedure to call up the display
DD (HART 5/7)
DTM (HART 7)
[Root Menu] → Detailed setup →
Signal condition → ET Setup → Fixed
ET →
DTM (HART 5) Configuration → External
Temperature Sensor →
→ ET Fixed Select “No”, “Yes” or “FALL BACK”
No: Shows process temperature
value
Yes: Fix the temperature value
FALL BACK: Fix the temperature
value when the RTD
sensor is disconnected.
→ Fixed ET
Val
Set the fixed temperature value
3.3.4 Integral Indicator Scale Setup
The following seven displays are available for
integral indicator. A cycle of up to four displays can
be shown by assigning variables to the parameters
at Disp select.
• % of PV range
• Flow rate
• Input differential pressure
• Input static pressure
• Input external temperature
• User set scaled PV
• Total flow