85-2/78-1/79-1 magnetic stirrer

NegotiableUpdate on 01/08

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

85-2/78-1/79-1 magnetic stirrer uses stainless steel tray heating and temperature digital display. This instrument has good performance, no noise, no vibration, and stirring, making it an ideal tool for laboratory technicians.

Product Details

85-2/78-1/79-1 magnetic stirrer can accurately and stably stir liquid solutions over a wide speed range, especially suitable for stirring small volume samples. It is a tool for petroleum, chemical, pharmaceutical and health, environmental protection, biochemical laboratory V, analysis room, education and scientific research

1： Main technical indicators

1. Power supply: single-phase AC 50HZ 220V 2. Motor power: 25W Hot wire power: 350W

3. Stepless speed regulation: 0-2600 revolutions per minute 4. Constant temperature: room temperature -100 degrees ± 1 degree digital display

5. Mixing capacity: 2000ml

2： Usage method

When using this instrument, first check if the random accessories are complete. Then, in order, install the fixtures first, place the beaker that needs to be stirred in the center of the heating plate, add the solution, place the stirrer in the solution of the beaker, plug in the power, turn on the switch, the indicator light will turn on, set the temperature to be heated, and the instrument will start working. Gradually adjust the speed from slow to fast. High speed starting is not allowed. To avoid causing jumping.

1. Set temperature: Press the SET button to enter the temperature setting mode or view the set value. Press the SET button and see the flashing number indicating that you are in the setting mode. Press the up button to increase the set value and the down button to decrease the set value. If you keep pressing it, it will continue to increase or decrease to the value you need. After setting is complete, press the SET button to exit the setting mode and return to normal working measurement mode.

2. Adjust parameters:

Sc: Press and hold the SET button 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 value is 0.0. You can press the SET button again to display a flashing number to enter the adjustment state (the parameter setting method is the same below), and press the up or down button to adjust the value. (-9.9~9.9)。

E: After setting, press the SET key to enter the next parameter adjustment. The interface displays E, which represents the advance amount of 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 button again to enter the third parameter, and the interface will display P indicating the set value of P. The meaning of P value is roughly the starting control temperature=set value - (10/P value). If set to 50 degrees, a P value of 10 indicates control starts at 49 degrees, and a P value of 4 indicates adjustment starts at 47.5 degrees. If the temperature overshoot is too high during use, adjust the P value appropriately. If the temperature rises too slowly or cannot reach the control temperature, adjust the P value appropriately.

Note: When the P value is 0, it enters breakpoint control mode. When the system PID fails, heating starts when the temperature is below the (set value - E value), otherwise heating stops.

C: Press the SET key to enter the setting of parameter c. The parameter after 'zui' is temporarily reserved for internal system use and should not be adjusted. The default value is 10.0.

AL: Press the SET key to enter the setting of parameter AL, which represents the high temperature alarm value. When the temperature exceeds the set temperature+AL, the instrument will sound a high temperature alarm.

TI: Press the SET key to enter the setting of parameter TI, which represents the timer in minutes. 0 indicates that the timing mode is turned off. Otherwise, when the instrument operates at TI value for minutes, it will enter a stop state and stop the output of the load terminal.

After setting all parameters, press the SET button to save the parameters and return to normal working state.

85-2/78-1/79-1 Common faults and troubleshooting of magnetic stirrer

serial number	fault condition	Reasons and exclusions
1	Display normal but not heating up	The set temperature is lower than the measured temperature.
2	The heating light is on but not heating up	1. Output terminal connection failure, or heating working device failure 2. Connection failure between control board and power board
3	Always displaying 0.0	Thermistor short circuit or temperature exceeding lower limit
4	Consistently displaying 99.9	Thermistor open circuit, not connected properly, or temperature exceeding upper limit
5	Large temperature overshoot	1. The P value is too large, adjust it appropriately 2. The temperature probe is too close to the heating element
6	The heating rate is very slow	1. The P value is too small, adjust it appropriately 2. Heating device power too low or temperature probe too far away
7	Unstable temperature fluctuations	P value is too high or C value is too low
8	Slow temperature response	The C value is too high, lower it appropriately
9	Large temperature display error	Temperature probe malfunction or incorrect probe position
10	Small temperature display error	System error, adjust SC value