Rota-Sonde DC4000-L. Laser pointer for easy alignment. Remote control of the sensitivity

Transcription

1 Scanning HOT METAL DETECTOR Rota-Sonde DC4000-L Two sensitivity ranges : 400 C and 230 C Laser pointer for easy alignment Remote control of the sensitivity Self-monitoring ISO 9001

2 Applications Benefits of Easy alignment of the sensor with integrated laser pointer Assured detection regardless of the transverse position of the product Precise detection thanks to the narrow lateral field Reliable detection even in the presence of steam or dust thanks to the small analysing beam Photosensitive cell that best suits application in rolling mills, despite scale and steam Very low maintenance, virtually nil in some cases Rota-Sonde D 4000-L Applications The is a scanning hot metal detector for continuous caster and rolling mill applications, offering two sensitivity ranges and two self-monitoring functions. The high sensitivity range enables detection of steel product at a temperature as low as 230 C. In this way, the is convenient for all hot metal detection applications in the Steel Industry and its self-monitoring facility optimises preventive maintenance. Examples of applications The is perfectly suitable for all detection applications of low-temperature rolled product or low emissivity materials such as hafnium. It is also convenient for applications where a change in the process or material leads to major variations in the temperature of the product or its emissivity, as after quenching, or for special steels, etc... If the apparent temperature of the material is uncertain during the design stage, the choice of the sensitivity range of the can be left to the time when it is commissioned. 2

3 Description Presentation The is a scanning sensor, which is sensitive to the infrared radiation emitted by hot products. It is a self-contained detector including : An optoelectronic case with a protecting hood of the viewing port and a connector. A cooling plate with an adjustable mounting stand. Because of its design and particularly its cast aluminium case, the is specially adapted for the harsh environment of the Steel Industry (shocks, vibrations, heat, vapour and dust). Operating principle 1. Scanning system The detection field is scanned by a rotating polygonal mirror which reflects the infrared radiation from the product to the photocell. Because of the exclusive optical scanning principle, the offers the following advantages : Easy alignment and reliable detection, regardless of the transverse position of the product, thanks to the large vertical field angle. Accurate detection because of the narrow lateral field. Reliable detection due to the small analysing beam. All these features give accurate and reliable detection, whatever the dimensions and the temperature of the product, or ts distance and its position in the scanned field. 2. Photosensitive cell The is fitted with a special photosensitive cell, the best compound for detection of metal, even at a temperature as low as 230 C (455 F). 3

4 Special features Mechanics The is enclosed in a sealed cast aluminium case. A hood to protect the window glass is fitted with an air-jet facility to blow a vertical air curtain in front of this glass; the protective hood can be hinged down to clean the window. The case is mounted on a cooling plate including a stainless steel pipe and fixed to a mounting stand, adjustable in two axes. The water and air purging connections are on the support plate. In this way it is possible to remove the sensor without first disconnecting the water and air supplies and without need of optical re-alignment. Electronics Sensitive photocell with a better detectivity factor at low temperatures and in the presence of water vapour. Two sensitivity ranges with remote selection. Laser pointer for easy alignment. Case mounting connector and mating connector fitted with high temperature cable. Plug-in circuit. Control panel behind a hinged cover and including : - Two sensitivity setting potentiometers (one for each range). - A TEST button to control a built-in lamp for simulation of the presence of hot product in the field and to switch on the laser pointer. - A three-colour LED : Green : product absent Red : product present Orange : cell signal saturated Off : alarm Self monitoring functions In order to optimise preventive maintenance and to improve reliability, the offers self monitoring functions including : Monitoring of the excessive internal temperature (limit of 55 C / 130 F) indicating a fault in the cooling system. Monitoring of the photocell signal to indicate dirt on the window or incorrect sensitivity setting. Alarm indicating power supply or scanning defect. 4

5 Technical characteristics Optics Model DC4010-L DC4030-L DC4050-L Scanning angle Response time 1 ms 2 ms 4 ms Horizontal angle Adjustable max : 3 Spectrum sensitivity 1 to 3 µm with maximum sensitivity at 2.2 µm Temperature range > 400 C (750 F) for normal sensitivity range > 230 C (445 F) for high sensitivity range When the temperature of the material is high, it is not suitable to use the high sensitivity range, otherwise scale or hot mechanical parts of the roll table could be detected. The scanning angle is determined according to the field of detection required for the application. It can be reduced with optional shutters. Optimum distance between the sensor and various products (depending on the temperature) Wire 5 to 10 mm 0.05 to 2 m Strip 0.60 to 2 m Bars 10 to 40 mm 0.10 to 4 m Wide strip 1.00 to 6 m Billet and small beam 0.50 to 6 m Heavy plate 1.00 to 8 m Bloom Over 2 m Slab Over 2 m Electrical and other characteristics 220 V (-10%) to 240 V (+10%) - 50/60 Hz or Operating voltage 110 V (-10%) to 120 V (+10%) - 50/60 Hz or 24 V DC (±10%) or 24 V (±10%) - 50/60 Hz Power consumption 30 VA < 600 ma Static output Relay output Alarm output Control output Signal level output Laser pointer Connection - Cable Protecting rating Operating ambient temperature Weight Push-pull outputs Low impedance: 0 / 24 V ma Single pole changeover Switching capacity : 550 VA V - 5 A max Closing time : 7.5 ms; Opening time : 3 ms Push-pull output - Low impedance: 0 / 24 V ma - 0 V : when the diagnostic system detects a defect in the power supply, internal temperature, or scanning motor speed V : when none of these defects occurs. Push-pull output - Low impedance : 0 / 24 V ma - 0 V : when the product detection begins to become difficult due to an accumulation of dirt on the viewing glass window (signal on the photocell near to the sensitivity threshold) V : when the viewing window glass is clean. 0 / 15 V, analogue voltage proportional to the cell signal Class 2, 1mW, red The pointer is operated with the test button Connector fitted with silicone cable with protective steel braid Standard length of 2 m (other length : 3, 5 or 8 m) IP 66 (cast aluminium case) -20 C to 60 C (0 F to 140 F) without water-cooling. Over 60 C ( 140 F), the sensor must be cooled with industrial quality water at about 25 C (77 F), 1-2 bar and 1-2 l/min 7 kg Laser Class 2 5

6 Technical characteristics Connection Dimensions AC supply DC4010-L and DC4030-L DC supply DC4050-L 1 Air supply Ø 10 3 Mounting with screw Ø 12 5 Optical Center 2 Water supply Ø 10 4 Laser Pointer Reference for order Rota-Sonde DC4 0 0-L Scanning angle 1 : 10 angle 3 : 30 angle 5 : 50 angle E.g.: DC4010-L 230VAC Supply voltage 115 VAC 230 VAC 24 VAC 24 VDC DELTA Tel Fax : info@deltasensor.eu - DELTA Sensor (China) Tel: Fax: info@deltasensor.com.cn DELTA Vertriebsgesellschaft mbh (Germany) Tel: Fax: info.de@deltasensor.eu DELTA Sensor (India) Tel: Fax: info@deltasensor.co.in DELTA USA, Inc. (North America) Tel: +1 (412) Fax: +1 (412) info@delta-usa.com DELTA Sensor (Russia) Tel: info.ru@deltasensor.eu Special versions (contact us for more details) Accessories Shutters to reduce the detection field angle: the scanning angle can be adjusted for application where it is necessary to avoid the detection of nearby hot metal. Junction box CR4100DC including: pre-wired terminal block for connections to the control room, product presence signal lamp, test button and sensitivity potentiometer. Radiant bar BR3000 for simulation of hot product. Subject to change without prior notice DC4000H, with high sensitivity range for detection from 180 C DC4000F, with flame filter for detection through the flames in tube mill 6 05/ 12 Printed in France DELTA SAS 2012