- 美国 MONITOR SFD-2 微波固体流量计
详细信息
品牌:美国 MONITOR 型号:SFD-2 加工定制:是 类型:微波流量计 测量范围:25 m3/h 精度等级:5% 公称通径:300 mm 适用介质:气固两相流 工作压力:2 MPa 工作温度:70 ℃ 品牌:MONITOR
名称:MONITOR SFD-2 微波固体流量开关
简介:MONITOR SFD-2和SFI的标准配置都包括一个特氟龙的密闭窗口,信号通过该窗口进出传感器。特氟龙这种介质应用范围广泛,适合应用在高压或研磨性的介质中。供电/调试模块的外壳(仅限SFD-2):标准配置的SFD-2不提供供电调试模块的外壳, 当选择配置NEMA4X的外壳时,供电/调试模块被安装在一个6*6*4”的玻璃纤维壳体没,在壳体外表面配耐用的LED闪示灯。
MONITOR SFD-2 微波固体流量开关可以应用在各种场合来检测粉末、固体颗粒的流动/非流动状态。
以下是微波固体流量计的主要特点:
● 流动固体状态的*佳检测方法
● 功能齐全、性能卓越
● 高灵敏度
● 显示卸料器、进料器及管道中,固体颗粒的流动/不流动状态
● 流量开/关状态监测器(SFD-2)
● 已通过危险场合的使用认证
● 可监测各种轻/重材料,小/大固体颗粒
● 透过多数非金属表面对介质的流动状态进行非接触监测
● 非插入式快速安装,不与被测介质直接接触
● SFD-2可以提供继电器输出和便捷的电子遥控MONITOR 微波固体流量开关的技术参数如下:
MONITOR SFD-2 微波固体流量开关的订货选型如下:
Microwave Solids Flow Monitors -
Models SFD-2 & SFI
Senses Light And Heavy Materials, Small And Large Particles
Non-Contact Sensor Detects Flow Through Most Non-Metallic Surfaces
Non-Intrusive Flush Mounting. No Probe Protruding Into Material Flow
SFD-2 Provides Relay Outputs and Convenient Remote Electronics
SFI Solids Flow Indicator Provides Variable Analog Signal
Sensors Include CSA Class II, Division I Approval for Hazardous Locations
Solids Flow Monitors
Monitor's line of microwave solids flow monitors are high quality, industrial grade instruments capable of providing a signal indicating the flow/no-flow condition of solids and powders in gravity chutes, feeders and pneumatic pipelines. The Model SFD-2 Solids Flow Detector provides relay outputs that can be setup to indicate changes in the target flow stream (on/off). The Model SFI Solids Flow Indicator provides an analog output which varies with changing conditions of the material flow stream. These non-contact monitors contain no moving parts or probes that can wear out or break off in the material flow, thus ensuring process integrity.
The SFD-2 and SFI use low power microwaves to sense motion within the chute or pipeline being monitored. Microwaves are virtually unaffected by ambient noise and light, heat, humidity, pressure, vacuum, high or low temperatures or dust. This provides maximum effectiveness in typical industrial application environments. These advantages over sonic or mechanical flow monitors make microwave technology the best choice for solids flow monitoring.
.: Principle of Operation .: Applications .: Features .: Options .: Accessories .: Specifications .: Warranty Principle of Operation
Both the SFD-2 and SFI utilize a microwave transceiver (combination transmitter/receiver) enclosed within a watertight, dust-ignition proof powder coated aluminum housing with a screw-on/off cover. A process seal (Teflon® or Ryton®) acts as a transparent window through which the microwave energy is transmitted and the reflected return signal is received. The transceiver module generates and transmits a microwave signal into the area where material flow is to be monitored. The reflected microwave signal shifts in accordance with the Doppler Effect phenomena. The Doppler-shifted energy is analyzed to determine the appropriate output from the unit.
The SFD-2 has a split-architecture design consisting of the transceiver and a separate power supply/conditioning circuit board. The relays are incorporated on the power supply/conditioning circuit board, which is optionally available with a fiberglass enclosure and indicating lights. With the SFD-2, the Doppler-shifted energy signal from the transceiver is carried back to the power supply/conditioning circuit board through the user-supplied signal and power supply cable. At the power supply/conditioning circuit board the signal intensity is indicated with an LED and converted into a relay output based upon the sensitivity adjustment. The power supply/conditioning circuit board provides the power to drive the transceiver and contains the controls for setting sensitivity, hold-off time delay, hold-on time delay and fail-safe selection.
The SFI Solids Flow Indicator, unlike the SFD-2, consists solely of a transceiver. In this case the transceiver will receive its DC power through the user supplied signal cable and power supply. The three-wire design allows the user to monitor the analog output while providing the supply power to the unit. The Doppler-shifted energy is relative to the magnitude of the flow/no-flow condition that exists, when material velocity is constant, and this is reflected in the varying analog output signal.
Applications
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Monitor's Solids Flow Detector and Indicator can be used in a variety of applications to detect flow/no-flow conditions of powders and solid materials. The selection of either SFD-2 Solids Flow Detector or the SFI Solids Flow Indicator is based upon the type of output required (relay or analog).
Detection of a partial or full plug in a conveying line
Detecting the bridging of material in a storage vessel upstream
Sensing inadequate or a lack of flow due to upstream equipment failure (conveyor, blower, diverter valve, feeder)
Verifying flow conditions
Turning on/off equipment or processes downstream
Use of SFI Analog Outputt
The Model SFI Solids Flow Indicator can be used to infer the relative amount of flowing material within the target conduit (by monitoring the available analog signal). However, it should be noted that this device provides an output that should be considered, at best, a very rough estimate of the flow of material. The analog signal corresponds to the magnitude of the Doppler-shifted energy created by the flow of material through the microwave energy field.
Note: Monitor Technologies LLC accepts no responsibility for the accuracy of the analog output signal. This signal can be influenced by several varying factors including, but not limited to, particle size distribution, dielectric constant variation, moisture content variation, dispersion of material flow, variation in velocity of material flow, movement of auxiliary equipment, temperature variations and type of conveying system. Please consult the factory to discuss applications where the accuracy of the analog output is of importance.
Pictured at the right is a SFI installed in a plant that manufactures ink for desktop printers and copy machines. 100-pound batches of carbon black come out of a feeder and are pneumatically conveyed through a four-inch vertical line. The SFI is used to indicate when a batch of carbon black has cleared the line.
Features
TRANSCEIVER (SENSOR) Powder coated NEMA 4 cast aluminum construction
Approved for Class II hazardous areas
Meets applicable FCC regulations
Screw-on/off cover
Teflon® process seal is standard
15-30VDC/Analog three-wire input/output (SFI only)
CIRCUIT BOARD (SFD-2 ONLY) Connects to transceiver using an inexpensive, low voltage 3-wire system
Convenient control functions for time delay, sensitivity and fail-safe selection
Control function changes can be made without accessing the transceiver
Yellow and Red LEDs indicate material flow intensity and output activation
Options
RYTON® PROCESS SEAL
Both the SFD-2 and SFI come standard with a Teflon® process seal window through which the transmit/receive signal passes. While this material is compatible with most applications, a Ryton® seal is available for use in applications where the seal is subjected to high pressure or abrasive materials.ENCLOSURE FOR CIRCUIT BOARD (SFD-2 only)
The standard SFD-2 does not provide an enclosure for the power supply/conditioning circuit board. This allows the user to install the board wherever is appropriate. A NEMA 4X enclosure is available. When selected, the power supply/conditioning circuit board is supplied installed within a fiberglass enclosure furnished with long-lasting LED indicators flush with the enclosure face.Left: Power Supply/Conditioning Circuit Board
Right: Optional EnclosureAccessories
GALVANIZED HALF-COUPLING
Monitor provides a galvanized half-coupling which can be welded to the chute or pipe for mounting the transceiver. Half Coupling: P/N 17-3111LOCKNUT
The optional locknut provides flexibility in the depth of the mounting of the transceiver to ensure that the process seal is flush with the inside of the conduit in which the target material flows. Lock Nut: P/N 17-3000-7CSADDLE COUPLING
The saddle coupling provides a means of mounting the transceiver without welding a mounting coupling. The saddle coupling, which includes a gasket, is suitable for round chutes 4-10" (102-254mm) in diameter and can be easily clamped to the chute or pipeline. Saddle Coupling: P/N 17-3102-1STAINLESS STEEL ADAPTERS
Four different mounting adapters can be used to provide a stainless steel process contacting surface. The adapter can be of either 1-1/2" NPT or Tri-Clamp® food grade construction.
1-1/2" NPT: P/N 17-3303-1 (Teflon® seal) P/N 17-3303-3 (Ryton® seal)
Tri-Clamp: P/N 17-3305-1 (Teflon® seal) P/N 17-3305-3 (Ryton® seal)Specifications
TRANSCEIVER (SENSOR) Power Requirement: SFD-2: Provided by power supply/conditioning PCB SFI: 15-30VDC, 100mA max. Enclosure: Die-cast aluminum, beige polyester powder coated Enclosure Protection: NEMA 4, IP66 Ambient Operating Temperature: SFD-2: -40° to +185° F (-40° to +85° C) SFI: -13° to +185� F (-25� to +85� C) Process Temp. Max: 250°F (121°C) if ambient air temp. below 150°F (65°C) Process Seals: TFE Teflon®, Ryton® Pressure Ratings: TFE Teflon® (75 PSI intm), Ryton® (300 PSI) Process Connection: 1 1/4" NPT (1-1/2” w/ SS Adapter) Conduit Connection: (2) 1/2" NPT Detection Range: 0 to 10' free air, env. and target dependent Sensitivity: Switch selectable HI/LOW Minimum Velocity: 2.5 ft/sec (762mm/sec) Output: SFD-2: None, signal from transceiver is delivered to and processed by power supply/conditioning circuit board SFI: 4-20mA output typical (full span may not be achieved; actual span is application dependent) Isolation (SFIOnly): 750 VPK isolation between sensor ground and user power supply/analog supply Indicators: Green LED – power; Yellow LED Ðloop, intensifies with disturbance detected Emission: 24.125 GHz, FCC & IC certified, energy levels less than 1mW/cm(2) (OSHA limit at 10mW/cm(2)) Approvals: CSA(us/c), Class II Div. 1 & 2 Groups E, F & G
CE Mark (Ordinary Location)
POWER SUPPLY/ CONDITIONER BOARD (SFD-2 ONLY) Enclosure (if supplied): PBT/Polycarbonate Enclosure Protection: NEMA 4X, IP66 Ambient Operating Temperature: -40°F to 158°F (-40°C to 70°C) Interconnection Distance: 2500ft max (minimum wire size 22 AWG) Power: Universal 100-240 VAC, + 10%, 50/60 HZ Power Consumption: 5 VA max Output: DPDT dry contact, 5A @ 240VAC, 30 VDC External lights (if applicable): Solid state LED clusters
Yellow – material sense; Red – output operateSensitivity Adjustment: Single-turn adjust 0 to 100% of sensor range Time Delay: Hold-off, single-turn adjustment, 0.25 to 15 sec.
Hold-on, single-turn adjustment, 0.25 to 15 sec.Fail-Safe: Switch selectable, (Flow/No-Flow) Indicators: Green LED - power; Yellow LED - sense; Red LED - output Approvals: CSA(us/c), ordinary locations, industrial control equipment
CE Mark (ordinary locations)Ryton® - Trademark of Phillips Chemical Co.
Teflon® - Trademark of Dupont Chemical Co.
Tri-Clamp® - Trademark of Tri-Clover, Inc.Warranty
Monitor Technologies LLC warrants each SFD-2/SFI it manufactures to be free from defects in material and workmanship under normal use and service within two (2) years from the date of purchase. The purchaser must give notice of any defect to Monitor within the warranty period, return the product intact and prepay transportation charges. The obligation of Monitor Technologies LLC under this warranty is limited to repair or replacement at its factory. This warranty shall not apply to any product which is repaired or altered outside of the Monitor Technologies LLC factory, or which has been subject to misuse, negligence, accident, incorrect wiring by others or improper installation. Monitor Technologies LLC reserves the right to change the design and/or specifications without prior notice.
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