Ronghua HJ-2A digital display double-head magnetic stirrer specific operation process:
Instructions
When using this magnetic stirrer, please first check whether the random accessories are complete, then install the fixture in order, put the beaker to be stirred in the middle of the chrome plate, add the solution, put the stirring bar in the beaker solution, and then plug in the instrument first Plug in the power plug and temperature control probe, then turn on the power and turn on the power switch.
Press the SET key to enter the temperature setting mode to set or view the set value. Press the SET key to see the number flashing to indicate that in the setting mode, press the up button to increase the set value, and the down button to decrease the set value. Increase or decrease to the value you need, after setting, press the SET button to exit the setting mode and return to the normal working measurement mode.
2. Adjust parameter Sc: Press and hold the SET key for 3 seconds to enter the internal parameter setting adjustment interface. The interface displays Sc as the error calibration value, indicating the error between the measured value and the actual value of the temperature controller. The default is 0.0, and you can adjust it again Press the SET key, the flashing number will enter the adjustment state (the following parameters are set in the same way), press the up or down button to adjust the value. (-9.9~9.0)
E: After setting, press the SET key to enter the next parameter adjustment. The interface displays E to indicate the advance of the breakpoint control (only effective when the P value is set to 0), the default value is 0.5, and the adjustment method is the same as Sc.
P: Press the SET key again to enter the third parameter, and the interface displays P to indicate the P value setting. The meaning of P value is roughly the start control temperature = set value - (10/P value). For example, if it is set to 50 degrees, when the P value is 10, it means that the control starts at 49 degrees, and when the P value is 4, it means that the adjustment starts at 47.5 degrees. If the temperature overshoot is too large during use, adjust the P value appropriately; if the temperature rises too slowly or never reaches the control temperature, adjust the P value appropriately.
Note: When the P value is 0, enter the breakpoint control mode. That is, the system PID is invalid, when the temperature is lower than (set value - E value), it starts heating, otherwise it stops heating.
c: Press the SET button again to enter the setting of the last parameter c, the last parameter is temporarily reserved for the system, please do not adjust, the default value is 20.0. After setting all the parameters, press the SET button to return to the normal working state.
Precautions
1. If you find that the stirring is beating or not stirring during stirring, please cut off the power and check whether the bottom of the beaker is flat and the position is correct. At the same time, please test whether the current voltage is between 220V±10V, otherwise the above situation will occur.
2. Generally, the heating time should not be too long. Intermittent use can prolong the service life.
3. Be sure to use the ground wire for safe use.
