Megger Limited
PWS / Nov 06
DET4TC/R Launch
15
Appendix A.
The following application guide can be downloaded from Megger.com
Application Guide
The NEW – DET4TC/R
With ICLAMP and VCLAMP
Options.
‘Clamp On’ Electrode Testing Methods
The “ART” of earth electrode testing
The testing of earth systems has relied for many years on the tried and tested “Fall of
Potential” and other related methods. These methods give reliable results, but can be
time consuming. To measure an individual electrode’s earth resistance requires the
disconnection of the electrode being tested from the rest of the earth system and any
connection to a building’s earth wiring. This can also involve downtime, or reduce the
degree of protection to the installation.
Now Megger has a solution to this problem in the form of
A.R.T.
, the
Attached Rod
Technique
.
When the earth tester injects a test current into an electrode which is still connected
to the system, current not only flows down the electrode under test, but back into the
building’s system, and down any other electrodes connected in parallel.
Megger’s new
DET4TC
together with the optional
ICLAMP
utilises
‘ART’
to allow the
instrument to measure only the current being injected into the electrode under test.
The instrument uses this current to calculate the resistance of the electrode under
test. No disconnection, no wasted time, no downtime, no irritation, no scraped
knuckles!
Megger has made an “ART” of testing
