Grant Instruments QBD2 Istruzioni per l'uso

Block heater

QBA - QBD - QBH

Operating Manual

ES

IT

DE

FR

EN

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

www.grantinstruments.com

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 inlet Display

(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.

QBD, QBA, QBH, 32331 Ver 1

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,

Page 7 Operating Manual

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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

Operating Manual Page 8

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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,

Page 9 Operating Manual

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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.

QBD, QBA, QBH, 32331 Ver 1

Operating Manual Page 10

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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.

32331 Ver 1 QBD, QBA, QBH,

Page 11 Operating Manual

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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.

QBD, QBA, QBH, 32331 Ver 1

Operating Manual Page 12

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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,

Page 13 Operating Manual

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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: +44 (0) 1763 260 811

Fax: +44 (0) 1763 262 410

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: +44 (0) 1763 260 811

Fax: +44 (0) 1763 262 410

E-mail: [email protected]

QBD, QBA, QBH, 32331 Ver 1

Operating Manual Page 14

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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.

32331 Ver 1 QBD, QBA, QBH,

Page 15 Operating Manual

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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

QBD, QBA, QBH, 32331 Ver 1

Operating Manual Page 16

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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

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