UNI-T UT8805E Manual
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UNI-T UT8805E Manual

Benchtop digital multimeter
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English Man ua l
UT8805E Benchtop Digita lMu
l t i m e t e r

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Summary of Contents for UNI-T UT8805E

  • Page 1 English Man ua l UT8805E Benchtop Digita lMu l t i m e t e r...

  • Page 2: Preface

    UNI-T is the registered trademark of Uni-Trend Technology (China) Co., Ltd. Declaration  UNI-T products are protected by patent rights in China and other countries, including issued and pending patents.  Uni-Trend reserves the rights to any product specification and pricing changes.
  • Page 3 In case the meter is not used properly as instructions, the protection provided may be weakened or lost.  Please use the dedicated UNI-T power supply wire appointed to the local region or country for this product, and check if there is any metal part exposed or insulating layer damage.
  • Page 4 WARNING: IEC measurement category II includes electrical devices connected to mains by a socket on a branch circuit, such as most small appliances and measuring instruments. UT8805E can apply to make following measurements: input terminals HI and LO are connected to the mains of IEC measurement category II devices (maximum 300V AC) or are connected to branch outlets.

  • Page 5: Safety Terms And Symbols

    UT8805E Benchtop Digital Multimeter Safety Terms and Symbols Terms in the manual --- Following terms may appear in this manual: Warning: a Warning specifies conditions and actions that may pose hazards to the user. Caution: a Caution identifies conditions and actions that may cause damage to the product or other properties.

  • Page 6: Overview

    UT8805E Benchtop Digital Multimeter Overview UT8805E is a 200000 count benchtop digital multimeter with high precision, multi-function and full- automatic functions of mathematical operations, capacitance, temperature and other basic measurements. UT8805E comes with 4.3-inch 480*272 TFT display, supports LAN, USB, RS-232C and GPIB (optional) operations, which makes it a great laboratory instrument and a precise measurement tool for automated test systems.

  • Page 7: Table Of Contents

    UT8805E Benchtop Digital Multimeter Table of Contents Preface----------------------------------------------------------------------------------------------------------------------------------------2 Copyright Information---------------------------------------------------------------------------------------------------------------------2 Safety Terms and Symbols-------------------------------------------------------------------------------------------------------------5 Overview--------------------------------------------------------------------------------------------------------------------------------------6 Chapter 1 Quick start---------------------------------------------------------------------------------------------------------------------9 1.1 General Checking ......................... 9 1.2 Handle Adjustment ........................9 1.3 Front Panel ..........................10 1.4 Rear Panel ..........................10 1.5 Power On ............................. 11 1.6 User Interface ..........................
  • Page 8 4.2 Crest Factor Error (Non-sinusoidal Input) ................... 49 4.3 Load Error (AC Voltage) ......................50 Chapter 5 Trouble Shooting-----------------------------------------------------------------------------------------------------------51 Chapter 6 Appendix----------------------------------------------------------------------------------------------------------------------52 Appendix A: Accessories of UT8805E ....................52 Appendix B: Warranty ........................52 Appendix C: Maintenance and Cleaning ..................52 Appendix D: Contacts ........................52...

  • Page 9: Chapter 1 Quick Start

    UT8805E Benchtop Digital Multimeter Chapter 1 Quick start This chapter is a simple guide of preparation before using, the front/real panel and interfaces of UT8805E digital multimeter. 1.1 General Checking Checking for any damage in transit Keep the package if the packing carton or foamed plastic cushion is seriously damaged, until the multimeter and accessories pass the electric and mechanical inspections.

  • Page 10: Front Panel

    UT8805E Benchtop Digital Multimeter 1.3 Front Panel UT8805E comes with a simple clear front panel, its controlling buttons are designed by logic and can be easily found to make basic operation. See Figure1-4. Figure 1-4 Front panel [A] LCD display...

  • Page 11: Power On

    UT8805E Benchtop Digital Multimeter 1.5 Power On Please follow these steps to power on the multimeter: According to local power supply standard, adjust the AC voltage selector to be 100(100~110V, 45~440Hz, AC), 120(110~132V, 45~440Hz, AC), 220(200~240V, 45~66Hz, AC), or 240(216~264V, 45~66Hz, AC).

  • Page 12: Chapter 2 Panel Operation

    UT8805E Benchtop Digital Multimeter Chapter 2 Panel Operation  DC voltage/current measurement  AC voltage/current measurement  2/4-wire resistance measurement  Capacitance/temperature measurement  Continuity/diodes measurement  Frequency/period measurement  Dual display or auxiliary system utility  Acquire setting or help system ...
  • Page 13 UT8805E Benchtop Digital Multimeter conveniently. Users can also choose ranges manually for faster readings and results. The range selector is located on the right side of the front panel as Figure 2-1. Increase range, and disable auto range Auto range...

  • Page 14: Reading Speed Selection

    The basic measurement functions of UT8805E include measurements of DC/AC voltage, DC/AC current, 2/4-wire resistance, capacitance, continuity, diode, frequency/cycle and temperature. 2.3.1 DC Voltage Measurement The maximum DC voltage range of UT8805E is 1000V, and DC voltage measurement is selected by default. The connecting methods and operation are introduced below. Steps: 1) Press button to enter interface of DC voltage measurement as Figure 2-4.
  • Page 15 UT8805E Benchtop Digital Multimeter Figure 2-4 Interface of DC voltage measurement 2) Connect test leads to the measured voltage as Figure 2-5, red test lead should be connected to terminal HI, and the black one to terminal LO. Figure 2-5 Connection of DC voltage measurement 3) Select proper range according to input DC voltage.

  • Page 16: Dc Current Measurement

    UT8805E Benchtop Digital Multimeter show. 2.3.2 DC Current Measurement The maximum DC current range of UT8805E is 10A. The connecting and measurement methods are shown below: Steps: Press button, then press button again to enter DC current measuring interface, as figure...

  • Page 17: Ac Voltage Measurement

    UT8805E Benchtop Digital Multimeter 2.3.3 AC Voltage Measurement The maximum AC voltage range of UT8805E is 750V. The connecting and measurement methods are shown below: Steps: 1) Press button to enter the interface of AC voltage measurement as Figure 2-8:...

  • Page 18: Ac Current Measurement

    6) History data review User can check the history data by number, bar chart, trend chart, and histogram. 2.3.4 AC Current Measurement The maximum AC current range of UT8805E is 10A. The connecting and measurement methods are shown below: Steps:...

  • Page 19: 2-Wire/4-Wire Resistance Measurement

    User can check the history data by number, bar chart, trend chart, and histogram. 2.3.5 2-wire/4-wire Resistance Measurement Both the 2-wire/4-wire resistance measurement modes are provided by UT8805E. The connecting and measurement methods are shown below: A. 2-wire Resistance Measurement...
  • Page 20 UT8805E Benchtop Digital Multimeter Note: all ranges are allowed to exceed range by 20%. 4) Relative value setting Turn the relative operation on, the displayed value is the actual measured value minus the setting relative value. About relative value setting, please refer to 2.10 Mathematical Functions.

  • Page 21: Frequency Measurement

    UT8805E Benchtop Digital Multimeter Open circuit voltage <8V Input protection a) DC 1000V or AC 750Vrms for all ranges (terminal HI) b) DC 200V for all ranges (terminal Sense HI and terminal Sense Configurable Range, reading speed, relative operation set value parameters Note: all ranges are allowed to exceed range by 20%.

  • Page 22: Signal Cycle Measurement

    UT8805E Benchtop Digital Multimeter Figure 2-20 Connection of signal frequency measurement 3) Select proper range according to the input AC voltage. Range 200mV, 2V, 20V, 200V, 750V Input protection DC 1000V or AC 750Vrms for all ranges (terminal HI) Configurable parameters...

  • Page 23: Continuity Test

    UT8805E Benchtop Digital Multimeter Figure 2-22 Connection of signal cycle measurement 3) Select proper range according to the input AC voltage. Range 200mV, 2V, 20V, 200V, 750V Input protection 750Vrms for all ranges (terminal HI) Configurable parameters Voltage range, relative operation set value 4) Relative value setting Turn the relative operation on, the displayed value is actual measured value minus the set relative value.

  • Page 24: Diode Measurement

    UT8805E Benchtop Digital Multimeter The short circuit defaulted value is 30Ω, and can be set by direction buttons. Users can carry continuity test directly if this parameter is no need to be modified. The characteristics of continuity test: Test current 2kΩ...

  • Page 25: Temperature Measurement

    DC 1000V OR AC 750Vrms (terminal HI) 4) Test the testing point and read the displayed value. 2.3.10 Temperature Measurement Both thermocouple and thermal resistance types of temperature sensor are supported by UT8805E. The connecting and measurement methods are shown below: Steps:...
  • Page 26 About relative value setting, please refer to 2.10 Mathematical Functions. 5) Unit setting 3 units of temperature, ° C, ° F, K, are selectable in UT8805E. 6) Test the testing point and read the displayed value. Note: When the input terminal is in dangling state in thermocouple temperature measurement, random reading will show.

  • Page 27: Relative Measurement Parameters

    UT8805E Benchtop Digital Multimeter The refreshing rate of measured value depends on the measured capacitance value. 6) History data review User can check the history data by number, bar chart, trend chart, and histogram. Note: please discharge the capacitor before high-capacity electrolytic capacitor measurement.

  • Page 28: Dual Display Function

     2.4.3 Dual Display Function The dual display function can display primary measurement value and additional measurement value simultaneously. Press button to turn on the dual display function. UT8805E supports the following dual display combination: Additional measurement FREQ FREQ FREQ...

  • Page 29: I/O Configuration

    UT8805E Benchtop Digital Multimeter Menu Description The interfaces setting System System information and setting Time System time setting Upgrade Firmware upgrade Default settings restorable for all of the configurable items, Default such as function, reading rate, input impedance, relative Setting value, threshold, beeper, probe type, temperature unit, display mode, etc., see the menu for details...

  • Page 30: System Settings

    UT8805E Benchtop Digital Multimeter  RS-232C Setting By setting RS-232C Uart, make sure the settings of baud rate, parity and stop bit are match with the computer setting. The setting of Uart is saved in non-volatile memory. Steps: 1) Press [Uart] button after opening the interfaces setting menu: Figure 2-34 RS-232C 2) Value can be modified by direction buttons.

  • Page 31: Time Setting

    UT8805E Benchtop Digital Multimeter Function menu Description Lang Language of menu setting Beeper Turn the beeper on/off Adjust backlight between 10%, 30%, 50%, 70%, 90% and Light 100% Format The digits format in menu About Check the system version Done...

  • Page 32: Samples Acquirement Setting

    UT8805E Benchtop Digital Multimeter 4) U-disk can be pulled out only after the upgrade is completed and the instrument is restarted. 5) Restart the instrument and check the updated version information. Press [Shift] → [Dual], and then select [System] → [About] to check whether upgraded version of software/hardware is right or not.

  • Page 33: External Trigger

    UT8805E Benchtop Digital Multimeter Steps: button and then select [Trg Src] → [Single], or press 1) Press button to turn single trigger function on directly as Figure 2-38. Figure 2-38 Setting interface of single trigger 2) Select [Delay] to set the delay to be auto or manual mode.

  • Page 34: Help System

    UT8805E Benchtop Digital Multimeter 2.7 Help System UT8805E comes with a powerful help system, which can call out needed help information during measurement. Build-in help system provides relevant help for front panel buttons, soft keys and common operation. Press button, then press button to enter built-in help menu as Figure 2-40.

  • Page 35: Mathematical Functions

    UT8805E Benchtop Digital Multimeter 2.8 Mathematical Functions 5 main functions are included in mathematical operation: statistics, limits, dB, relative operation and dBm. Different mathematical function satisfies different measuring requirements, which is suitable for voltage, current, resistance, capacitance, frequency/cycle and temperature measurements. The dB and dBm operations are only suitable for voltage measurement.

  • Page 36: Statistics Operation

    UT8805E Benchtop Digital Multimeter 2.8.1 Statistics Operation Statistics operation can be applied to measure the minimum, maximum, average, standard deviation of reading during the measurements of DC/AC voltage, DC/AC current, resistance, frequency, cycle, capacitance and temperature. → [Stat] → [On] to enter the interface of Figure 2-42.

  • Page 37: Limit Operation

    UT8805E Benchtop Digital Multimeter 2.8.2 Limit Operation The limit operation can indicate the over-range signal base on the set high/low limit, which includes the measurements of DC/AC voltage, DC/AC current, resistance, frequency, cycle, capacitance and temperature. → [Limit] → [On] to enter the interface of Figure 2-43.

  • Page 38: The Dbm Operation

    UT8805E Benchtop Digital Multimeter 2.8.3 The dBm Operation dBm is an decibel unit represents the absolute value of power, and is relative to 1mW. The dBm operation is to work out the power of reference resistance by measured voltage. The dBm operation is only suitable for AC/DC voltage measurement.

  • Page 39: The Relative Operation

    UT8805E Benchtop Digital Multimeter ~ 8000Ω dB Rel Set the relative value of dB Done Save current settings and return to previous menu The operating method of dB In dB operation, the instrument will work out the dBm value of next reading, and count the deference between this dBm value and the saved set dB value, as formula shown below: dB = 10xLog10 [(Reading2/RREF)/0.001W] - dB relative value...

  • Page 40: Display Format

    UT8805E Benchtop Digital Multimeter 2.9 Display Format 3 kinds of display formats are supported by UT8805E. User can check the measured data by number, bar chart, trend chart, and histogram. 2.9.1 Number Press to enter the display function menu, press [Display] to enter the interface below. The number display format is enabled by default.

  • Page 41: Trend Chart

    UT8805E Benchtop Digital Multimeter 2.9.3 Trend Chart Steps: 1) Select [Trend] to enable trend chart display format. Figure 2-49 Trend chart display format Menu of trend chart display function Function menu Description Display Trend The current display format is trend chart...
  • Page 42 UT8805E Benchtop Digital Multimeter Figure 2-51 Histogram display format Histogram display function menu Function menu Description Display Histo The current display format is histogram Autoscale Once Set vertical scale automatically once Setting Set histogram manually Clear Clear current reading and restart the statistics...

  • Page 43: Enabled Trigger

    Clear all the history data on list 2.9.9 Storage Management UT8805E built-in 1GB Nand Flash memory and external U-disk can be used to save and read the data. The location, name and format of files are configurable in storage management menu.

  • Page 44: Chapter 3 Practical Cases

    Select the storage location by direction buttons Type Select the type of file, .CFG is configuration file, and .CSV is data file Read Read .CFG file to configure UT8805E Save Save in selected type and input the names of file by direction buttons Erase...

  • Page 45: Elimination Of Test Leads Impedance Error

    UT8805E Benchtop Digital Multimeter 3.2 Elimination of Test Leads Impedance Error Relative operation is recommended in low resistance measurement, which can eliminate the test lead impedance error. Steps: Press button to choose 2-wire resistance measurement. Connect the ends of test lead with the multimeter. Connect the red test lead to terminal Input-HI and the black one to terminal Input-LO.

  • Page 46: Db Measurement

    UT8805E Benchtop Digital Multimeter 3.4 dB Measurement The dB value is a common measurement unit in the areas of electronic, wireless, mechanics, impact vibration, mechanics power and acoustic. The power difference between circuits (dB value) can be measured by following steps: Method 1 Measure dBm1 &...

  • Page 47: Hold Measurement

    Thermocouple is common temperature sensor. The type, voltage and the cold junction temperature of thermocouple is required in thermocouple measurement. With a built-in temperature sensor, UT8805E is able to measure the temperature (cold junction temperature) near the terminal HI and terminal LO.
  • Page 48 UT8805E Benchtop Digital Multimeter Setting] → [Probe] → [TCouple], and then select [K type] in [Type]. The interface is shown below. Figure 3-12 K-type thermocouple temperature measurement Return to the previous menu, select [Probe] → [Unit] to set the unit to be °C, then the measured value will be displayed.

  • Page 49: Chapter 4 Measurement Guide

    RMS value square of the voltage on resistor, which has nothing to do with waveform. UT8805E can accurately measure the true RMS value of voltage or current waveform when its energy outside the effective bandwidth of the multimeter can be ignored.

  • Page 50: Load Error (Ac Voltage)

    + 0.08% of range Load Error (AC Voltage) In AC voltage measurement, the input impedance of UT8805E is 1MΩ, and resistor is in parallel to 100PF capacitors. The multimeter test lead also will introduce some capacitance and load. Table 4-2 shows the approximate input resistance of the multimeter at various frequencies.

  • Page 51: Chapter 5 Trouble Shooting

    Check whether the input power supply fuse on back panel is fused. If it has been fused, please replace it as required. Restart the instrument after the above inspections. If you still cannot use this product normally, please contact UNI-T and let us help you.  Reading remains with current signal Inserted Check whether the test leads are inserted into the terminals correctly.

  • Page 52: Chapter 6 Appendix

    A CD Note: The length of the USB data cable and network cable of product shall be less than 3m, or the performance may be affected. Please order accessories from local UNI-T office. Appendix B: Warranty Uni-Trend guarantees that the product is free from any defect in material and workmanship within 3 years from the purchase date.

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