Product Description

Compressor Evaluation Test Device (CETM), this equipment can examination all auto air situation compressor in the market.

Set up of automobile compressor and contral volve to the equipment: 

Backside of the machine:

1.  Flow Management Adjustment
      – twelve / 24 VDC
      – Nitrogen / Air Supply In
      – Dump
two. Laptop Interface

Computerized Ttight the Pulley Belt by Click One Button:

Studying and document the pressures adjust inside of compressor:

Introduction 
The A/C Compressor Evaluation Examination Equipment (CETM) is created to evaluate compressors with out the operator needing to be familiar with the design and functionality of compressors. 2017 current CETM device has been made for compressor companies and remanufacturers with more automation and ability. The test imitates the hundreds that would be set on a compressor in an actual car air conditioning system. 
The CETM needs a personal computer loaded with the TDS Compressor Analysis Application (TCES). 
A record of compressor models is provided in the computer software for usefulness, but it is possible to examination any compressor with a provided pulley diameter and displacement for every revolution. It is not required to know if the compressor is a fixed or variable model…the equipment can establish the difference and operate the right take a look at for both kind. 

Fast Start 
The CETM is simple to use. Mount the compressor on the common bracket. Align the bracket with the pulley and make sure the belt is straight. The compressor ought to be oiled and any excess oil drained from the compressor. Ensure that the hoses are correctly linked. It is not essential to have a measurement of the crank situation force but it is beneficial for diagnostics. 
Begin the plan and guarantee the device is speaking with the personal computer. This is confirmed by the position coloration on the DL405 PLC Communications panel changing from purple to green. 
The application is composed of 3 (3) screens: 
Variable Animation Display -This monitor provides a look into the interior of a generic variable displacement compressor. When the compressor animation ontheleft is energetic it signifies the compressor is working at bare minimum displacement. The compressor animation on the correct is energetic when the compressor is running at complete displacement. The input values at the bottom of the screen demonstrate the stress inputs in true time. 

Set up Display screen The calibration of the inputs is proven on this display screen. These are manufacturing unit established for each and every machine and should not be changed. The examination time is also established at the factory. The generate motor on the CETM can operate CZPT or backward. Most compressors will operate forward. 

The best way to operate a take a look at is to use the fall down listing of compressor varieties outlined in the “Select Compressor Kind” field to choose a compressor design that greatest signifies the compressor being analyzed. Pick the design type from the listing and click on the “Ok” button.  
 
It is attainable to develop your personal record that will immediately populate the report page or printout. Use the textual content file supplied by TDS and modify it to create your own textual content file. This file is named TheList.txt and is positioned in the C:/TDS/ listing. 
Open this listing in a text editor these kinds of as Notepad and you will be capable insert or take away compressor types. Make positive to hold the same structure and the final line of the file Must be “None,,,,”. 
Beneath is a sample of the needed format: 
10PA20,2000,MyPartNumber,10PA20HX234,Denso 
Very first,one hundred fifty,Part1,Model1,Mfg1 
Two,one hundred sixty,Part2,Model2,Mfg2 
3,1700,Part3,Model3,Mfg3 
None,,,,0 
As an instance the first line could be a 10PA20 compressor. The line would read through: 
10PA20,2000,MyPartNumber,10PA20HX234,Denso 
Note: The displacement for every revolution is multipliedby10 if it is a fixed displacement compressor !
When the Custom Listing is loaded the listing equipped with the machine will be quickly unavailable until finally the system is stopped and restarted. The Custom made Record is included by clicking on the command button situated up coming to the drop down listing. 
Functionality Report Display -Following choosing the compressor variety you should go to the Overall performance Report display screen to enter the compressor clutch diameter. This measurement is in millimeters. 
When this is accomplished you want to ensure the compressor is correctly aligned. This is achieved by relocating the common test bracket. 
Press the start button. 
As soon as the examination is complete press the print button on the Set up screen. This will print the examination report and save the information to disk. 

Theory of Operation 
A vehicle air conditioning compressor is essentially a pump designed to transfer a gasoline via a shut technique. There are a lot of varieties of compressors and they come in many dimensions. For the CETM to take a look at a lot of kinds of compressors the program has to be programmable so that the test dynamics for all models make comparable benefits within a specified selection. This is accomplished by entering the displacement for every revolution and the pulley diameter in the fields at the base of the Overall performance Report screen. Employing the information from these fields a calculation is done and the generate motor speed is altered to compensate for the measurement of the compressor. 
As mentioned before, the test imitates the loads that would be put on a compressor in an real motor vehicle air conditioning method. When the take a look at is commenced current is despatched to an air stress transducer that adjusts the suction strain to approximately 3 bar. This is nicely earlier mentioned the pressure which would end result in a freezing evaporator and is also large enough to simulate a medium to large warmth load on an evaporator. If the compressor is a variable displacement compressor the inner mechanical control valve must have been set at the manufacturing unit to outcome in a crankcase pressure equal to the suction force. 
The suction force is then altered down to a stress that signifies a lower heat load or a freezing evaporator temperature. If the compressor is a variable compressor the discharge strain ought to drop all the way down to unload the compressor. The suction strain is then improved again to the substantial load situation. The discharge force must go up once again. If it is a fixed displacement compressor the discharge strain will drop proportionally to the suction stress. 
The discharge strain is elevated by placing a restriction in the discharge line. For this check the restriction is an adjustable orifice inside of a metering valve. The force fall throughout an orifice is straight proportional to the mass flow fee. Consequently, when the compressor drops to least displacement the mass flow rate drops. When the equipment is shipped the metering valve is set to fix the orifice measurement. This is done to established the optimum discharge force wanted. All compressors must attain roughly the identical highest pressure at their optimum output. This greatest stress can be modified with the metering valve. It is suggested that no adjustments be produced to this valve. 
Be aware: If you change this valve it could be necessary to change the “Peak” placing found at the bottom proper corner of the Performance Report display screen. 
The “Peak” setting is the maximum pressure differential a excellent base line compressor will achieve. If this is established way too lower poorly doing compressor will pass, and if it is set also substantial great compressors will fall short. This placing is extremely essential and fantastic care ought to be taken prior to it is modified. 
The CETM has a frequency inverter to alter the pace of the travel motor. This inverter also sends info to the pc on the sum of energy currently being utilized throughout the take a look at. Extreme power can consequence in bad durability of the generate motor. 
Data 
The CETM has 2 strategies for examining the outcomes of the examination.

one. The first strategy is the evaluation of the indicators for “Stream End result” and “Control Valve” positioned on the “Overall performance Report display screen. These give an estimate for the operator who is not familiar with how a compressor ought to perform. 
The “Stream End result” demonstrates an evaluation of the flow functionality of the compressor. This is determined by stress thresholds. As talked about beforehand the mass flow fee is proportional to the strain drop across an orifice. If the greater discharge pressures are not received the flow will not be optimized. The settings exhibiting a drop in compressor functionality are agent of ten% drops in the pressure created by the compressor. “Very good” will be 10% lower than “Excellent”, “Suitable” will be twenty% reduced than “Superb”, and so on. It does not essentially translate to the temperature of the air coming into the passenger compartment of the motor vehicle. It is as an alternative representative of the compressors efficiency. A stress drop of ten% might only reflect a tiny volume of temperature adjust of the air that the passengers could not recognize. 
The “Handle Valve” evaluation isa little a lot more intricate and is damaged down as follows: 
Full Function – This is when the compressor drops to a relatively low suction pressure as the compressor drops to bare minimum displacement. 
Portion Function – The analysis will give this looking through when the discharge pressure falls lower but not to bare minimum. It means the compressor will lower the displacement volume but not totally. This can consequence in the load on the motor not reducing when the optimum discharge strain of the compressor is not needed. Even though the drivability of the vehicle might not be affected this does violate the design and style intent of the variable compressor. 
Poor Perform – This can only come about if the crankcase stress detects that the interior mechanical manage valve is doing work but could not detect an satisfactory fall in the compressor functionality. It indicates that there may not be ample flow through the manage valve or the compressor is bypassing gas faster than the flow via the valve.  

None Detected This takes place when no crankcase pressure is detected or the crankcase in no way rises earlier mentioned the suction stress. This might occur if the internal management valve is not functioning at all or the compressor is a fixed displacement design. 
Does Not Have This is the looking through when a fixed displacement compressor design is selected. 
The inner mechanical management valve examine is skipped. 
 
2. The next technique is for operators that are more experienced with compressors or who are seeking to get far more information than the indicators provide. Employing the graphical fields located reduce on the “Overall performance Report” display screen, the stress curves and power attract of the compressor can be evaluated. The knowledge is also saved to the computer tough disk, and can be imported into a spreadsheet this kind of as Excell. 
 
Check Equipment Specifications 
Equipment Variety…………………..Automated PLC managed variable and fixed displacement compressor analysis check equipment and computer loaded with TDS Compressor Evaluation Application (TCES) (monitor and printer not presented) 
Compressor Travel……………….Clutch belt drive to accommodate multi-groove and V-belt pulleys 
Motor……………………………………….Five horsepower premium performance inverter rated 
Speed………………………………………Variable speed motor controller – to 1750 rmp 
Voltage……………………………………Dependent on accessible 3 phase electrical energy accessible at the set up ocation 
Minimal Aspect Keep track of………………..2.5 inch to 160 CZPT liquid crammed gauge & to one hundred CZPT force transducer 
Large Facet Monitor………………2.5 inch to 300 CZPT liquid crammed gauge & to five hundred CZPT force transducer 
Sump Keep an eye on……………………..2.5 inch to 160 CZPT liquid crammed gauge & to one hundred CZPT pressure 
transducer 
Compressor Mounting……..Universal bracket 
Belts Presented………………………A single multi-groove serpentine belt and 1 V-belt 
Push Belt Tentioning………..Air cylinder tensioned idler pulley 
Check Abilities…………………..Fastened displacement and variable displacement with printed examination report 
Proportions…………………………..24 inches vast x 32 inches substantial x thirty inches deep 
Bodyweight……………………………………Around 250 lbs 
Paint………………………………………..Polane T In addition Polyurethane Enamel
Machine Color……………………..Nitro Blue 
Created in United states
Basic safety Features 
Safety Guard with Interlock…………..Motor can’t operate with out security guard closed and will end if the guard is opened 
Emergency Quit Button…………………….Quickly shuts down all functions when pushed 
 
ZheJiang CZPT Mechanical Parts Co.,Ltd , the Completely Approved Seller for  TDS  CETM (A/C Compressor Evaluation Examination Device ) 

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Choosing an Air Compressor

Considering a new Air Compressor? Here are some tips to make the decision easier. Learn the pros and cons of each type, including the differences between oil-injected and oil-free models, single stage and positive displacement. In addition, learn more about the different technologies that are available for your air compressor. It is important to choose an appropriate unit for the type of work you do. Here are some of the best compressors available today.

Positive displacement

There are several different types of air compressors, but most are positive displacement air compressors. They use a rotary or reciprocating component to compress air. The reciprocating component compresses air by reducing the volume of the chamber. Positive displacement compressors are used in bicycle pumps, chemical plants, and refrigerators. Positive displacement air compressors use multiple inlet ports. Despite the various types, the principle of operation remains the same.
Another type of positive displacement air compressor is a reciprocating piston. The piston inside a cylinder moves up and down, causing the compressed air to fill the upper part of the cylinder. These air compressors are used in a variety of different applications, including blowing bottles and gas pipelines. These air compressors can be water-cooled, lubricated, or non-lubricated. Different types have different capacities and air pressures.
A positive displacement flowmeter uses a rotating chamber that divides continuous fluid into discrete portions. The number of times the chamber is filled and discharged can be used to estimate the flow rate. The rotation speed of the measuring chamber is directly proportional to the flow rate. The drawbacks of this type of positive displacement flowmeter are that it is prone to jamming. If the fluid contains particles, it may be too thick for the meter to determine flow rate.
A negative displacement air compressor was invented in 1860 and is the oldest type of compressor. It uses two lobes positioned in a circular cavity. One rotor is connected to an engine, while the other pushes the other one to spin in the opposite direction. Negative displacement compressors are low-maintenance, but they do require more precision. They are often used in nuclear power plants because they use the kinetic energy of the rotating elements to produce pressure.

Oil-injected

Oil-flooded or oil-injected air compressors use liquid to seal and lubricate moving parts and reduce noise. Oil-flooded air compressors are effective for a variety of pneumatic tools and accessories. Some models have a thermostat that controls the amount of oil used during operation. Other types of oil-flooded air compressors are piston-type models. Here is an overview of the basic differences between these two air compressors.
An oil-injected air compressor is more expensive than a comparable oil-free air compressor, but its advantages far outweigh its disadvantages. An oil-free compressor is quieter, requires less maintenance, and has a lower price tag. It also offers a greater degree of air purity. A number of other advantages may also make this type of air compressor the better choice for many industrial settings. If you need a high-pressure compressor in a tight space, consider the benefits of an oil-free system.
Oil-injected air compressors require more maintenance than oil-free models. Both types of air compressors offer similar capacity and ISO 8573-1 Class 0 and 1-2 purity, but the oil-injected systems require more air-treatment components. They require an activated carbon filter and coalescing filter. Oil-injected air compressors will likely remain the standard for industrial air compressors for many years. And since their performance and efficiency are comparable, it may be worthwhile to invest in some point-of-use air treatment.
Both types of air compressors have their benefits. However, choosing between oil-free and oil-injected air compressors is not as straightforward as you might think. Whichever type you choose, make sure it will meet your needs. The benefits of an oil-injected air compressor outweigh their disadvantages. In general, oil-injected air compressors are more durable and can last longer than oil-free models. The only downside is their higher price.

Oil-free

When choosing an air compressor for your company, you’ll need to determine what it is going to be used for. For example, if you’re planning on using it to power multiple workers, you should consider getting an oil-free compressor. An oil-free compressor, on the other hand, is quieter and can power several workers at a time. If you’re a contractor, the most important consideration will be the type of jobs you’ll be doing. Higher air pressure means greater demand for air flow, and more pressure can damage the equipment.
Oil-free compressed air is certified 100% free of contaminants. Technically, oil-free air is not completely free of foreign matter, but it is extremely low within the limits of practical air quality. A technically oil-free air compressor might have a total oil level of 0.003 mg/m3. If you’re in need of a technically oil-free air compressor, you must install an air treatment equipment after your current compressor.
If you’re in the manufacturing industry, a good oil-free air compressor will save you money and reduce your environmental impact. Many of these tools require air compressors to work, and this equipment will ensure that they don’t get contaminated. To buy the best oil-free compressor, you should learn a bit about the different terms used by compressor repair companies. ACFM, for example, is the amount of air that can be compressed in one minute at rated conditions.
When you’re using an oil-free air compressor, you should know that the overall life of the device will be much shorter. Compared to an oil-flooded rotary screw air compressor, an oil-free compressor typically has a lifespan of 50 thousand hours. But it’s important to understand that this type of compressor can still cause damage to piping and processes. Therefore, you should choose an oil-free compressor when you need to clean air for your business.

Single-stage

A single-stage air compressor, also known as a piston air compressor, compresses air only once before storing it in a cylinder. This stored air has enough energy to power a variety of pneumatic tools, such as screwdrivers, chisels, and wrenches. These units are also ideally suited for low-flow applications and are widely used in gas stations, auto shops, and various manufacturing plants.
A single-stage air compressor uses two valves – one for inlet and one for outlet – to transfer compressed air. Both valves are actuated by springs. The inlet valve has a slight curvature to provide protection from damage. The compressor’s outlet valve opens when the pressure in the cylinder is higher than the pressure in the storage tank. The piston moves very quickly inside the cylinder, exerting a high amount of force throughout the compression process. This high piston speed is a common cause of compressor wear and tear.
A single-stage air compressor is ideal for smaller tradesmen and small construction crews. Its lightweight and compact design make it easier to transport and store. While it may be tempting to buy the first cheap air compressor you see, it’s important to balance the price against performance to choose the right air compressor for your needs. The best single-stage air compressor is one that provides excellent performance and durability. Its two-stage counterpart is designed for larger construction teams and large applications.
The main difference between a single-stage and a two-stage air compressor lies in their capacity. A single-stage air compressor compresses air only once and delivers it into the storage tank, while a two-stage compressor compresses it twice, creating double the pressure. Because of this, single-stage air compressors are cheaper and versatile than their counterparts, which means that they can be used for multiple purposes.

Low-noise

A low-noise air compressor is a type of industrial compressor that is less noisy than regular air compressors. These are generally smaller machines designed for smaller factories and workshops with a few to several employees. They are designed to handle mid-weight volumes of compressed air per day. This type of compressor is especially useful for smaller manufacturing businesses that need to produce compressed air for medical applications. Small breweries can also benefit from the low-noise capabilities of these compressors.
Low-noise air compressors come in various sizes and features. For smaller jobs, you can purchase a one-gallon model that is lightweight and portable. For larger jobs, you can purchase one with a larger tank that can provide more pressure for longer jobs. However, a larger tank will make the compressor heavier and harder to transport. To avoid this, make sure to check the size of the tank and how much power it can handle.
Considering a low-noise air compressor for your business? If so, you’ve come to the right place. There are a variety of affordable and dependable low-noise options to choose from. A CAT 10020C, for example, is designed to provide high-volume air to many outlets at once. A CAT 10020C comes with a 10-gallon tank, wheels, and a carrying handle.
Noise levels can also affect the productivity of employees. When employees work with air compressors in close proximity to each other, they may develop tinnitus. If employees are free from tinnitus because of the loud noise, they are likely to work more efficiently. Moreover, it will be easier for them to focus and communicate efficiently. If you need a compressor, a low-noise one is an excellent choice.

editor by CX 2023-03-30