Uni-Trend UT521 Spécifications télécharger pdf (Page 13)

UT521 USERS MANUAL

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 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.

c. Earth Resistance Testing:Select function OFF to EARTH RESISTANCE 2000

(Maximum),press"TEST"button, LCD display will show earth resistance value. If

the resistance value <200 ,then select function from OFF to earth resistance

200 ,LCD display will show earth resistance value. If the resistance value

<20 ,then select function from OFF to earth resistance 20 ,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.

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Uni-Trend UT521 Spécifications Page 13