I. Brief introduction of multi-functional high and low temperature circulating water bath products
this product is suitable for maintenance of all kinds of specimens in engineering tests, and the temperature control range is used under normal temperature conditions. It has the advantages of fast cooling speed, low noise and high precision of constant temperature. Wide USE, with TD604 series needle penetration link can do all kinds of temperature test. with TD503 Lee's specific gravity bottle can do cement density test, in addition, the product can also curing needle penetration test, Marshall stability test and other specimens. It can basically complete most of the specimens in the laboratory, and is an indispensable equipment for testing and testing units.
Two, multi-functional high and low temperature circulating water bath technical parameters
1. Temperature control table temperature control range: 0~99.9℃
2. Power supply voltage: 220V
3. Temperature control accuracy: ±0.1℃
4. Water bath size: 460*280*240
5. Heating power: 1000W
6. Refrigeration power: 280W
7. Temperature control range: 3-60℃
8. Machine weight: 82KG
3. Installation and debugging of multi-functional high and low temperature circulating water bath
1. the equipment should be placed at room temperature -10℃- 30℃; Relative humidity should not be higher than 80% indoor, indoor good ventilation.
2. Do not knock the box and components when unpacking.
3. It is recommended to use an air switch with leakage protection for the power supply of the device, so the device is not equipped with a power plug before delivery.
4. the device shall be placed on the flat ground, and the four feet at the bottom of the device shall all touch the ground and exert even force.
5. after the power is switched on, add water to the water tank to debug the device. the water level can not be lower than the grate in the sink (note: remember to start without adding water)
6. after the device is filled with water, check whether any parts of the device are leaking. If there is water leakage, please tighten the bolt of the component or notify the company.
7. Power on, press the power button, cooling button, and water pump button in sequence. At this time the pump stirring device starts. however, the compressor will not start. (Note: the compressor has been set with a delay protection device before delivery. It usually takes 3-5 minutes to start.)
8. Test temperature: 25℃, 15℃, 5℃, starting from 25℃, when the temperature control meter shows that the temperature reaches 25℃, the heating system will run automatically. the refrigeration system will always operate, and the heating system will compensate for the heat loss caused by the refrigeration system. (the reason why the technology department of our company designed the circuit in this way is: Firstly, in order to control the temperature more accurately, secondly, in order to protect the compressor and extend the service life of the compressor) at this time, the temperature of the water in the water bath will continue to drop about 3-5℃ lower than the setting temperature, and then gradually rise until it reaches the set temperature control temperature and constant temperature. 15 and 5 test process in turn and so on.
9. after the completion of the test run, the water in the water area should be released, and all parts should be wiped clean for later use.
Four, multifunctional high and low temperature circulating water bath matters needing attention
1. this product has good grounding when it is used.
2. the distance between the back cover of the water bath and the wall should not be less than 50cm.
3. Drinking water with few minerals should be added to the water tank to avoid scale formation in the water tank and circulating pipe fittings.
4. the voltage should be strictly controlled at 220V±20V.
5. Do not switch on or off the compressor during use. Turn off the water pump, refrigeration, and power switches after use.
6. Discharge the water in the water bath after use, and wipe all parts clean for later use.
7. Compressor is easy to break down when it is not in use for a long time, so this equipment should be tested once a month to prevent compressor damage.
8. When the temperature control system is close to the set temperature control range, there is a process of calculating the heating frequency and heating time. during this process, it is forbidden to control the compressor switch by hand.
9. If the device is not used for a long time, it should not be started up and run once more than 2 months.

Product Features:
Independent controller, suitable for temperature control and measurement inside and outside the tank
the controller temperature is adjustable, and the cooling/heating range is optional
Five convenient independent buttons provide accurate and convenient Settings
Large, highlighted display, accurate reading even from a distance
Visual alarm clock to remind the user when the operation is completed
User calibration function facilitates maximum accuracy at the desired operating temperature
Multilevel safety protection, prevent overheating and drying, to ensure the safety of samples and workplace
Fully enclosed magnetic pump circulation stirring system to maintain accurate temperature and uniformity
Large opening slot and external circulation device can easily realize the dual use of one machine and save costs
the bottom drainage function makes it easier to use
Stability ±0.1℃
Note: If the refrigeration unit is not needed, it can be closed separately. the maximum operating temperature of the refrigeration unit is 96℃.

V. Description of after-sales service
Thank you for your trust in our company and welcome to buy our products! in order to enable you to better use this product, our company makes the following maintenance service commitment to you through the warranty card attached to this product, and we will provide you with maintenance services in strict accordance with the requirements of the service commitment.
1. Scope of application of after-sales service terms
1.1 these after-sales service terms are applicable to customers who purchase and use our products in mainland China. for direct customers who buy and use our products in countries and regions outside Mainland China, as well as Hong Kong, Macao and Taiwan, if the products are not directly purchased from our company, please contact and negotiate with our distributors about after-sales services.
1.2 distributors or integrators to buy for my company product in mainland China or countries and regions outside China mainland, and Hong Kong, Macao and Taiwan sales, its related after-sales service and technical support shall be the responsibility of the distributors or integrators, our company will fully training of distributors or integrators, and to provide appropriate technical support, so that dealers or integrators can give customers enough after-sales service. during the warranty period, if our products meet the quality problems in accordance with the warranty terms, our company is only responsible for returning to our company for repair or replacement, and the resulting transportation, storage and other related costs shall be borne by the distributor or integrator.
2. Start date of after-sales service
2.1 the starting time of after-sales service shall be the date of filing for after-sales service.
2.2 the starting time of products without after-sales service record shall be the date of purchase.
2.3 Products without after-sales service records or invoices. the production date marked on the product nameplate and the production record recorded by our company shall be taken as the start time of after-sales service.
3. Terms of after-sales service
3.1 If the fault occurs within 7 days from the start of after-sales service, if the fault can not be solved on site and belongs to the quality problem of the product itself, our company will be responsible for replacing the goods.
3.2 If any fault occurs within 7 days to 15 days from the start of after-sales service, the seller shall be responsible for free replacement or repair.
3.3 in case of failure after 15 days from the start of after-sales service, the purchased equipment and purchased parts will enjoy free warranty service during the effective warranty period.
3.4 Free warranty and technical service shall be enjoyed within one year from the start of after-sales service.
3.5 from the start of after-sales service, after the one-year free service period, all products produced by our company can enjoy free technical service and cost price warranty service.
4. Meet the requirements of the three guarantees
4.1 the service terms of this warranty are limited to those produced by our company. Nameplate logo, labeled correctly (in the process of after-sales service, the company's after-sales staff will ask you in detail about the logo, logo characteristics of each part).
4.2 the service terms of this warranty are limited to non-man-made damage caused by quality problems of the products under normal use.
5. Waive warranty terms
in order to protect the legitimate rights and interests of you and our company and avoid unnecessary losses, our company does not undertake the obligation of free warranty for the following terms and conditions, please choose the paid service.
5.1 the warranty certificate is incomplete, the content on the warranty certificate is inconsistent with the physical object, or the warranty certificate has been altered;
5.2 Damage caused by disassembly without our written authorization;
5.3 Product damage caused by human factors;
5.4 Product damage caused by improper transportation or handling;
5.5 Damage caused by falling, crushing, flooding or other abnormal use reasons.
5.6 Damage caused by failure to use, operate, maintain or maintain the product according to the instructions.
5.7 Damage caused by force majeure, such as flood, fire, lightning and other natural disasters, unrest, war, etc.
5.8 All products modified without the Company's formal written authorization.
5.9 Paid services shall be provided beyond the warranty period.
Note 1: for other manufacturers to use our company's branded products, we will not only do after-sales service for you, but also investigate or retain the illegal behavior of the infringement enterprise.
Remark 2: Our company reserves the right of final interpretation of the above terms of service.