Maintenance and testing
Test
116
Item No.: 099-004833-EWM01
7.3.7
Measurement of protective conductor resistance
Measure between the plug earthed contact and accessible live parts, e.g. casing screws.
During the measurement, the connection lead must be moved across the entire length, especially near
the casing and plug inlet points. This should uncover any interruptions in the protective conductor. All
conductive parts of the casing accessible from outside should also be tested to ensure a correct PE
connection for safety class I.
The resistance must not exceed a mains connection lead 0.3
Ω
up to 5m in length. For longer leads, the
permissible value increases by 0.1
Ω
per 7.5m of lead. The maximum permissible value is 1
Ω
.
7.3.8
Functional test of the welding machine
Safety devices, selector switches and command units (if fitted) and the entire machine or the entire
system for arc welding, must be functioning perfectly.
1. Main switch
2. Emergency stop devices
3. Voltage reducing device
4. Gas solenoid valve
5. Message and control lamps
7.3.9
Documentation of the test
The test report must contain:
• the designation of the tested welding equipment,
• the date of the test,
• the test results,
• the signature, name of technician and the relevant institution,
• the name of the test equipment.
A label with the date of the test must be affixed to the welding machine to show that the test has been
passed.
