EGAmaster EGATRONIK 51250 Manuale di istruzioni per l'uso - Pagina 18

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C: auxiliary electrode

P: potential electrode

E: earth electrode

b. Earth Voltage Testing: Select function OFF to EARTH VOLTAGE, LCD display will show

voltage, connect test leads in V and E, then connect to the testing point, LCD display will show

earth voltage value (Attention: measure earth voltage does not need to press TEST button). If the

measuring value>10V, then it need to switch-off all the related voltage equipment. Wait until

the earth voltage decrease, and then do it again. Otherwise, it will affect the accuracy of earth

resistance.

Warning!

Earth Resistance Testing:Select function OFF to EARTH RESISTANCE 2000Ω (Maximum), press

"TEST"button, LCD display will show earth resistance value. If the resistance value <200Ω ,then

select function from OFF to earth resistance 200Ω, LCD display will show earth resistance value.

If the resistance value <20Ω, then select function from OFF to earth resistance 20Ω, LCD display

will show earth resistance value; Of course, you can follow the other selecting order for testing.

In summary, you need to select the best measurement position to measure for getting the best

accuracy.

Press "TEST" button, the button's light will be on, which shows the Tester is in measurement.

(Note: when C or E does not connect properly, auxiliary earth resistance or earth resistance

excess the load (like 20Ω excess around 14KΩ),or testing terminal open circuit, LCD display will

show "- - - - Ω", then it need to double check the connection parts, whether soil is too dry, whether

auxiliary earth stakes is close to earth.)

When the earth resistance testing point over the selected measuring range, meanwhile the

selected 20Ω position less than around 14KΩ, or 200Ω position less than around 26KΩ, or 2000Ω

position less than around 78KΩ, LCD display will show "OL" (overload). Warning: If the auxiliary

Earth voltage testing only work in V and E, C and P connecting cable must be

separated. Otherwise, it will cause danger and damage the Tester.

(figure 2)