Table of Contents
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Table of Contents
Summary of Contents for Grant Instruments R Series
- Page 1 Low temperature bath/circulator R series Operating instructions...
- Page 2 Version 3 - May 2005 Low temperature bath/circulator Operating instructions Page 2...
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Page 3: Table Of Contents
Contents Safety..................4 Getting Started...............6 Unit overview Unpacking Installation Operation ................8 Controls and features Rear panel reference and description Thermostat unit Filling Switching ON and setting up Specific examples..............12 Fault diagnosis..............15 Technical specification............17 Pump specifications.............19 Maintenance................21 Cleaning Replacement of fuses Guarantee and service............22 Low temperature bath/circulator Version 4 - Jan 2010 Operating instructions... -
Page 4: Safety
1. Safety Safety The following symbols mean:- Caution: Read these operating instructions fully before use and pay particular attention to sections containing this symbol. Caution: Surfaces can become hot during use. Always observe the following safety precautions. Use only as specified by the operating instructions, or the intrinsic protection may be impaired. After transport or storage in humid conditions, dry out the unit before connecting it to the supply voltage. - Page 5 It is the user's responsibility to carry out appropriate decontamination if hazardous material is spilt on or inside the equipment. Do not connect to a power supply or switch on before filling the tank. Take care when topping up or draining, as the liquid in the tank may be very hot or cold. If the alarm lamp is illuminated do not touch the liquid or the tank base, they may be very hot.
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Page 6: Getting Started
2. Getting started Unit overview Optima low temperature circulators provide a source of cooling for many sensitive analytical procedures. Applications requiring the precision temperature control of samples include spectrophotometry, viscometry, refractrometry and electrophoresis. Grant’s range of more powerful chillers are ideally suited for applications requiring the removal of the mechanical or electrical heat produced in apparatus or machinery, combined with a higher pressure flow for faster heat removal within restricted systems. - Page 7 2.3.1 Assembly - All models (see Fig 1) Remove the thermostat mounting plate from the tank by unscrewing the four black knobs located in the corners of the plate (1a). Feed the Optima thermostat through the hole in the bridge plate, being careful not to force it.
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Page 8: Operation
3. Operation Controls and features (see Fig 2) Refrigeration unit power (mains) switch. Over temperature protection re-set. The unit is protected from over heating by the over temperature cut-out. This will be actuated between 110°C and 120°C. To re-set the unit first wait for the liquid to cool below 100°C. -
Page 9: Rear Panel Reference And Description
Rear panel reference and description (see Fig 3) IEC outlet to accessory pump. IEC outlet to Optima Thermostat unit. IEC inlet to Refrigeration unit with integral twin fuse draw. Communications link socket. The refrigeration unit may be controlled with an Optima GR150 or GP200 thermostat unit. -
Page 10: Thermostat Unit
FUSE 250mA(T) FUSE 250mA(T) Fig 3f Fig 3e Fig 3d R2L/R3L Thermostat unit Allowable temperature range with suitable Refrigeration Units: GA100 GD100 GD120 GR150 GP200 OPTIMA UNIT Max. temperature ºC Min. temperature ºC Pump ü ü ü Use with communications cable ü... -
Page 11: Filling
Filling Before filling the tank, disconnect the mains power supply. Allow for thermal expansion and contraction of the liquid and for any liquid in external circulation paths. Temperature range Specified liquids Silicone oil - low viscosity (Bayer silicone M3) -50 to 50ºC For safe disposal consult your Local Environmental Health Office 50% water, 50% antifreeze (inhibited ethylene glycol) -30 to 30ºC:... -
Page 12: Specific Examples
4. Specific examples This section provides the user with specific examples of how the unit may be used to achieve certain requirements. The refrigeration should not be switched (either ) more than once during any five minute period. WARNING Before proceeding with a worked example please ensure you have read and understood the rest of this instruction manual. - Page 13 Equipment: This type of complex thermal ramping requires the use of either a GR150 or a GP200 Optima thermostat. Any of the Refrigeration units can be controlled with the exception of R1/R1L. As this example will reduce the temperature down to -20°C, we can use any of these units. You will also require the Communications lead as supplied with the Refrigeration unit.
- Page 14 Phase 4 Rotate the knob so that [ ]is displayed, press and another 3InsertAfter segment [ ] will be displayed, introducing Phase 4. ‚ Rotate the knob so that [ ] is displayed and press to adjust. Adjust to 40°C 4.Temp then press to accept.
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Page 15: Fault Diagnosis
5. Fault diagnosis Symptom Possible cause Action required Unit does not operate Unit not switched on Switch on Unit not plugged into Plug in, switch on power supply Fuse blown in unit or Check and replace in plug (UK units only) Electrical power supply Check that other electrical failure... - Page 16 Symptom Possible cause Action required Stirrer obstructed Clear obstruction Stirrer motor does not rotate or pump does Pump obstructed Clear obstruction not operate If motor shaft rotates freely, Have unit checked by competent person then motor thermal fuse may have blown Version 4 - Jan 2010 Low temperature bath/circulator Operating instructions...
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Page 17: Technical Specification
10 to 35ºC with maximum relative humidity of 80%. •Installation Category II (Transient voltages). •Pollution degree 2 in accordance with IEC 664. •For operation at altitudes up to 2000 metres. See following page for full specification R SERIES COOLING PERFORMANCE ambient 20ºC R1/R2 50% water/50% glycol ºC... - Page 18 Version 4 - Jan 2010 Low temperature bath/circulator Operating instructions Page 18...
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Page 19: Pump Specifications
7. Pump specifications Pumps Pumps come as part of the GD120, GR150 and GP200 thermostats. For details on their operation please refer to the appropriate operating instructions (as supplied with the units): GD120………………………..Part No.17090 GR159, GP200………………Part No.17091 If greater head (pressure) is required you can choose from two accessory pumps and the appropriate pump lid. - Page 20 Performance graph The graph below shows the shows the pressure and flow performance for the different pumps. VTP OPTIONAL PUMPS AND OPTIMA SERIES THERMOSTAT PUMP PERFORMANCE water VTP1l VTP2 GP200 (setting 5) GD120/GR150 8 10 12 14 16 18 20 22 24 FLOW L/min Fig 6 PUMP PERFORMANCE GRAPH Version 4 - Jan 2010...
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Page 21: Maintenance
8. Maintenance 8.1. Cleaning The case can be cleaned with a damp cloth after disconnection from the power supply. Do not use solvents. The immersed parts can be cleaned using proprietary heating element cleaners. CAUTION: these may be toxic - follow the cleaner manufacturer's instructions. -
Page 22: Guarantee And Service
9. Guarantee and service Guarantee When used in laboratory conditions and according to these operating instructions, this bath is guaranteed for THREE YEARS against faulty materials or workmanship. Service All Grant laboratory products are designed to comply with IEC1010-1 and can be flash tested. - Page 24 Grant Instruments (Cambridge) Ltd Shepreth Cambridgeshire SG8 6GB England Tel: +44 (0)1763 260811 Fax: +44 (0)1763 262410 www.grant.co.uk Printed in England - Low temp bath circulator/R series/17908/UK...
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