YOKOGAWA DPharp EJX***A Series, Руководство пользователя

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<3. Parameter Setting>
3-18
IM 01C25T01-06EN
d. User Setting of Engineering Unit and Scale

Setting by DD and DTM (EJX HART 5 DTM
based on FDT1.2)
Engr disp range parameters allow the engineering
unit and scale to be displayed. At Set Engr Unit ,
the following engineering units can be selected from
a list.
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Detailed setup
→ Display condition → Engr disp
range
→ Set Engr Unit Select the engineering unit
→ Engr LRV Lower range value
→ Engr URV Upper range value
→ Engr exp Exponents for user scale display
→ Engr point Decimal point position for user scale
display (0, 1, 2, 3 or 4)
Select the engineering unit from the list. Available
units are shown below
kPa
MPa
mbar
bar
psi
psia
mmH
2
O
mmHg
mmHgA
mmAq
mmWG
Torr
inH
2
O
inHg
inHgA
ftH
2
O
gf/cm
2
kgf/cm
2
kg/cm
2
G
kg/cm
2
A
atm
kg/h
t/h
m
3
/h
m
3
/min
l/h
l/min
kl/h
kl/min
Nl/h
Nl/min
Nm
3
/h
Nm
3
/min
ACFH
ACFM
SCFH
SCFM
GPH
GPM
m
mm
in
ft
kg/m
3
g/cm
3
At
Modify Engr Unit
parameter, user can set your
own unit also.
Up to eight alphanumeric characters, spaces or one
slashe (/) can be input at Modify Engr Unit ; only
the first six are displayed on the integral indicator.
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Detailed setup
→ Display condition → Engr disp
range →
→ Modify Engr
Unit
Set your own unit
Note that following symbols are not available:
# % & < > . * : + - , ’ ( )
The integral indicator shows “-- -- -- -- -- --” when
these symbols or more than two slashes are
entered.

Setting by EJX HART 5 DTM based on
FDT1.2
User can input the desired unit at
Engr Unit
.
• Procedure to call up the display
EJX HART 5 DTM
based on FDT1.2
Configuration →Local Display →
→ Engr Unit Set the engineering unit
→ Engr LRV Lower range value
→ Engr URV Upper range value
→ Engr exp Exponents for user scale display
→ Engr point Decimal point position for user
scale display
Available characters and symbols for Engr Unit are
the same as for Modify Engr Unit shown above.
3.3.5 Unit for Displayed Temperature
When the instrument is shipped, the temperature
units are set to “deg C” (Centigrade). Follow the
procedure below to change this setting.
When this parameter is set, it also changes the
temperature unit for Snsr temp at Process
variables and Amp temp at Temp sensor.
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Detailed setup →
Sensors → Temp sensor →
EJX_HART 5[1.2]
DTM
Configuration → Process Input →
→ Temp Unit Select the temperature unit
(deg C, deg F, Kelvin(K))
3.3.6 Sensor Trim
The transmitter is factory characterized. Factory
characterization is the process of comparing a
known pressure input with the output of each
transmitter sensor module over the entire pressure
and temperature operating range. During the
characterization process, this comparison
information is stored in the transmitter EEPROM. In
operation, the transmitter uses this factory-stored
curve to produce a process variable output (PV), in
engineering units, dependent on the pressure input.
The sensor trim procedure allows you to adjust
for local conditions, changing how the transmitter
calculates process variables. There are two ways
to trim the sensor: a zero trim and a full sensor trim.
A zero trim is a one-point adjustment typically used
to compensate for mounting position effects or
zero shifts caused by static pressure. A full sensor
trim is a two-point process, in which two accurate
end-point pressures are applied (equal to or greater
than the range values), and all output is linearized
between them.