Uni-Trend UT521 Specifications download pdf (Page 7)

UT521 USERS MANUAL

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)

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Uni-Trend UT521 Specifications Page 7