Spurious Voltages Measurement; Soil Resistivity Measurement - Wenner Method - TENTECH MTD 20KWe Manual De Uso

2. Select the R(3 pole) position in the FUNCTION Selector Switch.
Select the 20 kΩ range with the RANGE Selector Switch and
press the START Pushbutton. If the resistance value is lower
than 2 kΩ, select the most adequate, electing the scale from the
highest to the lower. If the acoustic alarm bips, this indicates some
abnormality in the rods wiring, the reason may be a misconnection or
an excessively high diffusion resistance in the current rod. Check the
installation to fix this problem. (See item 5).
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 kΩ).

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.
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