DUOYI DY522A Digital Manifold HVAC Gauge for Refrigeration HVAC Vacuum Pressure Temperature Tester with ball valve

DUOYI DY522A

Manifold Digital Meter High Low Pressure Temperature Gauge

Vacuum Pressure Leak Test Air Conditioner Repair Tools

Product Description

DUOYI 522A Intelligent electronic refrigerant group instrument is an auxillary instrument for the installation, testing and maintenance of refrigeration equipment such as air conditioners and cold storage. The instrument has double pressure test, dual temperature test, digital readout, multi-unit switching, multi-mode function and built-in refrigerant database.

The instrument uses high-strength engineering plastics and flexible non-slip silicone design, the whole machine is solid and comfortable to hold. Built-in 32-bit digital processing unit and high-precision data acquisition unit, high data and stbility. Large-size liquid crystal display,LCD backlight support, data display clear and easy to read, convenient light operation. Long-life valve switch, 1/4-inch standard interface design to ensure that the instrument's durabilty and versatility.

The instrument can measure double pressure (gauge pressure) at the same time, as well as dual temperature measurement, with automatic multi-unit pressure conversion, automatic conversion of temperature

Celsius/Fahrenheit, to facilitate different needs. Built-in 93 kinds of refrigerant pressure-evaporation temperature database, also calculate the subcooling superheat, to facllitate direct reading of operating process data. Also it tests percentage of vacuum measurement; pressure leak measurement,leak time speed record. It is deserved to have this multi-functional, accurate and simply operated digital manifoldlet you do the job right.

Advantages of ball valve with V-shaped opening

1. The fluid resistance is small, and the full-bore ball valve basically has no flow resistance.

2. Simple structure, small size and light weight.

3. Tight and reliable. It has two sealing surfaces, and various plastics are widely used for the sealing surface materials of the ball valve at present, which has good sealing performance and can achieve complete sealing. It has also been widely used in vacuum systems.

4. Easy to operate, open and close quickly, just rotate 90° from fully open to fully closed, which is convenient for long-distance control.

5. It is easy to maintain, the ball valve has a simple structure, the sealing ring is generally movable, and it is more convenient to disassemble and replace.

6. When fully open or fully closed, the sealing surfaces of the ball and the valve seat are isolated from the medium, and the sealing surface of the valve will not be eroded when the medium passes through.

7. Wide range of applications, diameters ranging from small to several millimeters, large to several meters, and can be applied from high vacuum to high pressure.

8. Since the ball valve has wiping properties during the opening and closing process, it can be used in the medium with suspended solid particles.

9. The degree of wear is relatively small, and the product life is longer.

Product Structure

1) Hook

2) LCD display

3) Unit button: pressure unit switch button

4) Mode button: test function mode switch button

5) Run/Stop button: Test Control Button In Leak Test Mode

6) Backlit button

7) Refrigerant observation window

8) Low pressure valve

9) 1/4 inch low pressure inlet

10) Refrigerant inlet/vacuum pump inlet

11）Zero button

12) R+/R-Refrigerant Type Selection Buttons:

Switch to select different types of working refrigerants

13) Power button

14) °C/° F button: temperature unit switch button

15) High pressure valve

16) Pressure release valve

17) 1/4 inch high pressure inlet

、

Product specifications

Pressure test: gauge pressure

Pressure test unit: Kpa; Mpa; bar; inHg; PSI.

Pressure test range: 0 Kpa - 6000 Kpa

Pressure test resolution: 1 Kpa

Pressure test accuracy: +/- 0.5 %(FS)+ 5dgt

Pressure overload limit: 10000 Kpa (10 Mpa; 100 bar;)

Vacuum test: relative vacuum

Vacuum test unit: Kpa; Mpa; bar; inHg; PSI.

Vacuum test range: -101 Kpa- 0 Kpa

Vacuum test resolution: 1 Kpa

Temperature test unit: °C (Celsius), °F (Fahrenheit)

Temperature test range: -40°C-150*C (-40*F- -302*F)

Temperature test resolution:

0.1°C (-40°C- -99.9°C). 1°C (100*C-150°C)

0.1°F (-40"F-99.9°F), 1°F (100°F-302°F)

Temperature test accuracy: +/- 0.5 °C + 2dgt

+/-0.99F + 2dgt

Bullt-in 93 kinds of refrigerant NIST

HOW TO PRESSURE LEAKAGE TEST

A. The instrument is power on with the blue and red valves turned off.

B. Press the Mode button to pressure leak test mode shown as below. The current pressure value is displayed at lower right corner of LCD.

C. Press the Run/Stop button to start the leak test, as shown below:

At this time, the lower left corner records the intial pressure value; the lower right corner shows the instantaneous pressure value; the "AP" display area shows the diffrence between initial pressure value and instantaneous pressure value.

The time display area shows how long the leak test lasts in the format of Hour : Minute (HH:MM). All the pressure units on the screen are the same. You can switch different pressure units by pressing the unit button.

The instrument can display the correspondingEvaporation Temperature (EV) and CondensationTemperature (CO) during the refrigerant pressure test, as shown below

Safety rules and precautions

This manual includes the use of instrument instructions and warnings for safe operation and maintenance. Failure to use the meter in accordance with the manual may damage the instrument. This instrument strictly follows the IEC/EN61010-1 safety standards for design and production.

1) The pressure measured by the digtal manifold pressure tester is gauge pressure.

2) Pressure testing ranges from -101Kpa to 6Mpa (-0.1bar to 60bar).

3) The limit pressure is 10 Mpa (100 bar).

4) The maximum operating pressure of standard hose is 600 PSI ( approximate 4.13 Mpa, 41.3 bar ). The limit pressure is 3000 PSI approximate 20.68 Mpa, 206.8 bar ).

5) Please confirm the rated pressure value of the tested equipment before testing. Do not use it if it exceeds the range of the instrument. If the packed hoses does not match the pressure requirement, you can use suitable replacements for testing.

6) Do not use and store the instrument in high temperature, high humidity, flammable, explosive and strong electromagnetic fields.

7) Please do not change the instrument internal circuit,to avold any damage of the instrument or danger occurring.

8) Please wear qualified protective equipment to protect user during testing.

9) Please use the instrument in a well-ventilated environment to prevent inhalation of toxic gases.

Packing List

1*Tool box

1*User manual

1*Tricolor tube

1*Test clamps

1*Main unit