NOTICE
Users are advised that the nVent ERICO System
3000
Lightning Protection System
may not function to its full efficiency under ice or snow conditions or on chimneys or
stacks emitting gasses or pollutants. For advice on temperature or corrosion concerns,
please contact your local nVent ERICO Distributor.
When performing a
3
–pole ground
resistance test, it is essential that the probe
is placed outside the sphere of influence of
the ground electrode under test.
To test the accuracy of the results and to
ensure that the ground stakes are outside
the spheres of influence, reposition the inner
stake (probe)
1
meter in either direction and
take a fresh measurement.
If there is a significant change in the reading
(
30
%), you need to increase the distance
between the ground rod under test, the inner
stake (probe) and the outer stake (auxiliary
ground) until the measured values remain
fairly constant when repositioning the inner
stake (probe).
MAINTENANCE RECORD
Date of
Inspection
Lightning
Event Counter
Reading
Ground
Resistance
Readings
Check of
Maintenance
Points
1
to
11
Comments
Inspected
by
1
2
3
