Related Manuals for UNI-T UT521
Summary of Contents for UNI-T UT521
-
Page 1: Table Of Contents
UT521 USERS MANUAL Content Chapter Page 1. Safety Instructions 2. Characteristics 3. General Specifications 4. Product outlook & accessories 5. Preparation before measurement 6. Measurement Operation 7. Maintenance & Repair... -
Page 2: Safety Instructions
UT521 USERS MANUAL 1.Safety Instructions This operation manual includes the user guidance and safety instruction when using the tester, please read it before using. Before using the Tester, please read and understand the operating manual including the content. Keep the operating manual properly, and let it easy to get it for reference during the process of testing. - Page 3 UT521 USERS MANUAL Safety sign " "has 3 meaning in this manual, user has to pay attention to this sign" "for operation. Danger identifies conditions and actions that most likely pose hazard(s) or die. Warning identifies conditions and actions that will pose hazard(s) or die.
- Page 4 UT521 USERS MANUAL Warning Do not use the Tester if it is damaged or metal part is exposed. Do not disassemble the tester un-intentionally. If it needs repair, please contact our after-sales services or our agents. Do not change battery or open battery compartment when the Tester is wet. Soft cloth should be used to dry it first, and then carry on.
-
Page 5: Characteristics
UT521 USERS MANUAL 2.Characteristics The Tester is using micro controller with high accuracy and reliability; it can measure every electric wire, electric installation, anti-thunder equipmentís earth resistance value of those earth system. Also, it can carry earth voltage measurement. (Note: the Tester should not be used outdoor hazard environment, like raining, thunder etc.) -
Page 6: General Specifications
UT521 USERS MANUAL 3.General Specifications Operating temperature and Relative humidity(20 5 & 75%RH): Range Measure Range Best Accuracy Earth Voltage 0V~200V(50/60Hz) (1.0%+4) (2.0%+10) (20 position) 0.00 ~20.00 Earth (2.0%+3)(200 or 2000 position) ~200.0 Resistance (Auxiliary earth resistance 500 2000 ~2000 (accuracy 5%);earth voltage 10Vac) - Page 7 UT521 USERS MANUAL Measure methods: (1) Earth Voltage Testing:average respond (2) Earth Resistance Testing : testing signal frequency : around 820Hz,current : position around 3.2mA Maximum operating accuracy: Maximum operating accuracy within measure range:( 30%) : 5.00 ~20.00 200 : 20.0 ~200.0...
- Page 8 UT521 USERS MANUAL Power source:[1.5V Alkaline Battery (AA)*6] Overload protection: Earth Resistance:200 Vac (10 seconds) Earth Voltage:400 Vac (30 seconds) Insulation Resistance:The insulation impedance between measure circuit and housing is not less than 20M 3.10 Product size:160mmx70.5mmx100mm. 3.11 Product Weight:around 560g.
-
Page 9: Product Outlook & Accessories
UT521 USERS MANUAL 4. Product outlook & accessories:(figure 1) LCD Display LIGHT/LOAD button HOLD/SAVE button TEST button ON/OFF function Input terminals Standard 3-Wires test leads Simple 2-Wires test leads Auxiliary earth stakes figure 1... -
Page 10: Preparation Before Measurement
UT521 USERS MANUAL 5. Preparation before measurement Battery Voltage check: Select function from OFF to EARTH VOLTAGE or EARTH RESISTANCE, LCD Display will show battery indicator : " " which show lowest battery status, and need to change battery, otherwise the Tester cannot work properly. - Page 11 UT521 USERS MANUAL 6. Measure method Warning When the Tester carry out earth resistance testing, the distance between E and C have the maximum voltage around 50V volt. Do not touch the external part of test leads and auxiliary earth stake in order to avoid shock hazard.
- Page 12 UT521 USERS MANUAL Yellow Green Earthed Electrode Auxiliary Under Test Earth Spikes figure2 C: auxiliary electrode P: potential electrode E: earth electrode...
- 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).
- Page 14 UT521 USERS MANUAL 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 20 excess around 14K ),or testing terminal open circuit,LCD display will show"- - - -...
- Page 15 UT521 USERS MANUAL f. Hold function:while testing, press slightly"Hold/Save"button,save data function will be on, the corresponding testing value will be saved and LCD display the corresponding sign. Press slightly"Hold/Save"button again, then it will cancel this function. g. Storage function: 1.storage data press"Hold/Save"button for around 2 seconds. Storage function will be on and save the corresponding data.
- Page 16 UT521 USERS MANUAL 6.2 Simple measurement(use simple 2-Wires test leads for measurement): This method will be used when the auxiliary earth stake cannot be used. Use the expose earth resistance object from the ground as earth, like metal water bath, water pile, wire ground, building earth, also can use 2-wires test leads method (E and P&C terminals).Connection as figure 3:...
- Page 17 UT521 USERS MANUAL When using this method, P and C have already connected together. Danger When using commercial electricity power systemís grounding point as a reference testing point, please be careful for voltage pose a shock hazard...
-
Page 18: Maintenance & Repair
UT521 USERS MANUAL 7. Maintenance & Repair Maintenance 7.1.1 Replacing battery and repair(please see figure 4) After low battery indicator show, replacing battery immediately as follows: figure 4... - Page 19 UT521 USERS MANUAL a. switch-off the Tester and remove all the test leads. b. release the screw in bottom part,and open battery compartment. c. Replacing all old battery (6) with new battery. d. After replacing the battery, rejoin the battery compartment and firmly screw.
- Page 20 UT521 USERS MANUAL This operating manual is subject to change without notice.
- Page 21 UT521 USERS MANUAL...
Need help?
Do you have a question about the UT521 and is the answer not in the manual?
Questions and answers