Isotech Libra 785 Operating Manual

PARALLEL TUBE

LIQUID BATH

LIBRA MODEL 785

User Maintenance Manual/Handbook

Isothermal Technology Limited, Pine Grove, Southport, PR9 9AG, England

Tel: [phone] Fax: [phone] Internet: www.isotech.co.uk E-mail: [e-mail]

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

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Parallel Tube Liquid Bath model Libra 785 Iss. 01 - 05/13

CONTENTS

CONTENTS ....................................................................................................................................................................................... 2

GUARANTEE...................................................................................................................................................................................... 3

CAUTIONARY NOTE ........................................................................................................................................................................ 4

EMC INFORMATION ........................................................................................................................................................................ 5

ELECTRICAL SAFETY ........................................................................................................................................................................ 5

HEALTH AND SAFETY INSTRUCTIONS ......................................................................................................................................... 6

ON ARRIVAL ...................................................................................................................................................................................... 7

ELECTRICITY SUPPLY ....................................................................................................................................................................... 8

IMPORTANT - READ THIS NOW! .................................................................................................................................................... 9

REFRIGERATION ........................................................................................................................................................................... 9

Chiller function ............................................................................................................................................................................. 9

SETTING UP................................................................................................................................................................................. 10

FIGURE 1: FRONT PANEL CONTROLS ......................................................................................................................................... 11

FIGURE 2: REAR PANEL LAYOUT .................................................................................................................................................. 12

USING THE CONTROLLER ............................................................................................................................................................ 13

FRONT PANEL LAYOUT ............................................................................................................................................................ 13

The Temperature Controller ..................................................................................................................................................... 13

Altering the Setpoint .................................................................................................................................................................. 13

Instrument Address .................................................................................................................................................................... 13

Monitoring the Controller Status ............................................................................................................................................... 13

Additional adjustments ............................................................................................................................................................... 14

OVER TEMPERATURE CONTROLLER (H MODEL ONLY) ...................................................................................................... 14

OVER AND UNDER TEMPERATURE CONTROLLER (M MODEL ONLY) .............................................................................. 14

OVER TEMPERATURE CONDITION ......................................................................................................................................... 15

FLOW CONTROL ........................................................................................................................................................................... 16

OPERATION AND INITIAL TESTING ............................................................................................................................................ 17

LIQUIDS ........................................................................................................................................................................................... 18

CHOICE OF LIQUIDS.................................................................................................................................................................. 18

LIQUID LEVEL .............................................................................................................................................................................. 18

CHANGING LIQUIDS.................................................................................................................................................................. 18

TR0UBLE SHOOTING ..................................................................................................................................................................... 20

USING THE PC INTERFACE ........................................................................................................................................................... 21

CONNECTIONS .......................................................................................................................................................................... 21

USING THE INTERFACE ............................................................................................................................................................. 21

CAL NOTEPAD ................................................................................................................................................................................ 22

MINIMUM SYSTEM REQUIREMENTS ........................................................................................................................................ 22

DEVELOPMENT .......................................................................................................................................................................... 22

License ....................................................................................................................................................................................... 22

INSTALLING CAL NOTEPAD ..................................................................................................................................................... 23

STARTING CAL NOTEPAD ........................................................................................................................................................ 23

Protocol ..................................................................................................................................................................................... 23

ACCESSORIES .................................................................................................................................................................................. 24

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Parallel Tube Liquid Bath model Libra 785 Iss. 01 - 05/13

GUARANTEE

This instrument has been manufactured to exacting standards and is guaranteed for twelve months against electrical
break-down or mechanical failure caused through defective material or workmanship, provided the failure is not the
result of misuse. In the event of failure covered by this guarantee, the instrument must be returned, carriage paid, to
the supplier for examination and will be replaced or repaired at our option.

FRAGILE CERAMIC AND/OR GLASS PARTS ARE NOT COVERED BY THIS 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.
PINE GROVE, SOUTHPORT
PR9 9AG, ENGLAND

TEL: [phone]/544611
FAX: [phone]

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 3 of 24

Parallel Tube Liquid Bath model Libra 785 Iss. 01 - 05/13

CAUTIONARY NOTE

ISOTECH PRODUCTS ARE INTENDED FOR USE BY TECHNICALLY TRAINED AND COMPETENT
PERSONNEL FAMILIAR WITH GOOD MEASUREMENT PRACTICES.

IT IS EXPECTED THAT PERSONNEL USING THIS EQUIPMENT WILL BE COMPETENT WITH THE
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. 01 - 05/13

EMC INFORMATION

Symbol Identification

Publication

Description

ISO3864

Caution (refer to handbook)

IEC 417

Caution, Hot Surface

This product meets the requirements of the European Directive on Electromagnetic Compatibility (EMC)
89/336/EEC as amended by EC Directive 92/31/EEC and the European Low Voltage Directive 73/25/EEC, amended
by 93/68/EEC. To ensure emission compliance please ensure that any serial communications connecting leads are
fully screened.

The product meets the susceptibility requirements of EN 50082-1, criterion B.

ELECTRICAL SAFETY

This equipment must be correctly earthed.

This equipment is a Class 1 Appliance. A protective earth is used to ensure the conductive parts can not become live
in the event of a failure of the insulation.

The protective conductor of the flexible mains cable which is coloured green/yellow MUST be connected to a suitable
earth.

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.

Conductive pollution, e.g. Carbon dust, must be excluded from the apparatus. EN61010 pollution degrees 2.

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Parallel Tube Liquid Bath model Libra 785 Iss. 01 - 05/13

HEALTH AND SAFETY INSTRUCTIONS

1. Read this entire handbook before use.

2. Wear appropriate protective clothing.

3. Operators of this equipment should be adequately trained in the handling of hot and cold items and liquids.

4. Do not use the apparatus for jobs other than those for which it was designed, i.e. the calibration of
thermometers.

5. Do not handle the apparatus when it is hot (or cold), unless wearing the appropriate protective clothing and
having the necessary training.

6. Do not drill, modify or otherwise change the shape of the apparatus.

7. Do not dismantle the apparatus.

8. Do not use the apparatus outside its recommended temperature range.

9. If cased, do not return the apparatus to its carrying case until the unit has cooled.

10. There are no user serviceable parts inside. Contact your nearest Isotech agent for repair.

11. Ensure materials, especially flammable materials are kept away from hot parts of the apparatus, to prevent
fire risk.

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Parallel Tube Liquid Bath model Libra 785 Iss. 01 - 05/13

ON ARRIVAL

Check List:

You should have the following parts;

1. Main Bath Assembly.

2. One overflow and one drain pipe.

3. This User Maintenance Manual/Handbook.

4. PC Comms Lead.

Optional accessories are available and will on be present if specified on your order.

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.

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Parallel Tube Liquid Bath model Libra 785 Iss. 01 - 05/13

ELECTRICITY SUPPLY

COLOUR

FUNCTION

Green/yellow

Earth (Ground)

Brown

Live (line)

Blue

Neutral

Before connecting to the electricity supply please familiarise yourself with the parts of the handbook relevant to your
model.

Your bath is supplied with a fixed main cable. Due to the complexity of world power supplies and installation
connectors, your bath has no connector fitted. Please fit a suitable connector for you local supplier’s outlet.

Take care to ensure the old plug is disposed safely.

The cable is colour coded as follows:

Please ensure that your unit is correctly connected to the electricity supply.

THE APPARATUS MUST BE CORRECTLY EARTHED (GROUNDED)

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Parallel Tube Liquid Bath model Libra 785 Iss. 01 - 05/13