MYP11-2A
Hotplate Magnetic Stirrer
Enclosed in the alumnimum-alloy casting housing, the stirrer is operated with micro-controller and rotary encoder, capable of timing and displaying speed & temperature. Two digital display windows can indicate the speed and liquor temperature simultaneously, and also show the real remaining time and temperature of the heating plate with togglekey. It achieves more stable speed, larger speed regulation ratio, stronger stirring power due to the three-phase brush-less motor, and accurate temperature control.
Main performance data
Power supply: AC220V 50Hz
Power: 620W
Max volume: 10L (H2O)
Speed: 50~1500r/min
Max stir length: 80mm
Heating plate: φ145mm
Heating power: 600W
Temperature of the heating plate: Ambient temperature~320℃
Allowable temperature of the heating plate: 350℃
Temperature tolerance of the liquor: ≤±1℃
Max timing: 250min
Size: 280 x 160 x 90mm
Weight: 2.7kg
Operating Panel
1. Digital display window: left window shows the set temperature and temperature difference parameters of the liquor in setting and stand-by modes, or displays the real temperatures of the liquor and the heating plate in operation mode. The right window shows the set speed and timing time in setting and stand-by modes, or alternatively displays real speed and remaining time in operation mode.
2. Indicators: four function indicators for speed, time, temperature, and temperature difference, warm-up indicator, working indicators for stirring and heating are arranged on both sides of display windows. Function indicators tell the meaning of figures, while working indicators specify the working or out-of-work states. For example, when the heating plate is powered on, warm-up indicator lights. The stirring indicator light telling that stirrer is running.
3. Rotary encoder and toggle key: the left encoder is to set the liquor temperature, and the nearby togglekey for the temperature difference. The right encoder is to set the speed and timing time. Press the encoder button may start or stop the stirring or heating. Turning the encoder knob clockwise may increase the figure, or decrease it by counter-clockwise.
Application
1. For use, connect terminals of the power cable and the temperature sensor to the corresponding jacks at the back, then lay the stirrer horizontal, and put the beaker onto the central position of the heating plate. Place one stir into the beaker, insert the temperature sensor into the liquor, and fasten it to the bracket if necessary. Turn on the power switch (at the lower left of the panel) to bring the stirrer into stand-by state. At this time, speed and temperature indicators light, and the left window shows the initial set temperature (or the previous set temperature), and the right one displays the initial set speed (or the previous set speed).
2. Setting: Before use, the user may set the speed and heating temperature as required. In stand-by mode, as the temperature indicator lights press the knob to confirm when the beaker temperature is set by turning the let knob. And then complete the heating setting when the temperature indicator lights.
1. Speed and timing setting: Press the right button till the indicator lights. When the time is set by turning the right knob, press the knob to confirm (0 may be set if no timing is necessary). Press the right togglekey until the speed indicator lights. When the speed is set by turning the right knob, press the knob to confirm and start stirring. The set data may keep unchanged before resetting. Turning the knob clockwise may increase the value, otherwise the value may decrease. The turning speed is closely related with the variation speed of figures. The setting value should be accurate to single figure. As a result, the knob should be turned slowly.
2. Temperature difference: the value is set depending on the highest temperature that the heating plate may achieve, which vice versa determine the speed and accuracy of the liquor warm-up.
Max temperature of the heating plate = set temperature of the liquor + temperature difference + (set temperature of the liquor - real temperature of the liquor) ×2. As the above formula shows, the temperature of the heating plate decreases with the increase of the liquor temperature. Also, the temperature difference will not work when the sample is heated about to the set temperature. In this case, automatic control works to increase the control accuracy.
The user may set the temperature based on the liquor, and the temperature difference depending on the liquor volume, contact surface between the container (beaker) and the heating plate. If the temperature difference is set too high, the sample temperature will overshoot, otherwise the warm-up speed will be too slow or even the set temperature may not be up to.
3. For operation, when all values are set, press the right knob to start stirring, and then the left knob to begin heating (only when the temperature indicator lights). Consequently, function indicators for the speed and temperature light, and operating indicators for heating and stirring are illuminated. The left display window shows the real temperature of the liquor going up, and the right one displays the stirring speed. By pressing the left togglekey till the temperature difference indicator lights, the left display window shows the temperature of the heating plate. While the right one shows the left time after pressing the right togglekey until the time indicator lights.
During operation, you may alter the speed, temperature and difference of the liquor. The set data are displayed on the window when turning the encoder and the real speed will be indicated after stopping turning for 1 second. The modified data cannot be saved.
This stirrer cannot be used as electric furnace only. The stirring procedure should be started first before heating begins. The heating process will automatically stop when the stirring ceases. It is better to increase the stirring speed when the temperature of the heating plate is set high, to facilitate the circulation of air in the stirrer and reduce overheat of the electronics.
Notes
1. Power socket should be well grounded.
2. Do not touch the heating plate to avoid injuries during stirring. The power cable and sensor lead should also be kept away from the heating plate.
3. During operating the stirrer, take some measures to prevent the liquor being spraying on the instrument and clean the instrument after use. Damages causes by corrosion are excluded from the warranty.
Accessories
One power cable; One stir (C938); One PT100 sensor
