HH-W Series Digital Three purpose Water Tank User Manual
The HH-W series three purpose constant temperature water tank is used for distillation, drying, concentration, and temperature preservation of chemical or biological products.
One Main technical parameters
Voltage: 220V ± 10 50HZ
420 type 2-hole water tank size 420 × 180 × 150mm power 1000W 880 yuan
600 type 3-hole water tank size 600 × 280 × 150mm power 1500W 1180 yuan
2、 Structure
This product is a sink type with a large mouth diameter of 12 cm and a lid for each hole with four circles. The inner pot is made of stainless steel plate welded together, and the outer shell is made of cold thin plate and sprayed with plastic. The electric heating tube is installed in the middle of the water, which heats quickly and consumes less power. It is also equipped with a digital constant temperature regulator with an adjustment range of normal temperature to 100 ℃, and the temperature can be adjusted according to the user's needs.
3、 Usage:
A is the heating indicator, the light is on during operation, and it goes off when the temperature is constant
When setting the temperature, press and hold B to increase its value
When C is the set temperature, hold it down and the value will decrease
D is the temperature setting button
1) When using, first add water to the pot, with the water level higher than the surface of the electric heating tube. Connect the power supply, turn on the power switch, and the temperature display will light up: at this time, press "D" to see the digits flashing, and then press "B" or "C" to see the digits display to the temperature value you need. (Short press "B" and "C" to jump to the last digit, long hold "B" and "C" to quickly jump to the last digit and save your work time) Then press "D" to reset. At this point, the number displays the current temperature. Wait a few seconds for the "A" light to turn on, indicating that the heating has entered the working state. When the heating reaches the set temperature, the "A" light will turn off and enter constant temperature to stop heating. When the temperature is lower than the set value, heating will resume. Automatic repetition, no need for further operation. The instrument does not heat up when the set temperature is lower than the temperature inside the box. Attention: Due to the heating of the water in the pot, the initial temperature does not vary. If using a mercury thermometer to measure and compare, the water solution in the pot should be thoroughly stirred to make the water temperature uniform. Wait for the automatic contrast between "constant temperature" and "rising temperature" several times before proceeding.
2) Intelligent control parameter setting: Press the D key for 3 seconds to enter the inner layer parameter setting state of the instrument.
E: This parameter is the advance amount for heating stop when P=0. When P is not equal to 0, the instrument operates in intelligent PID mode. When PI is not equal to 0, parameter E is meaningless. If the set value is 50 ℃ and the advance amount is 0.5, the relay will release when the instrument controls heating at 49.5 ℃. When the temperature drops to 50 ℃ -0.5 ℃=49.5 ℃, the relay will close again. The larger the advance amount, the fewer times the relay will act. If the advance amount is too large, it will reduce the control accuracy. After adjusting the advance parameter, press the D key for 3 seconds on the instrument panel




Return to normal working condition
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 is easy to control, but a too small T value can 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 time (I) and differentiation time (D) of the instrument are designed as hidden parameters, with default values of I=180 and D=45
When not working, the power should be cut off. To ensure use, please connect the ground wire, keep the instrument clean and dry, and strictly prohibit solution from entering the machine to avoid damaging the parts and prevent severe vibration

Digital display three purpose water tank

4、 Attention:
1. This product uses 220V AC power, and the power input is a three pin plug. The grounding wire should be properly grounded to ensure safety.
2. It is not advisable to add too much water to the pot to prevent the water from overflowing when boiling. However, a low water level should not expose the heating tube to the water surface to avoid burning it out.
3. Clean the instrument thoroughly after use and cut off the power supply.

Our factory's products:
(In addition to the following products, our factory can also customize instruments according to customer needs. Consultation)
Series of incubators, series of gas bath and water bath constant temperature oscillators, series of speed regulating multi-purpose oscillators, series of magnetic stirrers, electric stirrers, series of water bath pots, sand baths, water tanks, centrifuges, series of crushers, grinders, homogenizers, series of stainless steel electric heating plates, lifting tables, constant temperature plates, series of quartz sub boiling and stainless steel distilled water dispensers, series of electric furnaces, constant temperature carriers, series of analytical instruments.