What is the maximum interval for testing a device that is inaccessible due to excessive height?

The maximum interval for testing a device that is inaccessible due to excessive height is typically set at 18 months. This guideline is established to ensure that while regular testing and maintenance are essential for operational reliability and safety, it also recognizes the practical challenges involved in accessing devices that may be installed at high or difficult locations.

The rationale behind the 18-month interval strikes a balance between safety protocols and the feasibility of periodic testing. Regular testing is crucial for maintaining the integrity and functionality of safety systems, but it also must consider the logistical challenges associated with accessing these high-up devices. Allowing an 18-month period acknowledges that while regular checks are required, some systems may not be easily reachable, and this time frame provides an adequate window for the necessary maintenance without compromising safety.

Longer intervals, such as 24 or 36 months, may not provide sufficient oversight to detect potential issues that could arise in the operation of the device, while shorter intervals, like 12 months, may impose unnecessary challenges if safe access is not assured. Thus, the 18-month interval is a recognized and practical solution within industry standards.