HGT1 User Manual
40 OMICRON
10.Place the ground rod at the distance from the grounding system you want to start the measurement
from. In the present example this would be 1 m.
11.Press the I/O button on the front panel of the CPC 100 to start the first injection cycle.
12.Start the measurement in PTM section Measurement.
13.After the measurement is finished, move to the next location (for example 2 m) and start the next
injection cycle and take measurements in PTM section Measurement.
14.Repeat the previous step until the ground impedance is not changing anymore and the flat part of the
profile is reached.
According to EN 50522, the step and touch voltage measurement can be skipped if the ground potential
rise is smaller than the permissible touch voltage multiplied by two. This value is also indicated in the
template, as shown above. IEEE 80 does not mention any limit for ground potential rise or ground
impedance.
CAUTION
Minor or moderate injury caused by tripping on the measurement cable possible
► If the measurement cable crosses obstacles like roads or walkways, make sure to warn
approaching persons about the cable to prevent accidents caused by tripping.
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