UT521 USERS MANUAL
7
3.3
Measure methods:
(1) Earth Voltage Testing:average respond
(2) Earth Resistance Testing : testing signal frequency : around 820Hz,current :
20 position around 3.2mA
3.4
Maximum operating accuracy:
Maximum operating accuracy within measure range:( 30%)
20 : 5.00 ~20.00
200 : 20.0 ~200.0
2000 : 200 ~2000
3.5
Working condition:
Temperature:5 ~40
Relative humidity: 80%RH(no fog)
Height above Sea Level: 2000 meters
3.6
Storage condition:
Temperature:-20 ~60
Relative humidity: 75%RH(no fog)
