Type SP87300 SAFE-T SHP9 Explosion Proof Stirring Hot Plate
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1 Type SP87300 SAFE-T SHP9 Explosion Proof Stirring Hot Plate OPERATION MANUAL SERIES 873 UL Listed for Class I, Group C and D Hazardous Locations Model # Voltage Description SP X 9.13 (23.2 cm X 23.2 cm) Aluminum Top SP X 9.13 (23.2 cm X 23.2 cm) Aluminum Top U.S. Patent No. 5,834,739 LT873X1 12/29/10 Serial Number 1
2 Table of Contents Safety Information...3 Alert Signals...3 Warnings...3 Summary of Hazardous Atmospheres...4 Introduction...5 Intended Use...5 General Usage...5 Principles of Operation...5 General Specifications...6 Installation...7 Site Selection...7 Operation...8 Heating Specifications...8 Setting the Temperature...9 Use of Dial Thermometer...9 Heating Metal Vessels...9 Heat-up Time Guide...10 Stirring Speed Specifications...10 Setting the Stirring Speed...10 Stirring Speed Guide...11 Maintenance and Servicing...12 Ordering Procedures...13 Warranty
3
4 SAFETY INFORMATION Summary of Hazardous Atmospheres Chemicals/atmospheres designated as Class I, Group C and Group D in accordance with the National Electric Code, National Fire Protection Association (NFPA 70).* * Not a complete list. For a more complete list of flammable chemicals, see classification of gases, vapors, and dusts for electrical equipment in hazardous (classified) locations, NFPA Warning To reduce the risk of fire or explosion, do not operate or install the SAFE-T SHP9 where the marked operating temperature (T2A, 280 C) exceeds the ignition temperatures of the chemical vapors/hazardous atmospheres present. GROUP CHEMICAL/ATMOSPHERE IGNITION TEMPERATURES C Acetaldehyde 175 C, 347 F C Diethyl Ether 160 C, 320 F C Ethylene 450 C, 842 F C Unsymmetrical Dimethyl Hydrazine (UDMH) 249 C, 480 F D Acetone 465 C, 869 F D Acrylonitrile 481 C, 898 F D Ammonia 498 C, 928 F D Benzene 498 C, 928 F D Butane 288 C, 550 F D 1-Butanol 343 C, 650 F D 2-Butanol 405 C, 761 F D n-butyl Acetate 421 C, 790 F D Cyclopropane 503 C, 938 F D Ethane 472 C, 882 F D Ethanol 363 C, 685 F D Ethyl Acetate 427 C, 800 F D Ethylene Dichloride 413 C, 775 F D Gasoline C, F D Heptane 204 C, 399 F D Hexane 225 C, 437 F D Isoamyl Alcohol 350 C, 662 F D Isoprene 220 C, 428 F D Methane (Natural Gas) 630 C, 999 F D Methanol 385 C, 725 F D Methyl Ethyl Ketone 404 C, 759 F D Methyl Isobutyl Ketone 440 C, 840 F D 2-Methyl-1-Propanol 416 C, 780 F D 2-Methyl-2-Propanol 478 C, 892 F D Naptha (Petroleum Naptha) 288 C, 550 F D Pyridine 482 C, 900 F D Octane 206 C, 403 F D Pentane 243 C, 470 F D 1-Pentanol 300 C, 572 F D Propane 450 C, 842 F D 1-Propanol 413 C, 775 F D 2-Propanol 399 C, 750 F D Propylene 455 C, 851 F D Styrene 490 C, 914 F D Toluene 480 C, 896 F D Vinyl Acetate 402 C, 756 F D Vinyl Chloride 472 C, 882 F D Xylenes C, F
5 Introduction Note The Type SP87300 SAFE-T SHP9 Stirring Hot Plate is UL listed explosionproof for Class I, Division I, Group C and D locations where flammable gases or vapors are present in sufficient quantities to produce explosive or ignitable mixtures. The Group C and D classification specifies hazardous atmospheres containing either flammable gases or vapors of flammable liquids (see NFPA 497 and NFPA 321). Intended Use The Type SP87300 SAFE-T SHP9 Stirring Hot Plate is UL listed and has been designed to meet OSHA and other safety standards. It is used for procedures requiring temperatures from 100 F (38 C) to 424 F (218 C). The unit consists of 1) a heated aluminum top plate, 2) an adjustable electronic temperature control and 3) an adjustable electronic stirring speed control. See Figure 1 for the shape and general features of the unit. General Usage Do not use this product for anything other than its intended usage. Principles of Operation The top plate is heated by a tubular heating element cast into an aluminum top plate. The temperature of the plate is controlled by a primary electronic feedback control. The primary electronic control serves to limit the top plate temperature under normal operating conditions. A secondary bimetallic thermostat is installed as a safety feature to control the temperature should the primary electronic control fail. The secondary control will limit the top plate temperature to 280 C (536 F). The stirring speed on a SAFE-T SHP9 is controlled by an electronic control. The stirring motor located in an explosion-proof enclosure is combined with a powerful magnet to provide excellent coupling with a stir bar. All control and electrical connections are contained within the aluminum explosion-proof enclosure. Temperature monitoring is provided by inserting a thermometer in the top plate well. (The thermometer is optional part # MEX126.) 5
6 Note: Max Temp. is the Temp. at the center of top plate.
7 Installation Caution The wooden shipping support attached to the bottom of the SAFE-T SHP9 stirring hot plate must be removed prior to permanent field installation. Caution Minimum allowable spacing between stirring hot plate and any vertical surface is one inch (2.54 cm). Caution To reduce the risk of fire or explosion, do not install where the marked operating temperature exceeds the ignition temperature of the hazardous atmosphere(s). Warning To avoid electrical shock this stirring hot plate must be installed by a competent, qualified electrician who is familiar with installing explosion-proof electrical equipment and ensures compatibility among the stirring hot plate specifications, power source and grounding requirements. Grounding requirements for hazardous areas are specified in Article 501 (and Article 250) of the National Electrical Code. Consult local electrical code requirements also. All units are provided with an equipment grounding lead that should be used as the primary equipment ground connection for the unit. Site Selection Install the SAFE-T SHP9 Stirring Hot Plate on a level, sturdy surface and allow space for ventilation. The electrical specifications are located on the back of the stirring hot plate. Consult customer service if your electrical service is different than that listed on the specification plate. Your SAFE-T SHP9 Stirring Hot Plate is designed for permanent installation. Permanent installation is made possible with integral mounting lugs and 1/2 (1.3 cm) conduit with 18 (45.7 cm) of lead wire provided. Leads are factory sealed to meet the requirements of Article 501 of the National Electrical Codes (NEC). The SAFE-T SHP9 Stirring Hot Plate must be hardwired per NEC (USA) or CEC (Canada) requirements. An external switch or circuit breaker needs to be included in the building installation in close proximity of the unit as a means to disconnect supply circuit. Overcurrent protection devices should be included in the installation. The unit can be connected to a branch circuit not exceeding 20 Amps. The stirring hot plate installation must conform with installation requirements for electrical equipment intended for use in Class I, Group C and D hazardous locations as defined by the NEC and electrical code requirements of your area. 7
8 Operation Heating Specifications Element Type: Cast-in Tubular Heating Element Warning Due to the nature of this product, operator safety will be endangered should maintenance or servicing be performed on it. Temperature range at the center of hotplate: 38 C C ± 3 C Temperature cut-off: 235 C ± 9 C Heat-up time to maximum temperature (218 C, unloaded top plate): 16.5 minutes at nominal voltage Caution Maximum load of the top plate is 25 lbs. (11.3 kg). Note Accuracy of the dial thermometer (part # MEX126) is ±3 C. Caution The aluminum top plate is easily stained. Do not use a wire brush to clean the unit. Using a wire brush will modify the integrity of the surface and it could affect your heat stability. Wipe the top plate with water only, using a lightly dampened non-abrasive cloth. Temperature stability at center of top plate surface at 70 C: ±1 C Temperature stability at center of top plate surface at 218 C: ±3 C Uniformity of top plate surface at 70 C (center to 1 or 2.54 cm from corners): ±2 C Uniformity of top plate surface at 218 C (center to 1 or 2.54 cm from corners): ±10 C Accuracy of the temperature indicated on the dial thermometer (see note at left) (optional) vs. the average hot plate temperature when the unit is operating at 70 C: ± 3.5 C Accuracy of the temperature indicated on the dial thermometer (see note at left) (optional part) vs. the average hot plate temperature when the unit is operating at 218 C: ±10 C Dial marks for heat control knob settings are for reference only. The dial marks indicate approximate hot plate temperature in C (±15 C). 8
9 OPERATION Warning To prevent ignition of hazardous atmospheres, the aluminum explosion-proof enclosure chambers must be kept closed (screws securely tightened) whenever the unit is in operation and/or connected to power supply circuit. Hot Surface Caution: Hot Surface. Avoid Contact. The top plate will remain hot without visual indication for some time after the unit is turned off. Warning Temperature cycling over a temperature range greater than 5 C with a period of approximately 6 minutes may be observed when operating the SAFE-T SHP9 at 220 C or higher. If such cycling is observed, the unit is functioning under abnormal or fault conditions and the secondary bimetallic thermostat is controlling the top plate temperature. Under these circumstances, the unit should first be turned off at both the heat and stir dial switches and the external circuit breaker and allowed to cool completely. Next, in an atmosphere absolutely free of flammable liquids, gases, and/or vapors, test the heat control function of the SAFE-T SHP9 at several temperature settings within the range of 38 C to 220 C. If the top plate temperature of the unit again cycles with a period of approximately 6 minutes over a temperature range greater than 5 C when ramping to or operating at 220 C, return the unit to the factory. Setting the Temperature Dial (Control) Switch Turn clockwise to the desired temperature. Dial marks indicate approximate surface temperature in C. When the temperature for a given dial setting has been reached, the control will regulate the hot plate. To turn OFF hot plate, turn dial switch fully counterclockwise to the OFF position. Use of Dial Thermometer The optional dial thermometer (part # MEX126) can be used to set and monitor the temperature of the aluminum top plate. Heating Metal Vessels Metal vessels may be heated safely on the SAFE-T SHP9 without the danger of the vessel reflecting enough heat back to the top to cause the aluminum to soften. The electronic control in the SAFE-T SHP9 will regulate the aluminum top plate temperature. Warning To prevent ignition of hazardous atmospheres, do not use electrical equipment such as a thermocouple and pyrometer to monitor the hot plate temperature unless it is UL listed for the same hazardous atmospheres and temperature rating as the SAFE-T SHP9. The thermocouple and pyrometer could serve as a source of ignition. 9
10 Unit* SP87325 (120V) Temperature Setpoint Max.Dial Setting 230 Flask Size Amount of Solution Time to Vigorous Boil 1 Liter 600 ml water 60 min.
11 OPERATION Unit* Flask Size Stirring Speed Guide (All stirring speed measurements made at 21.5 C) Stir Bar Size Amount of Solution Viscosity Maximum Speed** SP liter 2 in. 600 ml water 1,200 rpm SP liter 2 in. 600 ml corn oil 1,200 rpm SP liter 2 in 600 ml SP ml 2 in 350 ml 30 weight motor oil 1,265 centipoise viscosity std. 950 rpm 400 rpm SP liter 2 in 350 ml corn syrup (light) 70 rpm *The SP87324 unit performs similarly. **Maximum speed obtained without the stir bar losing coupling with the magnet in the SAFE-T SHP9. 11
12 Maintenance and Servicing Caution To reduce the risk of the ignition of hazardous atmospheres, no repairs are to be made to this product. Due to the nature of this product, operator safety will be endangered should maintenance or servicing be performed on it by the operator. The unit does not contain serviceable parts. 12
13 For the name of the authorized Thermo Scientific product dealer nearest you or any additional information, contact us: North America: USA/Canada (866-9-THERMO) Europe: Austria , Belgium , France , Germany national toll free ,Germany international , Italy , Netherlands , Nordic/Baltic countries ,Russia/CIS +7 (812) , Spain/Portugal , Switzerland , UK/Ireland Asia: China or , India toll free , India ,Japan ,Other Asian countries Countries not listed: or
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