UNI-T UT3515-Sx Series User Manual
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UNI-T UT3515-Sx Series User Manual

UNI-T UT3515-Sx Series User Manual

Micro ohm meter
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User's Manual
UT3510+ and UT3515-Sx Series Bench Top
Micro Ohm Meter
V1.1
April 2025

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Summary of Contents for UNI-T UT3515-Sx Series

  • Page 1 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter V1.1 April 2025...
  • Page 2 UNI-T, pay the shipping cost, and provide a copy of the purchase receipt of the original purchaser. If the product is shipped to the location of the UNI-T service center, UNI-T shall pay the return shipping fee. If the product is sent to any other location, the customer shall be responsible for all shipping, duties, taxes, and any other expenses.
  • Page 3 The information provided in this manual is subject to change without notice.  UNI-T shall not be liable for any errors that may be contained in this manual. For any incidental or  consequential damages arising out of the use or the information and deductive functions provided in this manual.

  • Page 4: Safety Requirements

    Users must follow the following conventional safety precautions in operation, service and maintenance of this device. UNI-T will not be liable for any personal safety and property loss caused by the user’s failure to follow the following safety precautions.
  • Page 5 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter It indicates that you should be careful to avoid personal injury or Warning product damage. It indicates possible danger, which may cause damage to this device or other equipment if you fail to follow a certain procedure Caution or condition.
  • Page 6 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Certification CE indicates a registered trade mark of EU. Certification UKCA indicates a registered trade mark of UK. Certification ETL indicates a registered trade mark of Intertek. This product meets the requirements of Waste Electrical and Electronic Waste Equipment (WEEE) Directive 2002/96/EC.
  • Page 7 If this device may be faulty, please contact the authorized maintenance personnel Abnormality of UNI-T for testing. Any maintenance, adjustment or parts replacement must be done by the relevant personnel of UNI-T. Do not block the ventilation holes at the side and back of this device;...

  • Page 8: Inspection And Installation

    Before using the instrument, 1. Check the appearance whether is damaged or scratched; 2. Check the packing list if has loss. If the product is damaged or accessory is missing, please contact UNI-T sales department or distributor. 3.2 Power Requirements Supply Voltage: AC 100 V-240 V ...
  • Page 9 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter to ensure measurement accuracy. If the instrument will not be used for an extended period, store it in its original packing box or a similar container. Store at between 0°C and 50°C with humidity ≤ 85% RH in a well-ventilated area free from corrosive gases and direct sunlight.

  • Page 10: Product Overview

    The operating duration should not exceed 16 hours. 3.8 Use of Test Fixture Only use the test cable provided by UNI-T. Using user-made or other company’s test cables may result in incorrect measurement results. Keep the test cable and the pins of the DUT clean to ensure good contact between the DUT and the test cable.
  • Page 11 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 4.1 Measurement Application Components: Resistance, inductance, transformer, motor, relay, circuit solder joint, capacitor knuckle joint, cables, strand wire, connector, and various switches. Materials: Thermal sensitive materials (fuses, heating regulator sensors), metal foil, and other conductive materials.
  • Page 12 Kelvin test clips Standard Accessories PT1000 temperature line (only for UT3516+) RS232 communication wire Size 348.5 mm*215*88 mm Weight 2.65 kg UT3515-Sx Series, Single mode: 0-8 range, Scan mode: 0-7 range Accuracy Open-circuit Maximu Resolutio Test Range Voltage on Fast...
  • Page 13 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 2.2000 2 MΩ 100 Ω 0.8 % ± 5 0.2 % ± 5 0.1 % ± 5 1 μA < 2.7 V MΩ Range Mode Auto, manual, and nominal...
  • Page 14 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 4.3 Main Features 4.3-inch TFT LCD  Accuracy of 0.05 %, with 22,000 reading  High resolution of 1 μΩ, with 4 1/2 digit display  UT3513+ measurement range: 1 μΩ--20 kΩ...

  • Page 15: Front And Rear Panel

    User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 5. Front and Rear Panel 5.1 Front Panel Figure 5-1 Front Panel Function Description Power Switch Turn on/off the Ohm Meter Functional keys (at the The function key changes according to the menu displayed on the screen.
  • Page 16 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 5.2 Rear Panel Figure 5-2 Rear Panel Function Description Power Socket Used to connect AC power. The Handler interface simplifies the setup of a test system for automated testing. Through this interface, the instrument outputs the...
  • Page 17 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter LAN Interface TCP communication interface PT1000 Temperature correction Used to connect temperature sensor Interface Used to connect the instrument to ground for protective or shielded Grounding Wire ground connections.
  • Page 18 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Figure 5-5 Connect Wiring for Test Cable and Test Terminal 5.4 Multi-channel scanning test terminal Multi-channel scanning test terminal shown as below. D+/D+ represents Drive High and Drive Low; S+/S- represents Sense High and Sense Low.
  • Page 19 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 5.4 Calibration Before testing, perform a short-circuit calibration to eliminate the stray resistance caused by the test wires or external environment. If the test resistance is very small, such as 20 mΩ, the voltage signal will be very weak when the test current pass through the resistance, possibly only a few mV.
  • Page 20 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter UT3515-Sx Series: When the cursor is in <Test> page, press [Set Zero] at the bottom of the screen to start clearing. At the bottom of the screen pops up "channel <1> short circuit clear.";...
  • Page 21 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Or users could press [MULT ZERO] key, and use the Numeric Keypad to enter channel number to do the zero clearing. (channels need to be short-circuited before zero clearing start.) Step 3 After zero clearing, the beeper will sound, and a prompt saying “Zero setting...

  • Page 22: Display Page

    User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 6. <Test> Display Page 6.1 UT3510+ Series <Test> Page Boot up the instrument or press the [Test] key to enter the [Test] page. If the test page displays OL, it indicates that the test clips are disconnected or the measurement exceeds the test range.
  • Page 23 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Automatic range selection requires pre-testing of the range, so the test speed will be slower compared to manual range selection. However, users do not need to set it manually.
  • Page 24 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 6.2 UT3515-Sx Series <Setup> Page Boot up the instrument or press the [Test] key to enter the [Test] page. If the test page displays OL, it indicates that the test clips are disconnected or the measurement exceeds the test range.
  • Page 25 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter SAVE & STOP Save the recorded data and stop recording STOP & CLEAR Stop recording and clear the buffer area SAVE TO USB DISK Save the recorded data to a USB Disk...
  • Page 26 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 6.3 <Setup> Page Figure 6-2 <Setup> Page TRIG/RANGE/COMP/SPEED can be set on the <TEST> page, refer to <TEST> page for more details. Item Function Description The zero clearing function can only be enabled...
  • Page 27 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter OFF: Disable the temperature function TC: Enable the temperature TC/∆t Setup TC/∆t Refer to for more details. correction function ∆t: Enable the temperature conversion function ∆t TC/∆t Setup Only in...
  • Page 28 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter caused by the temperature variations. Connect the temperature compensation wire to the temperature compensation port on the instrument’s rear panel. TC (Temperature Correction) function: This function converts the resistance measured under the current ambient temperature to the resistance at a user-defined temperature.
  • Page 29 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter For example, when the initial temperature of t1 is 20℃, R1 is a copper wire with a resistance of 200 mΩ, ta (the current ambient temperature) is 25℃, and R2 is 210 mΩ, the increasement of temperature can be calculated using the following formula: ��2...
  • Page 30 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter (Conductivity) 0.01 - 0.26 0.98 0.93 0.26 - 0.50 0.993 0.94 0.96 0.50 - 2.00 1.00 0.96 0.96 2.00 - 8.00 1.00 0.97 0.97 α Temperature coefficient varies with ambient temperature and material conductivity.
  • Page 31 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter ON: Enable the key beep Key Beep OFF: Disable the key beep DATE/TIME xxxx-xx-xx xx:xx:xx Set the data and time Remote control interface for REMOTE RS232, LAN, RS485 communication...
  • Page 32 BIN, allowing set the compare result for 6 BIN. The measured component can be divided into 7 BINs: BIN1, BIN2, BIN3, BIN4, BIN5, BIN6, and NG. The built-in comparator of the UT3515-Sx series measures the results of each of the multiple channels separately, dividing the components under test into three levels (N(off), H(exceed upper limit), L(exceed lower limit), P(Pass)).
  • Page 33 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter On the <Test> page, press the [COMP] to enter the <Comparator Setting> page. UT3510+ Series: UT3515-Sx Series Figure 6-5 <Setup> Page Item Function Description OFF: Disable the comparator. OFF; 1-BIN; 2-BIN; 3-BIN; 4-BIN;...
  • Page 34 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter UT3510+ series can set the upper and lower limits for 6 pairs. The upper limit of each BIN LOWER Set the lower limit of this BIN should greater than the lower limit; otherwise, the component will not be sorted into its BIN.
  • Page 35 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter When setting the limits for tolerance mode, the error range should be ordered from smallest to largest. If the error range in BIN1 is the maximum, then all DUTs will be sorted to BIN1.
  • Page 36 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Forbid: The user-defined parameters can only be Forbid: The setting data will not be manually saved to a file; otherwise, they cannot be saved. Auto Save loaded at the next boot-up.
  • Page 37 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Rename File: Enter the rename file page as shown in Figure 6-10. Use the numeric keypad to enter the number. Alternatively, use the arrow keys (or the function key at the bottom of the screen) to move the cursor to select letter or number.
  • Page 38 PC via communication port, or directly saved in CSV format to USB Disk. Only R and LPR mode can use the recording and statistics function. (UT3515-Sx Series do not have the statistic function.) Instruments.uni-trend.com...
  • Page 39 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Figure 6-11 Recording and Statistic Function on <System Config> Page Setting steps for Recording and Statistic Functions On the <System Config> page, use the arrow keys to move to Record or Statistic field.
  • Page 40 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Figure 6-12 Recording Process Figure 6-13 Recording Completed Item Function START Start recording data SAVE TO U DISK Save the cached data to a USB Disk CLEAR BUFFER Clear the cached data...
  • Page 41 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Maximum value Minimum value Population standard deviation Sample standard deviation Capability index of process (deviation) Capability index of process (bias) Data statistics function can only be set when Statistic function is enabled on the <System Config>...
  • Page 42 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter after the modification. Figure 6-17 Data Display Setting steps for the cell format: Select a data and right-click to choose “Format Cells” Select “Custom” to change the display type to “yyyy/m/d”.
  • Page 43 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Cp, CpK < 1.00 indicates that the process capability is insufficient. Capability Index of Process and Formula Capability Index of Process Formula �� ∑ �� Average (Mean) ��=1 �� = ��...

  • Page 44: Handler Interface

    User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 6.12 System Information Press the [Test] or [Setup] key to enter the main page, and press the function key [System Config] key at the bottom of the screen to enter the <System Config> page. Press the [System Info] key to view the model’s name, serial number, and version number of the instrument.
  • Page 45 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter /BIN3 /BIN4 /BIN5 Collector output /BIN6 Active low Unqualified (Fail) Photoelectrical coupling isolation signal End of all /EOM measurements Pulse width ≥ 1μs, rising edge trigger, low level drive...
  • Page 46 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Figure 7-1 Opened Zone in Compare Function 7.2.2 Terminal and Signal Figure 7-2 Handler Interface The pin assignments and brief descriptions of the signals are shown in Table 7-2 and Figure 7-2, and the time sequence is detailed in Figure 7-3.
  • Page 47 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter T2: Trigger delay 10 μs Related to the test speed: high, fast, T3: Test time medium, and slow T4: BIN output delay 200 μs T5: Wait time after trigger During the high test, the sorting result will be sent 10 ms after the start signal.
  • Page 48 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 7.2.4 Schematic Diagram for Input Terminal Figure 7-4 Schematic Diagram for Input Terminal (Trig) 7.2.5 Schematic Diagram for Output Terminal Figure 7-5 Schematic Diagram for Output Terminal 7.2.6 Circuit Connection for Input Circuit Figure 7-6 Circuit Connection for Connected with Switch Instruments.uni-trend.com...
  • Page 49 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Figure 7-7 Circuit Connection of Relay Control Figure 7-8 Circuit Connection for Negative Common Terminal of PLC Control Figure 7-9 Circuit Connection for Positive Common Terminal of PLC Control Instruments.uni-trend.com...
  • Page 50 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 7.2.7 Circuit Connection for Output Circuit Figure 7-10 Circuit Connection for Control Relay Figure 7-11 Circuit Connection for Control Diode or Photoelectric Coupler Figure 7-12 Circuit Connection for Negative Logic Output Instruments.uni-trend.com...
  • Page 51 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Figure 7-13 Circuit Connection for Two Output Combined Logic or Circuit Figure 7-14 Circuit Connection for Output to Negative Common Terminal of PLC Control Figure 7-15 Circuit Connection for Output to Positive Common Terminal of PLC Control Instruments.uni-trend.com...

  • Page 52: Remote Communication

    User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter 8. Remote Communication 8.1 RS-232C Introduction RS-232 is a widely used serial communication standard, also known as the asynchronous serial communication standard. It is used to facilitate data communication between computers and peripherals.
  • Page 53 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Ground The connector uses a 9-pin DB socket, with pin sequence as shown in Figure 8-1. Figure 8-1 Rear View of RS232C/485 8.2.2 RS485 Interface The instrument is equipped with an RS485 interface. RS485 and RS232 use the same DB 9 terminal. RS485 supports multi-machine communication and can be connected to various machines via a master machine.
  • Page 54 User’s Manual UT3510+ and UT3515-Sx Series Bench Top Micro Ohm Meter Figure 8-2 Instrument Connect to a PC 8.4 Serial Port Parameter Table 8-4 Serial Port Parameter Transmission Mode Full-duplex Asynchronous Communication with Start and Stop bits 115200 bps Baud rate...

  • Page 55: Appendix A Maintenance And Cleaning

    If the product is proven to be defective within this period, UNI-T will repair or replace the product in accordance with the detailed provisions of the warranty.
  • Page 56 Many UNI-T products offer options for extending the warranty and calibration period. Please reach out to your local UNI-T dealer or sales center for more information. To find the address list of our service centers, please visit our website at: UNI-T Website Instruments.uni-trend.com...

This manual is also suitable for:

Ut3510+ seriesUt3513+Ut3516+Ut3515-s10Ut3515-s20Ut3515-s30

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