Temperature and humidity verification box

Model：WSJ - 2A, WSJ - 2B, WSJ - 2C

1 meet the standard:

Jjg205-2005 mechanical hygrometer calibration procedure

Check point: temperature = 20 ℃;The humidity is 40% RH, 60% RH and 80% RH respectively

2 main technical indicators:

Scope of work: 2.1 temperature + 5 ℃ ~ + 50 ℃

2.2 humidity work range: 30% RH ~ 90% RH;

Temperature fluctuation: 2.3 + / - 0.1 ℃

Temperature uniformity: 2.4 to 0.3 ℃

2.5 humidity fluctuation: RH

2.6 humidity uniformity: 1.0% RH

2.7 sensor: a high - precision platinum resistance dry wet - ball

2.8 display resolution: temperature 2.8 ℃;Humidity 0.1% RH

2.9 temperature and humidity control instruments: automatic control

2.10 display mode: simplified Chinese liquid crystal display;Direct display of temperature and humidity

2.11 studio size: deep (D) x width (W) x height (H) = 600mm x 600mm x 600mm

2.12 studio volume: 216L

Refrigerating plant: totally enclosed environmental friendly compressor

2.14 refrigerant: environmental protection refrigerant

2.15 refrigeration accessories: solenoid valve;Pressure controller;All the filters are imported

2.16 operation mode: constant

2.17 protection measures: overtemperature protection;Overpressure protection;Overload protection;Compressor temperature protection;Compressor time protection

2.18 power supply: 220V / 50Hz.

2.19 maximum power: about 3.8 KW.

 

3 structure:

3.1 shell is cold rolled steel plate, surface treatment is electrostatic spraying

3.2 tank material: SUS304 stainless steel plate

Insulation: polyester foam

 

4 working principle:

4.1 the air force flow under the action of the fan in the cabinet, air through the shallow water dish was humidifier humidification, humidifier humidification power controlled by temperature and humidity control instrument, when the work below want the humidity of the indoor humidity, temperature and humidity control instrument control humidifier humidification, make work indoor humidity to want.Air to flow through a unit of work is a dehumidifier, dehumidifier for a group of copper tube, it is under the action of the compressor, the surface temperature is reduced, the moisture in the air because of the low temperature and condensation, this reduces the moisture in the air, reduce the temperature of the air, thus humidifier to set aside the humidification of space.

As the air continues to flow through the cooling evaporator, the heat in the air is carried away by the refrigeration evaporator, lowering the temperature in the air.Continue to flow, to flow through the last unit of work is heater, heater in control of temperature and humidity control instrument, which can adjust the balance, make work indoor temperature to want.

4.2 air fully mixed by fan, then was blown into the studio, and uniform flow in the studio, and then by reflux passage at the bottom of the circulation flow, which makes the air full circulation in the workshop, to ensure the uniformity of the device temperature and humidity indicator.

4.3 temperature and humidity adjustment operation mode: PID

4.4 output mode: pulse width modulation (PWM)

4.5 cooling mode: mechanical refrigeration

4.6 cooling mode: air cooling

4.7 dehumidification: cooling light pipe + shallow water plate

4.8 thermostat: heating balance

4.9 humidification mode: humidification balance

4.10 cooling compressor start: intelligent mode

4.11 dehumidification compressor starts: independent dehumidification system operation

4.12 powerful dehumidifying solenoid valve startup: intelligent mode

4.13 lighting control: manual + automatic switch

    

Sealing insulation performance

5.1 the equipment is in line with the national electrical safety standards and wiring specifications, and the terminals of each terminal are clearly marked and not exposed directly.

5.2 the polyester foaming material is filled between the studio and the shell, which guarantees the insulation performance of the equipment.

5.3 the quality level of all electrical components of the equipment is not lower than the industrial standard;Various valve bodies, pipeline switches and pipeline fittings and accessories are brand name products.

5.4 the equipment is equipped with advanced thermal control capability to ensure technical parameters during the test work

 

6 look

6.1 the metal parts of the equipment in contact with the air are made of anti-rust materials, or as anti-rust treatment.

There will be no corrosion.

6.2 the fastener of the equipment is secure and free of loose.The rotating parts are flexible and free of wear.

6.3 the appearance of the equipment is beautiful and easy to clean, and the surface treatment is reliable and non-shedding.

6.4 the device is easy to operate and easy to touch.

 

7 working conditions:

7.1 working voltage: 220V plus or minus 10%

7.2 power supply frequency: 50Hz + 1Hz

7.3 equipment maximum power: about 3.8 kW

7.3 guarantee the normal work of the equipment of the environmental temperature 5 ℃ ~ 35 ℃

7.4 environmental humidity of ensuring normal working of equipment: 20% ~ 85%.

 

8 measurement and control system:

8.1 temperature sensor: Pt100 platinum resistance

8.2 humidity sensor: platinum resistance dry wet ball

Control instrument: microcomputer control instrument

8.4 adjustment mode: PID, the microcomputer adjusts the PID according to the setting temperature/humidity and the measured temperature/humidity, and adjusts the heating power to control the temperature/humidity and change in the box.The temperature/humidity in the work room is precisely stable in the desired setting value

8.5 pressure protection: when the refrigerating line exceeds the pressure limit, the compressor power is cut off to prevent the compressor from being damaged.

8.6 overload protection: when the current of the power supply is too large, the overload protection automatically starts, cutting off the power to avoid causing the accident.

8.7 overtemperature protection: when the temperature of the studio is too high, the overtemperature protection automatically starts, and the heater power is cut off so as not to cause the accident.

Working text: Chinese

 

9 main configurations:

9.1 heater: domestic high-quality heating tube

9.2 humidifier: domestic high quality heating tube

9.3 air switch, insurance, ac contactor, motor, fan, switch, indicator light and other low-voltage appliances: domestic quality products

9.4 insulation materials: polyester foaming agent

9.5 heating/humidifying drive: thyristor

9.6 refrigeration units: two sets of refrigeration system composed of totally enclosed compressor

9.7 refrigeration auxiliary parts: main refrigeration fittings and control devices are imported originals:

9.7.1 import pressure controller

9.7.2 imported solenoid valve

9.7.3 import filters

 

10 safety protection measures:

10.1 safe and reliable grounding protection device

10.2 ground mark

10.3 overvoltage protection

10.4 overload protection

10.10.5 overtemperature protection

10.6 compressor temperature limit protection, when the working temperature is endangering the operation of the compressor, cut off the compressor power supply

10.7 compressor protection, if the device is immediately restart after shutdown, compressor are likely to be burned, this is a very easy to produce wrong operation, in addition, the plug contact undesirable can cause similar results, our system to ensure that the compressor has plenty of downtime, avoid unnecessary damage.

 

11 unique techniques

The sensor is a high precision platinum resistance dry wet bulb (i.e., ventilation dry wet table). It is almost free of drift and is an international standard instrument for humidity

The draught dry wet table and the whole machine should integrate into one.

Wet ways: surface escape.

Does refrigerants, environmental protection, according to the Montreal convention, China already stop production, freon refrigerant and refrigerant are all adopted by other companies freon products, such as R12, R13, R22, r114, etc.It's getting harder and more expensive to buy these refrigerants.

Using the self-developed microcomputer controller to automatically manage the operation of the equipment, the operation is very simple, the user can only set the required temperature and humidity.

Does around the world in recent super computer virus infection, main object for WindowsCE, WindowsCE for PLC proprietary operating system, we adopted the self-developed high-precision controller, the controller has no operating system, can't be infected with virus!

The long-term follow-up of professional verification institutions shows that the use of the adjustment panel to improve technical indicators is highly deceptive, and this product is very unstable.The product of our company does not need to adjust the windboard.

Does daiwa science was founded in one hundred years ago, most of the products manufactured by the company controller is developed for our company, adopted by the controller for scientific instruments of the key components, our company have advanced technology has won the acceptance of the developed countries, the products have good quality guarantee!

The suspended objects do not need to be fixed to swing, but once they swing, they have difficulty reading and collision.

Structural features: full geometry, ensure that there is no dead Angle in the square working chamber, and the temperature and humidity uniformity index meet or exceed the technical specifications specified by the rules.

Our company adopts direct heating/wet working mode, constant temperature and humidity rapidly.And other companies for the degree of uniformity and humidity uniformity to meet code requirements, have to take some measures to remedy, the most commonly used method is and indirect heating and cooling water jacket type structure works, to some extent, this kind of structure can improve the evenness index, but the result is not very desirable, to improve the evenness index after still difficult to achieve procedures.Also, this structure has some serious problems: the first is: due to the working principle of the way is through the water in the heating or cooling jacket to control water temperature, and, in turn, affects job of indoor temperature, constant temperature is indirectly affected by work outside the water temperature, so temperature is extremely slow, usually in 3 hours!!!This is a long process that will crash any operator.The second is: this process is not only a long wait, if a test is completed shall be for the next test, had to open the doors of the equipment, as long as one to open the door, is to repeat the long suffering to operators.Third: the water jacket, there exist great luck equipment composition, only a handful of such devices will have a long life, no matter whether you use the equipment, water will corrode metal shell, shell once water seepage, the device is the toilet.Fourth: winter in the north is colder, and once it freezes, the broken shell equipment will be scrapped.

The front has a large size observation window and the ultra wide viewing window behind it, which makes reading and observation very convenient and does not observe the dead Angle.

In simplified Chinese, the unit symbol of the parameter display (LED cannot be displayed), the operation interface is friendly.

Strong self-diagnosis and self-protection function.

No other performance is lower than other products.