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PARALLEL TUBE LIQUID
BATH MODEL
LIBRA 785
User Maintenance Manual/Handbook
Isothermal Technology Limited, Pine Grove, Southport, PR9 9AG, England
Tel: +44 (0)1704 543830 Fax: +44 (0)1704 544799 Internet: www.isotech.co.uk E-mail: info@isotech.co.uk
The company is always willing to give technical advice and assistance where appropriate. Equally, because of the programme of continual
development and improvement we reserve the right to amend or alter characteristics and design without prior notice. This publication is for
information only
Page 1 of 24
Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16
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Summary of Contents for Isotech LIBRA 785
- Page 1 Isothermal Technology Limited, Pine Grove, Southport, PR9 9AG, England Tel: +44 (0)1704 543830 Fax: +44 (0)1704 544799 Internet: www.isotech.co.uk E-mail: info@isotech.co.uk The company is always willing to give technical advice and assistance where appropriate. Equally, because of the programme of continual development and improvement we reserve the right to amend or alter characteristics and design without prior notice.
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Page 2: Table Of Contents
USING THE INTERFACE ................................21 CAL NOTEPAD ....................................22 DEVELOPMENT ..................................22 HOW TO INSTALL CAL NOTEPAD ............................23 PROTOCOL ....................................23 ACCESSORIES ....................................24 Page 2 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 3: Guarantee
INTERFERENCE WITH OR FAILURE TO PROPERLY MAINTAIN THIS INSTRUMENT MAY INVALIDATE THIS GUARANTEE RECOMMENDATION The life of your ISOTECH Instrument will be prolonged if regular maintenance and cleaning to remove general dust and debris is carried out. ISOTHERMAL TECHNOLOGY LTD. -
Page 4: Cautionary Note
MANAGEMENT OF APPARATUS WHICH MAY BE POWERED OR UNDER EXTREMES OF TEMPERATURE, AND ARE ABLE TO APPRECIATE THE HAZARDS WHICH MAY BE ASSOCIATED WITH, AND THE PRECAUTIONS TO BE TAKEN WITH, SUCH EQUIPMENT. Page 4 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 5: Emc Information
The blue conductor should be connected to Neutral and the Brown conductor to Live (Line). Warning: Internal mains voltage hazard. Do not remove the panels. There are no user serviceable parts inside. Contact your nearest Isotech agent for repair. Voltage transients on the supply must not exceed 2.5kV. -
Page 6: Health And Safety Instructions
If cased, do not return the apparatus to its carrying case until the unit has cooled. There are no user serviceable parts inside. Contact your nearest Isotech agent for repair. Ensure materials, especially flammable materials are kept away from hot parts of the apparatus, to prevent fire risk. -
Page 7: On Arrival
In the unlikely event of any items arriving damaged please retain the packing materials (which may need to be inspected later) and then contact your supplier. Page 7 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 8: Electricity Supply
Earth (Ground) Brown Live (line) Blue Neutral Please ensure that your unit is correctly connected to the electricity supply. THE APPARATUS MUST BE CORRECTLY EARTHED (GROUNDED) Page 8 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 9: Important - Read This Now
The diagram below gives a graphical account of the Libra medium chiller function Chiller enabled. Full cooling, by-pass valve off By-pass valve enabled Band of temperature where by-pass valve is active. Page 9 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 10: Setting Up
Fill the bath with suitable liquid, water is probably best for initial testing. Fill the bath until the level is 10mm below the top of the round central calibration tube ALWAYS ISOLATE THE BATH FROM THE SUPPLY WHEN CHANGING LIQUIDS Page 10 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... - Page 11 FIGURE 1: FRONT PANEL CONTROLS Page 11 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16...
- Page 12 FIGURE 2: REAR PANEL LAYOUT Page 12 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16...
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Page 13: Front Panel Layout
10. Auto/manual button. Allows the user to toggle between Automatic output setting, defined by the controller (default) and manual output setting. Care should be taken when using this setting. Page 13 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 14: Additional Adjustments
To access these parameters press the scroll key until they appear on the lower display and modify the value shown on the top display with the up and down keys. Page 14 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 15: Over Temperature Condition
To reset the controller, ensure the temperature for both over and under temperature is safe then press both the PAGE button and the SCROLL button simultaneously. The scrolling warning display will disappear and the illuminated beacon light up. Page 15 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 16: Flow Control
Generally the stability will be optimum when the flow is high but stable. Page 16 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 17: Operation And Initial Testing
The bath may now be used for calibration, see tutorial. For temperatures above 40°C the refrigeration, if fitted, will automatically disable and enable as the temperature drops below 40°C. Page 17 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 18: Liquids
The choice of liquid is important. If it is too viscous at the operating temperature then the bath may not perform correctly. Other criteria also need to be met, such as safety, operating range and fume emission for example. Isotech is able to supply a number of fluids for various temperature ranges, see catalogue. - Page 19 Clean the bath. Detergent and absorbent paper will assist. If the bath has been used with oil it can be helpful to re fill with water and detergent and to allow the mixture to circulate before draining again. Close the tap. Page 19 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16...
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Page 20: Tr0Uble Shooting
If the oil suddenly expands and overflows at 100°C it may have been contaminated with water and the oil should be replaced after this has been cleaned. Page 20 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 21: Using The Pc Interface
The Isotech conversion leads are suitable for maximum combined lead lengths of 10M that is adequate for most applications. CONNECTIONS For RS232 use simply connect the Isotech cable, a 9 to 25 pin converter is included to suit PCs with a 25 pin serial converter. RS422 Connections... -
Page 22: Cal Notepad
Cal NotePad was developed by Isothermal Technology using LabVIEW from National Instruments. The license details are shown on the download page and in the Cal Notepad manual. Page 22 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 23: How To Install Cal Notepad
PROTOCOL The instruments use the "Modbus Protocol" If required, e.g. for writing custom software the technical details are available from our Document Library at http://www.isotech.co.uk Page 23 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16... -
Page 24: Accessories
Supplied in 9 litre containers. Flash Point 315ºC. 915/09 Very High Temperature Silicon Oil. Temperature Range 40ºC to 288ºC. Supplied in 2 x 5 litre containers. Flash Point 288ºC. Page 24 of 24 Parallel Tube Liquid Bath model Libra 785 Iss. 03 - 11/16...
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