Yokogawa EJA438 - Manual (Page 53)

IM 1C22J1-01E 9-1
9. GENERAL SPECIFICATIONS
9. GENERAL SPECIFICATIONS
9.1 Standard Specifications
Refer to GS 1C22T2-E for Fieldbus communica-
tion type marked with “
᭛
”.
᭹
Performance Specifications
See General Specifications sheet, GS 1C22J3-E.
᭹ Functional Specifications
Span & Range Limits
A
Measurement
Span
and Range
Span
Range
psi
(/D1)
8.6 to 430
–15 to 430
bar
(/D3)
0.6 to 30
kgf/cm 2
(/D4)
0.6 to 30
–1 to 30 –1 to 30
MPa
0.06 to 3
–0.1 to 3
T0901.EPS
B
Span
Range
66 to 1000
–15 to 1000
4.6 to 70 4.6 to 70
–1 to 70 –1 to 70
0.46 to 7
–0.1 to 7
Span
Range
66 to 2000
–15 to 2000
4.6 to 140 4.6 to 140
–1 to 140 –1 to 140
0.46 to 14
–0.1 to 14
EJA438W
EJA438N
Measurement range is within the flange rating.
Zero Adjustment Limits:
Zero can be fully elevated or suppressed, within
the Lower and Upper Range Limits of the capsule.
External Zero Adjustment “
᭛
”:
External zero is continuously adjustable with
0.01% incremental resolution of span. Span may
be adjusted locally using the digital indicator with
range switch.
Output “
᭛
”:
Two wire 4 to 20 mA DC output with digital
communications, linear or square root program-
mable. BRAIN or HART FSK protocol are superim-
posed on the 4 to 20 mA signal.
Failure Alarm:
Output status at CPU failure and hardware error;
Up-scale: 110%, 21.6 mA DC or more (standard)
Down-scale: –5%, 3.2 mA DC
Note: Applicable for Output signal code D and E
Damping Time Constant (1st order):
The sum of the amplifier and capsule damping
time constant must be used for the overall time
constant. Amp damping time constant is adjustable
from 0.2 to 64 seconds.
Time Constant (approx. sec) 0.4
A and B
T0902.EPS
Capsule (Silicone Oil)
When the capillary length 3 m and the fill fluid code
A.
Ambient Temperature Limits:
* Safety approval codes may affect limits.
–40 to 60
°
C (–40 to 140
°
F),
–30 to 60
°
C (–22 to 140
°
F) with LCD Display
Note:The ambient temperature limits must be within the
fill fluid operating temperature range, see Table 1.
Process Temperature Limits:
* Safety approval codes may affect limits.
See Table 1.
Working Pressure Limits:
2.7 kPa abs {20 mmHg abs} to flange rating
pressure.
For atmospheric pressure or below, see Figure 1.
᭹
Installation
Supply & Load Requirements “ ᭛ ”:
* Safety approvals can affect electrical requirements.
See Section 5.6, ‘Power Supply Voltage and Load
Resistance.’
EMC Conformity Standards: ,
For EMI (Emission): EN55011, AS/NZS 2064 1/2
For EMS (Immunity): EN50082-2
Communication Requirements “ ᭛ ”:
BRAIN
Communication Distance;
Up to 2 km (1.25 miles) when using CEV polyethyl-
ene-insulated PVC-sheathed cables.
Communication distance varies depending on type
of cable used.
Load Capacitance;
0.22
µ
F or less (see note)
Load Inductance;
3.3 mH or less (see note)
Input Impedance of communicating device;
10 k
Ω
or more at 2.4 kHz.
Note: For general-use and Flameproof type.
For Intrinsically safe type, please refer to
‘Optional Specifications.’
HART
Communication Distance;
Up to 1.5 km (1 mile) when using multiple twisted
pair cables. Communication distance varies
depending on type of cable used.
Use the following formula to determine cable
length for specific applications:
L= -
65 x 10 6
(R x C)
(C
f
+ 10,000)
C
Where:
L = length in meters or feet
R = resistance in
Ω
(including barrier resistance)
C = cable capacitance in pF/m or pF/ft
C
f
= maximum shunt capacitance of receiving
devices in pF/m or pF/ft