Barloworld Scientific SB161-3 3 Position Hotplates and Stirrers Instruction Manual

Barloworld Scientific SB161-3 3 Position Hotplates and Stirrers

Thank you for purchasing this Barloworld Scientific product. To get the best performance from the equipment, and for your personal safety, please read these instructions carefully before use. Barloworld Scientific hotplates and stirrers are designed to operate under the following conditions:

• For indoor use only
• Use in a well ventilated area
• Ambient temperature range +5°C to +40°C
• Altitude to 2000m
• Relative humidity not exceeding 80%
• Mains supply fluctuations not exceeding 10% of nominal
• Overvoltage category II IEC60364-4-443
• Pollution degree 2 IEC664
• Use with a minimum distance all round of 200mm from walls or other items

If the equipment is not used in the manner described in this manual the protection provided by the equipment may be impaired.

Electrical Installation

Before connection please ensure that the line supply corresponds to that stated on the rating label. Both models require a supply rated at: 230V, 50Hz,~ , single phase.

Power requirements

• Model Wattage
• SB161-3 150W
• SB162-3 2250W

THIS EQUIPMENT MUST BE EARTHED

• There is an IEC socket at the rear of the instrument for connection to the mains supply, (see figure 2). The unit is supplied with two mains leads fitted with IEC plugs for connection to the instrument. One has a U.K. 3 pin plug and the other has a 2 pin “Shuko” plug for connection to the mains. Choose the lead appropriate for your electrical installation and discard the other.
• Should neither lead be suitable, take the lead with the U.K. plug and replace the plug with a suitable alternative. See the enclosed instruction sheet for advice on how to carry out this procedure.
• Should the mains lead require replacement a cable of 1mm2 of harmonised code H05W-F connected to an IEC 320 plug should be used.

IF IN DOUBT CONSULT A QUALIFIED ELECTRICIAN

• The mains lead should be connected to the instrument BEFORE connection to the mains supply.
• NOTE that when connected to the mains supply a green neon light on the front of the unit illuminates, (see figure 1).

Operation

Heating SB162-3
The control knobs labelled “Heat” on the front panel control the heat output and hence the plate temperature. There is a separate control knob for each of the 3 plates, which operate independently of each other. The knobs are graduated with an approximate temperature scale. This scale refers to the temperature of the top plates and not to the temperature of the contents of the vessel being heated. When the heat is switched on for any plate an amber pilot light will illuminate next to the control knob for that plate. When the surface of a plate becomes too hot to touch a red warning light on the front panel will begin to flash next to the heat control knob for that plate. This will continue to flash while the plate temperature is above 50°C so long as the unit remains connected to the electricity supply.

WARNING: The top surface of the instrument may be HOT. In free air a surface temperature of 325°C can be achieved.
Do not leave heaters switched on when not in use.

Stirring SB161-3, SB162-3
The control knobs labelled “Stir” on the front panel control the stirrer speed. There are 3 independently controlled stirrer positions with the centre located directly above each of the knobs. When switched on an amber pilot light will illuminate next to the control knob illuminates. The knobs are graduated with an arbitrary 1-9 scale. Turning the knob to a higher number increases the stirrer speed.

Safety Advice

• Do not use the instrument to heat inflammable liquids
• Never lift or carry the instrument until it has been switched off and allowed to cool for at least 30 minutes. The hot warning light will give guidance.
• The unit should be carried using both hands with the fingers under the side edges.
• Never move or carry the unit with containers on the top plate or while still connected to the mains supply.
• There is a danger of liquid spillage if containers are over-filled and stirred at high speed. Always build stirrer speed slowly and never stir more rapidly than necessary.
• NEVER place a cold glass vessel onto a hotplate which is already hot.

Cleaning and Care

• Before attempting cleaning ensure that the top is cool and disconnect from the mains electricity supply.
• The metal casing should be cleaned using a damp cloth and a mild detergent solution.
• The metal top plate should be cleaned using a damp cloth and a mild detergent solution.
• Cleaning is made easier if spillage are attended to promptly. In any case, spillage of acids and alkalis MUST be removed immediately as these chemicals can attack and damage the surface of the aluminium alloy. Ensure that the appropriate safety precautions are observed.

Preparation of Media

Take particular care when heating liquids having a high viscosity. Viscous liquids can act as thermal insulators and can cause thermal breakage of the glassware. This is very important with media solutions as the viscosity will usually increase as the temperature rises.

• Check that the stirring action is sufficient to agitate the whole of the liquid. Unstirred areas in the liquid can result in uneven heat transfer and “hot spots” in the glassware. This can induce thermal stress and so cause failure.
• Check the stirring action regularly to ensure that it remains adequate as the viscosity of the solution increases.
• Always use the largest magnetic follower possible and, if necessary, use a mechanical overhead stirrer.
• Do not use glass vessels with thick walls, e.g. Pyrex Heavy Duty Ware or standard beakers and flasks having capacities of 5 litres or greater.
• NEVER heat glass bottles on a hotplate.
• Ensure that the heat is built up slowly to avoid localised overheating.
• Ensure the glassware is completely free from scratches or other defects.
• Place the hotplate in a tray large enough to contain the liquid in the event of glassware failure.
• Wear the appropriate safety clothing – e.g. gloves, goggles, protective apron etc.

Accessory

• A rod is available to support apparatus used with the instrument.
• The rod is supplied with a mounting bracket that can be mounted behind any of the 3 plate positions. The instrument is provided with predrilled holes to accept the mounting bracket.
• To fit the rod to your instrument, first isolate from the mains supply and allow to cool. Attach the bracket to the rear or the instrument with the screws provided and then simply screw the threaded end of the support rod into the bracket.

Servicing and Repair
This product range does not require any routine servicing.

Note: There are no internal user replaceable parts.

In the event of product failure it is recommended that any repair is only undertaken by suitably qualified personnel. For advice or to receive a service manual please contact the Technical Service Department of Barloworld Scientific Ltd. Only spare parts supplied by Barloworld Scientific or its agent should be used. Fitting of nonapproved parts may affect the performance of the safety features of the instrument.

Note: The magnetic stirrer drive utilises strong magnets.

If in doubt, please contact the Technical Service Department of Barloworld Scientific Ltd.

• Stone, Staffordshire ST15 0SA
• United Kingdom
• Tel: +44 (0) 1785 812121
• Fax: +44 (0) 1785 813748
• e-mail equipment@barloworld-scientific.com
• www.barloworld-scientific.com

Spares
The following spare parts are available from your laboratory supplier. For a comprehensive parts list please contact the Technical Service Department of Barloworld Scientific Ltd quoting model and serial number.

Warranty

• Barloworld Scientific Ltd warrants this instrument to be free from defects in material and workmanship, when used under normal laboratory conditions, for a period of three (3) years. In the event of a justified claim Barloworld Scientific will replace any defective component free of charge.
• This warranty does NOT apply if any repair has been made or attempted other than by Barloworld Scientific or its agent.

Description Catalogue

• Number
• Control knob SB160/CK
• Rubber feet, set of 4 SB160/RF
• Retort rod, CS10

References

• The domain name Scientific.com is for sale
• SCIENTIFIC.IT
• Fabricantes de vidrio para la ciencia - Afora
• Barloworld-scientific.com

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