Grant QBA Series User manual

Block heater
QBA - QBD - QBH
Operating Manual
ES
IT
DE
FR
EN
[email protected]
www.labgearaustralia.com.au
CALL 1800 LABGEAR

32331 Ver 1 QBD, QBA, QBH,
Page 1 Operating Manual
www.grantinstruments.com
1. Safety 2
2. Operation of QBA 3
3. Operation of QBD and QBH ranges 4
4. User features QBD and QBH ranges 6
Timer 6
Alarm 7
Offset 7
Probe selection 8
Delay start / stop 9
Calibration 10
Programming (QBH only) 11
5. Maintenance 12
6. Guarantee and service 13
7. Accessories 14
8. Specification 15
9. Compliance 16
10. Declaration of Conformity Inside rear cover
Contents

QBD, QBA, QBH, 32331 Ver 1
Operating Manual Page 2
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EN
The following symbols mean:-
Caution: Read these operating instructions fully before use and pay particu-
lar attention to sections containing this symbol.
Caution: Surfaces can become hot during use.
Always observe the following safety precautions
Do not check the temperature by touch. Use a thermometer.
Do not touch surfaces which become hot during high temperature operation.
Use only as specified by the operating instructions, or the intrinsic protection may
be impaired.
To reduce the risk of eye injury during high temperature operation, use safety gog-
gles or spectacles.
After transport or storage in humid conditions, dry out the unit before connecting it
to the supply voltage. During drying out the intrinsic protection may be impaired.
Connect only to a power supply with a voltage corresponding to that on the serial
number label at the rear of the unit.
Ensure that the mains switch and power plug are easily accessible during use.
Connect only to a power supply which provides a safety earth (ground) terminal.
Before moving, allow to cool and disconnect at the power supply socket.
If liquid is spilt inside the unit, disconnect it from the power supply and have it
checked by a competent person.
It is the user’s responsibility to carry out appropriate decontamination if hazardous
material is spilt on or inside the equipment.
Clean the unit only with a damp cloth. Do not use chemical cleaning agents.
Before using any cleaning or decontamination method except those recom-
mended in this manual, users should check with Grant Instruments that the pro-
posed method will not damage the equipment.
The unit must be placed on a level, non-flammable surface away from flammable
materials and ensuring that all ventilation slots in the base are clear from obstruc-
tions.
Disconnect the mains before removing the outer cover. Note there are no user
serviceable parts inside in the unit.
Use appropriate vessels / tubes for temperature required.
The unit is for indoor use only. Check that the environmental conditions of the
laboratory are within the limits given in Section 5.
Do not use in fume cupboards containing corrosive atmospheres.
1. Safety

32331 Ver 1 QBD, QBA, QBH,
Page 3 Operating Manual
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1. Unpack the unit carefully and retain packaging for future shipment or storage.
2. The pack includes: Block heater, Mains cable, Operating instructions, Extrac-
tor tool.
3. Plug the mains cable into the socket at the rear of the unit and position to al-
low easy access to the power switch and connector.
4. Fit the desired block(s) into the heater well. Ensure that the heater bed and
the bottom of the blocks are clean in order to ensure good thermal contact be-
tween heater and blocks resulting in optimal temperature control performance.
5. Turn the unit on by pressing the mains switch on the front of the unit. The
power light will illuminate.
6. Turn the control knob to the desired temperature.
7. The block heater will now begin to heat the blocks. The heater light will illumi-
nate continuously during the heating phase but will begin to flash when the set
temperature is approached.
8. Allow the block(s) to stabilise at the set temperature before use.
9. If a more accurate temperature setting is required, use a calibrated thermome-
ter. Place in the thermometer hole in the block and adjust the set temperature
accordingly. N.B. Allow time for block to stabilise between each adjustment.
10. To turn the unit off press the mains switch on the front. Allow the unit to cool
before completing any maintenance.
Extractor tool:
The extractor tool enables the user to remove blocks safely and easily. The tool can
be stored on the rear of the unit in the mounting bracket provided. The tool should
be screwed tightly into the threaded hole/holes in the block and then the block lifted
out.
N.B. One tool is provided with the unit for use with single blocks. A second tool is
provided with the double size blocks which require the use of two tools.
2. Operation of QBA
Removable block
Mains switch
Power indicator
Heater indicator
Control knob
Mains inlet Extractor tool storage bracket

QBD, QBA, QBH, 32331 Ver 1
Operating Manual Page 4
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EN
1. Unpack the unit carefully and retain packaging for future shipment or storage.
2. The pack includes: Block heater, Mains cable, Operating instructions, Extrac-
tor tool.
3. Plug the mains cable into the socket at the rear of the unit and position to al-
low easy access to the power switch and connector.
4. Fit the desired block(s) into the heater well. Ensure that the heater bed and
the bottom of the blocks are clean in order to ensure good thermal contact be-
tween heater and blocks resulting in optimal temperature control performance.
5. Turn the unit on by pressing the mains switch on the front of the unit. The dis-
play will illuminate showing the current temperature of the block.
6. Press the ‘S’ button and adjust the set temperature using the knob. Press ‘S’
to select the temperature or press ‘F’ to exit without changing the value.
7. The block heater will now begin to heat the blocks. The heater light will illumi-
nate continuously during the heating phase but will begin to flash when the set
temperature is approached.
8. Allow the block(s) to stabilise at the set temperature before use.
9. To turn unit off, press the mains switch on the front. The set temperature will
be stored in memory. Allow unit to cool before completing any maintenance.
Extractor tool:
The extractor tool enables the user to remove blocks safely and easily. The tool can
be stored on the rear of the unit in the mounting bracket provided. The tool should
be screwed tightly into the threaded hole/holes in the block and then the block lifted
out.
N.B. One tool is provided with the unit for use with single blocks. A second tool is
provided with the double size blocks which require the use of two tools.
3. Operation of QBD,QBH
Mains switch
Fault indicator
Heater indicator
Control knob
Removable block
Mains inletDisplay
(F)unction & (S)elect buttons
Extractor tool storage bracket

32331 Ver 1 QBD, QBA, QBH,
Page 5 Operating Manual
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Heating Error Detection (QBD\QBH)
If the processor detects an error in heating the fault light will illuminate, the buzzer
will beep and the display will flash . To reset this fault; switch the unit off and
on. If the fault re-occurs contact your local service agent or Grant Instruments: con-
tact details can be found towards the rear of this manual.

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Operating Manual Page 6
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EN
The digital range of products also contain the following user features:
Timer
Alarm
Offset
Probe selection
Delay Start and Stop
Calibration
Programming (QBH only)
Timer
The timer is used to count down a time period in the range of 1 to 999 minutes. A
buzzer signifies time up, but the heater control is not affected.
1 Press F to enter main menu.
2 Rotate control knob until display shows .
3 Press S to select timer control.
4 Display will show  or . Rotate knob to desired state and press S to select
state.
5 If  is selected the display will flash and show number of minutes. Rotate the
control knob until the desired value is displayed and press S to select. If  is
selected the display will return to the actual temperature.
6 If the timer is set the display will alternate between actual temperature and
time left on the timer.
7 Once the timer has counted down to zero the buzzer will sound and the display
will alternate between  and actual temperature1.
8 To cancel the buzzer press either F or S key. The buzzer will cancel automati-
cally after 5 minutes.
9 If the main power to the unit fails the timer will revert to 2.
Notes:
1 The heater control is not affected by the timer, normal operation continues.
2 The timer value will be retained in memory after the main power has been
turned off.
4. User features - QBD, QBH

32331 Ver 1 QBD, QBA, QBH,
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Alarm
The alarm is a deviation alarm, settable from 0.5 to 10 ºC. If the actual temperature
deviates from the set point by more than the value selected the alarm will sound and
the fault lamp illuminates. It is only activated once the actual value has been within ±
0.2 ºC of the set value for 2 minutes. It does not affect the normal operation of the
unit.
1 Press F to enter main menu.
2 Rotate control knob until display shows .
3 Press S to select alarm control.
4 Display will show  or . Rotate knob to desired state and press S to se-
lect.
5 If  is selected the display will flash and show the current set value. Rotate
control knob until desired value is shown. (The alarm limit is ± 0.5oC to
±10.0oC) If  is selected the display will return to the actual temperature.
6 Press S to set alarm state once the desired value has been selected.
7 The display will return to actual temperature. No indication is given that the
alarm is set.
8 If the temperature is outside the limit set for more than 10 seconds, the buzzer
will sound and the display will alternate between actual temperature and .
9 To reset the alarm press either F or S key. If the alarm conditions still exist the
alarm will re-activate after 10 seconds.
10 To disable the alarm feature select  at point 4 above.
Note:
The alarm value and set state condition are retained in memory.
Offset
The offset feature allows the user to change the temperature from +3ºC to –7 ºC in
order to allow single point calibration.
1 Press F to enter main menu.
2 Rotate control knob until display shows .
3 Press S to select offset control.
4 The display will flash and show current value. Rotate the control knob until de-
sired value is shown.
5 Press S to confirm the offset value.
6 To cancel the offset, set the value to ..

QBD, QBA, QBH, 32331 Ver 1
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EN
Probe Selection
By using the optional external probe, it is possible to control the temperature of a
sample, a dummy sample or the block directly. Ensure the probe is maintained in
contact with either a sample or the block during the course of the experiment. Fail-
ure to maintain this contact could result in the probe monitoring an air temperature
or, another non-specific temperature. This could result in the temperature exceeding
the set point and an error condition occurring (see “Errors” below). Grant has pro-
vided this function to protect accidental operation when the external probe has been
‘selected’ but is not used. When selected the external probe may be calibrated by
the procedure described on page 10.
To select the external probe, complete the following procedure:
1 Press F to enter main menu.
2 Rotate control knob until display shows .
3 Press S to select probe selection.
4 The display will show which probe type is currently selected.  for internal
and  for external.
5 Rotate the control knob until the desired probe is shown.
6 Press S to select the desired probe.
Errors:
1. The external probe should be plugged in before it is selected. If the
probe is not connected to the unit or disconnected the message  will be
displayed.
2. If a difference of 40°C or more is detected between the internal and
external probe then  will be displayed.
- This condition might occur if the external probe is not in direct contact with a
sample, a dummy sample or the block.
- This error can also occur if the external probe is placed in a cool sample
which is then placed in a pre-warmed block.
To remove an error 3, ensure the external probe is indeed in direct contact
with the chosen target and there is not a difference of more than 40oC between
the block (measured by the internal probe) and the external probe.
As the sample heats-up, the heater will switch on again as the difference be-
comes less than 40oC. Therefore the user can wait and err3 will clear.
N.B. Should experimental conditions require a difference of 40oC or more be-
tween the block and the external probe, please contact Grant to discuss other
options.

32331 Ver 1 QBD, QBA, QBH,
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Delay Start and Stop
The delay start and stop provides a means of turning the heater control on or off af-
ter a specified period of time.
1 Press F to enter main menu.
2 Rotate control knob until display shows .
3 Press S to select delay control.
4 Display will show  or , rotate knob to desired state. Press S to select
state.
5 If  is selected the display will show either (delayed start) or 
(delayed stop). Using the control knob select which type of delay is required.
6 Press S to select.
7 The display will flash and show the number of minutes delay. Rotate the con-
trol knob until the desired value is displayed and press S to select.
Notes:
1 During delayed start the display will alternate between  and the actual
temperature.
2 During delayed stop the unit will continue to respond as normal. Once the de-
layed period has expired the temperature control will be turned off and the dis-
play will alternate between  and the actual temperature. To return to nor-
mal operation press either the S or F keys.

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EN
Calibration
The calibration procedure allows the user to calibrate the unit over a wide tempera-
ture range. Note that the probe used will be the probe selected as described on
page 8.
A calibrated thermometer will be required to measure the temperature of the block.
The adjusted readings entered must be within ± 5ºC of the original reading.
1 Set the temperature of the unit to 35°C in the normal manner and allow the unit
to stabilise.
2 Press F to enter main menu.
3 Rotate control knob until display shows . Press S to select.
4 The display will show  for one second then . Rotate to a value of
0004 and press S to select.
5 Rotate the control knob until the display shows . Press S to select.
6 The display will show the current temperature value. Using the control knob
change the value to match that of the calibrated thermometer.
7 Press S to select the new value. The display will revert to the non-adjusted ac-
tual temperature.
8 Set the temperature of the unit to 75°C and allow the unit to stabilise.
9 Press F to enter main menu.
10 Rotate control knob until display shows . Press S to select.
11 The display will show  for one second then . Rotate to a value of
0004 and press S to select.
12 Rotate the control knob until the display shows . Press S to select.
13 The display will show the current temperature value. Using the control knob
change the value to match that of the calibrated thermometer. N.B. If the read-
ing is over 3 degrees out the unit will continue to flash the display. In this case
turn the unit off and allow to cool. Then remove the blocks and clean the
heater bed and bottom of the blocks and start the procedure again.
14 Press S to select the new value. The display will revert to the non-adjusted ac-
tual temperature.
15 Press F to enter main menu.
16 Rotate control knob until display shows . Press S to select .
17 The display will show  for one second then . Rotate to a value of
0004 and press S to select.
18 Rotate the control knob until the display shows . Press S to select.
19 The display will now display the actual adjusted temperature using the calibra-
tion values entered.
To return to factory settings complete the following:
1 Press F to enter main menu.
2 Rotate control knob until display shows . Press S to select.
3 The display will show  for one second then . Rotate to a value of
0004 and press S to select.
4 Rotate the control knob until the display shows . Press S to select.

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Programming (QBH with external probe only)
The QBH is capable of running a simple program consisting of three temperature
and time segments and an end phase. All the temperature/time segments must be
set even if only 2 steps are required. An external probe must be fitted to edit or run a
program.
1 Press F to enter main menu.
2 Rotate control knob until display shows . Press S to select.
3 Rotate the control knob to show  or . Press S to select state. (On
or Off will return the display to actual temperature. On runs the program, Off
returns to normal operation).
4 If is selected the display will show (section 1) then  (set point).
5 Press S to select.
6 The display will flash and show the current set value. Rotate the control knob
until the desired value is displayed and press S to select.
7 The display will show t (time). Press S to select.
8 The display will flash and show the time in minutes. Rotate the control knob
until the desired value is displayed and press S to select.
9 The display will show  (section 2).
10 Repeat steps 6 to 10 above for sections 2 and 3.
11 The display will show  (section 4), press S to select.
12 The display will show  (buzzer) press S to select.
13 By rotating the control knob the display will show or. Press S to select
state of buzzer when the program finishes (it will sound for 1 minute).
14 The display will show (heater control). Press S to select.
15 By rotating the control knob the display will show or. Press S to select
state of heater control when the program finishes. If Off is selected the heater
is switched off after the last step and there is no temperature control. If On is
selected the unit will return to normal operation.
16 The unit is now programmed; to run the program:
17 Press F to enter main menu.
18 Rotate control knob until display shows . Press S to select.
19 By rotating the control knob the display will show  or . Select On
and press S. (If external probe is not selected  will be displayed).
20 To cancel the program complete steps 18 to 21 but select Off.
Notes:
1. When running a program the display will alternate as follows: When heating up
the display will alternate between  and the actual temperature. When tem-
perature has been achieved the display will alternate between time left, step
number and actual temperature.
2. The time count down for each step is only started once the actual temperature
is within 1 ºC of the set temperature.

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EN
5.Maintenance
All products covered in this manual are designed to comply with IEC61010-1 and
can be flash tested. Some are fitted with radio frequency interference suppressers.
Therefore it is recommended that only a D.C. test be performed.
No other routine service is required.
Cleaning
The case can be cleaned with a damp cloth after disconnection. Do not use sol-
vents.
Before using any decontamination or cleaning method except that recommended,
check with our Service Department that the proposed method will not damage the
equipment.
Replacement of fuses
Disconnect from the power supply socket.
Remove the IEC power plug from the rear of the unit. Pull out the fuse drawer, re-
place the fuse with the correct type, and replace the fuse holder.
The fuses are ceramic quick acting, rated:
Model Fuse Rating (Amps) Model Fuse Rating (Amps)
230V QBA1 2 120V QBA1 2
QBA2 2 QBA2 3.15
QBD1 2 QBD1 2
QBD2 2 QBD2 3.15
QBD4 3.15 QBD4 5
QBH2 2 QBH2 3.15
Routine safety tests
If routine tests are to be made, we recommend a test of the integrity of the protec-
tive earth conductor and an insulation test at 500 V d.c. Routine flash tests are not
recommended for any electrical equipment, because repeated high voltage tests
degrade insulation materials.

32331 Ver 1 QBD, QBA, QBH,
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6.Guarantee and Service
Guarantee
When used in laboratory conditions and according to these working instructions, this
product is guaranteed for THREE YEARS against faulty materials or workmanship.
Extended warranty for years four and five can be purchased by contacting our sales
department at [email protected].
Service
There are no user serviceable parts inside the unit.
For service return for repair to our Service Department in the UK or in other coun-
tries to our distributor.
Please do not return the blocks.
Service Address:
Service Department
Grant Instruments (Cambridge) Ltd
Shepreth
Cambridgeshire
SG8 6GB
England.
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
At Grant we are continuously trying to improve the performance we offer our cus-
tomers. If you have any feedback on Grant’s products or services we would like to
hear from you. Please send all feed back to:
Quality Manager
Grant Instruments (Cambridge) Ltd
Shepreth
Cambridgeshire
SG8 6GB
England.
Tel: [phone]
Fax: [phone]
E-mail: [email protected]

QBD, QBA, QBH, 32331 Ver 1
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EN
7.Accessories
Only use genuine Grant products with your block heater. The following accessories
are available from Grant Instruments, or our local distributor.
Single Blocks Double size blocks for QBA2,QBD2 and QBH
Grant Part no. Description Grant Part no. Description
QB-0 Plain QDP-H 0.2ml
QB-10 10mm holes QDP-FL 96-well plate
QB-12 12mm holes
QB-13 13mm holes
QB-16 16mm holes
QB-17H 17mm holes Polycarbonate safety covers
QB-18 18mm holes QBL1 Cover for QBA1,QBD1
QB-24 24mm holes QBL2 Cover for QBA2,QBD2,QBH2
QB-50 50mm holes QBL4 Cover for QBD4
QB-H 0.2ml micro tube
QB-E0 0.5ml micro tube External Probe
QB-E1 1.5ml micro tube QBEP External Pt1000 sensor
QB-E2 2.0ml micro tube
QB-E5 5.0ml micro tube
Special blocks can be made to order. Please contact Grant Instruments at
[email protected] for details.

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8.Specification
Model variations Minimum Setting Temperature ºC Max Temperature ºC Stability @ 37 ºC within block Uniformity @ 37 ºC within block Number of blocks Setting resolution ºC Display resolution ºC Heat up time 25 to 100 ºC minutes External probe socket Width x height mm
QBA/QBAL 0 100 ±1.0 ±1.0 1&2 2 2 25 no 200 x100
QBD/QBDL 15 130 ±0.1 ±0.1 1,2&4 0.1 0.1 20 yes 200 x100
QBH/QBHL 15 200 ±0.1 ±0.1 2 0.1 0.1 20 yes 200 x100
Block varia-
tions
Length Heater
power
(watts)
230/110V
All block heaters are fitted with a thermal fuse which
operates at a temperature of 230°C.
1 block 230 150/100
2 block 280 300/200
4 block 380 600/400
Operating Temperature 5 to 40°C
Maximum relative humidity 80 % r.h. in room temperatures up to 31°C decreasing
linearly to 50 % r.h. at 40°C
Altitude Up to 6,500 feet (2,000 m) above sea level
Supply Specifications
Voltage Frequency Power
QBA1
QBA2
QBD1
QBD2
QBD4
QBH2
230V ±10% 50-60Hz 200VA
350VA
200VA
350VA
700VA
350VA
QBA1L
QBA2L
QBD1L
QBD2L
QBD4L
QBH2L
120V ±10% 50-60Hz 150VA
300VA
150VA
300VA
550VA
300VA

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EN
9.Compliance
WEEE Directive
In Europe, at the end of its life the block heater must be disposed of in accordance
with the WEEE directive, For information regarding WEEE collections in the UK
please contact our B2B Compliance Scheme directly on 01691 676 124
Grant Instruments complies fully with the Waste Electrical & Electronic Equipment
(WEEE) regulations 2006. We are a member of the B2B compliance scheme
(Scheme Approval Number WEE/MP3338PT/SCH), which handle our WEEE obli-
gations on our behalf. Grant Instruments have been issued with a unique registra-
tion number by the Environmental Agency, this reference number is WEE/
GA0048TZ.
For other countries please contact your equipment supplier.
For General WEEE information please visit: www.b2bcompliance.org.uk
RoHS Directive
All the products covered by this manual comply with the requirements of the RoHS
Directive (Directive 2002/95/EC). This means the products are free of Lead and
other hazardous substances covered by the directive.
Electrical safety and Electromagnetic compatibility
All the products covered by this manual comply with the requirements of the Low
Voltage Directive (2006/95/EC) for Electrical safety and the EMC directive
(2004/108/EC) for Electromagnetic compatibility. See the Declaration of Conformity
on the inside back page

32331 Ver 1 QBD, QBA, QBH
Page 1 Manuel d’utilisation
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1. Sécurité 2
2. Fonctionnement du QBA 3
3. Fonctionnement des gammes QBH et QBD 4
4. Options d’utilisation des gammes QBH et QBD 6
Minuterie 6
Alarme 7
Compensation 7
Sélection de la sonde 8
Démarrage / Arrêt différés 9
Étalonnage 10
Programmation (QBH uniquement) 11
5. Entretien 12
6. Garantie et réparation 13
7. Accessoires 14
8. Spécifications 15
9. Conformité 16
10. Déclaration de conformité troisième de couverture
Table des matières

QBD, QBA, QBH, 32331 Ver 1
Manuel d’utilisation Page 2
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FR
Signification des symboles suivants :
Attention : lisez entièrement ces instructions d’utilisation avant l’emploi,
en prêtant une attention particulière aux sections contenant ce symbole.
Attention : Les surfaces peuvent être très chaudes pendant l’utilisation.
Respectez toujours les précautions de sécurité suivantes
Ne vérifiez pas la température au toucher. Utilisez un thermomètre.
Ne touchez pas les surfaces chauffantes pendant le fonctionnement à haute tempéra-
ture.
Utilisez toujours l’appareil conformément aux instructions d’utilisation, faute de quoi sa
protection intrinsèque peut être diminuée.
Pour réduire le risque d’accident oculaire lors du fonctionnement à haute température,
utilisez des lunettes de sécurité.
Après le transport ou le stockage en environnement humide, séchez l’appareil avant
de le raccorder à l’alimentation électrique. La protection intrinsèque peut être diminuée
pendant le séchage.
Ne le raccordez qu’à une alimentation délivrant une tension correspondant à celle ins-
crite sur la plaque signalétique située à l’arrière de l’appareil.
Vérifiez que le commutateur d’alimentation et la fiche sont facilement accessibles pen-
dant l’utilisation.
Raccordez l’appareil uniquement à une prise électrique offrant une borne de sécurité à
la terre (masse).
Avant de le déplacer, laissez refroidir l’appareil et déconnectez-le de la prise de cou-
rant.
Si vous renversez un liquide à l’intérieur de l’appareil, débranchez-le de l’alimentation
électrique et faites-le vérifier par une personne qualifiée.
L’utilisateur est responsable de la mise en œuvre de la méthode de décontamination
appropriée si des produits dangereux ont coulé sur ou dans l’appareil.
Nettoyez l’appareil uniquement avec un chiffon humide. N’utilisez pas de détergents
chimiques.
Avant d’appliquer une méthode de nettoyage ou de décontamination autre que celles
recommandées dans ce manuel, vérifiez auprès de Grant Instruments que la méthode
envisagée ne risque pas d’endommager l’appareil.
Installez l’appareil sur une surface plane non inflammable à l’écart de toute matière inflam-
mable en vérifiant que toutes les fentes d’aération de la base sont dégagées.
Débranchez-le du secteur avant de retirer le capot externe. Notez que l’appareil ne
contient aucune pièce réparable par l’utilisateur.
Utilisez les récipients / tubes appropriés à la température atteinte.
L’appareil est exclusivement destiné à une utilisation à l’intérieur. Vérifiez que les
conditions environnementales du laboratoire se situent dans les limites indiquées dans
la section 5.
Ne pas utiliser dans des sorbonnes contenant des atmosphères corrosives
1. Sécurité

32331 Ver 1 QBD, QBA, QBH
Page 3 Manuel d’utilisation
www.grantinstruments.com
1. Déballez soigneusement l’appareil et conservez l’emballage pour expédition
ou stockage ultérieur de l’appareil.
2. Le colis comprend : le bloc chauffant, le cordon d’alimentation, les instructions
d’utilisation, l’extracteur.
3. Branchez le cordon d’alimentation à la prise située à l’arrière de l’appareil et
positionnez ce dernier de sorte à pouvoir accéder facilement au commutateur
d’alimentation et au connecteur.
4. Installez le(s) bloc(s) voulu(s) dans la cavité de l’appareil. Vérifiez que le fond
de l’appareil et le dessous des blocs sont propres afin d’assurer un bon
contact thermique entre l’élément chauffant et les blocs pour obtenir des per-
formances optimales de régulation de la température.
5. Mettez l’appareil en marche en appuyant sur le commutateur d’alimentation
en façade. Le témoin d’alimentation s’allume.
6. Tournez le bouton de réglage sur la température désirée.
7. Le bloc chauffant commence à chauffer les blocs. Le témoin de chauffage
s’allume fixement pendant la phase de chauffage mais commence à clignoter
lorsque l’appareil approche de la température programmée.
8. Laissez le(s) bloc(s) se stabiliser à la température réglée avant de les utiliser.
9. Si un réglage de température plus précis est nécessaire, utilisez un thermo-
mètre étalonné. Placez-le dans l’orifice du thermomètre dans le bloc et ajustez
la température réglée en conséquence. N.B. Laissez le bloc se stabiliser entre
les ajustements.
10. Pour éteindre l’appareil, appuyez sur le commutateur d’alimentation en faça-
de. Laissez l’appareil refroidir avant toute intervention d’entretien.
Extracteur de bloc :
L’extracteur de bloc permet de retirer les blocs facilement et en toute sécurité. L’ex-
tracteur peut être rangé à l’arrière de l’appareil sur le support prévu à cet effet. Vis-
sez correctement l’extracteur dans le(s) orifice(s) fileté(s) du bloc, puis soulevez le
bloc pour l’extraire.
N.B. Un extracteur est livré avec l’appareil pour utilisation avec les blocs simples.
Un deuxième extracteur est livré avec les blocs doubles nécessitant l’utilisation de
deux outils.
2. Fonctionnement du QBA
Bloc amovible
Interrupteur
d’alimentation
Indicateur
d’alimentation
Indicateur de
chauffage
Bouton de réglage
Entrée secteur Support de rangement pour extracteur