UL 923 Microwave Oven Door Test Equipment
The UL 923 Microwave Oven Door Test Equipment is a stainless-steel spring-force application device developed for the microwave oven door opening and closing procedures referenced in UL 923 Clause 40.2. Available with 66 N, 89 N, 133 N and 222 N force options, it supports laboratories in applying selected mechanical forces during household and commercial microwave oven door evaluation.
- Standards-Based Door Testing
The Microwave Oven Door Test Equipment supports the door operation procedures referenced in UL 923 Clause 40.2. Clause numbering should be confirmed according to the standard edition used by the laboratory. - Applicable Microwave Ovens
Suitable for household and commercial microwave cooking appliances, including applicable hinged and sliding door designs. - Selectable Test Forces
Available with four force options for opening, closing and related microwave oven door assembly procedures. - Extended Laboratory Configuration
Microwave survey meters, door endurance testers, impact devices and additional test accessories are supplied separately.
UL 923 Microwave Oven Door Test Equipment Product Overview
A microwave oven door forms part of the appliance’s microwave containment and safety interlock system. Mechanical stress may affect the position of the door, hinges, latches, viewing screen, sealing surfaces or interlock components.
The UL 923 Microwave Oven Door Test Equipment enables laboratories to reproduce the spring-applied door movement required by the referenced test procedure. After testing, engineers can inspect whether the door remains intact, correctly aligned and suitable for subsequent safety evaluation.
The Microwave Oven Door Test Equipment performs the force-application portion of the procedure. Microwave radiation emission measurement requires a separate microwave survey meter when specified by the complete test program.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | UL 923 Microwave Oven Door Test Equipment |
| Applicable Standard | UL 923 |
| Primary Referenced Clause | Clause 40.2 |
| Available Force Options | 66 N / 89 N / 133 N / 222 N |
| Spring Constant | 1.05 N/mm |
| Material | Stainless steel |
| Test Object | Microwave oven door assemblies |
| Appliance Types | Household and commercial microwave cooking appliances |
| Applicable Door Designs | Hinged or sliding doors, depending on the selected procedure |
| Product Certificate | CE certificate |
| Microwave Survey Meter | Supplied separately |
| Additional Test Fixtures | Available separately upon request |
Force accuracy, tolerance and calibration documentation are not specified in the current product information. These requirements for the UL 923 Microwave Oven Door Test Equipment should be confirmed separately when relevant.
Test Purpose and Safety Relevance
Microwave oven doors are repeatedly opened, closed and subjected to mechanical forces during normal use. Door assembly testing helps evaluate whether these forces may affect:
- Door alignment
- Hinges and hinge supports
- Latches and locking components
- Safety interlock operation
- Viewing screen barriers
- Door seals and sealing surfaces
- Door position relative to the enclosure
The Microwave Oven Door Test Equipment performs the force-application portion of the procedure. It does not independently measure microwave radiation emission or determine the overall compliance of the appliance.
UL 923 Microwave Oven Door Test Equipment Test Method
UL 923 Microwave Oven Door Opening and Closing Test
The door starts from a position approximately midway between fully open and fully closed. The selected device applies force in the intended direction while an opposite restraining force controls the initial movement.
Door Opening Test
For the UL 923 Microwave Oven Door Test Equipment opening procedure, the force is applied from the midpoint position toward the fully open position.
For a hinged door, the force is applied to the inside surface near the free edge. For a sliding door, it is applied to the handle in the intended direction of travel.
Referenced minimum opening force: 66 N
Door Closing Test
The closing procedure starts with the door approximately midway between fully open and fully closed.
For a hinged door, the force is applied to the outside surface near the free edge. For a sliding door, it is applied to the handle in the closing direction.
Referenced minimum closing force: 89 N
Spring-Applied Impulse Principle
The UL 923 Microwave Oven Door Opening and Closing Test uses a spring device with a listed spring constant of 1.05 N/mm.
Releasing the opposite restraining force allows the stored spring energy to move the door to its fully open or fully closed position.
Standard Edition and Clause Mapping
The original UL 923 Microwave Oven Door Test Equipment documentation references UL 923 Clause 40.2. In other editions of UL 923, the corresponding all-door operation requirements may appear under Clause 45.2.
UL 923 Clause 45.2 Spring Scale
The term UL 923 Clause 45.2 Spring Scale refers to the spring scale or equivalent force device used to produce the specified microwave oven door movement.
Customers working with a UL 923 Clause 45.2 Spring Scale requirement should provide the applicable standard edition so the clause mapping and force configuration can be checked.
Force Options and Selection
The UL 923 Microwave Oven Door Test Equipment can be supplied with a selected nominal force of 66 N, 89 N, 133 N or 222 N.
| Force | Typical Application |
|---|---|
| 66 N | Minimum force associated with the Clause 40.2 door opening procedure |
| 89 N | Minimum force associated with the Clause 40.2 door closing procedure |
| 133 N | Optional force for related commercial microwave door assembly requirements |
| 222 N | Optional force for related side-hinged or bottom-hinged door procedures |
Force selection should consider the applicable UL 923 edition, test clause, appliance classification, door construction and installation arrangement. This product does not include 445 N or 667 N force configurations.
Product Features
The UL 923 Microwave Oven Door Test Equipment is designed around a defined force-application function for microwave oven door assembly evaluation.
Four Force Configurations
Available in 66 N, 89 N, 133 N and 222 N versions.
Specified Spring Response
Listed spring constant of 1.05 N/mm.
Stainless-Steel Construction
Suitable for regular handling in appliance laboratories.
Dedicated Force Application
Designed for a standards-related door movement procedure.
Compliance Scope
The UL 923 Microwave Oven Door Test Equipment supports the door operation procedure referenced in UL 923 Clause 40.2. It does not represent a complete UL 923 test system or provide UL certification for the microwave oven being tested.
Not included in the standard product:
- Microwave survey meter
- Automated door endurance tester
- Door impact test device
- Sample mounting fixture
- Anti-tilting arrangement
- Wooden dowel
- 445 N or 667 N force device
A CE product certificate is available. The CE certificate should not be interpreted as UL approval or UL certification.
Typical Applications
The Microwave Oven Door Test Equipment supports standards-related testing, engineering evaluation and internal quality activities for microwave oven door assemblies.
- Microwave oven product development
- Door hinge and latch verification
- UL 923 pre-compliance evaluation
- Household appliance safety testing
- Commercial microwave oven testing
- Factory quality assurance
- Third-party testing laboratories
- Certification preparation laboratories
Laboratory Test Workflow
A typical UL 923 Microwave Oven Door Test Equipment workflow includes sample identification, force selection, controlled spring-force application and post-test inspection.
- Confirm the applicable UL 923 edition and test clause.
- Identify the appliance type and door construction.
- Select the required 66 N, 89 N, 133 N or 222 N configuration.
- Install or stabilize the microwave oven in the required arrangement.
- Position the door and apply the actuating and restraining forces.
- Remove the restraint to produce the spring-applied movement.
- Inspect the door, hinges, latches, interlocks and sealing surfaces.
- Measure microwave radiation emission separately when required.
Laboratory and Procurement Value
The UL 923 Microwave Oven Door Test Equipment provides a dedicated device for a clearly defined door assembly procedure without requiring a complete automated endurance system.
Manufacturers
Supports design comparison and pre-compliance evaluation.
Testing Laboratories
Provides a clause-oriented force application device.
Procurement Teams
Allows force devices and supporting instruments to be selected separately.
Configuration Notes
The standard supply of the UL 923 Microwave Oven Door Test Equipment covers the selected spring-force device. A microwave survey meter and other laboratory accessories are supplied separately.
Additional equipment available upon request:
- Microwave radiation survey meters
- Microwave oven door endurance testers
- Microwave door impact devices
- Sample mounting and stabilizing fixtures
- Bottom-hinged door test accessories
- Customized force application devices
The final UL 923 Microwave Oven Door Test Equipment configuration should be selected according to the standard edition, required force, door type and complete laboratory test scope.
Compliance & Regulatory Assurance
TheUL 923UL 923equired for the referenced door operation test. Optional 133 N and 222 N configurations are available for related microwave oven door assembly requirements.
As with any standard-related test equipment, final compliance depends on the complete laboratory arrangement, including the applicable UL 923 edition, selected clause, appliance installation method, door construction, force application position, restraining-force alignment, post-test inspection and microwave radiation measurement where required. A separate microwave survey meter and additional door test fixtures can be supplied according to the project scope. The available CE product certificate should not be interpreted as UL approval or certification of the tested microwave oven.
Technical Inquiry & Expert Support
To confirm whether the UL 923 Microwave Oven Door Test Equipment matches your test requirement, please provide the key information below when sending an inquiry. This helps confirm the applicable standard edition, door type, required force and supporting laboratory equipment before quotation.
| Information Needed | Description |
|---|---|
| Applicable Standard | Confirm the applicable UL 923 edition and door assembly clause. The current product information references Clause 40.2; other editions may use Clause 45.2. |
| Appliance and Door Type | Household or commercial microwave oven, together with the installation arrangement and hinged, sliding, side-hinged or bottom-hinged door construction. |
| Required Force | Select the required 66 N, 89 N, 133 N or 222 N force configuration and confirm the required quantity. |
| Test Setup | Provide the sample mounting method, force application position, restraining-force arrangement and any existing laboratory fixtures. |
| Supporting Equipment | Confirm whether a microwave survey meter, door endurance tester, impact device, mounting fixture or other related equipment is required. |
| Documentation Needs | Confirm whether a product datasheet, CE product certificate, inspection record or other project documentation is required. |
Note: Final suitability should be reviewed together with the complete microwave oven test arrangement, applicable UL 923 edition, selected force configuration and required supporting instruments.
UL923 Microwave Cooking Appliances -Door Assembly Tests
UL 923 Microwave Oven Door Test Equipment Detail Display
UL 923 Microwave Oven Door Test Equipment FAQ
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