MEGABRAS MTD-20KWe, Руководство пользователя

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If a number 1 appears in the most significant digit position, this means
that the measured value is higher than the highest one of the selected
range (Overrange). In this case, the immediately higher range must be
selected until finding a valid reading value (this will not be possible if
the measured resistance is higher than 20 k
Ω
).
2.9. Spurious voltages measurement
1. In order to check the existence and to measure the spurious voltages
present in the soil, the inserted rods must be kept in place, connected
to the equipment as shown in figure 01.
2. Select the V position with the FUNCTION Selector Switch
(
and
press the START Push-button
'
. The display will show the AC
voltage between the grounding E1 and the E2 probe, up to 200 V.
2.10. Soil resistivity measurement - Wenner Method
1. Insert four rods (spikes) in the soil, well aligned and with a constant D
separation, as shown in fig. 02. When performing this measurement,
the distance between the rods is critical as it takes part in the
resistance calculation.
2. Select the position
ρ
(4 pole) in the FUNCTION Selector Switch
(
and connect the rods, as it is shown in figure 02.
fig. 02
D
H(E )
C
S(E )
T
ES(E )
XT
E(E )
XC
D D