lbx instruments H20SQC LED Digital Magnetic Stirrer with Heating Glass Ceramic User Manual

lbx instruments H20SQC LED Digital Magnetic Stirrer with Heating Glass Ceramic User Manual

Safety Instructions

Warning!

• Read the operating instructions carefully before use.
• Make sure only trained staff works with the equipment.

Risk of burns!

• Caution when touching parts of the chassis and the hotplate, which can reach temperatures of 550°C.
• Pay attention to the residual heat after switching off the equipment.

Protective ground contact!

• Make sure that the socket is earthed (with protective ground contact) before use
• When working wear personal protective equipment to avoid risks from:
  • Splashing and evaporation of liquids
  • Release of toxic or combustible gases
• Set up the instrument on a spacious, stable, clean, non-slip, dry, and fireproof surface. Do not operate the equipment in explosive atmospheres, with hazardous substances or underwater.
• Increase the speed gradually. Reduce the speed if:
  • Stirring bar breaks due to high speed
  • The equipment is not running smoothly or the container moves on the base plate.
• Temperature must always be set at least 50 ºC below the combustion point of the media used.
• Beware of hazards due to:
  • Flammable materials or media with a low boiling temperature
  • Overfilling of the container
  • Unsafe container
• Process pathogenic materials only in closed vessels.
• If the stirrer bar contains PTFE, please note:
  • Elemental fluorine, three fluoride and alkali metals will corrode the PTFE and Halogen alkanes expand at  room temperature.
  • Molten alkali, alkaline earth metals or their solution, as well as the powder in second and third ethnic of the Periodic Table of Elements will react with PTFE if the temperature reaches 300 ~ 400 ºC .
• Check the instrument and the accessories for damage prior to every use. Do not use damaged components. A safe operation is only guaranteed with the accessories described in the “Accessories” chapter. Accessories must be securely attached to the device and cannot come off by themselves. Always disconnect the plug before the assembly or disassembly of accessories.
• When the external temperature sensor is needed, the tip of the measuring sensor must be at least5-10 mm away from the vessel bottom and wall.
• The equipment can only be disconnected from the main power supply by pulling out the mains plug.
• The voltage stated on the label must correspond to the main power supply.
• Make sure that the main power supply cable does not touch the hotplate. Do not cover the device.
• Do not exert pressure on the ceramic glass surface or expose it to overheated media; it may cause the surface to break.
• The instrument may only be opened by expert authorized electronic technicians.
• Keep away from high magnetic fields.
• Observe the minimum distances between devices, between the device and the wall, and above the assembly (min. 100 mm.)
  

Proper Use

The instrument is designed for mixing and/or heating liquids in schools, laboratories, or factories. This device is not suitable for use in residential areas or other restrictions mentioned in Chapter 1.

Inspection

Unpacking

Unpack the equipment carefully and check for any damages which may have arisen during transportation. Please contact the manufacturer/supplier for technical support.

Note:
If there is any apparent damage to the system, please do not plug it into the power line.

Listing of Items

The package includes the following items:

Control

Control elements

this knob. To increase the value, turn the knob clockwise. To stop the function, turn the knob all the way counterclockwise.
Temperature controlknob Heat| The heating function and the temperature are adjusted with this knob. To increase the value, turn the knob clockwise. To stop the function, turn the knob all the way counterclockwise.
LED screen| LED screen displays the settings and the real temperature.
Heat LED| When the heating function is activated, the Heat LED lights up until the set temperature isreached. If the temperature drops or is changed, the LED lights up again until the set temperature is reached.
Stir| When the instrument is ON, the Stir LED
LED| lights up.
Power Switch| Switch the instrument ON/OFF

Display

screen displays the temperature setting value for 5 seconds and then shifts to the real value.

Once the heating function is switched OFF but the hotplate temperature is still above 50ºC, the LED screen displays “Hot”; otherwise, the LED screen displays “0”.

Trial Run

• Make sure the required operating voltage and power supply voltage match.
• Ensure the socket is properly earthed.
• Plug in the power cable, ensure the power is on.
• Add the medium into the vessel with an appropriate magnetic stirring bar.
• Place the vessel on the work plate.
• Stirring: Set the stirring speed and begin (see Chapter 7: Stirring Function).
• Observe the magnetic stirring bat as it moves.
• Heating: Set the target temperature and start heating.
• Observe the real temperature value on the LED screen.
• Stop the heating and stirring functions.
• Power OFF the equipment by pressing the ON/OFF switch.

If the operations above cause no abnormalities, the device is ready to operate. Otherwise, the device may have been damaged during transportation; please contact manufacturer/supplier for technical support.

Warning!
Forbidden to transfer/manipulate the vessel while the instrument is working.

Function: Heating

The device is controlled by digital temperature control technology, which has two separate safe circuits.

• If an external sensor PT1000 is used, always connect it to the device BEFORE turning the power on and submerge it into the sample BEFORE starting to heat (see section 6.1).
• Turn the unit on by pressing the ON/OFF switch.
• Select the target temperature by slowly turning the temperature knob towards the desired value.
• When the heating function is ON, the LED screen displays the target temperature value for 5 seconds and then shifts to the real value. The Heat LED also lights up until the set temperature is reached.
• At the end of the operation, turn off the heating function by turning the temperature knob all the way to the left.
• Turn off the unit by pressing the ON/OFF switch.

The heating function will be stopped automatically under abnormal conditions. The device has a fixed safety temperature of 580ºC; therefore, it automatically stops heating once that temperature is reached.

• If working with an external temperature sensor, make sure it is inserted into the media to be heated.
• Switch ON the instrument and run the heating function.

If the heating function is still not working, please contact the manufacturer/supplier for technical support.

Generally, the LED display does not indicate the actual temperature of the sample in the vessel or on the hotplate surface.

There are temperatures differences between the following:

• Hotplate center and outer edge.
• The sample in the container and the hotplate.

In order to ensure an accurate measurement of the temperature inside the container, use the external temperature sensor PT1000.

Working with an external temperature sensor

The external temperature sensor PT1000 is a standard accessory of the manufacturer. Compared to the hotplate’s temperature control, the external temperature sensor can control the medium’s temperature with a higher accuracy.

• If the external temperature sensor is needed, it must be plugged into the device BEFORE turning ON the device.
• Ensure the external temperature sensor is firmly connected and inserted into the media before heating.
• Switch ON the equipment and start heating.
• The LED screen displays the set target temperature for 5 seconds and then shifts to the real temperature.

Warning!
Forbidden to plug in/pull out the external temperature sensor while the equipment is ON

Residual heat warning (HOT)

In order to prevent the risk of burns from the hotplate, the digital hotplate has a residual heat warning function.
While the heating function is switched OFF but the heating plate temperature is still above 50ºC,
“Hot” will flash on the LED screen to warn that there is a hazard of burns from the hotplate. When the hotplate temperature drops to below 50ºC, the LED screen displays “0”.
If users want to turn OFF the LED display immediately (the warning message keeps popping up), just pull out the plug directly. Once unplugged, the residual heat message stops flashing.

Function: Stirring

The stirring function is turned ON/OFF by turning the speed control knob. The speed is adjusted with the knob (from 100 to 1500 rpm in 10 rpm intervals). When the heating and stirring functions are switched ON at the same time, the LED screen displays the set temperature value for 5 seconds first and then shifts to the real temperature value.

• Turn the unit ON by pressing the ON/OFF switch.
• Adjust the stirring speed by slowly turning the speed control towards the desired value.
• When the stirring function is ON, the Stir LED lights up during the entire operation.
• At the end of the operation, turn OFF the stirring function by turning the speed control all theway to the left.
• Turn the unit OFF by pressing the ON/OFF switch.

Faults

• Instruments cannot be turned ON.
  • Check whether the power cable is plugged in.
  • Check whether the fuse is broken or loose.
• Stir speed cannot reach the set point.
  • Excessive medium viscosity may cause abnormal motor speed reduction.
• Unit cannot be powered OFF when pressing the ON/OFF switch.
  • Check if the residual heat warning function is still ON and the hotplate temperature is above 50ºC (the LED screen still works and “Hot” flashes on the LED screen).

If these faults are not resolved, please contact the manufacturer/supplier.

Maintenance and Cleaning

• Proper maintenance can keep instruments working properly and lengthen their lifetime.
• Do not spray cleanser onto the instrument when cleaning.
• Unplug the power line when cleaning.
• Only use recommended cleansers:

• Before using another cleaning or decontamination method, the user must verify with the manufacturer that this method will not harm the instrument.
• Wear proper protective gloves while cleaning the instrument.
• If maintenance service is needed, the equipment must be cleaned and shipped in its original packaging in order to avoid pollution from hazardous substances.
• The ceramic coating makes the hotplate more resistant to acids and bases and easier to maintain. However, it is equally vulnerable to extreme temperature fluctuations and impact forces (risk of cracking and/or detaching of the coating).

Note:

• Electronic devices cannot be cleaned with cleanser.
• If maintenance service is needed, the equipment must be cleaned and packed into the original carton before shipping in order to avoid pollution from hazardous substances.
• If the instrument will not be used for a long time, please power OFF and place in a dry, clean, and stable location at room temperature

Associated Standards and Regulations

Construction in accordance with the following safety standards:

• EN 61010-1
• UL 3101-1
• CAN/CSA C22.2(1010-1)
• EN 61010-2-10

Construction in accordance with the following EMC standards:

• EN 61326-1

Associated EU guidelines:

• EMC-guidelines: 2004/108/CE
• Instrument guidelines: 73/023/EWG

Technical data

Accessories

Please contact our company to order the following accessories available for these devices: magnetic stirring bars, PT1000 temperature sensor with glass coated and support clamp for temperature sensor.

http://www.labbox.com/

References

• Lab supplies - Labbox Export

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