EGAmaster EGATRONIK 51250 Інструкція з експлуатації Посібник з експлуатації - Сторінка 18
Переглянути онлайн або завантажити pdf Інструкція з експлуатації Посібник з експлуатації для Випробувальне обладнання EGAmaster EGATRONIK 51250. EGAmaster EGATRONIK 51250 20 сторінок. Earth ground tester
Друкувати сторінкуC: 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
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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)