Cole Parmer Techne SBL-1 User manual
Instruction Manual
Version 23
Fluidised Bath
SBL-1, SBL-2, SBL-2D
IMPORTANT SUPPLEMENTARY SAFETY INFORMATION
Introduction
Techne fluidised baths are safe and effective equipment when installed and operated correctly in accordance with
the user manual. However, if used incorrectly they can pose a safety risk. Techne have designed all models of fluid-
ised baths to protect operators from hazards but users should pay attention to the following points.
Caution
Please read the user manual before installation and use.1.
Techne fluidised baths can heat up to 600°C, 700°C or even 1100°C. High temperatures are dangerous and2.
can cause serious burns to operators and ignite combustible material.
Use care and wear protective gloves to protect hands and protective glasses to protect eyes.3.
Do not put hot objects on or near combustible objects.4.
Do not operate the unit close to inflammable liquids or gases.5.
Do not place any liquid directly in the unit.6.
Always ensure a suitable, adequate ventilation system is used when equipment is in use.7.
Always install fireproof metal ducting with sufficient airflow.8.
Maintenance
When performing maintenance always disconnect from power supply and cool below 50°C.1.
Techne recommend regular cleaning of fluidised baths. Externally, wipe with a damp soapy cloth. No abrasive2.
cleaners. Care should be taken to prevent any water entering the unit.
Regular internal and external inspection of extraction ducting is recommend to detect any damage and3.
ensure the internals are clean. Any build-up of particles or debris discovered in the extraction ducting requires
the ducting to be cleaned or replaced.
In fluidised baths used for polymer burn-off, please regularly inspect fluidising medium, remove any foreign4.
debris and replace with clean fluidising medium as required.
Never top-up a hot fluidised bath with cold fluidising medium. Always cool below 50°C first.5.
Please note
1. Please ensure an adequate risk assessment is performed before use of a fluidised bath.
2. Please ensure the appropriate temperature is used for the application, always stay safely below the combustion
temperature of any material or sample in a fluidised bath.
3. Fluidising airflow must be switched on before heating a fluidised bath, and left operational until the baths
cools to below 50°C unless performing dead-bed calibration function.
4. Do not overfill fluidising media. The fill-level is 6 inches (15cm) below top surface when cold.
5. In fluidised baths used for polymer burn-off, always remove excess polymer from sample.
6. In applications where materials being treated produce acidic vapours during thermal decomposition,
it is recommended a fume scrubber is utilised to ensure fume emission from the plant conforms to local
regulations.
7. If you have any questions please contact [email protected].
2
SBL-1, SBL-2, SBL-2D OPERATOR’S MANUAL
CONTENTS PAGE
SAFETY and INSTALLATION
WARNING
GENERAL DESCRIPTION
OPERATOR SAFETY
TECHNICAL SPECIFICATION
INSTALLATION
OPERATION
MAINTENANCE
FAULT FINDING
ACCESSORIES AND SPARE PARTS
DECLARATION OF CONFORMITY
3
4
6
7
8
9
11
12
15
16
18
19
SaFety anD InStaLLatIOn
Please read all the information in this booklet before using the unit.
WarnIng
HIGH TEMPERATURES ARE DANGEROUS: they can cause serious burns to operators and ignite
combustible material.
Techne have taken great care in the design of these units to protect operators from hazards, but users
should pay attention to the following points:
• USE CARE AND WEAR PROTECTIVE GLOVES TO PROTECT HANDS.
• DO NOT put hot objects on or near combustible objects.
• DO NOT operate the unit close to inflammable liquids or gases.
• DO NOT place any liquid directly in your unit.
• At all times USE COMMON SENSE.
OperatOr SaFety
All users of Techne equipment must have available the relevant literature needed to ensure their safety.
It is important that only suitably trained personnel operate this equipment, in accordance with the
instructions contained in this manual and with general safety standards and procedures. If the equipment
is used in a manner not specified by Techne the protection provided by the equipment to the Operator
may be impaired.
If a safety problem should be encountered, switch off at the mains socket and remove the plug from
the supply.
SYMBOLS DEFINED
WARNING HOT
SURFACE
FIRE HAZARD RISK OF
ELECTRIC
SHOCK
HEAVY OBJECT
2 PERSON LIFT
REQUIRED
4
AFTER USE
When you have finished heating samples, remember that parts of the unit – the tubes, blocks and
associated accessories – may be very hot. Take the precautions listed earlier.
GUARANTEE
The unit is guaranteed against any defect in material or workmanship for the period specified on the
enclosed guarantee card. This period is from the date of purchase, and within this period all defective
parts will be replaced free of charge provided that the defect is not the result of misuse, accident or
negligence. Servicing under this guarantee should be obtained from the supplier.
Notwithstanding the description and specification(s) of the units contained in the Operator’s Manual,
Techne hereby reserves the right to make such changes as it sees fit to the units or to any component of
the units.
This Manual has been prepared solely for the convenience of Techne customers and nothing in this
Instruction Book shall be taken as a warranty, condition or representation concerning the description,
merchantability, fitness for purpose or otherwise of the units or components.
INSTALLATION
1. All Techne units are supplied with a power cable. This may be integral or plug-in.
2. Before connecting the mains supply, check the voltage against the rating plate. The rating plate is
on the rear of the unit. Connect the mains cable to a suitable plug according to the table below.
Note that the unit must be earthed to ensure proper electrical safety.
Connections 220/240V 110/120V
Live Brown Black
Blue WhiteNeutral
Earth Green/yellow Green
The fused plug supplied with the mains lead for the SBL-1 and SBL-2 for use in the UK is fitted
with the following value fuse to protect the cable: 13 AMP.
INSTALLATION CONDITIONS
This equipment is designed to operate safely under the following conditions:
•For indoor use only
•Use in a well ventilated are
•Ambient temperature range 5°C to 35°C (41°F to 95°F)
•Altitude to 2000m (6500ft)
•Relative humidity not exceeding 75% decreasing to 30% and free from condensation
•Mains supply fluctuations not exceeding 10% of nominal
•Overvoltage category II IEC60364-4-443
•Pollution degree 2 IEC664
3. Place the unit on a suitable bench or flat workspace, or in a fume cupboard if required, ensuring
that the air inlet vents on the underside are free from obstruction.
4. The unit must be installed with an appropriately rated switch and/or circuit breaker included in the
installation.
5. The switch or circuit breaker should also be clearly marked as the disconnecting device for the unit.
6. The supply wiring should be of a specification suitable for the ratings indicated on the rating plate.
In addition it should comply with local, national and international standards where applicable.
5
WARNING
Poor fluidisation causes hot spots, heater failure, and damage to other parts. Follow instruction book carefully. For
correct fluidisation, pay attention to;
INSTALLATION
Ensure bath is level and air supply is adequate.
OPERATION
Adjust air valve for even fluidisation.
Do not insert objects larger than recommended.
Ensure objects do not lie in contact with container wall or porous plate.
MAINTENANCE
Regularly inspect and maintain air filter to eliminate oil vapour in air supply.
ALUMINA
Should the fluidised bath be stirred for a long period of time under damp or humid conditions, moisture may be
absorbed by the alumina which is hydroscopic. To avoid violent fluidisation which occurs when damp alumina is
heated above 100°C, operate the bath for a period of approximately 8 hours at 90°C prior to operation at
elevated temperatures.
NEVER ADD COLD OR DAMP ALUMINA TO A HOT BATH AS THIS WILL ALSO CAUSE VIOLENT FLUIDISATION WHICH
CAN BE DANGEROUS. Allow the bath to cool then add the fresh alumina. If this fresh alumina is a large portion of
the charge then dry the whole charge as above.
FUME EXTRACTION
When used for processing items which may emit toxic or inflammable fumes, it is essential that an adequate fume
extraction system be installed. The extraction system must be correctly sized to ensure that any toxic fumes are
removed from the working environment.
To eliminate the risk of spontaneous ignition, the concentration of inflammable fumes above the bath and
within the exhaust duct work must be kept below the lower explosive limit.
OPERATOR MAINTENANCE
NOTE: THAT THIS EQUIPMENT SHOULD ONLY BE DISMANTLED BY PROPERLY TRAINED PERSONNEL.
REMOVING THE SIDE, FRONT OR REAR PANELS EXPOSES POTENTIALLY LETHAL MAINS VOLTAGES. THERE ARE
NO OPERATOR MAINTAINABLE PARTS WITHIN THE EQUIPMENT.
In the unlikely event that you experience any problems with your unit which cannot easily be remedied, you
should contact your supplier and return the unit if necessary. Please include any details of the fault observed
and remember to return the unit in its original packing. Techne accept no responsibility for damage to
units which are not properly packed for shipping: if in doubt, contact your supplier. See the Decontamination
Certificate supplied with your unit.
1. Cleaning
Before cleaning your unit ALWAYS disconnect it from the power supply and allow it to cool below 50°C.
Your unit can be cleaned by wiping with a damp soapy cloth. Care should be exercised to prevent water from
running inside the unit. Do not use abrasive cleaners.
2. Fuses
Your unit is protected by one or two fuses. These should only be changed by suitably qualified personnel. If the
fuses blow persistently, a serious fault is indicated and you may need to return the unit to your supplier for
repair.
6
GENERAL DESCRIPTION
The SBL-2D bath inner is a cylindrical stainless steel vessel of welded construction and inside diameter
230 mm (9"). This vessel is suspended in, but thermally insulated from, an outer mild steel cylindrical
container. The porous plate is made of either sintered or woven mesh stainless steel and is mounted across
the vessel between compression flanges. Bath insulation is provided by fibreglass but some circulation of
air is provided to prevent the outer container from getting too hot.
Each of these fluidised baths have 1kW Inconel sheathed electric heating elements mounted just above
the porous plate. The SBL-2D has four heaters. The air control valve is mounted at the right hand side
of the bath. A pneumatically operated safety switch is fitted which switches off the heating current in
the event of failure of the air supply.
Temperature control is achieved by a manually operated energy regulator. This may be by-passed by setting
it to maximum and tting an externally connected controller, the Techne TC-8D. On the SBL-2D switches
are fitted for the selection of either 1kW or 2kW or 3kW heat input but only the initial 1kW is controlled
by the energy regulator. A switch is fitted for the selection of the fourth boost heater, this heater is not
controlled by the energy regulator.
Each heater has its own neon light indicator to show when it is working.
The air supply must be from a filtered and regulated air line or alternatively a Techne air pump, F119D
for 240V or F119P for 120V, may be used. The air pump includes a safety valve and special lters and is
driven by 1/4 HP electric motor.
7
OPERATOR SAFETY
Itisimportantthatonlysuitablyinstructedpersonneloperatethisequipment. Itmustalsobeusedinaccordance
with the instructions contained in this manual and with proper safety standards and procedures.
It is imperative that all personnel who may come into contact with our equipment have available such of
our literature as they require to ensure their safety.
Principles of operation
Small solid particles can be readily ‘fluidised’ by means of a suitable gas (air) stream. Clean dry air at a
constant pressure of about 21kN/m2(3 lb/in2) from a pump, or from an air line, is supplied via a control
valve to a chamber beneath the diffuser (porous plate). This diffuser ensures a uniform flow of air across
the full section of the container and acts also as a support plate for the sand.
As the control valve is slowly opened the solid sand bed remains undisturbed and the air finds its way
between the particles; under such conditions the pressure drop is proportional to the rate of flow of air.
As the valve is opened further the air drag on the particles will cause them to separate and the whole mass
of the bed can be seen to have expanded. The bed now behaves as a fluid and is said to be ‘fluidised’.
Further opening of the valve is not accompanied by an increase in pressure drop, which remains constant
at a value corresponding to the head of the column of particles, but the bed becomes more turbulent and
will have the appearance of boiling liquid. The heat transfer and most uniform temperatures are obtained
when the bath is in this ‘boiling’ state.
Characteristic of a fluidised bath
A bath of fluidised solid particles behaves as a bath filled with an insulating non-volatile liquid and it shares
with liquid baths the desirable characteristics of accessibility, uniformity of temperature and good heat
transference. It is not, however, possible to obtain such a close temperature control as in a true liquid as
the effective specific heat of a fluidised solid is much less than that of a liquid. On the other hand this
small thermal capacity gives a rapid heat up from room temperature.
A typical heat transfer figure is 600 W/m2/°C. Mr H. Sutcliffe* has a pointed out the advantages of a
fluidised bath for testing electrical components. The only electrical leakage that takes place is by physical
transfer of charged particles so that the leakage currents are very small, being of the order of 10-9 amperes
for a potential difference of 200 volts between electrodes 10 mm square at a spacing of 5 mm.
A fluidised bath is, of course, much cleaner than an oil bath and objects do not have to be cleansed on
removal from the bath. A light dusting of the object with a brush is enough to return particles to the bath.
It is necessary to clamp vessels as the fluidised bath produces appreciable buoyancy.
* Electronic Engineering, February 1961. pp. 94-95.
Cleaning your unit
Before cleaning your unit ALWAYS disconnect from the power suppply and allow to cool below 50°C.
The outside of your fluidised bath can be cleaned by wiping with a damp soapy cloth. Care should be
exercised to prevent water from running inside the unit. Do not use abrasive cleaners.
Before using any cleaning or decontamination method, except those recommended here, the customer
should check with Techne that the proposed method will not damage the fluidised bath.
8
TECHNICAL SPECIFICATION
Minimum 50°C
Maximum 350°C
at 50°C ±1°C
at 350°C ±2°C
2 x 1 KW
1 h
2 h 30 min
240 V 50/60 Hz
120 V 50/60 Hz
Pressure 21 kN/m2(3 psi)
Max Flow 57 l/min
Diameter 315 mm
Height 470 mm
Diameter 228 mm
Usable Depth 120 mm
Net 26 kg
16 kg
Minimum 50°C
Maximum 600°C
at 50°C ±1°C
at 600°C ±3°C
3 x 1 KW
1 h 45 min
5 h
240 V 50/60 Hz
Pressure 21 kN/m2(3 psi)
Max Flow 57 l/min
Diameter 385 mm
Height 470 mm
Diameter 228 mm
Usable Depth 350 mm
Net 30 kg
SBL-1
Temperature Range
Short Term Stability
Heater power
Heat up time 20°C to 350°C
Cool down time to 200°C
Electrical supply
Air supply
Overall Dimensions excluding tap
Internal Dimensions
Weight
Alundum
Fuses
SBL-2
Temperature Range
Short Term Stability
Heater power
Heat up time 20°C to 600°C
Cool down time to 200°C
Electrical supply
Air supply
Overall Dimensions excluding tap
Internal Dimensions
Weight
Alundum
Fuses
16 kg
Contact your local sales specialist or
email [email protected] for full details
Contact your local sales specialist or
email [email protected] for full details
9
SBL-2D
Temperature Range Minimum 50°C
Maximum 600°C
at 50°C ±1°C
at 600°C ±3°C
4 x 1 KW
Note: at 230V this is 17 amp
1 h 45 min
5 h 30min
240 V 50/60 Hz
Pressure 21 kN/m2(3 psi)
Max Flow 57 l/min
Diameter 385 mm
Height 695 mm
Diameter 228 mm
Usable Depth 350 mm
Net 49 kg
Short Term Stability
Heater power
Heat up time 20°C to 600°C
Cool down time to 200°C
Electrical supply
Air supply
Overall Dimensions excluding tap
Internal Dimensions
Weight
Alundum
Fuses
32 kg
Contact your local sales specialist or
email [email protected] for full details
10
INSTALLATION
Before connecting the mains supply check the voltage with that marked on the rating plate. Connect
the mains cable to a suitable supply as follows:
CONNECTIONS 220/240V 110/120V
Live Brown Black
Neutral Blue White
Earth Green/yellow Green
The SBL-1 needs at least a 9 amp supply and the SBL-2 needs at least a 13 amp supply at a nominal 230V.
The SBL-2D will use 17 amps and needs its own separate supply capable of taking this current.
Ensure that the air control valve is closed, then connect the air inlet to the correct supply. 21 kN/m2(3 l/in2)
and up to 57 l/min (2 ft3/min) is required. It is most important that clean, dry air is used. For permanent
set-ups the use of standard hose clips is recommended at the connections.
NOTE: If the pump unit supplied by Techne is used, no adjustments are necessary and the unit can be
connected directly to the bath.
Set both the energy regulator and heater control switches to the OFF position before connecting to the
correct electrical supply.
IF THIS PRODUCT IS USED FOR PROCESSING ITEMS WHICH MAY EMIT TOXIC FUMES, IT IS ESSENTIAL
THAT AN ADEQUATE FUME EXTRACTION SYSTEM BE INSTALLED.
ALUNDUM
Should the fluidised bath be stored for long periods of time under damp or humid conditions, moisture
may be absorbed by the alundum which is hydroscopic. To avoid violent fluidisation which occurs when
damp alundum is heated above 100°C, operate the bath for a period of approximately 8 hours at 90°C
prior to operation at elevated temperatures.
NEVER ADD COLD OR DAMP ALUNDUM TO A HOT BATH AS THIS WILL ALSO CAUSE VIOLENT FLUIDISATION
WHICH CAN BE DANGEROUS. Allow the bath to cool then add the fresh alundum. If this fresh alundum
is a large proportion of the charge then dry the whole charge as above.
11
OPERATION
Fill the SBL-1 to within 40 mm (1.5" to 2") or the SBL-2 and SBL-2D to within 76 mm (3") from the 1.
top with the alundum. Make sure it is dry.
Slowly open the air control valve until the bed gives the appearance of continuous boiling. The bath2.
is now ready for use and temperature setting.
If a rapid heat-up of the bath is required, set the heater switches to ‘high’(SBL-1, 2kw, SBL-2, 3kw,3.
SBL-2D, 4kW, and set the energy regulator knob to a high value (say 8 or 9 on the scale), then as the
desired temperature is approached the knob should be slowly turned anti-clockwise to a lower reading
until control about the desired mean temperature is achieved. At this stage it may be necessary to
switch out some of the heaters.
NOTE: The energy regulator has an arbitrary scale which is not a temperature scale.
At a setting of 10 the heater will be continuously on. A little practice will soon enable rapid temperature
selection. A Techne TC-8 or TC-8D temperature controller may be connected externally into the circuit
provided the energy regulator remains set at 10.
With increase in temperature, or when objects are placed into or taken from the bath, adjustment of4.
the air control valve may be necessary, but the bed must be kept vigorously boiling.
AS THIS UNIT DOES NOT CONVEY THE EFFECTS SUCH AS VAPOUR OR SMELL NORMALLY ASSOCIATED5.
WITH HIGH TEMPERATURE BATHS, WE ADVISE THAT ONLY TRAINED OPERATORS BE ALLOWED TO
USE IT.
For the SBL-1 it has been found that under most conditions, only one heater (1kW) is required to6.
maintain temperatures in the bath up to the maximum of 350°C, the second heater only being used
as a 'boost' heater.
Heater switch positions: HIGH = 2kW
MEDIUM = 1kW
Maximum temperature for this bath: 350°C (662°F)
Heater
Selector
Switch
Energy
Regulator
12
For the SBL-2 the following table indicates the heat input required to maintain a range of temperatures,7.
with the energy regulator control:
Bath Temperature Heater Switches Energy Reg Setting
200°C (392°F) LOW 7 to 8
300°C (572°F) LOW 9 to 10
400°C (752°F) MEDIUM 2 to 3
500°C (932°F) MEDIUM 8 to 9
600°C (1112°F) HIGH 4 to 5
The third heater is only used as a ‘boost’ heater.
Maximum temperature for this bath: 600°C (1112°F).
Energy
Regulator
Heater
Selection
Switches
Heater
Selection
Indicators
13
For the SBL-2D the following table indicates the heat input required to maintain a range of temperatures, 8.
with the energy regulator control:
Bath Temperature Heater Switches Energy Reg Setting
200°C (392°F) LOW 7 to 8
300°C (572°F) LOW 9 to 10
400°C (752°F) MEDIUM 2 to 3
500°C (932°F) MEDIUM 8 to 9
600°C (1112°F) HIGH 4 to 5
The fourth heater is only used as a ‘boost’ heater.
THE FOURTH HEATER IS NOT CONTROLLED BY THE ENERGY REGULATOR AND SHOULD BE
SWITCHED OFF WHEN CONTROLL TEMPERATURE IS REACHED.
Maximum temperature for this bath: 600°C (1112°F).
Energy
Regulator
Heater
Selector
Switch
Heater
Selection
Switches
14
MAINTENANCE
This unit is designed for continuous operation and requires very little routine maintenance.
The bath level should be maintained regularly and periodically the bath should be emptied and the1.
alundum screened (or replaced).
Should the fluidised bath be stored for long periods of time under damp or humid conditions,
moisture may be absorbed by the alundum which is hydroscopic. To avoid violent fluidisation which
occurs when damp alundum is heated above 100°C, operate the bath for a period of approximately
8 hours at 90°C prior to operation at elevated temperatures.
NEVER ADD COLD OR DAMP ALUNDUM TO A HOT BATH AS THIS WILL ALSO CAUSE VIOLENT
FLUIDISATION WHICH CAN BE DANGEROUS. Allow the bath to cool then add the fresh alundum.
If this fresh alundum is a large proportion of the charge then dry the whole charge as above.
Always ensure that clean, dry air is used and that the correct electrical supply is properly2.
connected.
Periodically check the following components for damage or malfunctioning:3.
a) Porous Plate. Check for cracks, or leakage of air through the rubber seal around
the periphery
b) Heaters. Check for bad ‘scaling’ or signs of local deterioration.
c) Energy Regulator. When switched on the contacts can be heard to ‘click’ on and off
periodically except when set at 10 position.
d) Safety Switch. When the sand bed is solid, the heater circuit should be automatically
broken. With the bed just ‘fluidised’ the heater circuit should be completed. (Both tests
should be made with the energy regulator set at 10).FA
ULT FINDING
15
FAULT FINDING
The following guide has been prepared to help you get your fluidised bath back into service as soon as
possible, should a fault develop. If in doubt, please return the unit to the manufacturers for servicing.
Please refer to the next section for dismantling procedure.
Fault Action required
1 Sand Bed will not fluidise
a Air lines blocked Check all air lines and connections for leaks or
restrictions.
b Incorrect air supply Check air supply for correct pressure 21 kN/m2
(3 lb/in2) and adequate flow (up to 57 l/min)
(2ft3/min).
c Filters blocked or leaking Check all filters for leaks or restrictions.
d Control valves not working correctly Check functioning of all regulators
or control valves in the air line.
e Bed material damp If the bed material has become damp due
to spillage of liquid, etc., then empty the bath
immediately. Blow air through the porous plate
to remove all moisture and dry the bath material
by other means before replacing it in the bath.
DO NOT ATTEMPT TO DRY OUT REALLY
DAMP MATERIAL IN THE BATH ITSELF.
2 Bed ‘boiling’ erratically in one spot
a Porous plate cracked Check porous plate or its seal for cracks or
leaks. Replace porous plate if damaged.
3 Bath not heating
a Incorrect electrical supply Check supply (220/250 volts, 50/60Hz or
110/125 volts, 50/60Hz) and all external
connections.
b Energy regulator not Connect an ammeter (range up to 15 amps
functioning a.c.) into the mains lead:-
adjust the heater switch to the LOW position.
Fluidise the bed and by switching the energy
regulator to a reading of 5, observe that current
flow alternates from 0 to approx. 4.3 amps.
If no current flows at all then check items c to f
and then if necessary replace the regulator.
16
c Fail safe switch not functioning Connect an ammeter (range up to 15 amps
a.c.) into the mains lead:-
Adjust the heater switch to the LOW position
and set the energy regulator at 10. Fluidise
the bed (continuous boiling action) and
observe that the ammeter registers approx.
4.3 amps. Position the heater switches on the
SBL-1 to the HIGH position or on the SBL-2
and the SBL-2D to the MEDIUM position and
observe that a current of approx. 13 amps
ows. On the SBL-2D a similar check should
be made for the fail safe switch on the boost
heater. If this current is not registered then
check all other items; if necessary replace the
fail safe switch.
d Internal electrical wiring damaged With the electrical supply disconnected:-
remove the baseplate of the unit and carefully
check all internal wiring. Insulation meter or
resistance meter would be useful for third check.
A practical wiring layout is shown in the diagram
e Heater switch not functioning Connect an ammeter (range up to 15 a.c.) into
or heaters burnt out the mains lead:-
Adjust the heater switches to the LOW position
and set the energy regulator at 10. Fluidise
the bed and if both switch and heater function
correctly a current of approx. 4.3 amps will flow.
The top neon should also light. With the heaters
switched to HIGH on the SBL-1 or MEDIUM on
the SBL-2 or SBL-2D, a current of 8.7 amps should
ow. SBL-2 or SBL-2D: Switch set to HIGH 13
amps should flow. Replace either heater or switch
as necessary.
f Failure of pneumatic safety switch Check connecting pipe from the
(situated within outer case) control valve through to the switch.
Disconnect the rubber tube at a convenient point
and check operation of the switch by blowing into
the tube, a definite click should be heard from the
switch.
4 Bath overheating
a Energy regulator damaged Repeat checks as in 3 b above.
b Heater switch damaged Repeat checks as in 3 e above.
Alternatively, all checks in sections 3 and 4 can be carried out with the power disconnected
and by using an appropriate resistance or insulation meter.
17
Optional Accessories
Please visit www.techne-calibration.com for a full list of available accessories.
Spare Parts
Please contact your local sales specialist or email [email protected] to enquire about available
spares
ACCESSORIES AND SPARE PARTS
18
7
Declaration of Conformity is also available to view online at www.techne-calibration.com
19
Cole-Parmer Ltd - UK
Beacon Road,
Stone,
Staffordshire,
ST15 0SA,
United Kingdom
Tel: +44 (0)1785 812121
Email: cpinfo@coleparmer.com
Web: www.techne.com
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2
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