General
Specifications
<<Contents>> <<Index>>
EJX430A
Gauge Pressure Transmitter
Yokogawa Electric Corporation
2-9-32 Nakacho, Musashino-shi, Tokyo, 180-8750 Japan
Phone: 81-422-52-5690 Fax.: 81-422-52-2018
GS 01C25E01-01E
GS 01C25E01-01E
©Copyright Feb. 2004
4th Edition Jan. 2005
The high performance gauge pressure transmitter
EJX430A features single crystal silicon resonant
sensor and is suitable to measure liquid, gas, or
steam pressure. The EJX430A outputs a 4 to 20 mA
DC signal corresponding to the measured pressure. It
also features quick response, remote setup and
monitoring via BRAIN or HART communications, and
self-diagnostics. FOUNDATION Fieldbus protocol type
is also available.
All EJX series models in their standard configuration,
with the exception of the Fieldbus type, are certified by
TÜV as complying with SIL 2 for safety requirement.
STANDARD SPECIFICATIONS
Refer to GS 01C25T02-01E for Fieldbus communica-
tion type marked with “.”
SPAN AND RANGE LIMITS
Measurement
Span/Range
H
A
B
2.5 to 500 kPa
– 0.1 to 3.5
–1 to 160
Span
Span
Span
Range
Range
Range
MPa
10 to 2000 inH
2
O
–400 to 2000 inH
2
O
–14.5 to 500
2.5 to 500
–100 to 500 kPa
0.0175 to 3.5
0.08 to 16
– 0.1 to 16
psi (/D1)
12 to 2300
–14.5 to 2300
bar(/D3)
0.025 to 5
–1 to 35
–1 to 5
0.175 to 35
0.8 to 160
–1 to 160
kgf/cm
2
(/D4)
0.025 to 5
–1 to 5
0.175 to 35
–1 to 35
0.8 to
1
60
T01E.EPS
PERFORMANCE SPECIFICATIONS
Zero-based calibrated span, linear output, wetted
parts material code ‘S’ and silicone oil, unless
otherwise mentioned.
For Fieldbus communication type, use calibrated
range instead of span in the following specifications.
Specification Conformance
EJX series ensures specification conformance to at
least ⫾3.
Reference Accuracy of Calibrated Span
(includes the effects of terminal-based linearity,
hysteresis, and repeatability)
Measurement span
Reference
accuracy
⫾0.04% of Span
⫾(0.005⫹0.0049 URL/Span)% of Span
H
T03E.EPS
X
X ⬎ span
X ⱕ span
URL (upper range limit)
70 kPa (280inH
2
O)
500 kPa (2000inH
2
O)
Measurement span
Reference
accuracy
⫾0.04% of Span
⫾(0.005⫹0.0035 URL/Span)% of Span
T02E.EPS
X
X ⬎ span
X ⱕ span
URL (upper range limit)
A
0.35 MPa
(50 psi)
1.6 MPa
(230 psi)
3.5 MPa
(500 psi)
16 MPa
(2300 psi)
B
Ambient Temperature Effects per 28˚C (50˚F)
Change
Capsule Effect
H ⫾(0.04% Span⫹0.0125% URL)
A, B ⫾(0.04% Span⫹0.009% URL)
Stability (All normal operating condition)
⫾0.1% of URL per 10 years
Power Supply Effects (Output signal code D and E)
⫾0.005% per Volt (from 21.6 to 32 V DC, 350 ⍀)
Vibration Effects
Less than 0.1% of URL when tested per the require-
ments of IEC60770-1 field or pipeline with high
vibration level (10-60 Hz, 0.21 mm peak to peak
displacement/60-2000 Hz 3g)
Mounting Position Effects
Rotation in diaphragm plane has no effect. Tilting up
to 90 degree will cause zero shift up to 0.4 kPa (1.6
inH
2
O) which can be corrected by the zero adjust-
ment.
Response Time (All capsules) “”
95 msec
When software damping is set to zero and including
dead time of 45 msec (nominal)
FUNCTIONAL SPECIFICATIONS
Output “”
Two wire 4 to 20 mA DC output with digital communi-
cations, linear or square root programmable. BRAIN
or HART FSK protocol are superimposed on the 4 to
20 mA signal.
Output range: 3.6 mA to 21.6 mA
Output limits conforming to NAMUR NE43 can be
pre-set by option code C2 or C3.
Failure Alarm (Output signal code D and E)
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 or less