7 Testing and Maintenance
62
The following symbols are used in the diagrams illustrating the safety tests:
CAUTION
After each service, maintenance, or repair event:
Ensure all fuses accessible from the outside comply with the manufacturer’s specification.
Check:
• the integrity of mechanical parts, internally and externally.
• any damage or contamination, internally and externally.
• that no loose parts or foreign bodies remain in the device after servicing or repair.
• the integrity of all relevant accessories.
Hints for Correct Performance of Safety Tests
• Perform a visual inspection on all detachable power cords used with the monitoring system, and
include these in all safety test procedures.
• Connection lines such as data lines or functional earth conductors may appear to act like protective
earth connections. These may lead to incorrect measurements and need to be considered during
testing. If necessary, unplug these connections.
• Position all cables and cords in such a manner that they do not influence the safety tests.
• Measurement of insulation resistance is not required.
Supply mains Resistance measuring device
L, N Supply mains terminals PE Protective earth terminal
Mains part Applied part
F-type applied part Measuring device
......... Optional connection Connection to accessible
parts
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