Home Appliances Inspection are subject to strict restrictions, such as RoHS, CE Marking, EMC Directive, CCC, and WEE etc, as the home appliances are intended for use by end-consumers. Due to the nature of the industry, with production often taking place in various factories, quality assurance can be challenging.

SIT has decades of experience and is trusted by companies worldwide to deliver home appliances ‘quality-assurance solutions. We have a team of quality-assurance experts and offer quality-assurance inspection services of electric appliances for a wide range of home appliances . And SIT quality-assurance experts conduct every step of inspection according inspection EN55035,EN6100,EN6213,EN50698,EN50498,EN50698,EN60335-1/-2/EN55014,UL1950,UL1459,UL1492,UL1082,UL982,UL1278,UL2056,UL2089,UL2743 and more.

With our customized checklists and qulity-assurance experts guarantee that your home appliances adhere to the highest quality with IEC,UL and CE safety standards.

Key Aspect of Quality-Assurance Inspection for Home Appliances

> Carton drop test 

With ISTA 1A,To ensure product quality and its survival from factory to port to across the ocean, carton strength is a vital consideration. A carton drop test is a procedure used to verify your carton can protect the products inside when being dropped multiple times and from different angles.

> QR code & barcode verification

Ensure all barcodes are clear, correctly typed, and properly positioned. Test barcode readability using a scanner to confirm they correspond with the product information.

> Visual Inspection

Starting with a careful visual check of the appliance. Look for signs of wear, damage, or tampering. Examine the power cord for fraying, cuts, or any exposed wires, and inspect the plug for cracks or loose connections.

This initial inspection is critical, as it can reveal obvious issues before they lead to more significant problems.

Ensure the casing of the appliance is intact, with no cracks or signs of overheating. Pay special attention to areas where the cord meets the plug and the appliance, as these are common points of failure.

> Smell check  

Smell check for home appliances  if there are any strong offensive odor(such as burning,oily smell,musty,sour odor and chemical odor

> Adhesion test to logo / printing /coating by 3M tape  

Test procedures: applying 3M600/610 adhesion tape completely to the screen printing logo/marking. then quickly pull up the tape to the upward direction of 45 degrees. Repeat this procedure three consecutive times. Test judgment: if the printed pattern of the products is notched. Or the stitches are broken the test then fails.

> Rub test to logo/printing by alcohol  

Perform a rub test for printing and marking ; Adhesive test for coating if applicable-For rub test: The durability of the marking is checked by trying to remove it by rubbing lightly for 15 s with a piece of cloth soaked with water and, … no curling.

> Assembly & installation check   

Assembly/ installation according to the instruction manual or guide on package to see the component is complete, assembly steps is suitable & the finished product is good performance

> Strain relief test 

The strain relief test is conducted on products that have an electrical cord or cable permanently
attached to the product. This includes power cords, output cords, jumper cables, daisy chain
cables, etc.some standards specify 25 pulls for 1 second each.
The pull force for this test usually depends on the product weight, with test forces of
30, 60, & 100N being commonly used.

> Stability test

To determine the stability of electric appliances which are unsed on a table or on the floor.Which shall not tip over when tilted to a 10 degree angle in any direction( for electric heat appliance increase to 15°).

> Temperature rising test

Evaluates the temperature rise of components during operation, ensuring that they do not overheat and pose a fire hazard

> Hi-pot test   

Hi-pot testing, short for high potential or high voltage testing, is a critical step in the manufacturing process of electrical equipment and systems. It involves applying a higher-than-normal voltage to a device or component to assess its insulation integrity and overall safety. This procedure is essential for detecting potential vulnerabilities and ensuring that the equipment can endure the pressures it may face during proper functioning.

> Earth continuity test 

Checks the connection between the earth pin of the plug and the accessible metal parts of the appliance to ensure it provides a safe path for electrical current.

• A continuity measurement with a test current up
to a maximum of the order of 25 A (The hard test).A continuity measurement should be made with a
test current not less than 1.5 times the rating of
the fuse and no greater than 25 A for a period of
between 5 and 20 seconds.
•  A continuity measurement with a short-circuit test
current in the range 20 to 200 mA. (The soft test)

> Leaking current test

Measures the amount of current that leaks from the appliance, ensuring that it remains within acceptable limits to prevent electric shock.

> Standby power test

To perform a standby power test on a home appliance,use a plug-in power meter for a simple home check, or a power analyzer for a more precise test that follows the official IEC 62301 standard. The process involves plugging the appliance into the meter or analyzer, putting the device into standby mode, and recording the power consumption, with the standard recommending specific conditions like a constant temperature of \(23\pm 5\degree C\) for accurate results. 

> Power consumption test

By following this testing approach which can definitively state whether an appliance’s power consumption is within the specified +5% / -10% tolerance of its nameplate rating.

> Power-on test

Power-on test for home appliance involves first performing a safety check to ensure the electrical supply is sound, then using a multimeter for conductivity and voltage checks while the appliance is off, and finally a functional test to ensure it operates correctly and safely. For some appliances, a power

> Function menu test

Ensures that all menu items and sub-menus are accessible and lead to the correct pages or functions.

> Touch key button check

Is a fundamental usability and quality assurance procedure for any appliance with a touch interface (capacitive, resistive, or infrared). Here’s a comprehensive test protocol.

To verify that all touch keys/buttons on the appliance respond correctly, reliably, and as intended under normal and edge-case conditions.

> Fatigue test to button/key

Verify durability and lifespan: The primary goal is to evaluate the durability of butto /key’s components and predict its expected lifespan by 100 times

> Rotational speed test

Verify that the appliance’s motor maintains a rotational speed (measured in Revolutions Per Minute or RPM) that is within a specified tolerance ±10% of its designed or advertised speed under various load conditions.Ensures that the rotational speed of an appliance’s output shaft (or attachment) meets the design specifications under no-load, rated-load, and overload conditions. This ensures performance, consistency, and motor health.

> Noise level test

The appliance is set to its typical operating mode, and its noise is measured during this time.and then sound pressure is measured at specific, standardized distances (e.g., one meter) from the appliance. Sound power is also measured, which provides an absolute value that is independent of the room or distance.
Evaluation noise levels are compared against regulatory limits and internal benchmarks to ensure compliance IEC60704.

> Internal structure check

Internal structure check for home appliance verifying compliance with safety and technical standards, accordance with those under the CE certification for the EU market, which includes LVD, EMC, ErP, RoHS, and WEEE.‌ ‌

> CDF verify

Component verification physically checks the appliance to ensure the components (such as circuit breakers, switches, and power supplies) match the brand, model number, and ratings specified in the CDF.

Conformity marking that the critical components will have conformity marks (like UL, TUV, or CE) listed in the CDF, and these marks must be present on the actual parts in the appliance.

> Endurance test

An endurance test for an appliance is a long-term evaluation designed to assess its durability, reliability, and ability to withstand repeated use over time. This includes testing for mechanical and electrical failures by subjecting the appliance to repeated operations, stress, and specific environmental conditions, which can help identify weaknesses and ensure long-term product stability. Common endurance tests involve the repetitive opening and closing of doors, switching components on and off, and other cycle-based actions until the appliance fails or reaches a predetermined number of cycles.

Home Appliance We Can Inspect

> Large home appliances: LED TV,air conditioners, dishwashers, freezers, refrigerators, washing machines, dryers, cooking equipments,electric water heaters,kitchen hoods,exhaust fans.

> Small appliances: microwaves,ovens,rice cookers, pressure cookers,sandwich makers, toasters, coffee makers ,air fryers, ice makers, irons, vacuum cleaners, blenders, electric toothbrushes, hot water equipments,electric kettles,hand mixers ,juicers,electric fans.