西安特恩普自控设备有限公司
微差压表和高低限位控制的组合
产品介绍
A3000系列 Photohelic®微差压开关/表采用了可靠耐用的Magnehelic®设计理念,把高精度差压表和高重复性的差压开关组合在一起。可以测量和控制空气或其它兼容气体的正压,负压或差压。标准耐压等级为25psig(1.7bar),也可选择耐压35psig(2.4bar)或耐压80psig (5.5bar)。36000S单压型可以测量到6000 psig (413 bar)且耐压到9000psig(620bar)。两个双刀双掷的开关用于高/低限位控制。仪表盘面上的旋钮可很容易调整设定点,每个设定点的回差小于1%,比指针的宽度还窄。采用两个设定点能够锁定出不同的回差,zui适用于控制风机,风门等。差压表读数不受开关操作的影响,即使失电也不影响读数。可选的量程范围从0-0.25英寸水柱(0-6毫米水柱)到30psi(2.1bar)。
Photohelic的工作原理
当在高低设定点值之间差压变化,到某一设定点时,联动的遮光板会遮挡住射向限位晶体管的红外线光束,这样晶体管信号被放大而触发双刀双掷开关动作。
特点
采用工程塑料外壳保护所有的电子元件和线路。固态开关和电子元器件固定在环氧树脂保护的电路板上,并带阻燃接线端子排。
GAGE SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult Factory. Accuracy: ±2% of FS at 70°F (21.1°C). ±3% on -0 and ±4% on -00 models. Pressure Limits: -20" Hg. to 25 psig (-0.677 to 1.72 bar). MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar). A36003S – 36010S; 150 psig (10.34 bar). A36020S and higher; 1.2 x full-scale pressure. Temperature Limits: 20 to 120°F. (-6.67 to 48.9°C). Low temperature option available. Process Connections: 1/8" female NPT. Size: 4" (101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4" (209.55 mm). Weight: 4 lb (1.81 kg).SWITCH SPECIFICATIONS Switch Type: Each setpoint has 2 Form C relays (DPDT). Repeatability: ±1% of FS. Electrical Rating: 10A @ 28 VDC, 10A @ 120, 240 VAC. Electrical Connections: Screw terminals. Use 167°F (75°C) copper conductors only. Power Requirements: 120 VAC, 50/60 Hz; 240 VAC & 24 VAC power optional. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. Set Point Adjustment: Adjustable knobs on face. Agency Approvals: CE, CSA, UL. Optional-EXPL explosion-proof enclosure does not possess any agency approvals. |
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