YOKOGAWA DPharp EJX***A Series, Руководство пользователя

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<3. Parameter Setting>
3-16
IM 01C25T01-06EN
3.3 Detailed Setup
3.3.1 Bi-directional Flow Measurement
(a) Bi-dir mode enables selection of 50% output at
an input of 0 mmH
2
O.
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu]
→ Detailed setup →
Signal condition →
EJX_HART 5[1.2]
DTM
Configuration → Analog output →
→ Bi-dir mode Select “On” or “Off”
(b) Combining Bi-dir mode with Xfer fnctn
provides a square root output computed
independently for 0% to 50% output and for
50% to 100% output.
20 mA (100% display)
4 mA (−100% display)

Output mode “LINEAR”
LRV HRV
F0304.ai
20 mA (100% display)
Low Cut
4 mA (−100% display)

Output mode “SQUARE ROOT”
LRV HRV
3.3.2 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
3.6 mA
(0.9 V)
21.6 mA
(5.4 V)
Option code /C2 and /C3 3.8 mA
(0.95 V)
20.5 mA
(5.12 V)
( ) shows the value for 1 to 5 V output.
Output signal range can be changed between
3.6 mA and 21.6 mA (0.9 V and 5.4 V for 1 to 5 V
output) 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 and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Detailed setup →
Output condition → Analog output
→
EJX_HART 5[1.2]
DTM
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
3.3.3 Integral Indicator Display Mode
The mode setting for the output signal and the
integral indicator can be performed independently.
The output mode for the integral indicator is set
as specified in the order when the instrument is
shipped. Follow the procedure below to change the
mode.
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Detailed setup
→ Display condition → P disp
condition →
EJX_HART 5[1.2]
DTM
Configuration → Local Display
→
→ Disp Pres % fnctn Select “Linear” or “Sq root”
If the instrument is equipped with an integral
indicator and the transfer function is sq root, “ ” is
displayed on the integral indicator.