Electrical Casing Compression Test Device

1. Basic Understanding of Equipment

1.1 Key Parameters

1.1.1 Equipment Technical Specifications

Parameters	Note
Control Methods	Touchscreen + PLC Control
Compression Method	Electric
Compression Force Value	50–1000 N, adjustable
Sensor Accuracy	1% FS
Compress Time	Adjustable from 1 to 99 minutes (seconds); once the compression time has elapsed, the system automatically releases pressure and retracts.
Displacement Resolution	1 mm

1.1.2 Applicable Standards

The LS-B21 Electrical Casing Compression Test Device strictly complies with GB/T 17466.1-2019″Electrical Accessories—Installation Boxes and Enclosures for Fixed Electrical Installations for Household and Similar Purposes—Part 1: General Requirements,” specifically Clauses 15.3 and 15.5 (IEC 60670-1:2021 Clauses 15.2 and 15.5), and is used to conduct testing.

It is primarily used in electrical appliance quality inspection laboratories, quality control departments of manufacturers, third-party testing organizations, and for import and export product inspections.

1.2 Equipment Configuration Verification

1.2.1 Unpacking

When unpacking the device, handle it gently to avoid scratching the outer casing with sharp tools. After unpacking, first inspect the exterior of the device to ensure there is no visible deformation or dents, and that the buttons are not damaged or loose. If you notice any abnormalities with the device or its accessories, do not turn it on. Please contact us immediately.

1.2.2 Main Unit and Accessories

Number	Note
①	LS-B21 Compression Test Device Main Unit
②	Power Cord

1.2.3 Downloading Electronic Documents

We have already sent download links for the electronic user manual, calibration certificate, warranty card, and other documents via email at the time of shipment. Please download them promptly. If you missed the email, you may also contact us directly to request the download links again.

2. Safety Precautions

2.1 Electrical Safety

Before connecting the power cord, verify that the supply voltage is AC 220 V ± 10% and the frequency is 50 Hz or 60 Hz;

You must use a three-prong outlet with a protective ground, with a protective ground resistance of ≤4 Ω. Under no circumstances should you cut or disconnect the protective ground wire, as doing so poses a risk of electric shock.

2.2 Environmental Safety

Do not use in environments with flammable or explosive substances, strong electromagnetic interference, high temperatures and humidity, or excessive dust levels;

Operating Environment: Temperature 5°C to 35°C, relative humidity ≤ 65% RH.

2.3 Operating Procedures

Improper operation can easily result in personal injury, equipment damage, and distorted test data; operators must thoroughly read this manual and strictly follow the procedures;

Remove jewelry before performing the procedure, tie back long hair, and do not wear loose-fitting clothing;

During the test, take precautions to prevent test specimen fragments from flying and causing injury;

During the test, do not extend your hands or tools into the fixture’s travel range to prevent crush injuries or accidents;

Operators must not leave their posts without authorization while the equipment is in operation; in the event of an abnormality, immediately shut off the power supply;

Do not perform tests that exceed the load capacity or stroke limit, and do not use damaged or non-standard fixtures.

2.4 Other

For matters not covered in this manual, please proceed with caution or contact us.

3. Equipment Overview

See Figure 3-1.

Number	Note
①	Power Cord Connection and Power Switch
②	Touchscreen
③	Specimen Mounting Position

Figure 3-1

4. Introduction to the Touchscreen Program

4.1 Initial Screen

See Figure 4-1.

Number	Note
①	Display current force, displacement, deformation, and maximum force
②	If necessary, enter the sample information.
③	Test Plan Setup
④	Display Settings: You can set the units for force values.
⑤	Curve Display Area
⑥	Up/Down buttons: Manually adjust the size of the specimen mounting position based on the sample size.
⑦	Click to clear the current test data
⑧	Click to return the ram to its initial position
⑨	Stop Test Button, Start Test Button

Figure 4-1

4.2 Test Plan Interface

See Figure 4-2.

Number	Note
①	To test the speed, you can use the default value.
②	Break-induced shutdown: The machine automatically shuts down when the break reaches a set percentage. Optional feature
③	Test Type: The standard accessories included with this unit are intended for compression testing only. Please select “Compression.”
④	Start deformation calculation; calculation begins once the actual force reaches a specified percentage of the set force value. Optional setting
⑤	Shutdown conditions, optional pressure values. Optional settings
⑥	Start the crush test; once the actual force reaches a certain percentage of the set force, begin calculating the fracture ratio. Optional setting
⑦	Force Settings

Figure 4-2

4.3 Force Value Settings Screen

See Figure 4-3.

Number	Note
①	Set the required force value
②	Set the pressure duration
③	Speed reduction settings: When the pressure reaches a set percentage, the speed slows down. Use the default values.
④	Pressure-activated timing start setting: Timing begins when the actual pressure reaches 100% of the set pressure value.

Figure 4-3

5. Compression Test Procedure

5.1 Sample Preparation and Placement

Select a specimen of an electrical enclosure that is free of initial cracks, plastic deformation, and in perfect condition. Based on the specimen dimensions and in accordance with Section 4.1, use the up/down keys to adjust the platen to a position slightly higher than the specimen’s height, and place the specimen in the specimen mounting position as described in Chapter 3.

5.2 Test Parameter Settings

Set the compression force and duration in accordance with Section 4.3 and the relevant provisions of the standards.

Clause 15.3 of GB/T 17466.1-2019 (IEC 60670-1:2021 Clause 15.2) requires a force of 500 N applied for 1 minute; GB/T 17466.1-2019, Clause 15.5 (IEC 60670-1:2021, Clause 15.5) requires a force of 50 N/cm² (not exceeding 1000 N) to be applied through 9 mm thick plywood, with a duration of 1 minute.

5.3 Starting the Compression Test

Number	Note
①	Click the “Start Test” button to begin the test
②	Move the press block slowly toward the specimen and apply pressure.
③	When the actual pressure reaches the set value, the timer starts.
④	Once the force application time reaches the set duration, the test stops automatically and the load block returns to its original position.

Note: If the actual pressure does not reach the set value, or if the specimen breaks during the compression process, you may click “Stop Test” to manually terminate the test.

5.4 Interpretation of Test Results

After the test is completed, the mounting box and housing must not exhibit any deformation or damage that would affect continued use; if this is the case, the test is considered passed.

6. Daily Maintenance and Care of Equipment

6.1 Routine Maintenance

After each test, clean up any dust or debris from the specimen mounting area to keep the work surface clean and free of debris; wipe down the equipment surface to keep it clean; verify that the clamping block is secure and that the limit stops are not misaligned; apply specialized lubricant to the drive screw to ensure smooth operation.

6.2 Storage Specifications

6.2.1 Storage Environment Requirements

Temperature: 5°C to 35°C; relative humidity: ≤65% RH; dry, dust-free environment free of corrosive gases.

6.2.2 Long-Term Storage Operations

Turn off the power and unplug all cables; clean the equipment and wrap it in dust-proof film; turn on the power for 30 minutes each month to prevent moisture damage to the components.

6.3 Calibration Interval Requirements

To ensure the measurement accuracy and operational reliability of the equipment, it is recommended that it be sent periodically to a qualified third-party metrology laboratory for calibration. The recommended calibration interval is 12 months. The specific calibration interval may be determined by the user based on frequency of use, environmental conditions, and quality system requirements.

7. Troubleshooting and Resolving Common Problems

Fault Symptoms	Possible Causes	Procedure
The fixture does not raise or lower	Limit Switch Triggered	Check and adjust the limit switches
Force and displacement values are displayed incorrectly	Not reset to zero	Click to reset and try again
The machine stops as soon as the specimen is subjected to a load	Parameter Configuration Error	See Section 4.2; do not set unnecessary parameters arbitrarily.