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UT521 USERS MANUAL1ContentChapter Page25691011181. Safety Instructions2. Characteristics3. General Specifications4. Product outlook & accessories5

UT521 USERS MANUAL10Battery sign Battery Voltage 8.2V7.8V~8.2V7.4V~7.8V7.0V~7.4V 7V5.2 Test leads connection Make sure al

UT521 USERS MANUAL116. Measure method WarningWhen the Tester carry out earth resistance testing, the distancebetween E and C have the maximum v

UT521 USERS MANUAL12figure2C: auxiliary electrode P: potential electrode E: earth electrodeAuxiliaryEarth SpikesEarthed ElectrodeUnder TestRed

UT521 USERS MANUAL13b. Earth Voltage Testing:Select function OFF to EARTH VOLTAGE, LCD display will show voltage, connect test leads in V and E

UT521 USERS MANUAL14press"TEST"button, the button's light will be on, which shows the Tester is inmeasurement.(Note:when C or E does no

UT521 USERS MANUAL15f. Hold function:while testing, press slightly"Hold/Save"button,save data function will be on, the corresponding t

UT521 USERS MANUAL166.2 Simple measurement(use simple 2-Wires test leads for measurement): This method will be used when the auxiliary earth st

UT521 USERS MANUAL17When using this method, P and C have already connected together.DangerWhen using commercial electricity power systemís grounding p

UT521 USERS MANUAL187. Maintenance & Repair7.1 Maintenance7.1.1 Replacing battery and repair(please see figure 4) After low battery indicatorshow,

UT521 USERS MANUAL19 a. switch-off the Tester and remove all the test leads. b. release the screw in bottom part,and open battery compartment.

UT521 USERS MANUAL21.Safety InstructionsThis operation manual includes the user guidance and safety instruction when using the tester, please read it

UT521 USERS MANUAL20This operating manual is subject to change without notice.

UT521 USERS MANUAL21

UT521 USERS MANUAL3Danger identifies conditions and actions that most likely pose hazard(s) or die.Warning identifies conditi

UT521 USERS MANUAL4 Warning Do not use the Tester if it is damaged or metal part is exposed. Do not disassemble the tester un-intentionall

UT521 USERS MANUAL52.CharacteristicsThe Tester is using micro controller with high accuracy and reliability; it can measureevery electric wire, electr

UT521 USERS MANUAL63.General Specifications3.1 Operating temperature and Relative humidity(20 5 & 75%RH):3.2 Application standard: I

UT521 USERS MANUAL73.3 Measure methods: (1) Earth Voltage Testing:average respond (2) Earth Resistance Testing : testing signal frequency

UT521 USERS MANUAL83.7 Power source:[1.5V Alkaline Battery (AA)*6]3.8 Overload protection: Earth Resistance:200 Vac (10 seconds) E

UT521 USERS MANUAL94. Product outlook & accessories:(figure 1)figure 1LCD DisplayLIGHT/LOAD buttonHOLD/SAVE buttonTEST buttonON/OFF functionInput