Yokogawa EJA440E - Manual (Page 38)

<3. Parameter Setting>
3-25
IM 01C25T01-06EN
Transmitter
L
h
0
H
(+)
● EJX118A/EJA118E
F0310.ai
h
h
L
L
H
Transmitter
Transmitter
0
(+)
(–)
● EJX438A/EJA438E
Note: When the transmitter is positioned lower than the
diaphragm seal part, the value of “h” must have a
negative sign (–).
Example: Enter K value obtained from the equation (a).
A value haivng up to 3 decimal places may be
specified.
When h=+3 m, Fill fluid code A, span=15 kPa,
K=−(+3)Ч0.00745ч15Ч100=−0.149
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Detailed setup
→ Signal condition → T.Z.
Comp menu →
EJX_HART 5[1.2]
DTM
Configuration → Pressure
Sensor →
→ Temp Zero Set the compensation value
Input “-0.149” to Temp Zero prameter.
Note 1: The function is performed using a built-in temperature
sensor in the transmitter body. The temperature
deviation between the transmitter body and capillaries
should be minimized to achieve optimal performance
of the function.
Note 2: When the span changes, reenter the newly obtained
value of K to Temp Zero.
Table A. Constant value [B] of fill fluid
Fill fluid
code
A, C,
1, 2, 4
B D E
C
on
st
an
t v
al
ue
[B
]
mmH 2 O 0.76 0.87 1.45 0.75
kgf/cm 2 0.000076 0.000087 0.000145 0.000075
kPa 0.00745 0.00853 0.01422 0.00736
mBar 0.07453 0.08532 0.14220 0.07355
atm 0.000074 0.000084 0.000140 0.000073
inH 2 O 0.02992 0.03425 0.05709 0.02953
psi 0.00108 0.00124 0.00206 0.00167
mmHg 0.05592 0.06401 0.10669 0.05518
Note 3: Select the unit of constant value of [B] from the actual
unit used for the transmitter in operation.
3.3.15 Test Output, Simulation, and Squawk
NOTE
Fixed current output, DO Test, and Device
Variable Simulation Function continue for a given
holding time, then is released automatically.
Even if the HART configuration tool power
supply is turned off or the communication cable
is disconnected, the test output will continue for
that time.
The holding time can be selected from 10 min*,
30 min, 60 min, 3 hour, 6 hour or 12 hour.
*: Default value.
• Procedure to call up the display
DD [Root Menu] → Diag/Service →
Test Auto Release Time
DTM (excluding
EJX_HART 5
[1.2])
[Root Menu] → Diag/Service →
Test → Test Auto Release Time
EJX_HART 5[1.2]
DTM
Diag and Service → Service
→ Test Auto Release Time
(1) Fixed current output
This feature can be used to output a fixed current
for loop checks. The available range for test output
depend on the settings for the AO lower limit and
AO upper limit parameters, whose limit is from
3.6mA (-2.5%) to 21.6mA (110%).
Refer to the subsection 3.3.2 about the setting of
AO lower limit and AO upper limit.
While this function works, “TEST” is displayed on
the integral indicator.
 Setting by DD and DTM (EJX HART 5 DTM
based on FDT1.2)
Call up the test output parameter (Loop test) and
select the output signal.
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Diag/Service →
Test (DTM only) → Loop test →
Display Item Contents
4mA Output a 4mA DC signal
20mA Output a 20mA DC signal
Other Set a desired output signal value
End Exit