UNI-T UTL8500 Series User Manual
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UNI-T UTL8500 Series User Manual

Programmable dc electronic load
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UTL8500 Series
Programmable DC Electronic Load
User Manual

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Summary of Contents for UNI-T UTL8500 Series

  • Page 1 UTL8500 Series Programmable DC Electronic Load User Manual...

  • Page 2: Preface

    If the product is proved to be defective within the warranty period, UNI-T reserves the rights to either repair the defective product without charging of parts and labor, or exchange the defected product to a working equivalent product (determined by UNI-T).

  • Page 3: Guarantee Limit

    This warranty is written by UNI-T for this product and it is used to substitute any other express or implied warranties. UNI-T and its distributors do not offer any implied warranties for merchantability or applicability purposes.
  • Page 4 10% of rated operating range to prevent damage. Use the correct power line: Only use the dedicated UNI-T power line to connect the measured power supply and the electronic load, which is to ensure that there is no overheat by short-circuit current, otherwise electric shock may occur.

  • Page 5: Safety Symbols

    UTL8500 Series User Manual Safety Symbols Alternating Both Direct and Direct Current Current Alternating Current Three Phase Earth (Ground) Protective Conductor Terminal Terminal Caution, Signal Possibility of Warning or Caution Grounding Electric Shock Neutral Wire or Central Live Wire On (Power)

  • Page 6: Table Of Contents

    UTL8500 Series User Manual Table of Contents Preface ........................2 Copyright Information ..................... 2 Warranty Service ..................... 2 Guarantee Limit ....................... 3 Safety Information ....................3 Safety Symbols ....................... 5 1. Product Description .................... 8 1.1 Product Series ....................8 1.2 Front Panel ......................
  • Page 7 UTL8500 Series User Manual 4.2.4 OCP/OPP Mode ..................29 4.2.5 CR-LED Mode ..................30 4.2.6 Battery Mode ................... 31 4.2.7 Load Effect ....................33 4.2.8 OVP Mode ....................34 4.2.9 Short-Circuit Mode .................. 35 4.2.10 Time Mode .................... 36 4.3 Parameter Input and Loading Measurement ..........37 4.3.1 Numeric Key ....................

  • Page 8: Product Description

    0~120A 0~600W UTL8500 series DC electronic load comes with 4.3-inch LCD screen, wide power range and up to 0.1mV/0.1mA resolution. It supports multiple test modes: dynamic test, overload test, auto test, list test, battery test and CR-LED test, etc. The instrument is great tools in areas of electronic performance test, battery set test, power supply test, new energy test, aerospace industries, high-power test, labs, R&D and production line, etc.

  • Page 9: Front Panel

    UTL8500 Series User Manual  The list mode comes with storage, and supports the saving and applying of the external U disk and the upgrade of the U disk system.  Screenshot Function with List Storage & Recall  Equipped with Standard RS232 Interface and Support More Extension Interfaces (USB or RS-485 Converted by RS-232) ...
  • Page 10 UTL8500 Series User Manual Delete the Input Values Pulse Knob: It is used to adjust the parameters or move cursor in ④ the menu. Direction Buttons: They are used to move cursor or adjust the ⑤ selected value. F1-F6 Function Keys: They are used to perform the function ⑥...

  • Page 11: Rear Panel

    UTL8500 Series User Manual 1.3 Rear Panel Figure 1-3-1 Rear Panel Table 1-3-1 Introduction of Rear Panel Items Description ① AC 220/110V Socket AC Power Input Socket (with Fuse) ② ON/OFF Power Button ③ Trigger Signal Terminal Please refer to part 6.2 for details.

  • Page 12: Packing List

    Factory Quality For UTL8512B+ and UTL8513 Report Certificate of Conformity and Warranty 2.2 Requirements of Power Supply UTL8500 series can only be used in following conditions: Parameters Requirements Voltage AC 220/110 (± 10%)V Frequency 50/60Hz Power AC220V Input Voltage: 240V/0.25A Fuse AC110V Input Voltage: 120V/0.5A...

  • Page 13: Operating Environment

    250V/0.5A fuse when 110V AC power is input. 2.3 Operating Environment UTL8500 series can only be used in common-temperature and low-condensing zone. The general environment requirements are listed as follows. During the on-load process, the speed of the cooling fan will adjust based on the change of the cooling fin’s temperature.

  • Page 14: Display Page Of Measurement

    UTL8500 Series User Manual Figure 2-5-1 Original Handle Position Figure 2-5-2 Handle Position during Measurement Figure 2-5-3 Removing Position Figure 2-5-4 Lifting Position 3. Display Page of Measurement This chapter mainly covers the following:  Power on and Run ...

  • Page 15: Introduction Of Screen Display

    UTL8500 Series User Manual Note: Please read through the content of safety information in preface carefully before using the load. Warning: Please make sure that the power supply voltage is consistent with the supply voltage before turning on the power, otherwise the instrument will be burnt out. Please be sure to connect the main power plug to a power socket with ground protection.

  • Page 16: Introduction Of Status Bar

    In Pause Status 3.2.3 Running Indicator UTL8500 series electronic load comes with running indicator on the ON button. In on-load mode, the indicator will light up, indicating that the load is in a loaded status. Pressing the ON button again can stop loading and the indicator will go out.

  • Page 17: Constant State Test Modes

    UTL8500 Series User Manual  Saving and Applying of Configuration 4.1 Constant State Test Modes There are four types of constant state test mode: constant current (CC), constant voltage (CV), constant resistance (CR) and constant power (CP). In the initialization interface, the user can select [Mode] by pressing the soft key at the bottom of the screen, and then press [CC], [CV], [CR], [CP] to enter the corresponding mode.

  • Page 18: Constant Voltage Test

    UTL8500 Series User Manual Figure 4-1-1-1 Setting Interface of CC Mode Operation Steps: 1. In initial interface, select [Mode], and then press [CC] to enter the setting interface of <Constant Current CC>. 2. Move the cursor to current setting by pulse knob, and press the Enter button change the current value (the value changes from yellow to white) by keyboard or pulse knob.

  • Page 19: Constant Resistance Test

    UTL8500 Series User Manual Figure 4-1-2-1 Setting Interface of CV Mode Operation Steps: 1. In initial interface, select [Mode], and then press [CV] to enter the setting interface of <Constant Voltage CV>. 2. Move the cursor to voltage setting by pulse knob, and press the Enter button change the voltage value (the value changes from yellow to white) by keyboard or pulse knob.

  • Page 20: Constant Power Test

    UTL8500 Series User Manual Figure 4-1-3-1 Setting Interface of CR Mode Operation Steps: 1. In initial interface, select [Mode], and then press [CR] to enter the setting interface of <Constant Resistance CR>. 2. Move the cursor to resistance setting by pulse knob, and press the Enter button to change the resistance value (the value changes from yellow to white) by keyboard or pulse knob.
  • Page 21 UTL8500 Series User Manual Figure 4-1-4-1 Setting Interface of CP Mode Operation Steps: 1. In initial interface, select [Mode], and then press [CP] to enter the setting interface of <Constant Power CP>. 2. Move the cursor to power setting by pulse knob, and press the Enter button change the power value (the value changes from yellow to white) by keyboard or pulse knob.

  • Page 22: More Modes

    UTL8500 Series User Manual 4.2 More Modes To meet various test requirements, UTL8500 series electronic load offers more test modes for choice, including Dynamic, List, Dual, OCP/OPP, CR-LED, Battery, Load Effect, OVP, Short Circuit, Time and more, as shown in Table 4-2.

  • Page 23: Dynamic Mode

    UTL8500 Series User Manual 4.2.1 Dynamic Mode UTL8500 series electronic load has two dynamic loading modes: CC and CV. In the dynamic mode, the user can set two fixed-value parameters for corresponding constant state modes. Through the set operation mode, the load is switched back and forth between the two values.

  • Page 24: List Mode

    UTL8500 Series User Manual back and forth between the lower current and the upper current. Upper Value Fall Slope Rise Slope Lower Value Upper Duration Lower Duration One Cycle Figure 4-2-1-2 Dynamic Mode Operation Steps: 1. In initial interface, select [Mode], and then press [Dynamic] to enter the setting interface of <Dynamic Mode>.
  • Page 25 UTL8500 Series User Manual Figure 4-2-2 Setting Interface of List Mode 4.2.2.1 Parameter Setting in List Mode In the setting interface of list mode, the upper area is used to set the list group number and other parameters, as shown in the following table 4-2-2-1.
  • Page 26 UTL8500 Series User Manual 4. Select the storage location (Flash memory/U disk) before saving and press the save button to finish saving; record the set group number so that it can be called next time. <Step> After setting the group number, rotate the knob to move the cursor to [Step] to set the number of steps for the list test, up to 16 steps can be set.
  • Page 27 UTL8500 Series User Manual Operation Steps: 1. Use the knob or arrow key to move the cursor to a specific line. 2. First select the modes of each step, and press or the knob to change the current mode. Stop when the desired mode appears, and switch the cursor to set the next parameter by rotating the knob or pressing direction keys 3.

  • Page 28: Dual Mode

    UTL8500 Series User Manual 4.2.3 Dual Mode In order to meet more test requirements, the electronic load provides three dual modes: CR+CC, CV+CR and CV+CC. The user can choose the appropriate mode according to the actual situation. CR+CC can be used for power-on test, CV+CR can be used for setting the Von point, and CV+CC can be used for battery discharge test.

  • Page 29: Ocp/Opp Mode

    4.2.4 OCP/OPP Mode This mode is used to detect the protection function of the tested power supply under overload conditions. UTL8500 series electronic load provides two test modes: OCP/OPP. Figure 4-2-4-1 Interface of OCP/OPP Mode Parameter Setting in OCP/OPP Mode:...

  • Page 30: Cr-Led Mode

    UTL8500 Series User Manual Start Current Step Current Step Time Figure 4-2-4-2 OCP/OPP Mode Description of OCP/OPP Mode: Since OCP/OPP mode will continuously increase the output power of the tested object, please input reasonable load parameters during the test to avoid damage to the tested object.

  • Page 31: Battery Mode

    UTL8500 Series User Manual avoiding oscillations and other unstable conditions produced by constant resistor discharge, so as to better check the actual loading of the LED drive power supply. Figure 4-2-5-1 Interface of CR-LED Mode Parameter Setting in CR-LED Mode:...
  • Page 32 UTL8500 Series User Manual Figure 4-2-6-1 Interface of Battery Mode Parameter Setting in Battery Mode: Parameter Description Mode Battery Discharge Mode: CC/CR/CP Load Value Set Loading Value Stop Voltage Set the Lower Limit Voltage of Stopping Discharge In the battery mode, select any discharge mode as needed, and set the load parameters and stop voltage of this mode.

  • Page 33: Load Effect

    UTL8500 Series User Manual 2. Move the cursor to the needed setting position by pulse knob, and press the Enter button to change the parameter (the parameter changes from yellow to white) by keyboard or pulse knob. Press the Enter button again to confirm.

  • Page 34: Ovp Mode

    UTL8500 Series User Manual Operation Steps: 1. In initial interface, select [Mode], [More], [More], and then press [Load Effect] to enter the setting interface. 2. Move the cursor to the needed setting position by pulse knob, and press the Enter...

  • Page 35: Short-Circuit Mode

    UTL8500 Series User Manual Operation Steps: 1. In initial interface, select [Mode], [More], [More], and then press [OVP] to enter the setting interface. 2. Move the cursor to the needed setting position by pulse knob, and press the Enter button to change the parameter (the parameter changes from yellow to white) by keyboard or pulse knob.

  • Page 36: Time Mode

    UTL8500 Series User Manual Operation Steps: 1. In initial interface, select [Mode], [More], [More], and then press [Short Cir] to enter the setting interface. 2. Move the cursor to the needed setting position by pulse knob, and press the Enter...

  • Page 37: Parameter Input And Loading Measurement

    UTL8500 Series User Manual Value Set the Load Value of the Current Mode Start Trigger Set the Start Condition (Voltage/Current/External) End Trigger Set the End Condition (Voltage/Current/External) Start Edge Start Trigger Mode: Rise/Fall End Edge End Trigger Mode: Rise/Fall Start Value...

  • Page 38: Pulse Knob

    4.3.3 Ripple Measurement UTL8500 series electronic load supports voltage ripple (Vpp) and current ripple (lpp) measurement and real-time display. In the test interface, you can see these parameters: Vpp/Vp+/Vp-, lpp/lp+/lp-, and you can alternately view the required parameters by using the "Page"...

  • Page 39: Sense

    UTL8500 Series User Manual 4.5 Sense When the electronic load is loaded with a relatively large current, it will produce a large voltage drop on the connection lead between the load and the measured object. In order to ensure the measurement accuracy, the electronic load has a pair of remote measurement terminals on the rear panel.

  • Page 40: System Configuration Page

    The format of list file name is in LIST000.txt, and the last two numbers indicate the group number of the test mode. UTL8500 series electronic load can save commonly used test files in U disk or internal Flash. Flash can save 60 groups of test files.
  • Page 41 UTL8500 Series User Manual Figure 5-1 System Configuration Page Table 5-1 Description of Parameters on System Configuration Page System Parameter Setting Content Description Language [CHN]/ENGLISH Set System Language Whether to Enable Key Key Sound On/Off Sound Date Year/Month/Day Set System Date...

  • Page 42: Language

    5.1.4 Warn Sound The UTL8500 series electronic load has warn sound function. When the load ends or encounters an abnormal problem during the test, the electronic load will emit a warn sound through the built-in buzzer. When the test is successful, the load will emit two short beeps.

  • Page 43: Knob Active

    UTL8500 Series User Manual on is the test mode used before the last shutdown. If "Default" is selected, the electronic load will enter a constant current (CC) test mode after each power-on. 5.1.8 Knob Active This option is used to make the current adjustment by the knob take effect immediately. It is on by default, that is, every time you rotate the knob to change the parameter in CC, CV, CR, CP mode, it will take effect immediately.

  • Page 44: Parameter Setting

    UTL8500 Series User Manual Parameter Setting (UTL8511) System Configuration (UTL8511) 5.2 Parameter Setting You can enter the system configuration interface by pressing the [System] key, and select [Para Set] at the bottom of the screen can enter the <PARAMETER SETTING> page, as shown in Figure 5-2.
  • Page 45 UTL8500 Series User Manual Delay On 0~9999s Set the Start Time of Delay Set the Time for Short Circuit Short Time 0.1~99999ms Test Set the Voltage Value of Over- V Limit 0~150V Voltage Protection Set the Current Value of Over-...
  • Page 46 UTL8500 Series User Manual This operation is suitable for testing environments that do not need manual operations such as automated production lines. The default self-start voltage of the device is 0, which means it is not enabled. When you need to use, first set the required V Trigger in the parameter setting, then you only need to set the parameters in the list mode according to the normal operation, and then you can enter the test.

  • Page 47: File

    UTL8500 Series User Manual Copy and apply: The user can copy and apply the list test files of the two storage spaces, and at the same time, the files can also be deleted. File Function: Name Description Select U Disk or Flash as the Currently Displayed...

  • Page 48: Communication Interface And Terminal

    Introduction of Terminal 6.1 RS-232C UTL8500 series electronic load is equipped with RS-232C communication interface according to standards. You can use the corresponding communication lead for remote operation if you need. There is a DB9 female interface at the end of the electronic load, which can be connected to the computer COM port by using a standard RS-232C cable.
  • Page 49 In order to ensure the measurement accuracy, the UTL8500 series electronic load provides a remote measurement terminal on the rear panel. The user can use this terminal to measure the...
  • Page 50 UTL8500 Series User Manual Front Panel-Input Terminal Object under Test Rear Panel-Measurement Terminal Figure 6-3 Wiring Diagram of Remote Compensation SE+ and SE- are remote input terminals. In order to avoid the voltage drop caused by too long load input leads, remote test allows to measure directly on the input terminal source to improve measurement accuracy.

  • Page 51: Technical Specifications

    UTL8500 Series User Manual 2. Wiring Method for Active Trigger Input (External Power Signal) 3. Wiring Method for Test Result Output (Need External Power Supply) Note: 1) The voltage range of all external power supplies shall not exceed DC5V~DC24V. 2) The maximum withstand current of the test result output terminals (④ and ⑤) is 20mA.
  • Page 52 UTL8500 Series User Manual Table 7-1 Main Technical Parameters of UTL8500 Series Electronic Load Model UTL8511 UTL8512 UTL8512B+ UTL8513 Input V olt age 0~150V 0~150V 0~500V 0~150V Input Current 0~3A 0~30A 0~3A 0~30A 0~1.5A 0~15A 0~12A 0~120A Rat ed V alue...
  • Page 53 UTL8500 Series User Manual Remarks: Environmental Requirements: 23℃± 5℃ ≤90%RH. Recommended Calibration Frequency: Once/Year AC Power Input Level: (The switch on the rear panel of the electronic load can choose 110V or 220V) 110V: 110V± 10% 50~60Hz 220V: 220V± 10% 50~60Hz...

This manual is also suitable for:

Utl8511Utl8512Utl8512b+Utl8513

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