Cole Parmer BH-250 Series User manual

Cole-Parmer®
BH-250 Series
Analog Block Heaters
Instruction Manual
Version 1.3

CONTENTS PAGE
INTRODUCTION 3
BEFORE USE 4
SAFETY and INSTALLATION 5
English 5
Français 7
Deutsch 9
Español 11
Italia 13
SPECIFICATIONS 15
OPERATION 16
Installation 16
The front panel controls 17
Setting the operating temperature 18
After use 18
ADDITIONAL INFORMATION 19
Fault finding 19
Fuses 19
Safety over-temperature cut-out 19
User maintenance 19
Technial support and servicing 20
BLOCK INSERTS 21
REPLACEMENT PARTS 22
DECLARATION OF CONFORMITY 23
2

INTRODUCTION
Please read all the information in this booklet before using the unit.
Antylia Scientific Block Heaters provide a safe, dry, constant temperature source in the laboratory. The
units can be used for incubation, boiling, inactivation, wet ashing, sample concentration, enzyme
analysis and many other clinical and industrial purposes.
The units cover the temperature range from ambient +25°C to 100°C or 200°C (depending on model)
using machined aluminium alloy blocks as the heat transfer medium. Independent indicator lights
indicate mains power, heater action and over-temperature cut-out. An ON/OFF switch is mounted on the
rear panel, together with the mains connector and a double fuse holder.
The units are constructed of polyphenylene sulphide (PPS) plastic, which is strong yet lightweight and can
resist sustained temperatures as high as 260°C. Even though the units heat up rapidly, venting and highly
efficient insulation ensure that the cases remain cool enough to handle even at maximum operating
temperatures.
Each unit is supplied with an extraction tool for easy removal of the insert blocks.
The operating instructions in this Operator’s Manual cover the following range of digital Blockheaters:
Model Description Voltage,
number frequency
BH-250-2 Block Heater ambient to 100°C, accepts 2 insert blocks 230V, 50-60Hz
BH-250-2-115 Block Heater ambient to 100°C, accepts 2 insert blocks 115V, 50-60Hz
BH-250-3-HT Block Heater ambient to 200°C, accepts 3 insert blocks 230V, 50-60Hz
BH-250-3-HT-115 Block Heater ambient to 200°C, accepts 3 insert blocks 115V, 50-60Hz
The features of individual models are outlined in the Specifications section of this manual.
Note: This manual covers the analog Block Heater range. The digital Block Heaters BH-250D-2,
BH-250D-3, BH-250D-4, BH-250DC-2, BH-250D-2-HT and BH-250D-3-HT are covered in a separate user
manual.
3

BEFORE USE
Before using the Block Heater please make sure you have read this manual carefully. If there is any doubt
relating to the proper use of this equipment, the staff at Antylia Scientific Ltd. or your supplier will be
happy to assist you.
UNPACKING
When unpacking the unit please ensure that the following have been removed from the packaging:
Block Heater
6101308 Extraction tool
Mains cables (UK and EU or US)
Operator’s manual
The user is advised to keep the original packaging in case the instrument ever needs to be returned for
service or repair. Antylia Scientific Ltd. accepts no responsibility for damage incurred unless the unit is
correctly packed and transported in its original packaging.
The Block Heater range
4
BH-250-2 (230V)
BH-250-2-115 (115V)
BH-250-3-HT (230V)
BH-250-3-HT-115 (115V)

SAFETY AND INSTALLATION
Please read all the information in this manual before using the Block Heater.
WARNING
HIGH TEMPERATURES ARE DANGEROUS: they can cause serious burns to operators and ignite
combustible material.
Antylia Scientific have taken great care in the design of these units to protect operators from hazards,
but operators should pay attention to the following points:
• USE CARE AND WEAR PROTECTIVE GLOVES TO PROTECT HANDS.
• DO NOT use combustible substances near hot objects.
• DO NOT operate the instrument in the vicinity of inflammable liquids or gases.
• DO NOT place any liquid directly into the instrument.
OPERATOR SAFETY
All operators of Antylia Scientific 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 Antylia Scientific Ltd. the protection provided by the
equipment to the operator may be impaired.
All Antylia Scientific instruments are designed to conform to international safety requirements and are
fitted with an over-temperature cut-out.
If a safety problem should be encountered, switch off the unit at the mains socket and remove the plug
from the electricity supply.
INSTALLATION
The instrument should be carried using both hands. Never move or carry the instrument when in use or
connected to the mains electricity supply.
1. All Antylia Scientific instruments are supplied with a power cable; this may be integral or plug-in.
2. Before connecting the instrument to the mains electricity supply, check the voltage
against the rating plate (located on the back of the unit). Please note that the unit
must be earthed to ensure proper electrical safety. Connect the mains cable to a
suitable plug according to the table below.
Connections 230V, 50/60Hz 115V, 50/60Hz
Live Brown Black
Neutral Blue White
Earth Green/yellow Green
5

Note that units marked 230V on the rating plate work at 207V; units marked 115V work at 104V. In
both cases, however, the heating rate will degrade by approximately 8%.
3. Place the unit on a suitable flat bench or in a fume cupboard if required, ensuring that the air inlet
vents on the underside are free from obstruction.
4. Plug the mains cable into the socket on the back of the instrument.
5. Switch on the instrument. Symbols on or near the power switch of the unit have the following
meanings:
I Mains Switch On
O Mains Switch Off
Replacement cable
Should the mains lead need replacement, a cable of 1mm2of harmonized code H05VV-F connected to
an IEC320 plug should be used. IF IN DOUBT CONSULT A QUALIFIED ELECTRICIAN.
ENVIRONMENTAL CONDITIONS
The Block Heater is designed operate under the following conditions:
• Indoor use
• Ambient temperature range +5ºC to +40ºC
• Altitude to 2000m
• Relative humidity up to 80%
• Mains supply fluctuations not exceeding 10%
• Over voltage category II IEC 60364-4-443
• Pollution degree 2
• Use with a minimum distance all-around of 200mm from walls or other items
Note: The control specifications are quoted at an ambient temperature of 20ºC. The specification may
deteriorate outside an ambient temperature of between 10ºC and 30ºC.
The instrument has been tested for radio frequency interference and is certified under EN61326.
6

SÉCURITÉ ET CONSIGNES D’INSTALLATION
Veuillez lire attentivement toutes les instructions de ce document avant d’utiliser le Block Heater.
AVERTISSEMENT
Les TEMPÉRATURES ÉLEVÉES SONT DANGEREUSES car elles peuvent provoquer de graves brûlures chez
l’opérateur et enflammer les matériaux combustibles.
Antylia Scientific a apporté un soin tout particulier à la conception de ces appareils de façon à assurer une
protection maximale des opérateurs, mais il est recommandé aux utilisateurs de porter une attention
spéciale aux points suivants :
• PROCEDER AVEC PRUDENCE ET PORTER DES GANTS POUR SE PROTEGER LES MAINS
• NE PAS utiliser de matériaux combustibles auprès d’objets chauds.
• NE PAS utiliser l’appareil à proximité de liquides ou de gaz inflammables
• NE PAS verser de liquides directement dans l’appareil.
SÉCURITÉ DE L’OPÉRATEUR
Tous les utilisateurs de produits Antylia Scientific doivent avoir pris connaissance des consignes et
instructions nécessaires à la garantie de leur sécurité. Important: cet appareil doit impérativement être
manipulé par un personnel qualifié et être utilisé selon les instructions données dans ce document, en
accord avec les normes et procédures de sécurité générales. Dans le cas où cet appareil ne serait pas utilisé
selon les consignes précisées par Antylia Scientific Ltd., la protection pour l’utilisateur ne serait alors plus
garantie.
Tous les appareils Antylia Scientific sont conçus pour répondre aux normes de sécurité internationales et
sont dotés d’un coupe-circuit en cas de surchauffe.
En cas de problème de sécurité, couper l’alimentation électrique au niveau de la prise murale et enlevez
la prise connectée à l’appareil.
INSTALLATION
Porter l'appareil à deux mains. Ne jamais déplacer ou transporter l’appareil lorsqu’il est en fonctionnement
ou branché à l’alimentation électrique.
1. Tous les appareils Antylia Scientific sont livrés avec un câble d’alimentation qui peut être intégré à
l’appareil ou à raccorder.
2. Avant de raccorder l’appareil à l’alimentation électrique sur secteur, vérifier la tension
requise indiquée sur la plaque d’identification (située au dos de l’appareil). Il est
important que l’appareil soit relié à la terre pour assurer la protection électrique
requise. Brancher le câble secteur sur une prise appropriée, voir tableau ci-après.
Connexions 230V, 50/60 Hz 115V, 50/60 Hz
Phase Marron Noir
Neutre Bleu Blanc
Terre Vert/jaune Vert
Remarque : les appareils dont la plaque indique 230 V peuvent fonctionner sur 207 V, et ceux dont la
plaque indique 115 V peuvent fonctionner sur 104 V. Dans les deux cas cependant, la capacité de
chauffage diminuera d’environ 8 %.
7

3. Placer l’appareil sur une surface plane ou si nécessaire sous une hotte d’aspiration, veiller à ce que
les trous d’aération situés sous l’appareil ne soient pas obstrués.
4. Raccorder le câble d’alimentation à la prise située à l’arrière de l’appareil.
5. Allumer l'appareil. Les symboles situés sur ou à côté de l’interrupteur de l’appareil ont la signification
suivante :
I Interrupteur secteur en position Marche
OInterrupteur secteur en position Arrêt
Câble de rechange
S’il s’avère nécessaire de remplacer le cordon d’alimentation, utiliser un câble de 1 mm² conforme à la
norme H05VV-F relié à une prise IEC320. EN CAS DE DOUTE, CONSULTER UN ELECTRICIEN
QUALIFIE.
CONDITIONS ENVIRONNEMENTALES
Le Block Heater est conçu pour fonctionner dans les conditions suivantes:
• Pour un usage intérieur seulement
• Température ambiante +5°C à +40°C
• Altitudeinférieure à 2000m
• Humidité relative ne dépassant pas 80%
• Fluctuations de l’alimentation n’excédant pas 10% de la valeur nominale
• Catégorie II IEC 60364-4-443 de surtension
• Degré de pollution 2
• Utiliser à une distance minimale sur le pourtour de 200mm par rapport aux murs et autres
équipements
Remarque: Les paramètres sont indiqués pour une température ambiante de 20°C. Ces caractéristiques
peuvent se détériorer en dehors d’une température ambiante de 10 à 30°C.
L’appareil a été testé en matière de radiofréquences et est certifié selon la norme EN61326.
8

SICHERHEITS- UND INSTALLATIONSINFORMATIONEN
Lesen Sie diese Anleitung vor Verwendung des Block Heater bitte sorgfältig durch.
ACHTUNG
HOHE TEMPERATUREN STELLEN EINE GEFAHRENQUELLE DAR. Sie können schwere Brandverletzung
verursachen und brennbare Stoffe entzünden.
Antylia Scientific hat bei der Konstruktion dieses Gerätes sehr darauf geachtet, daß der Bediener vor
Gefahren geschützt ist. Dennoch sollten Sie auf die folgenden Punkte achten:
• UMSICHTIG VORGEHEN UND SCHUTZHANDSCHUHE TRAGEN
• KEINE brennbaren Stoffe in der Nähe heißer Gegenstände verwenden
• Das Gerät NICHT in der Nähe entzündlicher Flüssigkeiten oder Gase betreiben
• Flüssigkeiten NICHT direkt auf das Gerät auftragen.
SICHERHEIT DES BEDIENPERSONALS
Alle Benutzer von Antylia Scientific Geräten müssen Zugang zu der entsprechenden Literatur haben, um
ihre Sicherheit zu gewähren. Es ist wichtig, daß diese Geräte nur von entsprechend geschultem Personal
betrieben werden, das die in dieser Gebrauchsanweisung enthaltenen Maßnahmen und allgemeine
Sicherheitsbestimmungen und - vorkehrungen beachtet. Wenn das Gerät anders eingesetzt wird als vom
Hersteller empfohlen, kann dies die persönliche Sicherheit des Anwenders beeinträchtigen.
Die Geräte von Antylia Scientific entsprechen den internationalen Sicherheitsbestimmungen und sind mit
einem automatischen Übertemperaturabschalter ausgestattet.
Wenn ein Sicherheitsproblem auftreten sollte, muß das Gerät ausgeschaltet und vom Stromnetz getrennt
werden.
INBETRIEBNAHME
Das Gerät mit beiden Händen tragen. Das Gerät unter keinen Umständen transportieren, wenn es in
Betrieb ist, oder während das Gerät noch am Netz angeschlossen ist.
1. Alle Geräte von Antylia Scientific werden mit einem Netzkabel geliefert, das entweder eingesteckt
wird oder fest mit dem Gerät verbunden ist.
2. Vor dem Anschluss bitte kontrollieren, ob die Stromversorgung den Angaben auf dem
Typenschild (auf der Geräterückseite) entspricht. Um die elektrische Sicherheit zu
gewährleisten, muss dieses Gerät geerdet werden. Schließen Sie das Netzkabel
entsprechend der folgenden Tabelle an einen geeigneten Stecker an.
Anschluss 230V, 50/60Hz 115V, 50/60Hz
Phase Braun Schwarz
Neutral Blau Weiß
Erde Grün/Gelb Grün
Geräte, die für 230 Volt ausgelegt sind, können auch bei 207 Volt arbeiten, Geräte für 115 Volt auch bei
104 Volt. In beiden Fällen verringert sich die Aufheizrate um ca. 8%.
9

3. Stellen Sie das Gerät auf einen geeigneten ebenen Tisch oder in einem Abzugsschrank auf und
sorgen Sie dafür, dass die Lufteinlassschlitze auf der Geräteunterseite nicht blockiert sind.
4. Stecken Sie das Netzkabel in die Buchse auf der Geräterückseite ein.
5. Schalten Sie das Gerät ein:
I Netzschalter Ein
ONetzschalter Aus
Ersatzkabel
Bei einem eventuellen Austausch des Netzkabels wird ein Kabel vom Typ H05VV-F mit 1 mm2
Adernquerschnitt und Europastecker (IEC 320) benötigt.
IM ZWEIFELSFALL EINEN ELEKTRO-FACHMANN HINZUZIEHEN.
UMWELTBEDINGUNGEN
Der Block Heater ist für den Einsatz unter folgenden Bedingungen ausgelegt:
• Gebrauch in Innenräumen
• Umgebungstemperatur zwischen +5ºC to +40ºC
• Höhe: bis zu 2000 m
• Relative Feuchte nicht über 80%
• Netzspannungsschwankungen nicht über 10%
• Überspannungsklasse 2 IEC 60364-4-443
• Verschmutzungsgrad 2
• Der Mindestabstand zwischen dem Gerät und umgebenden Wänden oder Gegenständen muss
200mm betragen
Hinweis: Die Gerätespezifikationen beziehen sich auf eine Umgebungstemperatur von 20ºC und
können sich außerhalb des Bereichs 10ºC bis 30ºC verschlechtern.
Das Gerät wurde auf HF-Störeinflüsse geprüft und entspricht den EMV-Bedingungen nach EN61326.
10

INFORMAZIONI SULLA SICUREZZA E L'INSTALLAZIONE
Leggere attentamente il presente manuale prima di usare il Block Heater.
AVVERTENZA
Le ALTE TEMPERATURE SONO PERICOLOSE in quanto possono provocare serie ustioni agli operatori e
dare fuoco al materiale combustibile.
La Antylia Scientific ha posto particolare cura nel progettare questo strumento, al fine di proteggere gli
operatori da eventuali pericoli, ma gli utilizzatori devono prestare attenzione ai seguenti punti:
• PRESTARE ATTENZIONE ED INDOSSARE GUANTI PROTETTIVI PER LE MANI
• NON usare sostanze combustibili vicino ad oggetti caldi
• NON mettere in funzione lo strumento nei pressi di liquidi o gas infiammabili
• NON collocare alcun tipo di liquido direttamente nello strumento.
SICUREZZA DELL'OPERATORE
Il personale che utilizza l’apparecchiatura Antylia Scientific deve avere a disposizione la documentazione
necessaria al fine di assicurare la loro incolumità. È importante che solo personale adeguatamente
addestrato utilizzi questo apparecchio, in conformità alle istruzioni contenute in questo manuale e nel
rispetto delle normative e procedure generali di sicurezza. Se l’apparecchio è utilizzato in modo non
specificato da Antylia Scientific Ltd., la protezione fornita dall’apparecchiatura all’utilizzatore potrebbe
essere a rischio.
Tutte le unità Antylia Scientific sono state progettate in conformità ai requisiti internazionali di sicurezza
e sono
equipaggiate con un interruttore anti surriscaldamento.
Se si dovesse verificare qualche problema di sicurezza, disconnettere l’apparecchio dalla rete.
INSTALLAZIONE
Occorre trasportare lo strumento usando entrambe le mani. Non spostare né trasportare lo strumento
quando è in funzione o collegato all’alimentazione elettrica di rete.
1. Tutti gli strumenti Antylia Scientific sono forniti con un cavo di alimentazione; può essere integrale o
plugin.
2. Prima di collegare lo strumento all'alimentazione elettrica di rete, controllare la tensione
confrontandola con la targhetta riportante i valori nominali (si trova sul retro dell'unità).
Notare che al fine di garantire la corretta sicurezza elettrica, occorre che l'unità
sia messa a terra. Collegare il cavo di rete ad una presa idonea secondo la tabella
riportata alla pagina successiva.
Connessione 230V, 50/60Hz 115V, 50/60Hz
Sotto tensione Marrone Nero
Neutro Blu Bianco
Terra Verde/giallo Verde
11

Tenere presente che gli apparecchi riportanti sulla targhetta 230 V funzionano a 207V. Gli apparecchi
riportanti 115V funzionano a 104V. Comunque, in entrambi i casi la velocità di riscaldamento diminuirà
approssimativamente dell’8%.
3. Collocare l'unità su un banco piano idoneo o in una cappa aspirante se necessario, assicurandosi che
gli sfiati delle prese d'aria nella parte inferiore non siano ostruiti.
4. Inserire il cavo di rete nella presa che si trova sul retro dello strumento.
5. Accendere lo strumento:
I Interruttore di rete Acceso
OInterruttore di rete Spento
Cavo di ricambio
Qualora occorra sostituire il cavo di rete, si dovrà utilizzare un cavo di 1mm2codice armonizzato H05VV-F
collegato ad una spina IEC 320. IN CASO DI DUBBIO, RIVOLGERSI A UN ELETTRICISTA QUALIFICATO.
CONDIZIONI AMBIENTALI
Il Block Heater è stato progettato per funzionare nelle seguenti condizioni:
• uso interno
• range di temperatura ambiente da +5ºC a +40ºC
• altitudine massima 2000 m.
• umidità relativa non superiore all’80%
• oscillazione dell’alimentazione di rete non superiore al 10%
• categoria di sovratensione II IEC 60364-4-443
• grado di inquinamento 2
• Con distanza minima tra i lati dell’apparecchio e il muro o altri oggetti di almeno 200mm
Nota: le specifiche di controllo sono indicate ad una temperatura ambiente di 20ºC. Le specifiche
potrebbero peggiorare fuori da una temperatura ambiente compresa tra 10ºC e 30ºC.
Lo strumento è stato collaudato per interferenze da radiofrequenze ed è certificato secondo la norma
EN61326.
12

INFORMACIÓN DE SEGURIDAD E INSTALACIÓN
Lea atentamente este manual antes de utilizar el Block Heater.
ADVERTENCIA
LAS ALTAS TEMPERATURAS SON PELIGROSAS, ya que pueden ocasionar quemaduras graves a los
operarios y prender el material combustible. Antylia Scientific ha puesto gran cuidado en el diseño de
estos aparatos para proteger al usuario de cualquier peligro; aún así se deberá prestar atención a los
siguientes puntos:
• TENGA CUIDADO Y LLEVE GUANTES DE PROTECCIÓN PARA PROTEGERSE LAS MANOS
• NO utilice sustancias combustibles cerca de objetos calientes
• NO utilice el instrumento cerca de líquidos o gases inflamables
• NO coloque un líquido directamente en el instrumento.
SEGURIDAD DEL OPERARIO
Todos los usuarios de equipos Antylia Scientific deben disponer de la información necesaria para asegurar
su seguridad. De acuerdo con las instrucciones contenidas en este manual y con las normas y
procedimientos generales de seguridad, es muy importante que sólo personal debidamente capacitado
opere estos aparatos. De no ser así, la protección que el equipo le proporciona al usuario puede verse
reducida.
Todos los equipos Antylia Scientific han sido diseñados para cumplir con los requisitos internacionales de
seguridad y traen incorporados un sistema de desconexión en caso de sobre temperatura.
En caso de que surgiera un problema de seguridad, desconecte el equipo de la red.
INSTALACIÓN
El instrumento se debe transportar con las dos manos. No mueva ni lleve el instrumento cuando se utilice
o esté conectado al suministro eléctrico principal.
1. Todos los instrumentos Antylia Scientific se suministran con un cable de alimentación, que puede ser
integrado o ‘enchufable’.
2. Antes de conectar el instrumento al suministro eléctrico, compruebe que el voltaj coincida
con el indicado en la placa de régimen (situada en la parte trasera de la unidad). El
instrumento debe disponer de una toma de tierra para garantizar la seguridad
eléctrica adecuada. Conecte el cable de alimentación a un enchufe adecuado según la
siguiente tabla.
Conexión 230V, 50/60Hz 115V, 50/60Hz
Con corriente Marrón Negro
Neutro Azul Blanco
Toma de tierra Verde/amarillo Verde
13

Asegúrese de que los equipos marcados 230V en la placa indicadora funcionan a 207V y de que los
equipos marcados 115V funcionan a 104V. No obstante, en ambos casos la velocidad de calentamiento
se verá reducida en un 8% aproximadamente.
3. Sitúe la unidad sobre una mesa plana o en una campana de laboratorio si es necesario, y asegúrese
de que los orificios de ventilación situados en la parte inferior no tienen ninguna obstrucción.
4. Conecte el cable de alimentación en el enchufe situado en la parte trasera del instrumento.
5. Encienda el instrumento:
I Interruptor de alimentación encendido
OInterruptor de alimentación apagado
Cable de repuesto
Si es necesario sustituir el cable de alimentación, se debe utilizar un cable de 1mm2de código armonizado
H05VV, conectado a un enchufe IEC320. EN CASO DE DUDA, PÓNGASE EN CONTACTO CON UN
ELECTRICISTA.
CONDICIONES AMBIENTALES
El Block Heater está diseñado para utilizarse en las condiciones siguientes:
• Uso en interior
• Intervalo de temperatura ambiente +5ºC a +40ºC
• Altitud: hasta 2000 m
• Humedad relativa no superior al 80%
• Fluctuaciones del suministro eléctrico no superiores al 10%
• Categoría de sobrevoltaje II IEC 60364-4-443
• Nivel de contaminación 2
• Separado de paredes u otros objetos a una distancia mínima de 200mm
Nota: Las especificaciones de control corresponden a una temperatura ambiental de 20ºC. Las
especificaciones pueden empeorar si se utiliza el instrumento fuera del intervalo de temperatura
comprendido entre 10ºC y 30ºC.
Se han realizado pruebas para comprobar la interferencia de radiofrecuencia del instrumento, el cual
cumple la normativa EN61326.
14

SPECIFICATIONS
Specification BH-250-2 BH-250-3-HT
Blocks 2 3
Temperature Setting Rotary dial Rotary dial
Working range Ambient +5°C to 100°C Ambient +5°C to 200°C
Temperature Scale 2°C graduation 2°C graduation
Set point accuracy ±2°C ±2°C
Stability @ 40°C ±0.05°C ±0.1°C
Stability @ 100°C ±0.1°C ±0.15°C
Max variation
between blocks 0.2°C at 40°C 0.2°C at 40°C
Heat up 30-37°C 8 minutes 8 minutes
Heat up 30-56°C 12 minutes 30 minutes
Dimensions (WDH) 202 x 260 x 105mm 279 x 260 x 105mm
Electrical supply 230V or 115V 50-60Hz 230V or 115V 50-60Hz
Power 300W 450W
Shipping weight 4kg 6kg
Warranty 3 years 3 years
Note: The control specifications are quoted for an ambient temperature of 20°C for units fitted with
2, 3 or 4 insert blocks type F3506. The specification will be closely held if the ambient temperature is in
the range 10°C to 30°C. Outside this range the quoted figures may deteriorate but the unit will still work
safely.
Note: Different block inserts may take different amounts of time to equilibrate to the same temperature.
15

OPERATION
INSTALLATION
See also the sections on Safety and Installation.
1. Place the unit on a suitable flat bench or in a fume cupboard if required, ensuring that the air inlet
vents on the underside are free from obstruction.
2. Select the insert aluminium alloy block(s) appropriate for the application. A list of available blocks is
given in the section ‘Accessories’. Ensure that both the underside of the block(s) and the top of the
hotplate are clean; efficient heat conduction between these two surfaces is essential.
Top view showing three insert blocks in place
3. Place the insert blocks onto the hotplate in the well of the unit and place the tubes containing the
sample liquid in the blocks. Note: Aluminium block inserts are designed to allow for thermal
expansion up to 200°C. For this reason there will be a small air space around the blocks at ambient
temperature. The heat source is the base of the Block Heater. For best results push all the block inserts
to the right hand side so they are touching.
4. The heater design, temperature sensor and control circuit give good temperature control and
uniformity, but it is important that there is a close fit of the tubes in the block to allow efficient heat
transfer.
5. If less than the maximum number of insert blocks are fitted it is recommended that plastic half blocks
(part code F4466) are fitted to the space either side of the aluminium block. The half blocks have the
effect of reducing heat loss, thus improving temperature stability.
16

6. Plug the mains cable into the socket in the rear of the unit. Connect to the mains electricity supply
with the plug provided or one wired correctly for your supply. Switch the power ON from the switch
located next to the mains input lead. The front display will then light up.
Rear view
1. Power ON/OFF switch.
2. Mains cable socket.
THE FRONT PANEL CONTROLS
The front panel controls consist of three indicators and a rotary dial for controlling the temperature.
The front panel controls
1. Power indicator. When lit, this shows that there is power to the unit.
2. Heater indicator. When this is flashing, it indicates that the heater is heating the unit or controlling
the temperature. If the Block is above the set temperature then the indicator will be off.
3. Over-temperature indicator. If this is lit, it indicates that the unit has developed a fault and the
over-temperature cut-out has been triggered. This will cause the heater to be switched off and the
unit will begin to cool even if the heater light is on. The unit should be returned to Antylia Scientific
or its authorised agent for investigation.
4. Temperature rotary dial. Turn the dial to the desired temperature. BH-250-2 displays to 100ºC,
BH-250-3-HT displays to 200ºC
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SETTING THE OPERATING TEMPERATURE
1. Turn the temperature rotary dial to the required temperature. Note that the actual temperature of
the block critically depends on the type of block used and the quality of the thermal contact between
the base of the block and the unit.
2. The heater (and heater indicator) comes on if the set temperature is higher than the current block
temperature.
3. When the set temperature is approached, the heater indicator will begin to flash and when the
temperature is stabilised the indicator will flash slowly.
4. Due to variations in heat losses with different designs of insert block, the actual temperature may
vary. The units are calibrated using model F3506. Running a unit with only one insert block and
without the plastic half blocks will reduce the maximim achievable temperature by a few degrees.
If you need to control the temperature to a greater accuracy than the instrument's set point, place a
thermometer in the special hole in one of the blocks. For greater accuracy still, you can place the
thermometer in the sample liquid in one of the test tubes. In either of these cases it may be necessary
to re-adjust the temperature control knob or preset adjustment to achieve the precise temperature
required. Allow the temperature of the unit to stabilise after each adjustment.
5. There will be a time lag between the heater platten and the insert block achieving the set temperature
due to thermal contact between them. Guide times are shown in the specification tables.
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 in the section Safety and Installation.
We recommend that the blocks should be allowed to cool to 70°C or below before being removed from
the heating unit.
To remove an insert block, screw the extractor tool into the threaded hole and lift the block out vertically.
Never leave the extractor tool in the block while it is being used in the Block Heater.
Removing an insert block with the extractor tool
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ADDITIONAL INFORMATION
Note that this equipment should only be dismantled by properly trained personnel. Removing the outer
cover exposes potentially lethal mains voltages. There are no user serviceable parts within this equipment.
FAULT FINDING
Should you have any problems with your Block Heater which cannot be easily remedied, you should
contact your supplier and return the unit if necessary. Please include details of the fault observed and
remember to return the unit in its original packing. Antylia Scientific Ltd. accepts no responsibility for
damage to units which are not properly packed for shipping: if in doubt, contact your supplier, giving
the full serial number of the unit.
FUSES
If the display on the front panel is not lit, one of the two fuses may have blown. Check that there is no
external cause, such as a faulty plug or lead. Check both fuses and replace the faulty fuse with a new
one of the correct value (fuse values are given on the label next to the power inlet). Note that fuses
should only be replaced by a qualified electrician.
The holder for the two fuses is built into the mains input socket. First remove the power cable and then
gently prise the fuse drawer open with a flat-bladed screwdriver or similar tool. Each fuse can be
removed by using the screwdriver as a lever.
Exchange the faulty fuse in the fuse holder for a working fuse of the correct value. Finally, replace the
fuse drawer in the fuse compartment and push the drawer shut. Fuses which blow repeatedly indicate
a serious fault and you should return the unit to your supplier for repair.
Model Fuses for 230V Fuses for 115V
BH-250-2 2 x F2 Amp 2 x F4 Amp
BH-250-3-HT 2 x F4 Amp 2 x F6.30 Amp
SAFETY OVER-TEMPERATURE CUT-OUT
In the event of a fault occurring which could cause the heater to over-heat, a thermal fuse will cut in and
remove power from the heater. This will occur when the temperature reaches approximately 110°C in
the BH-250-2 model and 210°C in the BH-250-3-HT model.
USER MAINTENANCE
Before cleaning your unit, disconnect it from the power supply and allow to cool to below 50ºC. The
outer case of the Block Heater may be cleaned with a cloth dipped in water or ethanol (methanol can
also be used). No part of the case or cover should be immersed in the solvents. Do not use aggressive
solvents such as acetone or abrasive cleaners. Do not use bleach or strong acids.
Before using any cleaning or decontamination method except those recommended here, the responsible
person should check with Antylia Scientific that the proposed method will not damage the equipment.

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TECHNICAL SUPPORT AND SERVICING
If you require further technical or application assistance please contact Antylia Scientific Ltd at:
E-mail: [email protected]
Phone: [phone]
For servicing information please contact:
Antylia Scientific Ltd.
Service Department,
Beacon Road,
Stone,
Staffordshire,
ST15 0SA,
E-mail: [email protected].
Phone: [phone]
We are continually striving to improve our products and software. If you have any comments and
suggestions on how we can do things better please send them to us at: [email protected]