HT instruments HT7051 - Manual (Page 23)

HT2055
EN - 22
5 Use
or keys and select the EARTH RE measurement on the station unit. The
following screen is displayed:
Fig. 25: Main screen of earth resistance measurement
6 Press
TEST
key to perform the measurement. The result is displayed
Fig. 26: Result screen of earth resistance measurement
Where:
R  Measured value of earth resistance
Rp  Voltage probe resistance (S)
Rc  Current probe resistance (H)
CAUTION
 When starting test the unit performs a preliminary check of the resistance
values for current probe (Rc) and voltage probe (Rp) stopping the test if
these values are assumed to be too high and giving the following
messages “Rc: >2.0k
” and “Rp: >2.0k”. Decrease the value of these
resistance wetting the ground close to the probes and/or connect more
probes in parallel
 High noise currents and voltages on earth could affect the measurement
results. In this case the tester displays the ”NOISE” warning
7 Press
MEM key to save the result inside memory (see § 8.1)
CAUTION
To view stored earth resistance results on PC they must be downloaded to the
meter unit first. To download the results select earth results from Synchronize
menu (see § 5.1.3). After the results are downloaded the stored data in
the station unit will be automatically deleted