Operation Manual Digital Heating Hotplate HP-1D

Transcription

1 Operation Manual Digital Heating Hotplate HP-1D Before you operate the hot plate with external temperature probe, make sure that the external probe will be constantly soaked in your sample and not in the air, to avoid serious damage to the plate

2 IMPORTANT SAFETY INSTRUCTIONS: WARNING 1. Do not heat any substances above temperature which will cause hazards of explosion, implosion or release of toxic or flammable gases from the material being heated 2. Do not use in the presence of flammable or combustible materials, or explosive gases 3. Do not use in the presence of pressurized or sealed containers. Fire or explosion may result causing injury or death 4. Do not operate the hot plate on EXTERNAL mode, while the external sensor is "on air ", always make sure that the sensor is immersed inside the liquid. 5. To avoid electric shock, always use a property grounded electrical outlet of correct voltage, and correct handling capacity equipment 6. The user shall be aware that, if the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. 7. The instrument should be placed so, that handy operation of the ON- OFF Switch is possible. Service only by a qualified Service engineer. 8. Always disconnect from power supply prior to maintenance and servicing. 9. The instrument may be hot to touch, even when the pilot light is off 10. Connect the instrument to a ground mains outlet, after ensuring that the Voltage is the same as given on the name plate 11. The Instrument must be connected to an earthen (grounded) supply. Cleaning: To keep the plate clean you can use aluminum paper you can cover the hot plate only but not the cooling plates under it. No use of caustic soda in cleaning reagent Please read the following carefully before use: Do not use this product in a manner other than as stated in the Operating Conditions section of this manual as the protection provided by the equipment may be impaired. The plate temperature might remain dangerously high even after the heater was turned off. Don t touch the plate and/or place any objects on top of it that are not meant to be heated. This product is designed for use in laboratory environments by persons knowledgeable in safe laboratory practices. Always wear safety glasses and other appropriate protective equipment when operating this product.

3 The plate might be covered with aluminum foil to protect it, DO NOT cover any other part of the device and make sure that the radiation sheets underneath are untouched. The Aluminum topped plates are not designed to be used with metal containers. For heating of such containers it s advisable to use a ceramic top hot plate. Connect only to grounded power source, make sure the voltage and frequency of your electrical outlet fits the requirements labeled on the device. Do not use in areas with explosive atmosphere, flammable/combustible liquids etc. Do not overweight the plate. Before cleaning the device, make sure to disconnect it from the power source. Do not immerse the product in any liquid. Position the product for use so that the power cord can be easily disconnected without having to move the product. Heating Operation Principles The heating element and a temperature sensor are located just beneath the top surface of the product. The microprocessor is responsible for regulating the heating produced by the heating element right beneath the plate surface. The microprocessor work is based upon the sensor temperature and the value set on the Heating Temperature Display. When the sensor temperature is not within range of the value set on the display, the display will FLASH. When the sensor temperature is within range, the value displayed will remain constantly ON. The Heating Temperature Display does not indicate the actual temperature of materials placed on top of the product or the actual temperature of the top surface.

4 General view

5 Components description: Temperature Digital Controller Control the temperature ON/OFF switch turn on the plate with this switch Heating indicator when the heating is activated this LED light on or blinking Main power cord for outlet connection External K sensor While working in an external mode connect the K sensor to this socket (the external sensor is optional) Base for stand/pole (optional) 2132 Digital controller To insert your temperature set point press on the "raise" or the "lower" button Remark: Don t change any other parameters in the 2132 controller except from your temperature set point or AUTO TUNE procedure

6 Operation instruction: Working with the built-in Internal sensor Verify that the back plug of the K sensor is connected well to the back K socket with the correct polarity Turn on the main switch Insert your temperature set point in the controller with the arrows Wait for temperature stabilization Working with External sensor (optional) Connect the external sensor to the back socket instead of the built-in one (verify the correct polarity) Put glassware with liquid on the plate surface Put the external sensor in the glassware Turn on the main switch Insert your temperature set point in the controller with the arrows Wait for temperature stabilization

7 Appendix 2132 AUTO TUNE procedure: Explanation: Temperature control using digital PID controllers have automatic auto-tune functions. During the auto-tune period the PID controller controls the power to the process and measures the rate of change, overshoot and response time of the plant. This is often based on the Zeigler-Nichols method of calculating controller term values. Once the auto-tune period is completed the P, I &D values are stored and used by the PID controller. Use AT function to automatically calculate and set the optimize PID value for your system Procedure: If you have an overshooting do as follows: Enter your temperature set point on the 2132 controller Press several times on the "PAGE" button until "Atun" Press on the" Scroll" button one time until "tune" Change "OFF" to "ON" with the "RAISE" arrow & wait 2 second Press several times on the "PAGE" button to exit to the main Manu From this point the "tune" will blinking on the screen Don t touch the controller and wait until the procedure to be finished (This procedure should be taken a certain time please wait)