In the world of industrial cooling, scroll air-cooled chillers are spearheading an energy-efficiency revolution. Among them, the newly launched 800kW chiller by H.Stars Group has quickly become a topic of industry discussion. But what qualifies as a “large-scale” unit in this field? Let’s decode the standards of industrial chiller classification from a technical perspective.

1. Understanding Chiller Size Classifications

In the HVAC industry, the size of a chiller is defined by more than just its physical footprint. According to ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers), scroll air-cooled chillers can be categorized by cooling capacity as follows (for reference):
• Small Units: <200kW
• Medium Units: 200–500kW
• Large Units: >500kW
This classification considers system integration, efficiency curves, and actual application environments—not just output power.
International giants like Trane and Carrier follow similar sizing logic. 500kW often marks the dividing line between commercial and industrial systems. Units above this threshold typically feature multiple compressors, subcooling technology, and advanced industrial-grade designs—with COP (Coefficient of Performance) values exceeding 3.8 and meeting China's GB19577-2015 first-level energy efficiency standard.

2. Where Does the 800kW Unit Stand?

H.Stars’ 800kW scroll chiller features a dual-rotor variable frequency compressor system and sits firmly in the upper tier of industrial cooling. Compared to conventional 500kW models, it reduces metal consumption per kilowatt of cooling by 18% and boosts its IPLV (Integrated Part Load Value) to 4.2. This translates to an annual power saving of approximately 120,000 kWh based on 3,000 operating hours per year.
In field testing at a cold chain logistics center, the unit maintained full-capacity operation even in harsh 45°C ambient conditions—demonstrating excellent environmental adaptability.

3. Compact Design Meets High Power

Compared with McQuay’s MWC 650kW chiller (5.2m² footprint), the H.Stars 800kW unit achieves higher capacity while maintaining a smaller footprint (4.8m²). This compact modular design simplifies transportation and installation.
Its smart multi-unit control system supports parallel operation of up to 8 units, enabling a combined capacity of up to 6400kW. This makes it a perfect fit for large-scale data centers, chemical processing plants, and industrial manufacturing facilities.

4. Market Trends: Big Units, Bigger Opportunities

With the rise of China’s “New Infrastructure” initiative, demand for high-capacity chillers is surging. As of 2022, chillers over 500kW now account for 38% of the market—up from just 23% five years ago.
These systems are essential in semiconductor fabs and battery manufacturing lines. For instance, after a major lithium battery producer adopted the H.Stars 800kW chiller, their cooling energy consumption dropped by 31%, while product yield increased by 2.7%.

5. Smart Cooling for Industry 4.0

To meet the demands of intelligent manufacturing, H.Stars integrates IoT-based remote monitoring into its chillers. Each unit tracks 132 real-time operational parameters. Combined with machine learning algorithms, the system optimizes energy use dynamically, transforming the 800kW chiller from a mere cooling unit into a critical node in the industrial IoT ecosystem.
As Industry 4.0 accelerates, the emergence of H.Stars’ 800kW scroll chiller redefines what a large-scale cooling solution looks like. It's more than a machine—it's a symbol of China’s rising capability in precision industrial refrigeration, and a gateway to a smarter, more efficient future.
When cooling capacity crosses new thresholds, what follows is not just power—but an entire shift in the energy efficiency paradigm.

The moisture permeability tester is a professional device used to measure the water vapor transmission rate (WVTR) of textiles, films, non-woven fabrics and other materials. The following are the standard operating procedures and technical points.

I. Equipment structure and principle

Core components

1. Test chamber: sealed chamber with controllable temperature and humidity (usually divided into dry/wet chamber)

2. Weighing system: high-precision balance (0.001g resolution)

3. Temperature control system: PID precise temperature control (range 20-50℃±0.5℃)

4. Humidity system: saturated salt solution or steam generator

5. Data acquisition: automatic recording of mass changes and temperature and humidity

Test principle

Positive cup method (ISO 2528): water vapor permeation from wet chamber to dry chamber

Inverted cup method (ASTM E96): water vapor absorption from dry chamber to wet chamber

Dynamic method (JIS L1099): determination of water vapor carried by airflow

II. Standard operating procedures

1. Sample preparation

Cut a circular sample with a diameter of ≥70mm (no creases/breaks)

If testing multiple layers of materials, stack them according to the actual use direction

Pretreatment: equilibrate at the test temperature and humidity for 24h (GB/T 12704 requirements)

2. Equipment initialization

1. Turn on the constant temperature water bath (set to 23℃ or 38℃)

2. Prepare saturated salt solution:

Dry environment: Mg(NO₃)₂ (RH≈53%)

High humidity environment: K₂SO₄ (RH≈97%)

3. Calibrate the balance (use standard weights)

3. Sample loading and sealing

1. Fix the sample at the mouth of the test cup:

- Positive cup method: add distilled water (liquid surface 3mm away from the sample)

- Inverted cup method: add desiccant (anhydrous CaCl₂)

2. Press with silicone seal to ensure no side leakage

3. Weigh the initial mass (m₀) to an accuracy of 0.001g

4. Test execution

1. Place the test cup in a constant temperature and humidity chamber

2. Set parameters:

Temperature: 23±1℃ or 38±1℃ (select according to the standard)

Air flow rate: 0.5-1.0m/s (dynamic method needs to be set)

Test interval: 1h/time (static method)

3. Start the test, the system automatically records the mass change (m₁, m₂...mₙ)

5. Data processing

Water vapor permeability meter:

WVTR = (Δm×24)/(A×t) Unit: g/(m²·d)

Δm: mass change (g)

A: effective test area (m²)

t: test time (h)

Example:

If the mass decreases by 0.12g within 24h and the test area is 0.00283m², then:

WVTR = (0.12×24)/0.00283 = 1017.7 g/(m²·d)

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The fabric air permeability tester is an instrument specially used to measure the air permeability of fabrics (such as clothing, footwear, industrial textiles, etc.). Its core purpose is to evaluate the ability of materials to allow air to pass under different pressure difference conditions. The following are its main application scenarios and purposes:

1. Quality control and production optimization

Production process verification: Ensure that the air permeability of fabrics during the production process (such as textile, coating, lamination, etc.) meets the design standards to avoid performance degradation due to process deviations.

Batch consistency detection: Compare different batches of raw materials or finished products to maintain the stability of product air permeability.

2. Functional clothing and equipment development

Sports/outdoor clothing: Test the air permeability of products such as assault jackets and mountaineering clothes, and balance the needs of windproof and moisture removal (such as the research and development of fabrics such as GORE-TEX).

Protective equipment: Evaluate the air permeability of medical protective clothing and industrial dustproof clothing to ensure the protective effect while avoiding stuffiness.

Shoe materials and tents: Optimize the air permeability of upper materials or tent fabrics to improve wearing comfort or ventilation performance.

3. Industry standards and certification

Compliance testing: meet international standards (such as ISO 9237, ASTM D737, GB/T 5453, etc.) and obtain product certification (such as CE, OEKO-TEX).

R&D benchmarking: compare competitor or industry benchmark data to guide new product development.

4. Material research and innovation

Evaluation of new materials: test the air permeability efficiency of innovative materials such as nanofibers and breathable membranes to promote technology applications.

Analysis of multi-layer composite materials: study the impact of different laminate structures (such as non-woven fabrics + films) on overall air permeability.

5. User experience and market competitiveness

Comfort quantification: convert air permeability data (such as mm/s or cfm) into product selling points (such as "air permeability increased by 20%)" to enhance market persuasiveness.

Problem diagnosis: for the "stuffy" problem complained by users, locate material or design defects through testing.

Brief description of test principle

The instrument applies a controllable air pressure difference on both sides of a fixed area of fabric to measure the volume of air (or flow rate) passing through per unit time. The results are usually expressed as air permeability (such as L/m²/s) or air permeability resistance, with higher values indicating greater air permeability.

Key parameters for selecting a tester

Test standard compatibility (such as support for multiple international standards)

Range and accuracy (adapting to different materials from dense down-proof fabrics to sparse mesh fabrics)

Automation functions (such as digital pressure regulation, direct data export)

This type of instrument is indispensable in textile laboratories, quality inspection agencies and R&D centers, and directly affects the functional positioning and market acceptance of products.

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High temperature environment can affect the efficiency and accuracy of stepper motors, which may lead to step loss.

1、 Working principle of stepper motor

A stepper motor is a type of motor that converts electrical pulse signals into rotational angle outputs. Each time a pulse signal is received, the stepper motor rotates a fixed angle, usually 1.8 or 0.9 degrees. Therefore, stepper motors can accurately control the rotation angle and speed, and are often used in mechanical equipment that requires precise control.

2、 The impact of high temperature environment on stepper motors

High temperature environments can have a negative impact on the operation of stepper motors. Firstly, high temperatures can cause the temperature of the coils inside the motor to rise, thereby increasing resistance and affecting motor performance. Secondly, the aerodynamic performance in high-temperature environments is poor, which can reduce the cooling efficiency of the motor. Finally, high temperature may also cause expansion and deformation of motor materials, intensify friction, and affect the accuracy and efficiency of the motor.

3、 Step loss problem of stepper motor in high temperature environment

In high temperature environments, the problem of step loss in stepper motors is quite serious. When the temperature of the motor increases, the resistance of the coil will increase, which will cause a decrease in current and affect the rotation of the motor. In addition, high temperature environments can weaken the cooling efficiency of the motor, further exacerbating the problem of step loss. Therefore, to ensure the stability and accuracy of the stepper motor, special protection and control are required in high-temperature environments.

4、 How to solve the problem of step loss in stepper motors under high temperature environment

To solve the problem of step loss of stepper motors in high temperature environments, we can start from the following aspects:

1. Use high temperature resistant materials: Choosing high temperature resistant materials can reduce the high temperature impact on the motor.

2. Regular motor inspection: Regularly check the temperature and condition of the motor to promptly identify and solve problems.

3. Strengthen cooling measures: Increase cooling measures for the motor, such as adding heat sinks, installing fans, and reducing motor workload.

4. Use temperature sensors: Install temperature sensors to monitor the motor temperature in a timely manner, and issue alarms and handle issues promptly when the temperature is too high.

High temperature environment can have a certain degree of impact on the efficiency and accuracy of stepper motors, and even cause step loss problems. To ensure the stability and accuracy of the stepper motor, it is best to use high temperature resistant stepper motor

Ctrl-Motor is the overseas business office established in Shenzhen by DDON （Chengdu, headquartered in Sichuan, China. The company has a team of nearly 100 senior engineers, specializing in the production of special motors ranging from deep low temperature of - 196°C to ultra - high temperature of +300°C and extreme environments.

 

Laundry pods counting packaging solution

With the rapid development of household cleaning products market, laundry pods as a new type of washing products are widely welcomed because of their convenient use, accurate dosage and environmental protection characteristics. However, in the high-speed production line, the packaging counting of laundry pods faces many challenges.

The VX series vision counting machine plays an important role in the laundry pods counting and packaging production line. The following is a case of a well-known daily chemical enterprise customer. As shown in the following video,  VX8-3 vision counting machine is demonstrated.

Solution
The elevator is equipped with an 8-channel design to meet customer production requirements, such as 15 per pack/box, the speed can reach 40-50 per pack/box per minute,
At the same time, the channel combination counting can be used to achieve more quantity counting packaging, such as 40 per pack/box, and the speed can reach 15-25 per pack/box per minute.


Advantage for VX8-3 counting machine
1.Can count quickly and accurately.
2.Strong compatibility, whether single chamber, multi-chamber, can achieve counting.
3.The product information can be traced, and the whole set of equipment can be linked with the enterprise management system
4.Intelligent learning function to reduce parameter debugging time
5.Through the learning mode, the data of various falling postures of materials can be automatically obtained, and the accuracy of parameters can be checked through the verification mode. If there is an error, the parameters can be manually fine-tuned. A material only needs to be learned and verified once, and the next time it is used, it can be directly retrieved.

The counting machine can be paired with bag or box production line according to customer’s requirements.The following is a schematic diagram of the bagging and box production line.

The successful application of the VX8-3 vision counter in the laundry detergent industry not only addresses the of traditional counting methods but also provides a reliable solution for the intelligent upgrade of the daily chemical industry. As algorithms continue to optimize and hardware performance improves, vision counting technology will play a crucial role in more niche areas, driving the packaging industry towards greater efficiency and precision.

This article analyzes the system architecture and technical characteristics of rapid temperature change test chambers, by systematically studying the technical parameters and functional design of key components, it provides theoretical guidance for equipment selection and process optimization.

 

1.Technical Principles and System Architecture

Rapid temperature change test chambers operate based on thermodynamic transfer principles, achieving nonlinear temperature gradient variations through high-precision temperature control systems. Typical equipment can attain temperature change rates ≥15℃/min within a range of -70℃ to +150℃. The system comprises four core modules:

(1) Heat exchange system: Multi-stage cascade refrigeration structure

(2) Air circulation system: Adjustable vertical/horizontal airflow guidance

(3) Intelligent control system: Multivariable PID algorithm

(4) Safety protection system: Triple interlock protection mechanism

 

2.Analysis of Key Technical Features

2.1 Structural Design Optimization

The chamber adopts modular design with SUS304 stainless steel welding technology. A double-layer Low-E glass observation window achieves >98% thermal resistance. The CFD-optimized drainage channel design reduces steam condensation to <0.5 mL/h.

 

2.2 Intelligent Control System

Equipped with Japan-made YUDEN UMC1200 controller.

 

2.3 Refrigeration System Innovation

Incorporates French Tecumseh hermetic scroll compressors with R404A/R23 refrigerants.

 3.Safety and Reliability Design

3.1 Electrical Safety System

 

• Complies with IEC 61010-1 CLASS 3
•  
• Schneider Electric components with full-circuit isolation
•  
• Grounding resistance <0.1Ω
•  
• Overcurrent protection response <0.1s

 

3.2 Multi-level Protection

• Triple-channel PT100 temperature monitoring
• Dual pressure switches
• Dry-burn humidity protection
• Emergency pressure relief valve

 

4.Technological Applications

(1) Aerospace: Thermal-vacuum testing for satellite components

(2) New energy vehicles: Battery pack thermal shock tests

(3) Microelectronics: Chip package reliability verification

(4) Materials science: Composite interlayer thermal stress analysis

 

5.Technological Trends

(1) Multi-stress coupling tests: Temperature-vibration-humidity simulation

(2) Digital twin integration: Virtual system modeling

(3) AI-driven parameter optimization: Machine learning-based curve tuning

(4) Energy efficiency: 40%+ heat recovery rate

 

Conclusion: With increasing reliability requirements in advanced industries, future development will emphasize intelligent operation, high precision, and multidimensional environmental simulation. Subsequent research should focus on integrating equipment with product failure mechanism models to advance environmental testing from verification to predictive analysis.

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Amid the wave of the global energy revolution, ice thermal storage technology is emerging as a powerful enabler of smarter, more sustainable energy use. As a pioneer with decades of experience in the HVAC industry, H.Stars Group is at the forefront of integrating technological innovation with environmental responsibility—and ice storage is at the heart of this transformation.

At its core, ice thermal storage is a poetic reimagining of time and energy. H.Stars’ self-developed intelligent ice storage system operates by taking advantage of off-peak electricity rates during nighttime hours to produce ice, storing the cold energy in specialized tanks. During the day, when electricity costs spike and cooling demand surges, this "frozen energy" melts, delivering chilled water at 0°C to buildings for efficient air conditioning. This method of “shifting peaks and filling valleys” boosts energy utilization by more than 30% and allows HVAC systems to operate with symphonic balance and precision.

At H.Stars, we've gone beyond the basics—ice storage has evolved into a multi-faceted energy ecosystem that addresses diverse challenges with precision and innovation:

• Industrial Applications:

A glycol ice storage system customized for an automotive manufacturing facility maintains consistent cooling water temperature within ±0.5°C, boosting product yield by 12%.

• Commercial Buildings:

In a major commercial complex in Shanghai, our modular ice storage solution reduced air-conditioning season electricity costs by 40%, cutting carbon emissions by 800 tons annually.

• District Cooling:

In a smart park in Southern China, our distributed ice storage stations, integrated with photovoltaic power systems, optimize clean energy usage and reduce reliance on traditional energy sources.
These real-world cases reflect our transformation from a provider of energy-saving tools to a partner delivering end-to-end energy solutions. By incorporating dynamic load forecasting algorithms and intelligent control systems, H.Stars ensures that every cubic meter of ice releases exactly the cooling energy required—delivering truly on-demand performance.
With China’s dual carbon goals (“peak carbon” and “carbon neutrality”) gaining momentum, H.Stars is scaling up the impact of ice thermal storage across new frontiers:

• Energy Integration:

In a northern data center, our ice storage system works in tandem with waste heat recovery, creating a closed-loop tri-generation system (cooling-heating-power).

• Material Innovation:

Our research into phase-change ice storage materials is increasing cold energy density by 50%, while reducing equipment footprint by one-third.
And the future is even more promising: as ice storage intersects with emerging technologies like hydrogen energy and virtual power plants, it’s no longer just a component of HVAC—it’s becoming a key node in the smart city energy grid.
At H.Stars, we see ice storage not only as an engineering breakthrough, but as a testament to nature’s equilibrium. True innovation, we believe, should shine with technological brilliance while honoring ecological harmony. With ice thermal storage at the core, we continue building a more resilient, intelligent energy ecosystem—where every kilowatt contributes to a sustainable balance between technology and the environment.

Breathability is an important indicator for measuring the comfort of textiles, and is particularly suitable for quality control of products such as sportswear, outdoor equipment, and medical textiles. An air permeability tester can scientifically evaluate the ability of air to pass through fabrics to ensure that the product meets industry standards (such as ISO 9237, ASTM D737, etc.). This article will provide a detailed introduction to the use of an air permeability tester to help you obtain accurate and repeatable test data.

1. Equipment and preparation

(1) Composition of an air permeability tester

Test head: Fixed sample, usually with test holes of different diameters (such as 20cm², 38cm², etc.).

Airflow control system: Adjusts and measures air flow (unit: mm/s or cm³/cm²/s).

Pressure sensor: Detects the pressure difference on both sides of the sample (unit: Pa).

Display/software: Displays test data, and some devices support data export.

(2) Calibration and inspection

Calibration: Calibrate the equipment using a standard calibration plate according to the instructions to ensure accurate data.

Air tightness check: Test whether the airflow is stable when unloaded to avoid air leakage affecting the results.

Environmental conditions: It is recommended to test under standard temperature and humidity (such as 20±2℃, 65±4% RH) to avoid interference from environmental factors.

(3) Sample preparation

Cut at least 5 representative samples (such as 20cm×20cm), avoiding fabric edges or obvious defect areas.

If different parts are tested (such as the front chest and back of the garment), samples must be taken and marked separately.

2. Test steps

(1) Install the sample

1. Loosen the test head clamp and place the sample flat on the test area to avoid wrinkles or stretching.

2. Tighten the clamp evenly to ensure that the sample is fixed and there is no air leakage (you can check by lightly pressing the edge with your fingers).

(2) Set parameters

Test standard: Select the applicable standard (such as ISO 9237, GB/T 5453, etc.).

Test area: Select the test hole size according to the thickness of the sample (small holes for thin fabrics and large holes for thick fabrics).

Pressure difference setting: usually 100Pa or 125Pa, adjusted according to the standard requirements.

(3) Start the test

1. Start the equipment, the system will automatically apply a stable airflow and measure the air permeability.

2. After the value stabilizes (usually 10-30 seconds), record the data (unit: mm/s or L/m²/s).

(4) Repeat the test

Each sample should be tested at least 3 times, and the average value should be taken as the final result.

If the data difference is too large (>10%), it is necessary to check whether the sample is improperly fixed or the equipment is abnormal.

3. Data interpretation and reporting

(1) Common air permeability units

mm/s (millimeter/second): The speed of air flow passing through the fabric vertically.

L/m²/s (liter/square meter/second): The amount of air flow passing through a unit area per unit time.

cfm (cubic feet/minute): Used in some European and American standards.

Summary

Textile air permeability tester is an indispensable tool in research and development, quality inspection and trade. Correct use of equipment and standardized operating procedures can ensure the reliability and comparability of test data. Whether it is product development or acceptance inspection, scientific air permeability evaluation can provide strong support for quality control.

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I. Instrument introduction

The heat and sublimation fastness tester is a professional equipment used to determine the color stability of textiles under high temperature conditions. It mainly evaluates two properties:

1. Heat fastness: color change when the material contacts a high temperature surface

2. Sublimation fastness: color migration caused by the dye directly changing from solid to gas at high temperature

II. Preparation before testing

1. Sample preparation

Cut a sample with a size of 40mm×100mm

The sample needs to be balanced under standard atmospheric conditions (20±2℃, 65±2%RH) for 24 hours

Prepare multi-fiber adjacent fabrics or single-fiber adjacent fabrics of the same size

2. Instrument inspection

Confirm that the surface of the heating plate is clean and free of contamination

Check the accuracy of the temperature control system

Ensure that the pressure device is working properly

Calibrate the temperature sensor

III. Operation steps

Heat fastness test

1. Turn on the power and preheat the equipment to the set temperature (usually 180-210℃)

2. Lay the sample flat on the heating plate

3. Lower the pressure device and apply a standard pressure of (4±1) kPa

4. Start timing and keep contact for 30 seconds

5. Immediately raise the pressure device after the time is up and remove the sample

6. Cool the sample under standard atmospheric conditions

7. Use a gray sample card to assess the discoloration level

Sublimation fastness test

1. Overlap the sample with the front of the adjacent fabric

2. Place in a tester that has been preheated to the set temperature (temperature is selected according to the material type)

3. Apply standard pressure (4±1 kPa)

4. Keep for 30 seconds to 4 minutes (according to the test standard requirements)

5. Take out the sample and cool to room temperature

6. Assess the discoloration of the sample and the staining level of the adjacent fabric respectively

IV. Temperature selection reference

Polyester fabric: 180℃ or 210℃

Other synthetic fibers: adjusted according to the fiber melting point

Natural fibers: usually 150-180℃

V. Result evaluation

1. Use a standard gray sample card to assess:

Discoloration level (1-5, 5 is the best)

Staining level (1-5, 5 is the best)

2. Record the test conditions (temperature, time, pressure)

3. Take photos before and after the test

Related standards

ISO 105-X11: Textile color fastness test

AATCC 133: Heat color fastness

GB/T 8427: Textile color fastness test

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Usually includes the following steps. The specific operation may vary slightly depending on the equipment model. Please refer to the equipment manual:

Preparation

1. Check the equipment

① Confirm that all parts of the tensile machine (clamp, handle, dial, etc.) are intact.

② Ensure that the clamp is clean and free of oil or residue to avoid affecting the test results.

2. Calibrate the equipment (first use or regular calibration)

Adjust the pointer to zero according to the manual, or use a standard weight to verify the accuracy of the reading.

3. Prepare the sample

(1) Sew the button to be tested on the standard fabric (or keep the button on the original garment), ensuring that the seam is firm.

(2) Cut the fabric and leave enough area around the button (usually ≥5cm×5cm) for clamping.

Test steps

1. Fix the sample

Upper clamp: clamp the fabric (avoid the seam) and ensure that the fabric is flat and does not slide.

Lower clamp: Clamp the button (if it is a four-hole button, it needs to be fixed with a special clamp or hook).

Note: The direction of the clamp must be consistent with the force direction of the button (such as vertical or horizontal stretching).

2. Start the test

(1) Slowly turn the handle or pull the lever to apply tension at a constant speed (usually the speed recommended is 10-15cm/min).

(2) Observe the connection between the button and the fabric until the button falls off or the stitching breaks.

3. Record data

(1) Read the maximum tension value indicated by the pointer (usually in Newtons N or pounds-force lbf).

(2) Record the damage form when the button falls off (such as stitching breakage, button fragmentation, etc.).

Post-test operation

1. Reset the equipment

(1) Loosen the clamp, remove the sample, and return the handle of the tensile machine to its original position.

(2) Clean the thread or fabric fragments remaining in the clamp.

2. Data analysis

Compare the test results with industry standards (such as ASTM D4846, ISO 13935, etc.) to determine whether the button is qualified.

Precautions

Safe operation: Avoid rapid force or overload testing to prevent the fixture from breaking and injuring people.

Environmental conditions: It is recommended to test in a standard temperature and humidity environment (such as 23±2℃, 50±5%RH).

Multiple tests: It is recommended to test the same button 3-5 times and take the average value to improve accuracy.

Common problem handling

The pointer does not return to zero: Check whether the spring or lever is stuck, and contact the manufacturer for calibration if necessary.

Button slips: Replace the fixture or use an anti-slip pad to enhance the clamping force.

If more detailed guidance is required, please provide the equipment model or refer to the specific manual.

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