EJX120A EJX120A微差压变送器

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EJX120A型高性能微差压变送器采用单晶硅谐振式传感器技术，适用于液体、气体或蒸汽的流量以及液位、密度和压力测量。

多传感器技术提供的诊断功能，可以检测脉冲线路堵塞或伴热管道的破损等异常。

EJX系列支持BRAIN、HART和FOUNDATION™现场总线通信协议。

规格

EJX120A微差压变送器

E膜盒

测量范围

-1~1kPa(-4~4inH2O)

测量量程

0.025~1kPa(0.1~4inH2O)

精度

±0.09%

防护等级

IP67，NEMA 4X和JIS C0920防浸型

防爆规格

FM，CENELEC ATEX，CSA，IECEx

输出信号

4~20mA DC或FOUNDATION™ 现场总线，两线制数字通信

电源

BRAIN和HART: 10.5~42V DC

(本安型: 10.5~30V DC)

Fieldbus: 9~32V DC

(本安Entity模式9~24V DC，本安FISCO模式9~17.5V DC)

环境温度

-25~80℃ (-13~176℉) (普通型)

过程温度

-25~80℃ (-13~176℉) (普通型)

zui大工作压力

50kPa(7.25psi)

安装

2-inch管安装

接液部件材质

膜盒

316L SST(膜片: 哈氏合金C-276)

容室法兰

ASTM CF-8M

外壳

铝合金或ASTM CF-8M不锈钢(可选)

n  产品选型

产品系列

型号代码

描述

EJX120A

. . . . . . . . . . . . . .

差压变送器

输出信号

-D . . . . . . . . . . . .

-E . . . . . . . . . . . .

-F . . . . . . . . . . . . 

4-20mA 信号输出（BRAIN协议）

4 to 20 mA DC with digital communication (HART protocol)

Digital communication (FOUNDATION Fieldbus protocol, refer to GS 01C25T02-01EN)

测量范围（压力）

E . . . . . . . . . . . .

0.025 to 1 kPa (0.1 to 4 inH2O)

部件材料*2

¨ . . . . . . . . . .

Refer to “Wetted Parts Material” Table below.

过程连接

►

0 . . . . . . . . . . . . . . . .

1 . . . . . . . . . . . . . . . . . . . . . .

2 . . . . . . . . . . . . . . . . . . . . . .

3 . . . . . . . . . . . . . . . . . . . . . .

4 . . . . . . . . . . . . . . . . . . . . . .

5 . . . . . . . . . . . . . . . . . . . . . .

无过程连接

(Rc1/4 female on the cover flanges) with Rc1/4 电气过程连接

with Rc1/2 电气过程连接

with 1/4 NPT 电气过程连接

with 1/2 NPT 电气过程连接

无过程连接 (1/4 NPT female on the cover flanges)

螺栓和螺母的材料

J . . . . . . . .

G. . . . . . . . .

C. . . . . . . . .

B7 carbon steel

316L SST

660 SST

Installation

►

-7 . . . . . . . . . . . . . .

-8 . . . . . . . . . . . . . .

-9 . . . . . . . . . . . . . .

-U . . . . . . . . . . . . . .

Vertical piping, left side high pressure, and process connection downside

Horizontal piping and right side high pressure

Horizontal piping and left side high pressure

Universal flange

Amplifier housing

1 . . . . . .

3 . . . . . . . . . . . . .

2 . . . . . .

Cast aluminum alloy

Cast aluminum alloy with corrosion resistance properties*5

ASTM CF-8M stainless steel*3

电气连接

►

0 . . . . .

2 . . . . . . . . . . .

4 . . . . . . . . . . .

5 . . . . .

7 . . . . . . . . . . .

9 . . . . .

A. . . . . . . . . . .

C. . . . . . . . . . .

D. . . . . . . . . . .

G1/2 female, one 电气连接 without blind plugs

1/2 NPT female, two 电气连接s without blind plugs M20

female, two 电气连接s without blind plugs G1/2 female, two

电气连接s and a blind plug*4

1/2 NPT female, two 电气连接s and a blind plug*4 M20 female,

two 电气连接s and a blind plug*4

G1/2 female, two 电气连接s and a SUS316 blind plug

1/2 NPT female, two 电气连接s and a SUS316 blind plug M20

female, two 电气连接s and a SUS316 blind plug

显示面板

►

D. . . .

E . . . .

N. . . .

Digital indicator

与范围设定开关数字指示器*1

None

Mounting bracket ►

B. . . . . .

D. . . . . .

J . . . . . .

K. . . . . .

N. . . . . .

304 SST 2-inch pipe mounting, flat type (for horizontal piping)

304 SST 2-inch pipe mounting, L type (for vertical piping)

316 SST 2-inch pipe mounting, flat type (for horizontal piping)

316 SST 2-inch pipe mounting, L type (for vertical piping)

None

Optional Codes

¨/ 可选范围

The “►” marks indicate the most typical selection for each specification.

*1: Not applicable for 输出信号 code F.

*2: Users must consider the characteristics of selected 部件材料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.

*3: Not applicable for 电气连接 code 0, 5, 7 and 9.

*4: Material of a blind plug is aluminum alloy or 304 SST.

*5: Not applicable for 电气连接 code 0, 5, 7, 9 and A. Content rate of copper in the material is 0.03% or less and content rate of iron is 0.15% or less.

Table. Wetted Parts Materials

部件材料code

Cover flange and process connector

Capsule

Capsule gasket

Drain/孔塞

S #

ASTM CF-8M *1

哈氏合金 C-276 *2 (Diaphragm) F316L SST (Others)

PTFE Teflon

316 SST

*1: Cast version of 316 SST. Equivalent to SCS14A.

*2: 哈氏合金 C-276 or ASTM N10276.

*3: 316L SST, F316L SST.