3000MR/3000MRS系列 Photohelic 微差压开关/表-德威尔Dwyer
3000MR 3000MRS Photohelic® 开关/表把高精度、高重复性能的差压开关与大表盘便于读数的指针式差压表结合到一起，采用了可靠耐用的的Magnehelic®设计理念。可通过仪表面板的旋钮设置压力开关设定点，压力表读数不受开关的影响，即使失电也能准确读数。采用了固态技术大大减小了产品的体积和重量。可在13/16″(122mm)安装孔中被嵌入安装或用带有的附件进行表面安装。3000MR型采用了镀金触头开关，特别适用于小功率无源电路。对于开关动作频繁的应用场合，可选择带单刀单掷（常开）固态开关的3000MRS。有高低位开关，带18英寸（45cm）长的电缆用于电气连接。
3000MR 3000MRS Photohelic® 差压表的精度是±2%， 开关的重复精度是±1%，回差小于1%，比指针的宽度还窄。它可用于空气或其它不可燃，无腐蚀的气体，耐压到25psig(1.725bar)。有耐压35 psig(2.42bar)或耐压80 psig (5.51bar)的特别结构选项。
包括附件：安装环，卡环，18" (45 cm)电缆，两个3/16"软管到1/8"NPT转换接头，2个1/8"NPT堵头，4个6-32 x 1-1/4"盘装用螺钉，3个6-32 x 5/16"表面安装用螺钉。
GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±2% of FS (3000-0 ±3% of FS). (3000-00 ±4% of FS).
Pressure Limit: -20" Hg. to 25 psig (-0.677 bar to 1.72 bar). MP option: 35 psig (2.41 bar), HP option: 80 psig (5.52 bar).
Temperature Limits: 20 to 120°F (-6.67 to 48.9°C).
Process Connections: 1/8" female NPT (duplicated side and back).
Size: 4" (101.6 mm) dial face, 5" (127 mm) OD x 3-1/8" (79.38 mm).
SWITCH SPECIFICATIONS 3000MR
Switch Type: Each setpoint has 1 form C relays (SPDT).
Relay Contacts: (Resistive load) 1 form C rated 1.0A @ 30 VDC, 0.3A @ 110 VDC or 0.5A @ 125 VAC. Gold over clad silver - suitable for dry circuits.
Electrical Connections: 18" (46 cm) cable assembly with 8 conductors. Optional lengths to 100' (30.5 m).
Power Requirements: 24 VDC, regulated ±10%.
Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations.
Set Point Adjustment: Adjustable knobs on face.
SWITCH SPECIFICATIONS 3000MRS
Switch Type: Each setpoint has a solid state relay.
Switching Voltage: 20-280 VAC (47-63 Hz).
Switching Current: 1.0 amp (AC) max., 0.01 mA (AC) min., (2) SPST NO.
Electrical Connections: 18" (46 cm) cable assembly with 6 conductors, optional lengths to 100' (30.5 m).
Power Requirements: 24 VDC, regulated ±10%.
Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations.
Set Point Adjustment: Adjustable knobs on face.
Agency Approvals: CE.
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