Photohelic®switch/The tables are combined with multi-function, high repetitive pressure switch and precision and time-provenMagnehelic®The designed differential pressure gauge is integrated.Photohelic®It can measure and control the positive pressure, negative pressure and differential pressure of air and compatible gases. Standard rated pressure25psig(1.7bar), Optional pressure range35psig(2.4bar)or80psig(5.5bar).36000SType can only measure single positive pressure and reach6000psig(413bar), Its rated value is9000psig(620bar).
Driven by two phototransistorsDPDTRelay for low/High limit control. The panel knob makes the set point indicator easy to adjust and control. A single set point dead zone is only one pointer width-Less than full scale1%. Set points can be interlocked to provide different dead zones-Used to control fans, dampers, etc. The reading of the meter is continuous and is not affected by the switch action, even in the case of power failure, it can be read. Range from0-.25" (0-6 mm) w.c.arrive 30 psi (21 bar); Single positive pressure to6000 psig (413bar).
PHOTOHELICSensing--working principle
Typical applications, theseDwyerswitch/The meter controls between the high and low pressure set points. When the pressure change reaches the high or low set point pressure, the infrared lamp screw-driven shutter that limits the optocoupler is extinguished. The optocoupler signal is amplified to driveDPDTThe relay produces a switching action. Dead zone is full scale1%Or smaller--Enough to ensure absolute, vibration-free work.
Relay-Characteristics of transformer
The plastic shell protects all electrical components. The solid-state integrated circuit is assembled on the epoxy glass circuit board and the automatic extinguishing terminal board.(Only forA3000series)
application--PHOTOHELICswitch/surface
Pressure Switch/The table provides you with pressure indication and high/Low limit switch control. forOEMAnd field applications,Photohelicswitch/The meter is used in air conditioning systems, clean rooms, hydraulic and pneumatic control systems, material handling equipment, alarm and control exhaust emission systems, pressure and blood flow monitoring and breathing detection for controlling gas structures.
Specification
Table specifications
medium: Air and non-flammable, compatible gas
Precision:70℉(21.1°C)When the full scale is±2%;(A3000-0At full scale±3%).(A3000-00At full scale±4%)
preset pressure:-20″Hgarrive 25 psig(-0.677bararrive1.72 bar); MPMedium voltage optional:35 psig(2.41 bar);HPHigh voltage optional:80 psig(5.52 bar). 36003S-36010S:150psig(10.34bar);36020SAnd higher:1.2Full scale pressure
temperature range:20-120℉(-6.67-48.9℃),Low temperature optional
Pressure connection: 1/8"FNPTFemale thread
size:4inch(101.6mm)Diameter dial, 5" (127 mm) O.D. x 8-1/4" (209.55 mm)
weight:4lb (1.81 KG)
Switch specifications
Switch type: Each contact has2PieceCForm relay(DPDT)
Repeatability: At full scale±1%
Power rating:10A@28VDC,10A@120,240VAC
Electrical connections:Screw terminal, only copper connector can be used167°F (75°C)
Power requirements:120 VAC, 50/60 Hz; 240 VAC& 24 VACOptional power supply
Installation position:Vertical installation,Consulting factories in other directions
Set point adjustment:The adjustment is twisted on the panel
Agency certification:UL, CSA, CE.
Standard model:
Use two phototransistors and twoDPDTRelay for high/Low alarm or limit control. When the pointer of the meter moves to the left of the set point, the current of the relay is cut off; when the pointer of the meter moves to the right of the set point, the relay will be powered on. Automatic fail-safe protection is provided for power failure or no voltage.
Options
Single contact—The right set point is used to increase or decrease the pressure.
OEMtype—Compared with other models, fewer relays and transformer components and housings can be selected, but include infrared diodes, phototransistors, shutters and setting pointers, suitable for single/Double contacts.
Remote installation of relays—The relay package can be installed remotely from the instrument, the standard length is5Feet, you can order other cable lengths you need.
Enhanced knob—Low temperature options, special scales, voltages, and other features and modifications are possible.
Special case—With all-weather rainproof shell(NEMA 4)And explosion-proof(NEMA 7 CD,9 EFG;NEC Class I,DIV 1&2,Gr C, D; Class II,DIV 1&2 Gr E,F,G; Class III). For detailed size drawings, please contact customer service
High and low self-locking circuit—Dwyer-PhotohelicPressure Switch/The meter circuit wiring can be three types: high self-locking circuit, low self-locking circuit and high-low self-locking circuit. This means that once the devices are triggered, they will remain in their respective states until they are manually reset. It is especially useful for alarm and signal applications. In this case, another alarm or signal control is used.PhotohelicPressure Switch/Table or other methods are completed. Comes with complete wiring and operating instructions. Manual reset requires a dry circuit button for exampleDwyer Part A-601.
Differential pressure switch/surface
Dial and front cover (With set point button and zero adjustment screw):Remove the dial and front cover to revealPhotothelicSet point mechanism, the front cover is transparent carbonated plastic.
Pointer and shutter: Installed on the helix and balance code. When the shutter is opened, the phototransistor is exposed to infrared rays, and the phototransistor can be covered according to the pressure used.
Shading screen: Effectively protect the phototransistor and avoid outdoor strong light. Under the cover of the shading screen, the pointer can swing freely, and the inside of the dial appears very clear and clean.
Limit switch: Reliable and long service life. Attached directly to the setting pointer, but they have been individually calibrated to ensure switching accuracy.
Flexible drive shaft: Connect with the set point knob.
Zero adjustment screw: Connect with the screws on the dial.
plastic shell: Protect electronic components and electrical connections.
Polycarbonate interface or terminal boardWith fire resistance.
Circuit board pressed on oxidized glass: Good performance and durable.
Load relay:DPDT, With self-locking feature, wide application.
electric: Its design and use50/60Hz, 110VCurrent, its voltage allows up and down10%. Special instruments can use other voltages.
Switch setting pointer: Display the position of the switch at all times.
Spring loaded friction clutch: Prevent the operator from damaging the setting mechanism.
A3000 series Photohelic and 43000 series Capsu-Photohelic pressure switch/meter |
model | Range (inch water column) | model | Range(psi) | model | Range (mm water column) | model | Measuring range (Pa) | A3000-00 | 0-0.25 | A3201 | 0-1 | *A3000-6MM | 0-6 | *A3000-60Pa | 0-60 | A3000-0 | 0-0.50 | A3202 | 0-2 | *A3000-10MM | 0-10 | A3000-125Pa | 0-125 | A3001 | 0-1.0 | A3203 | 0-3 | A3000-25MM | 0-25 | A3000-250Pa | 0-250 | A3002 | 0-2.0 | A3204 | 0-4 | A3000-50MM | 0-50 | A3000-500Pa | 0-500 | A3003 | 0-3.0 | A3205 | 0-5 | A3000-80MM | 0-80 | A3000-750Pa | 0-750 | A3004 | 0-4.0 | A3210** | 0-10 | A3000-100MM | 0-100 | Zero center range | A3005 | 0-5.0 | A3215** | 0-15 | Zero center range | A3006 | 0-6.0 | A3220** | 0-20 | *A3300-250Pa | 125-0-125 | A3008 | 0-8.0 | A3230*** | 0-30 | *A3300-20MM | 10-0-10 | *A3300-500Pa | 250-0-250 | A30010 | 0-10 | **MP medium pressure,***HP high pressure option | *A3300-30MM | 15-0-15 | model | Measuring range (kPa) | A30015 | 0-15 | Only for Capsu-Photohelic | model | Range (cm water column) | A3020 | 0-20 | A3000-1kPa | 0-1 | A3025 | 0-25 | 43230S | 0-30 | A3000-15CM | 0-15 | A3000-1.5kPa | 0-1.5 | A3030 | 0-30 | 43240S | 0-40 | A3000-20CM | 0-20 | A3000-2kPa | 0-2 | A3040 | 0-40 | 43260S | 0-60 | A3000-25CM | 0-25 | A3000-3kPa | 0-3 | A3050 | 0-50 | 43280S | 0-80 | A3000-50CM | 0-50 | A3000-4kPa | 0-4 | A3060 | 0-60 | 432100S | 0-100 | A3000-80CM | 0-80 | A3000-5kPa | 0-5 | A3080 | 0-80 | 432200S | 0-200 | A3000-100CM | 0-100 | A3000-8kPa | 0-8 | A3100 | 0-100 | 432300S | 0-300 | A3000-150CM | 0-150 | A3000-10kPa | 0-10 | A3150 | 0-150 | Photohelic--single pressure | A3000-200CM | 0-200 | A3000-15kPa | 0-15 | Only for Capsu-Photohelic | A3000-250CM | 0-250 | A3000-20kPa | 0-20 | *A36003S | 0-30 | A3000-300CM | 0-300 | A3000-25kPa | 0-25 | 43200 | 0-200 | *A36006S | 0-60 | Zero center range | A3000-30kPa | 0-30 | 43300 | 0-300 | *A36010S | 0-100 | Zero center range | 43400 | 0-400 | *A36020S | 0-200 | A3300-4CM | 2-0-2 | 43500 | 0-500 | *A36030S | 0-300 | A3300-10CM | 5-0-5 | A3300-1kPa | 0.5-0-0.5 | Zero center range | *A36060S | 0-600 | A3300-30CM | 15-0-15 | A3300-3kPa | 1.5-0-1.5 | *A36100S | 0-1000 | Special purpose range Dial model: 3401, square root, special range Scale model: 3402: blank scale, special range Model: A3000-00N, Range: -.05~ +2.0 inches of water column for indoor pressure monitoring. | *A3300-0 | 0.25-0-0.25 | *A36300S | 0-3000 | *A3301 | 0.5-0-0.5 | *A36600S | 0-6000 | A3302 | 1-0-1 | model (Need Pitot tube) | Range (inch water column) Air volume (F.P.M)
| A3304 | 2-0-2 | Precautions: If this use is consistent with the UL specifications for parts that are not listed, then the standard 3000 Photohelic switch/meter can be used in an insurance laboratory equipped with an industrial control panel. | A3310 | 5-0-5 | *A3000-00AV | 0-.25/300-2000 | A3320 | 10-0-10 | *A3000-0AV | 0-.50/500-2800 | A3330 | 15-0-15 | *A3001AV | 0-1.0/500-4000 | All ranges less than or equal to 0.5 inch water column(Or equivalent in metric units)All are calibrated and the dial can be used in the vertical position. | | | *A3002AV | 0-2.0/1000-5600 | | | *A3010AV | 0-10/2000-12500 | Options and accessories: options as a suffix, such as: A3001 -SR, single contact(set point)---------- -OLS, OEM type---------------- -RMR, remote installation of relays -TAMP, to prevent collision button -MP, medium pressure; -HP, high pressure; -LT, low temperature(-20℉); A-601, manual reset switch. |
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