Electric constant temperature blast drying box is the most used in the laboratory of a conventional instrument, but also the laboratory is essential to the basic instruments, electric constant temperature blast drying box is widely used in biochemistry, chemical and pharmaceutical industry, medical units, industrial and mining enterprises, universities and colleges, scientific research, agriculture and other fields, for the drying of the goods, baking, melting wax, disinfection and sterilization. It is widely used in biochemical, chemical, pharmaceutical, medical units, industrial and mining enterprises, universities, scientific research, agriculture and other fields for drying, baking, waxing, sterilizing and disinfecting.
Second, the principle and structure
The drying box studio is equipped with a heat pipe, the rear is equipped with a blower device, temperature controller to control the temperature constant and high and low, the work is heated by the heat pipe and then by the blower device circulating flow, to ensure a uniform temperature, the surrounding arc design, the upper and lower spacing of the shelves can be adjusted, the built-in temperature sensing probe.
Drying box studio and shell between the glass fiber for insulation, shell made of steel, box surface by spraying treatment, the studio is made of galvanized iron or stainless steel plate (S), built-in preheating chamber and air ducts. The drying box is equipped with double-layer tempered glass door observation window. Workshop and the outer door is equipped with heat-resistant silicone rubber sealing ring, greatly increasing the sealing of the box door and the studio, and substantially improve the insulation within the box. The drying box adopts intelligent temperature control system, which is characterized by timing function, accurate temperature control and high precision.
Third, operation and use
1 , instructions for use :
The first time you use the baking machine, you need to rotate the top ventilation holes to the ventilation state, and set the temperature of 180 ℃, timed time of 60 minutes (i.e.: bake at a high temperature of 180 ℃ in the unloaded equipment for about 30 minutes), will be the inner liner and the stainless steel tray of the metal and other odors to remove.
2, set the method:
Before power on, please make sure that the switch is set in the "off" gear, open the power switch "POWER". The upper row of the display will show "InP" and the lower row will show "range value" for about 3 seconds and then enter into the normal display state.
① Setting the temperature and timing method:
A, in the normal display interface (PV shows the temperature inside the box, SV shows the set temperature), press the SET key for 1 second
B, the temperature on the display is blinking, press the [?] Move the blinking bit
C 、Press the up and down keys to increase or decrease the value of the blinking bit
D 、Press the SET key for 1 second to set the timer (the timer unit is minutes, and the temperature to the beginning of the timer)
E 、Press the key again to move the blinking bit with the value of the increase or decrease. (Do not need timing please set to 0)
F 、Press the SET key for 1 second to complete the setup.
(KH-350 and KH-450 to reach the specified temperature, SV display for timing time, from 0 to start timing)
(KH-550 and KH-750? KH-850 PV displays the temperature of the box, SV displays the set temperature, press [?] key to view the timing time, from 0 to start timing. Press [?] key to check the timing time, starting from 0.
Note: When the temperature inside the box reaches the set temperature, the timer function will start: the time will start from 0, and the alarm will be activated and the heating will stop when the time comes. Fans will always work normally, conducive to temperature uniformity.
② Setting illustration:
3, the system self-tuning
When the temperature control effect is not ideal, the system can be self-tuning. Self-adjustment process will have a large temperature overshoot, the user in the system self-adjustment before the full consideration of this factor.
In the non-setting state, long press the "self-tuning" key (GZX-35 and -45 press the AT key [left]) (GZX-55 and -75 press the up or down key) 6 seconds to enter into the system self-tuning program, "RUN/AT" indicator light flashes, self-tuning program. Indicator light flashes, after the end of self-tuning, the indicator light stops flashing, the controller will get a better set of system PID parameters, parameter values are automatically saved. During the system self-tuning process, long press the "shift/self-tuning" key for 6 seconds to abort the self-tuning program.
In the system self-tuning process, if there is an over-temperature alarm, the "ALM" alarm lamp does not light up, and the buzzer does not sound, but the heating alarm relay will be automatically disconnected. In the process of system self-tuning "set" key is invalid. In the process of system self-tuning, no matter whether there is a constant temperature time setting, the lower row of the controller display window always shows the temperature setting value.
Fourth, note
● In the use of the sample should not be placed too crowded, so as not to affect the convection inside the box, in the placement of the box, please make sure that the box is effectively grounded to ensure safety.
● When warming up, please do not splash water on the observation window of the box door, so as not to burst the glass by cold.
● volatile, flammable and explosive substances, please do not put into the box heating, in order to prevent the explosion.
● When using the top of the box as needed, please turn the exhaust hole to the open state, to facilitate the rapid drying of the goods.
V. Maintenance and Repair:
(a), the daily maintenance of the equipment:
1, the drying box should be kept clean, the box door glass should be wiped with a soft cotton cloth, do not wipe with corrosive chemical solutions to avoid chemical reactions and bruising the glass.
2, if the drying box is not used for a long time, it should be coated with neutral grease or petroleum jelly on the plating parts to prevent corrosion, and set up a good plastic film dust cover, placed in a dry room, so as not to affect the use of electrical appliances by moisture.
(ii), the daily maintenance of equipment:
When you operate in accordance with our manual, equipment failure, please press the following troubleshooting methods for initial elimination; if not, please call the company's after-sales service department, we will be happy to provide you with timely and accurate service.
(C), equipment failure phenomenon and fault analysis and solutions:
Failure phenomenon fault analysis and solutions
1, plugged in the power supply to open the power switch equipment does not respond to the power supply problem, please electrician to assist in solving.
＊ electric heaters burned out, with a multimeter "ohm" file amount of electric heaters at both ends of the resistance value, if the resistance value of 0, then the electric heating wire short-circuit, the performance of the electric gate total jump; if the resistance value of hundreds of kilo-ohms or infinity, it indicates that the electric heating wire melted that is, the open-circuit.
＊Power switch plug off.
＊Power switch is bright, you can check the control circuit board and the corresponding connection line.
2, the temperature can not rise
* Timing time to run to a fixed value of the heating tube does not work, resulting in no heating, the temperature does not go. (★ most users do not understand this function)
＊ check whether the fan is running, such as checking the bad (available multimeter to measure the fan pin two ends of the ~ 220V voltage), then notify the company to mail parts to solve.
＊Check the line control board, use a multimeter to see if there is any output.
3, the motor does not run
＊ Result: there is heating, but the liner can not be circulated, resulting in a slow rise in temperature, then notify the company to replace the processing.
4, the handle is damaged * notify the company to replace the processing
5, the control board shows the temperature and the box measured by the mercury thermometer difference * thermometer needs to be tested by the inspection department qualified measurement.
＊Mercury thermometer measurement of the installation position: please suspend the thermometer in the center of the inner cavity, can not be placed directly on the shelf measurement.
6, the temperature display appears to jump or static, or abnormal such as "- - - -" or "mouth mouth mouth" * can judge the temperature sensor problems, be replaced to solve.
Note: The sensor uses Pt100 platinum resistance, the line end of the two blue and one red.
Note: The sensor uses Pt100 platinum resistance, the line end is two blue and one red.