Stop time measurement
Whether or not a technical protective device offers enough pro-
tection against a dangerous movement depends entirely on the
minimum distance selected. It is necessary to ensure that the dan-
gerous movement comes to a stop before reaching the hazardous
point throughout the entire life cycle of the machine.
The stop time measurement on machines is required before the ini-
tial commissioning, after significant changes or expected changes
due to usage, such as brake wear.
The stop time measurement from SICK determines the time
between the triggering of a stop signal and the stopping of the dan-
gerous machine movement. The measurement results serve as the
basis for determining the minimum distances in accordance with
ISO 13855 Annex D. Corresponding measures can be implemented
in a timely fashion if required.
Regularly calibrated measuring instruments ensure a consistently
high level of testing quality.
Stop time measurement
INSPECTING AND DETERMINING THE MINIMUM DISTANCE
Verication and optimization
www.sick.com/stop_time_measurement
Stop time measurement
Components of the SICK stop time measurement
Performing the stop time measurement in accordance with the specications laid out by ISO IEC 17020 with periodic measuring instruments
tested in accordance with ISO 17025
Observing national machine-specic standard specications (e.g. for older machines)
Calculating the required minimum distance between the hazardous point and the technical protective device according to EN ISO 13855
Preparation and handover of a measurement protocol, retention period: 30 years
Range of services
Your benets
• Identifying risks in the case of non-compliance with required
minimum distances
• Guaranteed measurement quality using calibrated measur-
ing instruments
• Early detection of machine and manufacturing line wear
• High testing quality through certication and periodic
inspection conducted by the inspection body according to
ISO IEC 17020 and on-going competency management
• Generation of a measurement report for the machine docu-
mentation
Related services
• Initial inspection
• Periodic inspection
Prerequisites
Prerequisites for the SICK stop time measurement
Protocol for the last stop time measurement conducted (if available)
Operational machinery including tools with installed and functioning protective devices
Experienced operator or maintenance technician to operate the machine in all operating modes
8021233/2017-11-10 • IFLX/ITL (2018-01) • Subject to change without notice
SICK AG | Waldkirch | Germany | www.sick.com
Our expertise
Do you export or utilize machinery worldwide? Then we have
the expertise to ensure your compliance with legal require-
ments all over the world. Our more than 150 functional safety
experts in over 80 countries are nearby for you and your proj-
ects. We are available on-site to support you with our expertise
in functional safety.
Our tailored, custom-built solutions, safety systems and ser-
vices are underpinned by the years of experience we have ac-
quired installing countless machines and plants – and they are
ready for the requirements that the future will bring. This allows
us to constantly increase the level of integration between safety
and productivity.
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