Measurement Procedure And Results Of "Ρ" Mode - MARTINDALE VR2250 User Instruction Manual

6.5.2. Measurement procedure and results of " ρ " mode
ρ
measurement mode by means of the F1 key.
1. Select
2. Select the distance d between the earth rods by means the F3 and F4 keys.
3. Connect the 4 Red, Green, Yellow and Blue connectors of the single cables in the
corresponding input terminals of the instrument B1, B2, B3, B4.
Instrument connection for Earth resistivity measurement
4. Press the START key. The instrument starts the test.
START
STOP
At the end of the test
the instrument emits a
double sound signal
indicating that the
test is correctly
terminated and
displays the values
alongside.
"ρ" Working mode
5. The instrument will show automatically the average value of the Earth Resistivity
calculate over the tests performed. Press F2 to RESET this value and the number of
Test.
This result can be stored pressing the SAVE key twice (according to paragraph 9.1).
I1
B4
B1 B2 B3
Yellow
Green
Red
d d d
EARTH 05.06.01
1.77
Vd= 1V
Test:04
ρAVG=0.74Ω
ρ
DIST= 2m
↑
FUNC CLR
Page 52 of 131
Black
d
Earth Resistivity value
expressed in Ωm.
Ωm
Voltage value of electrical
noise
Number of test
Average Value of Earth
Resistivity calculated over the
Number of tests displayed.
↓
VR2250