Isotech MEDUSA 510 Series, MEDUSA 511 Series User Maintenance Manual/handbook

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Medusa 510/511 Series Iss.12 – 08/13

MEDUSA 510/511 SERIES

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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Medusa 510/511 Series Iss.12 – 08/13

CONTENTS

GUARANTEE....................................................................................................................................................................................... 4

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

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

ENVIRONMENTAL RATINGS ........................................................................................................................................................ 5

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

„DO‟S AND DON‟TS‟ .......................................................................................................................................................................... 7

CAUTIONARY NOTE ......................................................................................................................................................................... 8

TRANSIT CLAMP ................................................................................................................................................................................ 9

UNPACKING AND INITIAL INSPECTION ..................................................................................................................................... 10

ELECTRICITY SUPPLY ...................................................................................................................................................................... 10

INTRODUCTION ............................................................................................................................................................................. 11

COMPARISON CALIBRATION .................................................................................................................................................... 11

Using the Controller ............................................................................................................................................... 11

Using the Indicator - (Not Basic (B) Model) ........................................................................................................... 11

USING EXTERNAL STANDARDS ......................................................................................................................... 12

MODE OF OPERATION ................................................................................................................................................................... 13

ITS-90 FIXED POINT CALIBRATION .......................................................................................................................................... 13

METAL BLOCK BATH .................................................................................................................................................................. 13

BLACK BODY SOURCE ................................................................................................................................................................ 14

SURFACE SENSOR CALIBRATION .............................................................................................................................................. 14

ADJUSTING THE TIMER .................................................................................................................................................................. 15

THERMOMETRIC FIXED POINTS (a tutorial note) ......................................................................................................................... 16

HINT ON HOW TO MEASURE THE TRUE TEMPERATURE INSIDE THE ACCESSORIES SUPPLIED WITH THE MEDUSA

SERIES ................................................................................................................................................................................................ 17

The Controller ........................................................................................................................................................ 17

The Reference Thermometer ................................................................................................................................. 17

The Industrial Thermometer .................................................................................................................................. 17

SPECIFICATION ............................................................................................................................................................................... 18

MEDUSA 1 PERFORMANCE GRAPHS ............................................................................................................................................. 19

MEDUSA 2 PERFORMANCE GRAPHS ............................................................................................................................................. 20

OPERATING THE MEDUSA ............................................................................................................................................................. 21

FRONT PANEL LAYOUT ............................................................................................................................................................. 21

THE TEMPERATURE CONTROLLER .......................................................................................................................................... 21

ALTERING THE SETPOINT ......................................................................................................................................................... 21

ADVANCED CONTROLLER FEATURES ..................................................................................................................................... 21

Setpoint Ramp Rate ................................................................................................................................................. 21

Instrument Address ................................................................................................................................................. 22

Monitoring the Controller Status ............................................................................................................................ 22

Units ........................................................................................................................................................................ 22

The Temperature Indicator (Not Basic (B) Models) ............................................................................................... 22

Setting the Input Type ............................................................................................................................................. 22

Enabling / Disabling Custom Calibration ................................................................................................................. 23

Instrument Address ................................................................................................................................................. 23

Monitoring the Indicator Status ............................................................................................................................... 24

Units ........................................................................................................................................................................ 24

Advanced Indicator Operation ................................................................................................................................ 24

CALIBRATION DATA EXAMPLE ..................................................................................................................................................... 25

CONNECTING A CURRENT TRANSMITTER (UP TO 20MA) ...................................................................................................... 26

SELECTING CONFIGURATION LEVEL ...................................................................................................................................... 26

Testing Thermostats ............................................................................................................................................... 27

OPERATING THE MEDUSA 511 ...................................................................................................................................................... 28

USING THE PC INTERFACE ............................................................................................................................................................ 29

CONNECTIONS ........................................................................................................................................................................... 29

CAL NOTEPAD ................................................................................................................................................................................. 30

DEVELOPMENT ........................................................................................................................................................................... 30

HOW TO INSTALL CAL NOTEPAD ........................................................................................................................................... 31

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Medusa 510/511 Series Iss.12 – 08/13

PROTOCOL .................................................................................................................................................................................. 31

DIAGNOSTIC ALARMS..................................................................................................................................................................... 32

CONTROLLER ERROR MESSAGES .............................................................................................................................................. 32

INITIAL TESTING.............................................................................................................................................................................. 33

MAINTENANCE ............................................................................................................................................................................... 34

FIGURE 2 ....................................................................................................................................................................................... 35

FIGURE 3: 511 3 ZONE VERSION - 110V VERSION ................................................................................................................... 36

APPENDIX 1: MEDUSA SERIES TROUBLE SHOOTING ................................................................................................................ 37

Unit fails to operate................................................................................................................................................. 37

Indicator reads incorrectly ...................................................................................................................................... 37

Cannot establish PC Communications .................................................................................................................... 37

APPENDIX 2: ACCESSORIES PARTS LIST FOR MEDUSA 510 ....................................................................................................... 38

APPENDIX 2: ACCESSORIES PARTS LIST FOR MEDUSA 511 ....................................................................................................... 39

APPENDIX 3: INDICATOR CONFIGURATION (Reference Only) ................................................................................................. 40

Config.INST ............................................................................................................................................................. 40

Config.IP .................................................................................................................................................................. 40

Config.CAL .............................................................................................................................................................. 40

Config.AL ................................................................................................................................................................ 41

Config.HA ................................................................................................................................................................ 41

Config.1A ................................................................................................................................................................ 41

Config.2A ................................................................................................................................................................ 41

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Medusa 510/511 Series Iss.12 – 08/13

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.

We recommend that this instrument to be re-calibrated annually.

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.

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Medusa 510/511 Series Iss.12 – 08/13

EMC INFORMATION

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.

Symbol Identification

Publication

Description

ISO3864

Caution (refer to manual)

IEC 417

Caution, Hot Surface

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 cannot become live
in the event of a failure of the insulation.

The protective conductor of the flexible mains cable which is colored 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 degree 2.

This apparatus has two input connectors for temperature sensors. These inputs are only suitable for either a
thermocouple or resistance thermometer. No other sensor or signal may be connected.

ENVIRONMENTAL RATINGS

Operating Temperature 5-35°C

Relative Humidity 5-95%, non condensing

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Medusa 510/511 Series Iss.12 – 08/13

HEALTH AND SAFETY INSTRUCTIONS

1. Read this entire manual 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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Medusa 510/511 Series Iss.12 – 08/13

‘DO’S AND DON’TS’

DO NOT handle the accessories when they are very hot or very cold.

DO NOT place hot or cold accessories back in the carrying case

DO NOT use the pocket designed for the black body source sensor to measure the temperature of the insert or

surface calibrator.

DO use that pocket for pre-warming or storage.

DO NOT spill liquids inside the Medusa.

DO NOT rely on the controller to tell you the temperature of the insert. Its job is only to provide an isothermal

volume. It is the calibrated working standard that is used to measure actual temperature.

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Medusa 510/511 Series Iss.12 – 08/13

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.

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Medusa 510/511 Series Iss.11 – 07/12

TRANSIT CLAMP

EVERY EFFORT HAS BEEN MADE TO PACKAGE THIS UNIT FOR TRANSPORT AND TO ENSURE ITS
GOOD CONDITION ON ARRIVAL AT ITS DESTINATION

BEFORE COMMISSIONING IT IS NECESSARY TO REMOVE THE FURNACE CORE TRANSIT CLAMP.
TO AVOID DAMAGE PLEASE FOLLOW INSTRUCTIONS

1. Slacken the central nut using the required tube spanner; the insertion of a screwdriver through the tube

spanner will prevent the central stud turning.

2. Remove the 4 bolts securing the transit clamp to the side of the unit. Loosen each screw equally by degrees

and then completely remove the screws.

3. Gently lift the transit clamp vertically; a central tube which has secured the furnace core will then slide out.

The 4 screws should then be replaced to secure the handles to the side of the unit.

4. Normal commissioning procedure may now be followed.

5. Keep the transit clamp and use it if the furnace is ever transported.

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Medusa 510/511 Series Iss.11 – 07/12

UNPACKING AND INITIAL INSPECTION

Our Packing Department uses custom designed packaging to send out your unit, but as accidents can still happen in
transit, you are advised, after unpacking the unit, to inspect it for any sign of shipping damage, and confirm that your
delivery is in accordance with the packing note. Should you find any damage or that part of the delivery is missing,
please notify your nearest distributor or Isothermal Technology, and the carrier immediately. If the unit is damaged
you should keep the packing for possible insurance assessment.

ELECTRICITY SUPPLY

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

Your unit's supply voltage requirement is specified on a plate on the instrument along with the serial number. All
Medusa instruments will work on an electricity supply frequency of 50Hz or 60Hz.

The apparatus is provided with an approved power cord. If the plug is not suitable for your location then the plug
should be removed and replaced with an appropriate plug.

Take care to ensure the old plug is disposed safely.

The cable is colour coded as follows:

COLOUR FUNCTION

Green/yellow 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)

The units on/off switch is located on the power inlet. Take care NOT to switch the unit off when it is hot - allow to
cool first.

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Medusa 510/511 Series Iss.11 – 07/12

INTRODUCTION

The Medusa range of products allows unprecedented flexibility for the calibration of temperature sensors. The
Medusa may be used with the following options:

1. An ITS-90 Fixed Point Apparatus

1. As a Metal Block Bath

2. A Black Body Source

3. A Surface Sensor Calibrator

The Medusa is available in two variants. The Basic (B) model which incorporates a single temperature controller.
The Potts and Site (S) model also include a temperature indicator and timer.

COMPARISON CALIBRATION

By definition, one compares industrial thermometers to a calibrated standard.

There are 3 methods commonly used.

Using the Controller

Using the controller as the “calibrated standard” this method means that the complete bath is calibrated by

comparing the controller reading to a calibrated standard placed in the bath.

This is a common method but is unsafe since the control sensor is

a) Inaccessible
b) in the wrong place to give correct temperature of the insert

For these reasons it fails to satisfy ISO9000 and gives large uncertainties.

Using the Indicator - (Not Basic (B) Model)

Here an indicator and external calibrated sensor are used to measure the temperature of
the insert. This arrangement gives good accurate and reliable results. To recalibrate
however it does mean sending the whole calibrator back to the calibration laboratory.
This, the calibrator is self-contained, self-sufficient and meets ISO9000 requirements.

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Medusa 510/511 Series Iss.11 – 07/12

USING EXTERNAL STANDARDS

Here a separate indicator and calibrated sensor are used to measure the inserts temperature. This can give the most
accurate and reliable results, depending on the indicator.

It means that the calibrator does not need calibrating only the indicator and its calibrated sensor need re-calibration,
but this option is more bulky, expensive and less portable than 2). It also meets ISO9000 requirements.

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Medusa 510/511 Series Iss.11 – 07/12

MODE OF OPERATION

ITS-90 FIXED POINT CALIBRATION

The ITS-90 fixed point function of the Medusa is well suited for fast, convenient, mess free calibration of
thermometers to uncertainties as low at 0.001°C.

The special cell is placed into the Medusa calibration well.

The equipment incorporates a timer which can change temperatures to allow MELTING or FREEZING of a Cell.
Once initiated the Cell can be arranged to be on the melt plateau during the day and automatically frozen and bought
back to the melt plateau overnight.

It works this way:-

The Medusa automatically switches on some 2 to 3 hours before the working day starts and gets the cell onto its melt
plateau. The indicator tells the user on their arrival in the morning that the melt has begun and calibration can
commence.

If left unused the melt continues to 6 to 12 hours and probably during the night the timer switches the apparatus off
to re-freeze the cell, the cycle is repeated each day, giving the user the fixed point all day, every day without
attention except to occasionally clean the fan filter if it becomes clogged with dust.

The Medusa works by having a controller which is set about 1°C above the fixed point which is inside the apparatus It
has an indicator with a thermometer which is used to monitor the state of the fixed point cell. It is also fitted with a
timer to automatically switch on and off the apparatus.

Indium, Tin Lead and Zinc Fixed Points all look the same, being an ingot of pure metal placed in a graphite crucible
which, to keep dirt, moisture and air out are sealed, usually in quartz glass. To avoid the use of quartz glass the
graphite crucibles are sealed into metallic containers without contamination of the pure ingot inside the crucible.

On power up the timer is set to run at setpoint 1 for 20 hours at setpoint 2 for 4 hours.

METAL BLOCK BATH

The metal block bath function of the Medusa is well suited for fast, convenient, mess free calibration of temperature
sensors.

The Medusa metal insert is placed into the calibration well.

The thermometers under test are placed into suitable holes in metal insert, see accessory page. A calibrated
reference probe should be placed into the insert and the actual temperature can be read from the temperature
indicator.

For traceable calibration the actual value of the insert temperature should be recorded along with the values from the
sensors under test.