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Summary of Contents for Lauda RA 12
- Page 1 Operating instructions Alpha Immersion Thermostat Heating Thermostats A 6, A 12, A 24 Cooling Thermostats RA 8, RA 12, RA 24 Read the instructions prior to performing any task!
- Page 2 Manufacturer LAUDA DR. R. WOBSER GMBH & CO. KG Laudaplatz 1 97922 Lauda-Königshofen Germany Telephone: +49 (0)9343 503-0 Fax: +49 (0)9343 503-222 E-mail info@lauda.de Internet http://www.lauda.de Q4WA-E_13-004-EN English Translation of the original operating instructions Release 7/2022 M replaces release 12/2022 L, 09/2020 j, 08/2020i...
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Page 3: Prefixed Safety Notes
Prefixed safety notes Before operating the equipment please read carefully all the instructions and safety notes. If you have any questions please phone us! Follow the instructions on setting up, operation etc. This is the only way to avoid incorrect opera- tion of the equipment and to ensure full warranty protection. -
Page 4: Table Of Contents
Table of content Prefixed safety notes ..................................3 SAFETY NOTES.................................... 6 ............................... 6 ENERAL SAFETY NOTES ................................7 THER SAFETY NOTES BRIEF OPERATING INSTRUCTIONS ............................ 8 CONTROL AND FUNCTIONAL ELEMENTS ........................10 UNIT DESCRIPTION ................................15 ............................15 NVIRONMENTAL CONDITIONS .................................. - Page 5 7.11.4 Unlock the overtemperature protection ........................32 7.11.5 Pump-motor supervision: Overload ......................... 32 7.11.6 Fault list “Alarms and Errors” ............................ 33 MAINTENANCE ..................................34 .................................... 34 LEANING ..................................34 AINTENANCE 8.2.1 Service intervals ................................34 8.2.2 Testing the heat transfer liquid ..........................35 8.2.3 Maintenance of the refrigeration unit ........................
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Page 6: Safety Notes
Safety notes General safety notes The units are designed for operation with non-flammable liquids to DIN EN 61010-2-010. A laboratory thermostat is intended for heating, cooling and pumping liquids according to the needs of the user. This leads to hazards by high or low temperatures, fire, and the general hazards due to the application of electrical energy. The user is largely protected through the application of the appropriate standard specifications. -
Page 7: Other Safety Notes
Other safety notes Check the device carefully for shipping damage before putting into operation. Never start a damaged device! Only technically qualified personnel must operate the equipment! Connect the unit only to grounded mains power (PE). Parts of bath covers (types Alpha RA xx) may reach surface temperatures above 70 °C when operating at higher ... -
Page 8: Brief Operating Instructions
Brief operating instructions This brief instruction shall give you the possibility to operate the unit quickly. For safe operation of the unit it is absolutely necessary to read all the instructions and safety notes carefully! 1. Assemble unit and add items as appropriate ( 6). 2. - Page 9 Display flashes. Set Setpoint Bath temperature Setpoint with . Value is accepted 2 % 3 after 4 seconds or proceed immedi- S E t ately with the key: ( 7.4) Standard ( blinking in timer mode) Flashing display “00.00” (preset) for inactive timer or “hh.mm”...
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Page 10: Control And Functional Elements
Control and functional elements Alpha immersion thermostat 1 Temperature controller with four segment LED display 2 Heater active (yellow LED is lit) Cooler active (blue LED is lit) Error signal (red LED is flashing) 3 Menu functions, select and Enter keys 4 Mains switch 5 Screw clamp 6 Tubular heater... - Page 11 1 Reset button (press only if the display shows SAFE 2 Cooler cable 3 Rating label 4 Mains cable 5 Screw clamp 7/2022 Alpha 11 / 52...
- Page 12 1 Control head with clamp 2 Bath vessel 3 Four mounting feet 12 / 52 Alpha 7/2022...
- Page 13 Alpha Cooling Thermostat 1 Control head 2 Pump connections: return to bath and pump outflow 3 Bath cover 4 Handle on front and back 5 Removable front cover 6 Grille on both sides 7 Four mounting feet 7/2022 Alpha 13 / 52...
- Page 14 1 Mains cable 2 Rating label 3 Cooler cable 4 Bath drain nozzle 14 / 52 Alpha 7/2022...
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Page 15: Unit Description
Unit description Environmental conditions The operation of the thermostats is only allowed under the following conditions as specified in DIN EN 61010-1 and DIN EN 61010-2-010: Indoor use, no outdoor installation. Operation of the device up to an altitude of 2000 m above sea level. ... -
Page 16: Materials
All heating types A 6, A 12 and A 24 are not supplied with bath covers. Cooling coil, bath cover and external circulation set can be ordered as accessory ( 9). A pump outflow reducer avoids to spill over liquid in small baths (A 6, RA 8, A 12, RA 12). 16 / 52... -
Page 17: Unpacking
(expeditor); a notification to the freight forwarder (expeditor) is obligatory so that the shipment can be examined. Please also inform the LAUDA Service ( 8.5). -
Page 18: Preparations
Preparations Assembly and Setting Up Do not connect with power mains before assembly and setup is complete!! Place the unit on a flat surface. If necessary, attach the appropriate pump outflow reducer R onto the pump nozzle. In small baths use the pressure reducer to pre- vent any splashing of heat transfer liquid. - Page 19 Carefully attach the immersion thermo- stat to prevent it dropping into the bath. If this should occur during operation, never reach into the bath! Withdraw the mains plug immediately! Hang the thermostat into the bath and fix the clamp with the knurled screw on the edging of the bath.
- Page 20 When operating as bath thermostat without external consumer the pump outflow connec- tion has to be linked to the return. At bath temperature above 70 °C the label “HOT sur- face” supplied must be affixed on the bath at clearly visible position! ...
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Page 21: Filling And Emptying
Filling and Emptying Filling Close the drain nozzle. Fill baths up to a maximum level of 20 mm be- low the bath bridge. Optimum operation at 20 – 40 mm below the bath bridge. Operation is possible down to 70 mm below the ... -
Page 22: Heat Transfer Liquids And Hoses
Temperature Catalogue Tubing type Application [mm] range °C number EPDM-tubing, for all LAUDA heat transfer liquids 9 x 2 10 – 90 RKJ 111 non-insulated except for Ultra 350 and mineral oils EPDM-tubing, for all LAUDA heat transfer liquids 12 x 2 10 –... - Page 23 , sodium carbonate) per liter of water. LAUDA Alpha thermostats can be operated ideally with LAUDA Aqua 90, available in container sizes of 5, 10 or 20 liters (order number LZB 120, LZB 220 or LZB 320) or with Kryo 30 ( 6.3).
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Page 24: Connection Of External Circuits
Connection of external circuits Operation as circulation thermostat An external circulation set is installed as standard for cooling thermostats and available as accessory for immersion and heating thermostats ( 9). Assembly for immersion/heating thermostats only: Pull out the mains plug! Fix the external circulation set at the bottom of the control ... -
Page 25: Starting Up
Starting up Connection to the supply Compare the supply voltage with the data on the rating label (rearside on control head). Connect the unit only to a grounded mains power socket (PE). No warranty when the thermostat is connected to a wrong supply! Please make sure that your mains plug is equipped with at least the following safety fuses (... -
Page 26: General Key Functions And Pilot Lamps
General key functions and pilot lamps Your Alpha Thermostat is easy to operate. Switch from the current bath temperature display to the main menu; activates input, display flashes; Enter Key saves input, display ceases to flash and menu point is left. ... -
Page 27: Temperature Setpoint Setting Se T
Temperature setpoint setting The setpoint is the temperature, which the thermostat should reach and maintain constant. Press key to show (Setpoint). Press, display flashes. Decrement or increment the Temperature Setting ( 7.3). (Temperature can be set from -25 °C up to 100 °C depending on limits “Hi”... -
Page 28: Defining Temperature Limits H I And L O
Defining temperature limits With this function, it is possible to define a minimum and a maximum temperature in which the thermostat controls. By reaching the temperature limits, a warning appears. In this way setpoint input can be prevented which may damage the heat transfer medium or the apparatus. -
Page 29: Offset For The Internal Temperature Probe Cal
Calibration should only be activated if a sufficiently accurate temperature measurement device is available as reference. If, during checking with a calibrated reference thermometer, (for example from the LAUDA DigiCal Series), a devia- tion is found, then the offset (i.e. the additive part of the characteristic) of the internal measuring chain can be adjusted with the following function. -
Page 30: Standby Stby
When an error occurs switch off the device. If the error is always present after switching on the device, please inform the LAUDA Service ( 8.5) or the local service organisation! Find cause of alarm, warning or error and rectify where necessary. Then press on the control head in order to re- move the message. -
Page 31: Overtemperature And Low Level Protection
If it takes more then 45 seconds for the overtemperature protection to get triggered immediately cut out the power manually and have the equipment checked by the LAUDA Service or the local service organization. Refill the heat transfer liquid ( 6.2). -
Page 32: Unlock The Overtemperature Protection
7.11.4 Unlock the overtemperature protection Switch off the thermostat, pull out the mains plug! To unlock the protection, push the reset knob behind the ventila- tion grille (see arrows). You can use for example a pen. Switch on the thermostat. 7.11.5 Pump-motor supervision: Overload ... -
Page 33: Fault List "Alarms And Errors
pull out the mains plug! Have the unit checked by the LAUDA Service or the local service organisation! The heater surface can reach temperatures up to 250 °C when there is not enough liquid in the bath Danger of burning injuries. Use only non-flammable liquids, otherwise Danger of... -
Page 34: Maintenance
Maintenance Cleaning Before cleaning the unit, pull out the mains plug! The unit can be cleaned with water adding a few drops of detergent (washing up liquid), using a moist cloth. Water/ heat transfer liquid must not enter the control unit! ... -
Page 35: Testing The Heat Transfer Liquid
Note on repair If you need to send in a unit for repair, it is essential to first contact the LAUDA Service ( 8.5). If the equipment has to be returned to the factory, please ensure that it is packed carefully and properly. -
Page 36: Ordering Spares And Rating Label
When ordering spares please quote instrument type and serial number from the rating label. This avoids queries and sup- ply of incorrect items. Rating label at immersion/heating thermostats Contact LAUDA Service Constant Temperature Equipment in the following cases: In the event of faults on the machine For spare part orders ... -
Page 37: Accessories
A 12 Rack for 12 tubes, 180 mm x 60 mm x one rack fits in each of RA 12 UE 038 d = 20 mm 80 mm, six racks fit in each of A 24 and RA 24 -40 –... - Page 38 PP yellow, Rack for 90 tubes, 250 mm x 100 mm two racks fit in each of RA 12 UE 043 d = 13 mm x 65 mm, three racks fit in each of A 24 and RA 24 0 – 135 °C...
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Page 39: Technical Data And Diagrams
Technical data and diagrams The figures have been determined according to DIN 12876. Common technical data of Alpha Thermostats Ambient temperature range °C 5 – 40 Humidity Maximum relative humidity 80 % for temperatures up to 31 °C, decreasing linearly to 50 % relative humidity at 40 °C Storage temperature range °C -50 –... - Page 40 Alpha Immersion Thermostat Working temperature range °C 25 – 100 Operating temperature range °C -25 – 100 Pump flow L/min Pump pressure Bath volume up to 50 Connections for cooling coil (accessory) Hose nozzle 11.7 mm external diameter Overall dimensions (W x D x H) 125 x 150 x 300 Weight Ingress protection rating...
- Page 41 Alpha Heating and Cooling Thermostats Units A 12 A 24 RA 8 RA 12 RA 24 Working temperature range °C 25 – 100 -25 – 100 Operating temperature range °C -25 – 100 -25 – 100 Cooling capacity (eff.), 20 °C ethanol @ 20 °C am-...
- Page 42 Power consumption Power supply Units A 12 A 24 RA 8 RA 12 RA 24 230 V~ ±10 %; 50/60 Hz 230 V~ ±10 %; 50 Hz 220 V~ ±10 %; 60 Hz 115 V~ ±10 %; 60 Hz 100 V~ ±10 %; 50/60 Hz Refrigerant and filling quantity The cooling thermostat contains fluorinated greenhouse gases.
- Page 43 Pump characteristics Alpha Immersion Thermostat measured with water Heating up curves from Alpha A 6, A 12 and A 24 (230 V~) (@ 230 V~) 7/2022 Alpha 43 / 52...
- Page 44 Cooling characteristics Alpha RA 8, RA 12 and RA 24 (230 V~) (@ 230 V~) 44 / 52 Alpha 7/2022...
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Page 45: Declaration Of Conformity And Product Returns
Declaration of Conformity and Product Returns 7/2022 Alpha 45 / 52... - Page 46 46 / 52 Alpha 7/2022...
- Page 47 7/2022 Alpha 47 / 52...
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Page 48: Copyright
Copyright This manual is protected by copyright and only meant for internal use by purchasers. The relinquishment of this manual to third parties, copying in any way whatsoever – even in the form of excerpts – and the utilization and/or conveyance of its content are not allowed, except for internal purposes, without written approval from the manufacturer. -
Page 49: Index
Index Hi ..................28 Accessories ................ 37 Standard accessories ............. 17 Key functions ..............26 Alarms ................. 30 ASd ..................27 Automatic Shutdown Timer ..........27 LED signals ................. 26 Lo ..................28 Low level protection ............31 Baths ................... 15 Low level Protection testing .......... - Page 50 Standby ................30 minimum temperature ..........28 StbY .................. 30 UK plugs ................25 Temperature Limit temperature ............28 maximum temperature ..........28 Warnings ................30 50 / 52 Alpha 7/2022...
- Page 52 LAUDA DR. R. WOBSER GMBH & CO. KG ◦ Laudaplatz 1 ◦ 97922 Lauda-Königshofen Telephone: +49 (0)9343 503-0 ◦ Fax: +49 (0)9343 503-222 E-mail: info@lauda.de ◦ Internet: https://www.lauda.de...
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