EJA120A Micro Differential Pressure Transmitter

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EJA120A Micro Differential Pressure Transmitter

　　Yokogawa EJA120A tiny differential pressure transmitter used to measure tiny differential pressure, then transform it into a 4-20 current signal output.

Description

1、The features

　　Yokogawa EJA120A tiny differential pressure transmitter used to measure tiny differential pressure, and then transform it into a 4-20 current signal output. Yokogawa EJA120A differential pressure transmitter can communication with BRAIN hand operator or CENTUM CS/muXL or Rosemount HART 475 operator each other, through them to set and monitor, etc.

Application	Stype	Model	capsule	Measuremene (KPa)	The maximum pressure (Kpa)
Tiny Differential	Normal installation	EJA120A	E	0.1-1	50

2、Product specification

		EJA120A micro differential pressure transmitter
		Ediaphragm capsule
MeasurementRange		-1~1kPa(-4~4inH2O)
Measurement Span		0.1~1kPa(0.4~4inH2O)
Accuracy		±0.2%
Protection Level		IP67，NEMA 4X，JIS C0920 The immersion type
Explosion-proof		FM，CENELEC ATEX，CSA，IECEx
Output Signal		4~20mA DC or FOUNDATION™ fieldbus PROFIBUS PA two wire system of digital communication
Power		BRAI and HART:10.5~42V DC (intrinsic safety type: 10.5~30V DC) Fieldbus:9~32V DC (intrinsic safety typeEntitym model9~24V DC，intrinsic safety typeFISCO model9~17.5V DC)
Environment Temperature		-25~80℃(-13~176℉)
Process Temperature		-25~80℃(-13~176℉)
Maximum Pressure		50kPa (7.25psi)
Installation		2-inchflange installation
Walled Parts Materials	diaphragm capsule	SUS316L(HastelloyC-276)
	Cover flange	SUS316
Shell		Aluminum alloy or SUS316 stainless steel (optional)

3.Product selection table
Example：EJA120A-DES5A-92NN Differential pressure transmitter (for draft application)

Output signal

-D	4 to 20 mA DC with digital communication (BRAIN protocol)
-E	4 to 20 mA DC with digital communication (HART protocol, refer to GS 01C22T01-00E)
-F	Digital communication (FOUNDATION Fieldbus protocol, refer to GS 01C22T02-00E)

-G

Digital communication (PROFIBUS PA protocol, refer to GS 01C22T03-00E)

Measurement

span (capsule)

E	0.1 to 1 kPa {10 to 100 mmH 2O} {0.4 to 4 inH 2O} {1 to 10 mbar}

Wetted parts

material*6

S#	[Body] [Capsule] [Vent plug] SCS14A 1SUS316L 2 SUS316 *7

Process connections

0	without process connector (Rc1/4 female on the cover flanges)
1	with Rc1/4 female process connector
2	with Rc1/2 female process connector
3	with 1/4 NPT female process connector
4	with 1/2 NPT female process connector
☆5	without process connector (1/4 NPT female on the cover flanges)

Bolts and nuts material

☆A	JIS SCM435 50KPa
B	JIS SUS630 50KPa
C	JIS SUH660 50KPa

Installation

-2	Vertical impulse piping type, right side high pressure, process connector upside *3
-3	Vertical impulse piping type, right side high pressure, process connector downside *3
-6	Vertical impulse piping type, left side high pressure, process connector upside *3
-7	Vertical impulse piping type, left side high pressure, process connector downside *3
-8	Horizontal impulse piping type, right side high pressure *4
☆-9	Horizontal impulse piping type, left side high pressure *4

Electrical connection

0	G1/2 female, one electrical connection
☆2	1/2 NPT female, two electrical connections without blind plug
3	Pg 13.5 female, two electrical connections without blind plug
4	M20 female, two electrical connections without blind plug
5	G1/2 female, two electrical connections and a blind plug
7	1/2 NPT female, two electrical connections and a blind plug
8	Pg 13.5 female, two electrical connections and a blind plug
9	M20 female, two electrical connections and a blind plug

A

G1/2 female, two electrical connections and a SUS316 blind plug

C

1/2 NPT female, two electrical connections and a SUS316 blind plug

D

M20 female, two electrical connections and a SUS316 blind plug

Integral indicator

D	Digital indicator
E	Digital indicator with the range setting switch*5
☆N	(None)

Mounting bracket

☆A	SECC Carbon steel 2-inch pipe mounting (flat type)
B	SUS304 2-inch pipe mounting (flat type)
J	SUS316 2-inch pipe mounting (flat type)
C	SECC Carbon steel 2-inch pipe mounting (L type)
D	SUS304 2-inch pipe mounting (L type)

K

SUS316 2-inch pipe mounting (L type)

N

(None)

　　The ‘☆’marks indicate the most typical selection for each specification. Example: EJA120A-DES5A-92NA/

　　The ‘#’marks indicate the construction materials conform to NACE material recommendations per MR01-75. For the use ofSUS316 material, there may be certain limitations for pressure and temperature. Please refer to NACE standards for details.

　　*1：Indicates cover flange and process connector material.

　　*2：Diaphragm material is Hastelloy C-276 or ASTM N10276. Other capsule wetted parts materials are SUSF316L,SUS316L or ASTM grade 316L.

　　*3：If necessary, specify Mounting bracket code C or D.

　　*4：If necessary, specify Mounting bracket code A or B.

　　*5：Not applicable for Output signal code F and G.

　　*6：Users must consider the characteristics of selected wetted parts material and the influence of process fluids.The use of inappropriate materials can result in the leakage of corrosive process fluids and cause injury to personnel and/or damage to plant facilities. It is also possible that the diaphragm itself can be damaged and that material from the broken diaphragm and the fill fluid can contaminate the user's process fluids.Be very careful with highly corrosive process fluids such as hydrochloric acid, sulfuric acid, hydrogen sulfide,sodium hypochlorite, and high-temperature steam (150 °C [302 °F] or above). Contact Yokogawa for detailed information of the wetted parts material.

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