HJ-3 Constant Temperature Magnetic StirrerThe high sensitivity of constant temperature has taken the automation of chemical experiment stirring a step forward, and it is also an ideal tool for matching various analyzer and stirrer solutions.

HJ-3 Constant Temperature Magnetic StirrerTechnical Parameter

Usage and maintenance:
1. Place the test bottle (or other vessel) containing the solution stirrer on the top plate of the working face.
2. Connect the external power supply and turn on the power switch.
3. Insert the temperature sensor into the solution and set the temperature: Press the SET button to set or view the temperature set point. Press the SET key and the digital display character will start flashing, indicating that the instrument has entered the set state. Press the △ key to increase the set value, and press the ▽ key to decrease the set value. Long press the △ key or ▽ key to quickly change the data. When the desired temperature is reached, press the SET key again to return the instrument to normal working state. The temperature setting is complete.
The following parameters have already been debugged at the factory and will be adjusted if they cannot meet the requirements
Press the SET button for 3 seconds to enter the inner layer parameter setting state of the instrument.

E: This parameter is the advance amount for stopping heating when P=0. When P is not equal to 0, the instrument operates in intelligent PID mode, and when P is not equal to 0, the E parameter is meaningless.
P: For the proportional band, which refers to the proportional control value, the instrument operates in PID mode with the set value as the center and the P value distributed on both sides of the set point within the P value range.
T: For the heating output cycle, which is the working cycle of the relay, a small T value has good control effect, but a too small T value will reduce the lifespan of the relay due to frequent operation. Generally, the T value is taken as 20-60 seconds.
To simplify the operation, the integration and differentiation time of the instrument are designed as hidden parameters, with their values set as automatic default values.

4. Error correction: When confirming that the value displayed on the instrument is not the correct measurement value, the displayed value can be corrected. Press the SET key for 3 seconds to enter the inner menu of the instrument panel. The * parameters that appear and flash are E00, which is the advance quantity. Press the SET key again to display and flash the parameters, which are the error correction parameters. Use the △ or ▽ keys to modify this parameter. The range of error correction is -9.9 ℃ to+9.9 ℃. After the correction is completed, press the SET button again to exit. The correction value of the instrument is 0.0 when it leaves the factory. When using it, it is necessary to prevent correcting the instrument that displays correctly to be incorrect.
5. Adjust the speed control knob to the desired speed.
6. After completing the work, place the speed control knob in the minimum position, set the temperature control switch to the minimum value, turn off the power switch, and cut off the power.
7. Wipe the work surface clean.