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Related Manuals for UNI-T UT503PV
Summary of Contents for UNI-T UT503PV
- Page 1 UT503PV UT503PV Photovoltaic Insulation Resistance Tester User Manual...
- Page 2 UT503PV Preface Thank you for purchasing this brand new product. In order to use this product safely and correctly, please read this manual thoroughly, especially the Safety Instructions part. After reading this manual, it is recommended to keep the manual at an easily accessible place, preferably close to the device, for future reference.
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Page 3: Table Of Contents
UT503PV Contents 1. Overview ...................... 4 2. Accessories ....................5 3. Safety Information ..................5 4. Electrical Symbols ..................9 5. External Structure ..................9 6. Button Descriptions ..................10 7. LCD Display ....................11 8. Button Functions ..................12 9. -
Page 4: Overview
Bluetooth transmission, automatic discharge, high voltage warning, remote-controlled test lead operation, and more. UT503PV is commonly applied to test insulation resistance for various equipment such as photovoltaic panel, battery energy storage system, new energy vehicles, etc. -
Page 5: Accessories
UT503PV 19. Bluetooth App 20. Manual/Automatic backlight 21. Mute function 22. LCD high-definition segmented display 2. Accessories Please carefully check if any accessory below is missing or damaged. 1． User manual: 1 pc 2． Download guideline for general file (Language: English): 1 pc 3．... - Page 6 UT503PV accessory is damaged, please stop use and prevent inadvertent use. ● Do not alter the internal wiring of the Tester. ● Do not use or keep the Tester in environments with high temperature and high humidity. ● Never use the Tester in any environment with flammable and explosive substances or strong magnetic field.
- Page 7 UT503PV removed so as to perform testing on recessed conductors such as wall outlets. Take care not to lose the shields ● If the low battery symbol appears on the LCD, please replace the battery immediately to ensure measurement accuracy ●...
- Page 8 UT503PV ● If the Tester is equipped with replaceable fuse, please adhere to the following operating instructions: 1) Power off the Meter before replacing the fuse and disconnect the connected measured cable. 2) Use only fuse with specified type and current rating. Do not use wrong or repaired fuse or connect the fuse block, otherwise it may cause fire.
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Page 9: Electrical Symbols
UT503PV 4. Electrical Symbols High voltage! Risk of electric shock! Double insulated Direct current (DC) Alternating current (AC) Grounding Caution or warning Battery power Conform to European Union standards Do not place equipment and its accessories in the trash. Please dispose properly according to the local regulation. -
Page 10: Button Descriptions
UT503PV Opening of flap cover of protective cover USB: Type-C USB data transmission port EARTH: High resistance measurement terminal (single-ended black lead) LINE: High voltage output terminal (remote-controlled test lead) LCD segmented display Functional buttons Alligator clips Lantern-tip test probe... -
Page 11: Lcd Display
UT503PV 7. LCD Display Battery power Battery charging(Reverse) Data hold Marking of the direction of terminal voltage in resistance measurement mode Over-range terminal voltage in resistance measurement mode Backlight Bluetooth communication USB communication External energized voltage Analog bar graph for insulation resistance test... -
Page 12: Button Functions
UT503PV Save data Comparative test of insulation resistance is FAIL Comparative test of insulation resistance is PASS Zero adjustment in low resistance measurement Auto power off Photovoltaic insulation resistance measurement 8. Button Functions ● Power button Long press this button for >2 sec to power on the Tester (with all segments displayed on the LCD for a second), long press again to power off the Tester. - Page 13 UT503PV measurement state and without high voltage output, press this button to select a higher rated voltage output. b. When READ is in operation (that is, when data is read), press this button to select previous set of data. c. For time setting, press this button to increase time.
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Page 14: Operating Instructions
UT503PV resistance c. In insulation resistance measurement mode, long press this button for >2 sec to cyclically select “TIME” mode, “COMP” mode, and continuous mode. ● OK button To adjust parameters in non-measurement state, please short press the OK button to confirm that the setting is valid and to exit the present setting. - Page 15 UT503PV ≤7.2V (Blink 10 sec at 2 Hz and then power off) Battery symbol Battery voltage (Level 0) 7.3~7.7V (1 Hz Blink) (Level 1) 7.8~8.2V (Level 2) 8.3~8.7V (Level 3) >8.8V (Level 4) (3) If the test lead is damaged, broken, streaked or cracked, please stop use and contact the distributor or purchase new test leads from nearby franchised stores.
- Page 16 UT503PV Figure 9.3 Battery installation Note: To avoid electric shock, please power off the Tester and disconnect all test leads before replacing the batteries. 9.3 Basic measurement operations 9.3.1 Conventional insulation resistance measurement Warning: Please wear insulated gloves (corresponding to measurement category) and take protective measures before making connection and measurement.
- Page 17 UT503PV Note: After boot-up, the backlight is turned on and the APO function is enabled by default. See the instructions about backlight and APO functions. Figure 9.5 Continuous resistance measurement by default after boot-up Press the TEST button to perform test, then the LCD shows the battery power, high voltage warning symbol (blink at 2 Hz), blinking buzzer symbol along with “beep”, real-time high output...
- Page 18 UT503PV 9.3.1.2 Time-set insulation resistance measurement In insulation resistance test function and without high voltage output, long press “ ” to select the timer measurement mode. In the timer measurement mode, the symbol “Time” appears on the LCD and the default countdown time ”05:00” flashes (the ones digit of the “min” part flashes by default), to indicate that the time can be set.
- Page 19 UT503PV Figure 9.10 Comparative resistance measurement (Default interface) Press the “TEST” button to perform test, then the LCD shows related symbols and testing result. If the measured insulation resistance is less than the preset resistance, the LCD shows “FAIL” or otherwise “PASS”.
- Page 20 UT503PV Warning: In PV mode, if the Tester detects an AC voltage or a voltage of over 1000VDC, the buzzer sounds continuously, the backlight blinks at 1 Hz and the LCD flashes at 1 Hz. The Tester cannot measurement insulation resistance with an AC voltage or a voltage of over 1000VDC in PV mode.
- Page 21 UT503PV Figure 9.13 Photovoltaic equipment Measuring steps: 1. Confirm that the TEST button is not pressed or the switch button of remote-controlled test rod is not pressed. 2. Switch the insulation resistance testing mode to photovoltaic (PV) insulation resistance testing mode.
- Page 22 UT503PV Figure 9.14 Continuous resistance measurement by default after boot-up Connect the test leads to the measured object, press the TEST button to start test, then the LCD shows corresponding test result and symbol. Note: The Tester will detect external energized voltage as priority before test. If the detected voltage exceeds 1000V DC or the voltage of the selected position, then no high voltage output will occurs, the LCD flashes at 2 Hz, and the buzzer sounds continuously.
- Page 23 UT503PV 9.3.2.2 Photovoltaic (PV) time-set insulation resistance measurement In photovoltaic (PV) insulation resistance test mode and without high voltage output, long press “ ” to select the timer measurement mode (TIME), the default set time is “05:00”. Then, short press “ ” and “ ” to select a digit place to be adjusted, short press “▲” and “▼” to adjust the value of the selected digit place, and short press the OK button to confirm and save the setting or press the main function button to cancel the setting.
- Page 24 UT503PV Figure 9.19 PV comparative resistance measurement (Default interface) Press the “TEST” button to perform test, then the LCD shows corresponding symbol and test result. If the measured insulation resistance is less than the preset resistance, the LCD shows “FAIL” or otherwise “PASS”.
- Page 25 UT503PV Figure below: Figure 9.22 Connection of voltage measurement Figure 9.23 AC voltage measurement If the red test lead is the negative voltage when measuring DC voltage, the negative symbol “-” will be displayed on the LCD. As shown in the Figure below: Figure 9.24 Negative DC voltage measurement...
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Page 26: Conventional Connecting Methods
UT503PV Please pay particular attention to avoid electric shock when measuring high voltage. After all measurement operations are completed, please disconnect the test leads with the measured object and remove the test leads from the input terminal of the Tester. - Page 27 UT503PV Figure 10.2 Connection diagram B. Measure the insulation resistance between ground of primary winding and secondary winding Figure 10.3 Connection diagram C. Measure the insulation resistance between secondary windings...
- Page 28 UT503PV Figure 10.4 Connection diagram 10.3 Testing of photovoltaic insulation resistance There are two methods to test photovoltaic insulation resistance according to IEC 62446-1. Measurement can be performed according one of the two methods, the followings are the characteristics of these methods.
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Page 29: Technical Specifications
UT503PV the solar array circuit, please prepare a switch that can withstand the short-circuit current of the solar array, since there is relatively high voltage at the solar array in day time. Short the output terminal of the solar array using the short-circuit switch, then perform test in PVΩ measurement mode of the Tester. - Page 30 UT503PV 11.1 Specifications for conventional insulation resistance measurement Measurement Overrange Short-circuit Position Measurement range accuracy indication current For reference <1.51MΩ only >1100MΩ 125V <1.5mA 1.51MΩ~100.0MΩ ±(1.5%+5) On-load current 100.1MΩ~1000MΩ ±(5%+6) capacity (Only For reference <1.51MΩ applicable to only >2200MΩ 250V conventional 1.51MΩ~200.0MΩ...
- Page 31 UT503PV 11.3 Specifications for the output voltage of conventional insulation resistance Rated Output Display Output voltage Remark voltage accuracy accuracy range In conventional testing mode, the step voltage 125V 125V~150V can be adjusted as: For 125V position: 125V, 138V, 150V...
- Page 32 UT503PV Note: When the PV measurement function is used, there is a current-limiting resistance of 1MΩ connected to the EARTH terminal, so the output voltage will be divided by 1MΩ and the resistance of the measurement terminal. For example, when measuring a resistance of 10MΩ, the output voltage will be divided by 1MΩ...
- Page 33 UT503PV √ Automatic discharge Backlight Manual/Automatic backlight Storage function Capable to save 1000 sets of testing data Upload the data to PC (unidirectional) via USB cable. Communication functions Data can be uploaded and distributed via the Bluetooth APP. √ (If low battery indication occurs, an indication of charging in time...
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Page 34: Communication Functions
UT503PV 12. Communication Functions The Tester supports communication with PC and Bluetooth APP. 12.1 Connect with PC via USB cable The Tester can be connected with a Type-C USB cable, as shown in the Figure below. Download the corresponding PC software from the official website of Uni-Trend, and install it according to the installation instructions. -
Page 35: Maintenance
UT503PV For Android For IOS 12.2.3. Use 1) Open the Bluetooth functions of both the Tester and mobile phone, tap the “iDMM2.0” APP icon on your phone desktop to open the software, then the software enters the navigation interface and searches nearby Bluetooth-enabled meters automatically. After that, select the corresponding meter and make connection.