HWY-10 the low-temperature water bath

一、Scope of application

The low-temperature water bath is a new generation of maintenance equipment designed and developed according to JTG E20-2011 “Highway Engineering Asphalt and Asphalt Mixture Test Regulations”. It can provide sample constant temperature maintenance for the three major index tests of asphalt, and it is also suitable for various temperature control needs. Range of instruments used under normal temperature conditions. The machine is equipped with high-quality compressors and high-precision instruments for temperature control. It has the advantages of fast cooling speed, low noise, and high temperature accuracy. It is a piece of indispensable equipment for testing and testing units.

二、Technical index

1、Power supply： AC 220V（-5%～ 10%），50Hz。

2、Water bath capacity：long310×width180×height200（mm）

3、Applicable water：10L。

4、heating power： 1000W。

5、Refrigerator： 500W

6、Temperature control range： 5℃～60℃。

7、Temperature control accuracy： ±0.1℃。

8、Ambient temperature： ≤30℃。

9、Relative humidity： ≤85%。

10、Whole machine power consumption： no greater than 2000W。

11、Dimensions：570×380×320mm

12、Net weight of instrument：20kg

三、Instructions

1. When using for the first time, remove the top cover and add water or antifreeze until it is 3cm away from the top opening。

2. Connect the external experimental equipment that needs to be cooled and connect the water inlet of the external experimental equipment that needs to be cooled with the water outlet of the low-temperature thermostat tank, and then connect the water outlet of the external experimental equipment that needs to be cooled with the water inlet of the low-temperature thermostat. It’s best to use insulated hoses for the water pipes, which is a closed circulation system。

3. If it is only used to cool the sample, you can put the sample directly into the water tank, just connect the outlet and inlet of the high and low-temperature water bath. The upper port is the circulating fluid outlet, and the lower port is the circulating fluid inlet and the water drain。

4. When the coolant in the tank is combustible or explosive, it is strictly prohibited to turn on the heating.

5. When the temperature is below 35℃, if the temperature control requirement is not high, just turn on the refrigeration switch and turn off the heating switch, and set the parameter cooling hysteresis DN to -0.2℃ and UP to 0.2℃ to control the temperature by starting and stopping the compressor. If the temperature control requirements are high, turn on the cooling and heating switches at the same time and set the parameter cooling hysteresis DN to -10℃. The compressor will continue to work through heating compensation to achieve precise temperature control. Generally, this is used when the temperature fluctuation is 0.2℃. method.

6. When controlling above 35℃, just turn on the heating switch and turn off the cooling switch.

四、Precautions

1. The power cord is reliably grounded。

2. The power should be completely disconnected before opening the case for maintenance.

3. Do not perform heating work before adding liquid to prevent the heating tube from burning out.

4. During use, avoid debris from entering the working room to avoid blocking the circulating pump and causing the inability to circulate, resulting in poor cooling effect or no cooling.

5. Do not start the circulating pump when the liquid container has no circulating refrigerating liquid or the refrigerating liquid level is too low。

6. There should be enough space around the instrument when in use. There should be no obstacles and blockages in the blind holes on both sides。

7. It is strictly forbidden to turn on the refrigeration compressor when the set temperature is above 40℃.

8. When the liquid in the tank is a flammable liquid, it is strictly prohibited to turn on the heating.

9. The tilt should not exceed 45 degrees during handling and cleaning.

10. After use, place in a ventilated, dry, and pollution-free environment.