SAT (Site Acceptance Test): Safety and Efficiency

Site Acceptance Test (SAT) is a key stage in commissioning industrial systems and machinery. Conducted at the customer’s site, this process confirms that the equipment operates in accordance with previously defined specifications and is ready for use. The test is essential for verifying that all components function correctly under real operating conditions and comply with applicable safety standards and regulations.

What is SAT?

Site Acceptance Test involves the final testing of machinery or systems at the customer’s installation site. The purpose of SAT is to confirm that the equipment has been properly installed, configured, and is ready for operation. Before these tests are carried out, a Factory Acceptance Test (FAT) is usually performed at the manufacturer’s facility to ensure that the equipment meets the customer’s requirements.

Why is it important?

SAT allows the customer to verify that the equipment performs as required and is fully functional. This process is critical because it helps identify and correct any issues before the system is put into service. As a result, costly and time-consuming repairs can be avoided at a later stage.

Differences between SAT and FAT

The main difference between Site Acceptance Test (SAT) and Factory Acceptance Test (FAT) lies in where and when the tests are performed. FAT is carried out at the manufacturer’s facility before the equipment is delivered to the customer, whereas SAT takes place at the installation site after delivery and installation.

Procedure

Planning

Planning a SAT includes preparing the test environment, defining the test objectives, and selecting the test methods. It is also essential to establish the acceptance criteria and prepare the documentation.

Preparation

Preparation includes installing and configuring the system or machine to be tested. Initial functional and performance tests should also be carried out.

Execution

SAT typically includes several types of testing, such as performance, functionality, operability, and safety tests. All results are documented and assessed for compliance with the requirements.

Documentation

The results of SAT are documented and evaluated to determine whether all requirements have been met. If any issues are identified, corrective actions are taken and the test is repeated until compliance is achieved.

Acceptance

If the requirements are met, the system or machine is accepted by the customer. Otherwise, corrections are made and the test is carried out again.

Benefits of carrying out SAT

• Quality verification: The test confirms that requirements and specifications have been met.
• Early fault detection: SAT makes it possible to identify and correct issues at an early stage, helping to avoid costly repairs.
• Customer satisfaction: The test increases customer satisfaction by ensuring that the equipment meets their requirements.

Importance in industrial automation

SAT is an essential part of industrial automation because it confirms that all systems operate correctly under real operating conditions. These tests are particularly important for industrial robots and production lines, where even minor irregularities can lead to serious production problems.

Standards and regulations

SAT helps meet many standards and regulations, such as the Machinery Directive 2006/42/EC and the Machinery Regulation 2023/1230. As part of the tests, compliance with harmonized standards is also checked, along with whether the manufacturer has carried out a risk assessment in accordance with EN ISO 12100 (note: formally, the manufacturer does not have to present it, but is required to prepare it). An important element is also verification of the CE marking, which confirms that machinery complies with EU requirements.

Support from a design office and engineering outsourcing

Carrying out SAT often requires cooperation with a design office that oversees implementation. In some cases, engineering outsourcing is also necessary to ensure the right expertise for comprehensive acceptance testing.

Site Acceptance Test (SAT) is a key stage in the commissioning of industrial machines and systems, ensuring that the equipment operates in line with the customer’s requirements under actual operating conditions. With proper planning, preparation, execution, and documentation, the test helps identify and correct issues, thereby increasing customer satisfaction and improving the quality of the final product.

Additional aspects of SAT in an industrial context

• Production process automation: SAT plays a key role in verifying automated production lines and robotic workstations.
• CE certification of machinery: The test is the final stage of certification, where the completeness and compliance of all documents and markings are checked in the broader context of CE conformity assessment and certification.
• PLC programming and SCADA: SAT includes operator training for control systems and verification of safety functions.
• Machine safety and guards: As part of the tests, the correct installation of machine guards is verified and interlocking systems are tested.
• Structural strength calculations (FEA): Technical documentation and verification of the completeness of structural strength calculations are a key part of SAT.

Importance in project management

SAT is one of the milestones in project management and often determines acceptance of a production line or machine. Proper execution is critical to project success and to achieving all defined KPIs (key performance indicators). The test ensures that production lines and industrial robots meet all customer requirements and are ready for operation.

The importance of SAT in certification and compliance processes

SAT is an important element of certification processes, such as machinery conformity assessment and verification of the EC Declaration of Conformity. As part of the tests, it is checked whether the machines have the appropriate certificates and meet the requirements of the Machinery Directive 2006/42/EC and other regulations, such as the Low Voltage Directive or electromagnetic compatibility.

Importance in the context of safety and risk

As part of SAT, a workstation risk assessment related to the Use of Work Equipment Directive is also carried out to ensure that all potential hazards have been properly managed. It is also verified whether the machines have appropriate guards and service platforms that provide safe access to all serviceable parts.

The test also includes verification of compliance with ATEX requirements if the equipment is intended for operation in explosive atmospheres. It is important that all components have the appropriate certificates and documentation confirming their safety.

The importance of SAT in production optimization

SAT plays a key role in production process automation, making it possible to verify system efficiency and performance. As part of the tests, OEE (Overall Equipment Effectiveness) indicators are also checked, and SMED (Single-Minute Exchange of Dies) tests are carried out to optimize machine changeover time.

Importance in the context of design and technical documentation

Carrying out SAT requires close cooperation with the design office, which oversees implementation and verifies that all aspects of machine design have been completed correctly. Reviewing the technical documentation is a key part of the test, ensuring that all components comply with the technical requirements.

Support from an industrial automation integrator

SAT often requires the involvement of an industrial automation integrator, who is responsible for installing and configuring the automation systems. The test also includes training in the operation of SCADA and PLC systems, ensuring that the customer’s personnel are fully prepared to manage the new systems.

The importance of SAT for compliance with standards and regulations

Carrying out SAT is crucial for meeting the requirements of standards and regulations, such as the Low Voltage Directive and Electromagnetic Compatibility. As part of the test, it is verified that all components and systems comply with the relevant harmonized standards, which is essential for obtaining the CE mark.

Site Acceptance Test is a key stage in the commissioning of machines and industrial systems, ensuring that the equipment operates in line with customer requirements under real operating conditions. With proper planning, preparation, execution, and documentation, the test helps identify and correct issues, thereby increasing customer satisfaction and the quality of the final product. Carrying out tests with due care and in accordance with the guidelines is essential to ensure high quality and the safety of machines and systems in an industrial environment.