UNI-T UT8806E User Manual
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UNI-T UT8806E User Manual

UNI-T UT8806E User Manual

Desktop digital multimeter
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UT8806E Desktop Digital Multimeter

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Summary of Contents for UNI-T UT8806E

  • Page 1 User’s Manual UT8806E Desktop Digital Multimeter...
  • Page 2 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 UNI-T, pay the shipping cost, and provide a copy of the purchase receipt of the original purchaser. If the products is shipped domestically to the purchase receipt of the original purchaser.

  • Page 4: General Safety Summary

    Do Not Operate with Suspected Failures. If you suspect that this product is malfunctioning, contact UNI-T's authorized service personnel for testing. Any maintenance, adjustment, or replacement of parts on this product must be performed by UNI-T authorized service personnel. Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present.
  • Page 5 IEC Measurement Category II Overvoltage Protection To avoid the risk of electric shock, the UT8806E digital multimeter provides overvoltage protection for electric mains connections that meet both of the following conditions. 1. The HI and LO input terminals are connected to the electric mains under Measurement Category II conditions (described below).

  • Page 6: Safety Term And Symbol

    The HI and LO input terminals are connected to the electric mains (up to 300VAC) in these devices, or to branch circuit socket. However, the HI and LO input terminals of the UT8806E cannot be connected to the electric mains in permanently installed electrical devices, such as main breaker panels, sub-panel breakout boxes, or permanently wired motors.
  • Page 7 User’s Manual UT8806E Desktop Digital Multimeter Grounding Measurement grounding terminal Standby power supply: when the power switch is turned off, Power this device is not completely disconnected from the AC power Supply supply. Secondary electrical circuit connected to wall sockets through transformers...

  • Page 8: Ut8806E Introduction

    UT8806E Desktop Digital Multimeter UT8806E Introduction The UT8806E is a 6½ -digit desktop digital multimeter with a maximum display of 2,000,000, featuring high accuracy, versatility, and full automation. In addition to the most basic measurements, it has various mathematical operation function, and supports capacitance, temperature and other measurements.

  • Page 9: About This Manual

    User’s Manual UT8806E Desktop Digital Multimeter About this Manual This manual provides information on the operation of the UT8806E digital multimeter and includes the following chapters. Chapter 1 Quick Guide This chapter is to guide you through the front/rear panel and user interface and get the UT8806E digital multimeter ready.

  • Page 10: Table Of Contents

    User’s Manual UT8806E Desktop Digital Multimeter Table of Contents Copyright and Statement ..................2 General Safety Summary ..................4 Safety Term and Symbol ..................6 UT8806E Introduction .................... 8 About this Manual ....................9 Chapter 1 Quick Gide ....................1 General Inspection ..................
  • Page 11 Example 7 Thermocouple Setting and Measurement ........89 Chapter 5 Troubleshooting ..................91 Chapter 6 Appendix ....................92 Appendix A UT8806E Accessories ..............92 Appendix B Warranty Overview ..............92 Appendix C Maintenance and Cleaning ............92 Appendix D Contact Us .................. 93 Instruments.uni-trend.com...

  • Page 12: Chapter 1 Quick Gide

    Chapter 1 Quick Gide This chapter is to introduce the preparation of the UT8806E digital multimeter and simply introduce the front/rear panel and display screen.  General Inspection  Adjusting Handle  External Dimension  Front Panel  Rear Panel ...

  • Page 13: General Inspection

    The details of the supplied accessories are described in Appendix A in Chapter 6 of this manual. You can refer to these instructions to check for missing accessories. If you find that an accessory is missing or damaged, contact the UNI-T distributor responsible for your business or the local UNI-T office.

  • Page 14: Adjusting Handle

    User’s Manual UT8806E Desktop Digital Multimeter Adjusting Handle The multimeter’s handle can adjust to three positions by appropriate strengths, as shown in Figure 1-1, 1-2 and 1-3. Figure 1-1 Adjusting Handle Figure 1-2 Holding Down Position Figure 1-3 Moving Position...

  • Page 15: Front Panel

    UT8806E Desktop Digital Multimeter Front Panel The UT8806E digital multimeter provides the user with a simple and clear front panel. These controls are displayed in logical groupings, and basic operations can be performed by simply selecting the appropriate button, as shown in Figure 1-5.
  • Page 16 User’s Manual UT8806E Desktop Digital Multimeter voltage measurement or AC current measurement (secondary function) 2-wire impedance measurement or 4-wire impedance measurement (secondary function) Capacitance measurement or match with probe temperature measurement (secondary function) Continuity measurement or diode measurement (secondary function)

  • Page 17: Rear Panel

    User’s Manual UT8806E Desktop Digital Multimeter Rear Panel The rear panel of the UT8806E digital multimeter provides multiple ports, including USB Device, RS-232C, LAN and GPIB (option) as shown in Figure 1-6. Figure 0–2 Rear Panel 1：Power Input Port This multimeter can input four sizes of AC power. Use the power cord provided with the accessory to connect AC power to the multimeter through this jack.
  • Page 18 For the specific settings, please refer to Chapter 2 Panel Operation-Auxiliary System Functions-I/O Port Configuration. 6：VMC Signal Output Port The UT8806E outputs a pulse with a width of about 1μs and an amplitude of 5V from this port every time it completes a sampling. 7：Ext TRIG Signal Input Port The UT8806E supports external trigger switching, including the rising edge, falling edge and level trigger.

  • Page 19: Power On

    Insert the key along with the vertical direction to the lock hole on the rear panel and clockwise rotation to lock the digital multimeter and then plug out the key. 10：Ground Terminal Ground the outer shell of UT8806E multimeter through a metal wire. Power On Please follow the following steps to turning power on.

  • Page 20: Built-In Help

    User’s Manual UT8806E Desktop Digital Multimeter Dual Display Figure 0–4 Dual Display Built-in Help If you need to get the built-in help information of this product, press [Shift] + [Acquire] to enter the help system at first, then press the arrow keys to select the desired help item, and finally press [OK] to view the corresponding help information.

  • Page 21: Chapter 2 Panel Operation

    User’s Manual UT8806E Desktop Digital Multimeter Chapter 2 Panel Operation This chapter is to introduce how to use various functions and operations of multimeter on the front panel.  Measurement Configuration  Basic Measurement  Auxiliary System Function  Sampling Setting ...

  • Page 22: Range Selecting

    User’s Manual UT8806E Desktop Digital Multimeter The default measurement configuration of the multimeter ensures accurate measurement results in most cases. The user can directly carry out any measurement operation or modify the measurement parameters under various measurement functions as needed.
  • Page 23 User’s Manual UT8806E Desktop Digital Multimeter Range increasing, automatic range will be disabled Automatic range Range decreasing, automatic range will be disabled Figure 0–1 Selection Key on the Front Panel Method 1 Select the range by using the function key on the front panel...

  • Page 24: Integral Time Time And Resolution

    DCV, DCI, 2WR and 4WR measurement functions. The UT8806E sets the integral time in terms of the number of power cycles, and the unit is PLC. The default integral time of the multimeter at power-on is 10 PLC, and the user can manually select the integral time with 0.006 PLC, 0.02 PLC, 0.06 PLC, 0.2 PLC, 1 PLC, 10 PLC,...
  • Page 25 User’s Manual UT8806E Desktop Digital Multimeter The reading resolution of the UT8806E can be , or bits. The multimeter automatically selects the reading resolution according to the current measurement settings. For DCV, DCI and OHM measurement, select [Integral time] in the menu to see the setting options as shown in Figure 2-3 (taking DCV measurement as an example).

  • Page 26: Input Impedance

    User’s Manual UT8806E Desktop Digital Multimeter 4. For CAP measurement, the resolution is fixed at bit. 5. For CONT measurement, it always displayed to 2 decimal places. 6. For DIODE measurement, the resolution is fixed at bit. 7. For TEMP measurement, the resolution is fixed at bit.

  • Page 27: Automatic Zeroing

    User’s Manual UT8806E Desktop Digital Multimeter Automatic Zeroing Auto Zero is applicable to DCV, DCI, 2WR and 4WR measurement functions. After entering the measurement function, press the Menu key to set [Auto Zero] in the menu, as shown in Figure 2-5 (taking DCV measurement as an example).

  • Page 28: Low-Frequency Filter

    Low-frequency Filter The low-frequency filter is applicable to ACV, ACI measurements. The low-frequency filter will optimize the low-frequency accuracy and minimize the AC stabilization time. The UT8806E multimeter provides three kinds of low-frequency filters, >3Hz, >20Hz and >200Hz. During the measurement, the user should select the AC filter according to the frequency of the input signal.

  • Page 29: Short-Circuit Resistance

    User’s Manual UT8806E Desktop Digital Multimeter Short-circuit Resistance During the CONT measurement, the short-circuit resistance value should be set in the test circuit. When the resistance value of the measured resistor in the circuit is lower than the short-circuit resistance value, the circuit is judged to be connected and beeper will sound an audible alarm (if the beeper is turned on).

  • Page 30: Diode Break-Over Voltage

    User’s Manual UT8806E Desktop Digital Multimeter Diode Break-over Voltage For the diode conduction measurement, it is necessary to set the break-over voltage in the test circuit. When the on-state voltage value of the diode in the circuit under test is lower than the set value, the instrument continuously emits a beep tone (if the beeper is turned on).

  • Page 31: Basic Measurement

     Temperature Measurement DC Voltage Measurement The UT8806E can measure DC voltage up to 1000V. The DC voltage measurement function is selected by default after powering on, and the connection and measurement method of DC voltage will be described in detail below.
  • Page 32 User’s Manual UT8806E Desktop Digital Multimeter Figure 0–11 Measuring Connection of DC Voltage 3. Select the appropriate range according to the size of the input DC voltage. The user can press [Range] to select a measuring range or use the front panel keys to quickly select a range.

  • Page 33: Dc Current Measurement

    Before the voltage signal is connected, the multimeter input jacks are left open and random readings within ±20V will occur. DC Current Measurement The UT8806E can measure DC current up to 10A. The connection and measurement method of DC current will be described in detail below. Operation Steps...
  • Page 34 User’s Manual UT8806E Desktop Digital Multimeter Figure 0–12 DC Current Measurement Menu 2. As shown in Figure 0–11, connect the multimeter to the test circuit. When the current is small, the red test lead is connected to the mA input terminal and the black test lead is connected to the Input-LO input terminal.

  • Page 35: Ac Voltage Measurement

    “Digital”, “Bar”, “Tendency” and “Histogram” figures. Please refer to the section "Display Mode" for details. AC Voltage Measurement The UT8806E can measure AC voltage up to 750V. The connection and measurement method of AC voltage will be described in detail below. Instruments.uni-trend.com...
  • Page 36 User’s Manual UT8806E Desktop Digital Multimeter Operation Steps 1. Press the key on the front panel to enter the AC voltage measurement menu, as shown in Figure 0–14. Figure 0–14 AC Voltage Measurement Menu 2. As shown in Figure 2–15, connect the test leads to the voltage to be measured, the red test lead to the “HI”...
  • Page 37  Input protection of 750Vrms is for every range. 4. Set the filter Press the [Filter] to configure an appropriate filter for measurement. The UT8806E provides three kinds of filter, “>3Hz, >20Hz and >200Hz”. Normally, the user should select the highest frequency filter whose frequency is less than the frequency of the measurement signal.

  • Page 38: Ac Current Measurement

    “Digital”, “Bar”, “Tendency” and “Histogram” figures. Please refer to the section "Display Mode" for details. AC Current Measurement The UT8806E can measure AC current up to 10A. The connection and measurement method of DC current will be described in detail below. Operation Steps 1.
  • Page 39  Except 10A, all ranges are allowed to over range by 20%.  “OL” will be displayed when the input exceeds the maximum range. Set the filter Press the [Filter] to configure an appropriate filter for measurement. The UT8806E Instruments.uni-trend.com 28 / 104...
  • Page 40 “Digital”, “Bar”, “Tendency” and “Histogram” figures. Please refer to the section "Display Mode" for details. Resistance Measurement The UT8806E provides two kind of resistance measurement, 2-wire and 4-wire. The connection and resistance measurement method of 2-wire and 4-wire will be described in detail below.

  • Page 41: 2-Wire Resistance Measurement

    User’s Manual UT8806E Desktop Digital Multimeter 2-wire Resistance Measurement Operation Steps 1. Press the key on the front panel to enter 2-wire resistance measurement menu, as shown in Figure 0–20. Figure 0–21 2-wire Resistance Measurement Menu 2. As shown in Figure 0–22, connect the test leads to the resistance to be measured, the red test lead to the “HI”...
  • Page 42 User’s Manual UT8806E Desktop Digital Multimeter 3. Select the appropriate current range according to the size of the resistance to be measured. The user can press [Range] to select a measuring range or use the front panel keys quickly select a range. The automatic range automatically selects a range for the measurement based on the input.

  • Page 43: 4-Wire Resistance Measurement

    User’s Manual UT8806E Desktop Digital Multimeter 7. Set the relative value Turn on or off the relative operation function. When the relative operation is turned on, the displayed number is the actual measured value minus the set relative value. (For details on how to set the relative value, refer to the section “Mathematical Operation Function”...
  • Page 44 User’s Manual UT8806E Desktop Digital Multimeter Figure 0–25 4-wire Resistance Measurement Menu 2. As shown in Figure 0–23, connect the test lead to the resistance to be measured. The red test lead is connected to the input jack "HI" end, the black test lead is connected to the input jack "LO"...
  • Page 45 User’s Manual UT8806E Desktop Digital Multimeter Table 0-8 Scale* 20Ω, 200Ω, 2kΩ, 20kΩ, 200kΩ, 2mΩ Open-circuit <8V voltage All scales are DC 1000V or AC 750Vrms (Hi end) Input All scales are DC 200V (Sense HI end and Sense LO...

  • Page 46: Capacitance Measurement

     Four-wire resistance measurements will give random readings if the inputs are dangling. Capacitance Measurement The UT8806E can measure capacitance up to 100mF. The connection and measurement method of capacitance will be described in detail below. Operation Steps...
  • Page 47 User’s Manual UT8806E Desktop Digital Multimeter Figure 0–29 Measuring Connection of Capacitance Measurement 3. Select the appropriate range according to the size of the capacitance to be measured. The user can press [Range] to select a measuring range or use the front panel keys quickly select a range.

  • Page 48: Frequency Measurement

    User’s Manual UT8806E Desktop Digital Multimeter Read the measured results The refresh rate of measured value is depending on the measured capacitance value. Graphical display The user can change the display mode of the measured data through [Display], and there are four display modes, “Digital”, “Bar”, “Tendency”...
  • Page 49 User’s Manual UT8806E Desktop Digital Multimeter 2. As shown in Figure 0–27, connect the test leads to the signal to be measured, the red test lead to the “Input-HI” terminal and the black test lead to the “Input-LO” terminal. Figure 0–31 Measuring Connection of Signal Frequency 3.

  • Page 50: Signal Period Measurement

    User’s Manual UT8806E Desktop Digital Multimeter 6. Read the measured results The reading rate of a frequency measurement depends on the frequency level of the signal being measured. The multimeter displays the current measurement and the result on the screen.
  • Page 51 User’s Manual UT8806E Desktop Digital Multimeter 2. As shown in Figure 0–28, connect the test leads to the signal to be measured, the red test lead to the “Input-HI” terminal and the black test lead to the “Input-LO” terminal. Figure 0–33 Measuring Connection of Signal Period 3.

  • Page 52: Continuity Measurement

    (if the beeper is turned on). The following section describes how to use the UT8806E multimeter to perform a continuity test on a circuit. Test Steps 1.
  • Page 53 User’s Manual UT8806E Desktop Digital Multimeter Figure 0–35 Measuring Connection of Continuity Measurement 3. Set short-circuit resistance (threshold) The default value of the short-circuit resistance is 30Ω, which is set at the factory. The short-circuit resistance can be set by using the arrow keys. The user can directly carry out the continuity test.

  • Page 54: Diode Measurement

    The diode test measures the break-over voltage of the circuit under test with a current of approximately 1mA by using the 2-wire method. The following section describes how to use the UT8806E multimeter to perform a diode test on a circuit. Test Steps 1.
  • Page 55 User’s Manual UT8806E Desktop Digital Multimeter 2. As shown in Figure 0–33, connect the test leads and the circuit under test, the red test lead to the “Input-HI” terminal and the black test lead to the “Input-LO” terminal. Figure 0–38 Measuring Connection of Diode Measurement...

  • Page 56: Temperature Measurement

    Before testing the on-off circuit, please disconnect the circuit power and discharge the high voltage capacitor to avoid damaging the multimeter. Temperature Measurement UT8806E multimeter supports two kind of temperature measurement, thermocouple and thermal resistance. The connection and measurement of temperature will be described in detail below.
  • Page 57 UT8806E Desktop Digital Multimeter 3. Select temperature probe Press the [Probe] to select the desired probe, UT8806E supports 2-wire RTD, 4-wire RTD, 2-wire thermistor, 4-wire thermistor and thermocouple. RTD's R0 value defaults to 100 ohms, which can be selected and entered into the menu and then manually modified.

  • Page 58: Auxiliary System Function

    User’s Manual UT8806E Desktop Digital Multimeter Auxiliary System Function In the auxiliary system menu, the user can set the system parameters of the multimeter. Press the key, and then press the key to enter the operation menu of the auxiliary system function, as shown in Figure 2-36.

  • Page 59: Storage And Restore

    User’s Manual UT8806E Desktop Digital Multimeter Storage and Restore The UT8806E multimeter supports storing and restoring settings for instrument parameter files and data files in the local storage and external USB storage devices. Press the key and then press key to enter the storage and restore menu, as shown in Figure 2-37.
  • Page 60 User’s Manual UT8806E Desktop Digital Multimeter Data Storage The user can store the configuration file (corresponding to SYS CFGItem), data file (corresponding to MEAS CSVItem) or image file (corresponding to SHOT BMPItem) in the internal storage or external USB storage device.
  • Page 61 User’s Manual UT8806E Desktop Digital Multimeter Default Setting After entering the storage and restore menu, press the [Default] to restore the current settings to the factory defaults. Table 0-16 Default Setting Item Function Default Setting Default measurement DC voltage measurement...

  • Page 62: Management File

    User’s Manual UT8806E Desktop Digital Multimeter Management File The UT8806E multimeter supports manage the file store in local and external. The user can execute the management file function, such as save screen files, delete, copy and format the file. Press the...

  • Page 63: I/O Configuration

     Format The UT8806E only supports format the local storage. Press the [Shift] + [Math] key on the front panel to enter the management file menu, as shown in Figure 2-40. Select the internal storage device (I:/);...
  • Page 64 User’s Manual UT8806E Desktop Digital Multimeter Figure 0–47 LAN Setting Menu Table 0-17 LAN Parameter Function Menu Description DHCP Dynamic host computer, which can select on or off IP address Set the IP address Subnet mask Set the subnet mask...

  • Page 65: Self-Inspection

    User’s Manual UT8806E Desktop Digital Multimeter Table 0-18 RS-232C Parameter Function Menu Set Value Description 2400, 4800, 9600, 19200, Set the baud rate for RS-232C 38400, 56000, 57600, 115200, Baud rate operation 128000, 256000 no parity check, odd parity Set the parity bit for RS-232C...

  • Page 66: System Setting

    User’s Manual UT8806E Desktop Digital Multimeter System Setting Press the key and then press the key, select [System Setting] to enter the system setting menu, as shown in Figure 2-44. Figure 0–49 System Setting Menu Table 0-19 System Setting Function...
  • Page 67 User’s Manual UT8806E Desktop Digital Multimeter Press the [Beeper] key to turn on/off this function. The instrument emits a 2 kHz beep when the beeper is turned on and the continuity measurement is enabled. 3. Display setting Adjust the drive current of the display backlight.

  • Page 68: Firmware Update

    User’s Manual UT8806E Desktop Digital Multimeter Firmware Update The UT8806E supports the firmware update via USB, it can update the current software to the newest version. Operation Steps Copy the update file package to a USB. 2. Insert the USB into the USB Host port on the front panel of the multimeter.

  • Page 69: Sampling Setting

    User’s Manual UT8806E Desktop Digital Multimeter Sampling Setting Sampling is the process of taking signals at regular intervals and digitizing them. The trigger modes available for this multimeter include auto trigger, single trigger, and external trigger. Press the key to enter the sampling setting menu, as shown in Figure 2-46.

  • Page 70: Automatic Trigger

    User’s Manual UT8806E Desktop Digital Multimeter Automatic Trigger The automatic trigger setting includes delay, sampling count/trigger and VMC output. Operation Steps 1. Press the key, and select [Trigger Source] → [Auto], or directly press the on the front panel to enable the automatic trigger function.

  • Page 71: Single Trigger

    User’s Manual UT8806E Desktop Digital Multimeter Single Trigger The single trigger setting includes delay, sampling count/trigger and VMC output. Operation Steps 1. Press the key, and select [Trigger Source] → [Single], or directly press the key on the front panel to enable the single trigger function, as shown in Figure 2-47.

  • Page 72: External Trigger

    User’s Manual UT8806E Desktop Digital Multimeter External Trigger The external trigger signal is accessed through the EXT TRIG pin on the rear panel (see the rear panel of the instrument for details). The external trigger setting includes delay, sampling count, slope and VMC output. The completed signal is output from the VMC terminal.

  • Page 73: Enable Trigger

    User’s Manual UT8806E Desktop Digital Multimeter Enable Trigger The UT8806E has two kind of trigger mode, automatic trigger and single trigger, it can be enabled by pressing the keys on the front panel. The default mode is automatic trigger when the multimeter has powered on.
  • Page 74 User’s Manual UT8806E Desktop Digital Multimeter Table 0-21 Help System Function Menu Description Move the cursor up to select the help menu Move the cursor down to select Down the help menu Return Return to the previous menu 1. Basic Measurement The way to obtain measurement type and measuring connection.

  • Page 75: Mathematical Operation

    User’s Manual UT8806E Desktop Digital Multimeter Mathematical Operation Mathematical operation consists of five main functions, statistics, limit value, dB, dBm, and relative operations. The Mathematical operation functions are available for voltage, current, resistance, capacitance, frequency/period, and temperature measurements, where dB and dBm operations are available for voltage measurements only.

  • Page 76: Statistical Operation

    User’s Manual UT8806E Desktop Digital Multimeter  If the measurement function is changed, mathematical operations are automatically switched off, except statistics. Statistical Operation The statistical operations are used to count the minimum, maximum, average, and variance of readings during a measurement. The statistical operation can perform on the measurement...

  • Page 77: Limits Operation

    User’s Manual UT8806E Desktop Digital Multimeter Delete Delete all current readings and restart counting Save all the changes and return to the previous Return menu Methods for Statistical Operations  When statistical operations are enabled, the first reading of the multimeter is displayed as the maximum or minimum value.
  • Page 78 User’s Manual UT8806E Desktop Digital Multimeter Lower limit Set the upper limit of the specified range When the beeper is turned on, it will sound an audible Beeper ON/OFF alarm if the reading exceeds the set limit Delete Delete the current state and restart counting...

  • Page 79: Dbm Operation

    User’s Manual UT8806E Desktop Digital Multimeter Calibration After the calibration function is enabled, select dBm operation or dB operation through the [Function] key. dBm Operation dBm is a decibel unit with respect to 1 mW, it represents the absolute value of the power value.

  • Page 80: Db Operation

    User’s Manual UT8806E Desktop Digital Multimeter is voltage measurement value. is the reference resistor. dB Operation dB indicates a relative value, which used to the relative operation for dBm. dB operations are only applicable to DC voltage and AC voltage measurements.

  • Page 81: Relative Operation

    User’s Manual UT8806E Desktop Digital Multimeter Method for dB operation When dB operation is enabled, the instrument calculates the dBm value for the next reading and differs this dBm value from the stored dB setting as shown in the following equation.

  • Page 82: Dual Display

    Dual Display The dual display function can display the primary measurement value and the secondary measurement value or the subsidiary value at the same time. When using the UT8806E, press the key to call up the dual display function. The UT8806E supports the following dual display combinations.

  • Page 83: Display Mode

    User’s Manual UT8806E Desktop Digital Multimeter  If the primary display utilizes a mathematical operation such as statistics, limits, relative, the primary display still displays the results of the mathematical operation when the secondary display is turned on.  If the main display uses mathematical operation such as dB, dBm, the primary display will automatically quit the mathematical operation when the secondary display is turned on.

  • Page 84: Bar Figure

    User’s Manual UT8806E Desktop Digital Multimeter Figure 0–62 Digital Display Mode Table 0-29 Display Mode Function Setting Description Menu Display Select display mode Prompt ON/OFF Turn on/off Prompt Prompt prompt Content content Bar Figure Operation Steps 1. Press the [Bar] key to enter the bar figure display mode.

  • Page 85: Tendency Figure

    User’s Manual UT8806E Desktop Digital Multimeter 2. Press the [Scale] to select the horizontal scale to default or manual (limits function is enabled). Table 0-30 Manual Setting of Horizontal Scale in Bar Figure Function Menu Description Set the upper limit for the...

  • Page 86: Histogram Figure

    User’s Manual UT8806E Desktop Digital Multimeter Figure 0-65 Manual Display in Tendency Mode Table 0-31 Manual Setting of Horizontal Scale in Tendency Figure Function Menu Description Set the high level, low level, middle value and the Setting range for the horizontal scale...
  • Page 87 User’s Manual UT8806E Desktop Digital Multimeter Table 0-32 Histogram Mode Function Menu Setting Description Histogram Set the display mode to histogram figure Figure Set the histogram number, horizontal scale Scale Auto/Manual for the histogram figure Coordinate ON/OFF Turn on/off the coordinate display...

  • Page 88: Hold Measurement

    User’s Manual UT8806E Desktop Digital Multimeter Range Set the range for the horizontal scale External Display or hide the additional histograms, it ON/OFF indicates the reading out of the histogram range Save all the changes, and return to the previous...

  • Page 89: Chapter 3 Measurement Guide

    User’s Manual UT8806E Desktop Digital Multimeter Chapter 3 Measurement Guide This chapter provides information on how to eliminate the possible errors in measurement to obtain accurate measured results.  Load Error (DC-Voltage)  True RMS AC Measurement  Crest Factor Error (non-sine wave input) ...

  • Page 90: True Rms Ac Measurement

    UT8806E Desktop Digital Multimeter True RMS AC Measurement The AC measurement of the UT8806E has a true RMS response. The average heating power of a resistor over a period of time is proportional to the square of the RMS of the voltage applied to the resistor over that period of time, and is independent of the waveform.
  • Page 91 User’s Manual UT8806E Desktop Digital Multimeter Crest Factor Error (non-sine wave input) It is a common misconception that “Since the multimeter can measure the true effective value of the signal, its sine wave accuracy index can naturally be applied to other waveform input signals.”...

  • Page 92: Load Error (Ac-Voltage)

    UT8806E Desktop Digital Multimeter Load Error (AC-Voltage) When using the AC voltage measurement function, the UT8806E's input impedance is a 1 MΩ resistor in parallel with a 100 pF capacitor. The multimeter test leads also introduce some capacitance and load. The approximate input resistance of the multimeter at various frequencies, as shown in Table 3-2.

  • Page 93: Chapter 4 Applications

    User’s Manual UT8806E Desktop Digital Multimeter Chapter 4 Applications This chapter provides detailed information on using the UT8806E to make electrical measurements.  Example 1 Reading Statistics  Example 2 Eliminate Test Lead Impedance Error  Example 3 dBm Measurement ...

  • Page 94: Example 2 Eliminate Test Lead Impedance Error

    User’s Manual UT8806E Desktop Digital Multimeter Figure 0–70 DCV Reading Statistics Menu 1 Figure 0–71 DCV Reading Statistics Menu 2 Example 2 Eliminate Test Lead Impedance Error The impedance of the test leads causes a large deviation in the measurement when measuring resistors with small resistance values.

  • Page 95: Example 3 Dbm Measurement

    User’s Manual UT8806E Desktop Digital Multimeter 4. Short-circuit connect the two test leads and the screen displays the lead impedance, as shown in Figure 4-3. Figure 0–72 Reading of Test Wire Short-circuit Set the parameter for relative operation. Press → [Relative Value] and use the arrow keys to set the parameter for the relative operation.

  • Page 96: Example 4Db Measurement

    User’s Manual UT8806E Desktop Digital Multimeter 1. Press the key on the front panel to turn on the AC voltage measurement and select the appropriate voltage scale. 2. Connect one end of the test lead to the multimeter, the red test lead to the Input-HI terminal and the black test lead to the Input-LO terminal, as shown in Figure 2-15.

  • Page 97: Example 5 Limits Measurement

    User’s Manual UT8806E Desktop Digital Multimeter 4. Press → [Calibration] →[Function]→[dB ON] to select the dB function, and use the arrow keys to set the dB relative value (dBm2). In this case, the screen display the reading is the power difference between two circuits.
  • Page 98 User’s Manual UT8806E Desktop Digital Multimeter Figure 0–76 ACV Lower Limit Setting Menu Press the [Upper] to set the upper limit for the limits measurement. Figure 0–77 ACV Upper Limit Setting Menu 4. Turn on the limit test function and turn on the beeper, as shown in figure above. The measured value is between the set limits, so the limit test status is “Pass”.

  • Page 99: Example 6 Hold Measurement

    User’s Manual UT8806E Desktop Digital Multimeter Example 6 Hold Measurement The Hold measurement feature allows the user to obtain a steady reading that remains on the front panel display. The reading remains on the screen when the test pencil is removed. The following section describes how to hold the reading on the screen.

  • Page 100: Example 7 Thermocouple Setting And Measurement

    The UT8806E has a built-in temperature sensor for measuring the temperature near the HI terminal and LO terminal (cold end temperature). When thermocouple temperature measurement is performed, the multimeter automatically measures the cold end temperature and calculates the absolute temperature of the hot end according to the cold end temperature.
  • Page 101 User’s Manual UT8806E Desktop Digital Multimeter Press the key, [Dual Display] → [Reference Temperature] or [Sensor], it can display the measured temperature and temperature of reference sensor. Figure 0–82 Dual Display of Temperature Measurement Menu 1 Figure 0–83 Dual Display of Temperature Measurement Menu 2 Instruments.uni-trend.com...

  • Page 102: Chapter 5 Troubleshooting

    (3) Check if the fuse of the power input on the rear panel is fusing. If it is fusing, replace the fuse as required. (4) After making the above checks, restart the instrument. (5) If the product still does not work properly, contact the UNI-T Service Center for assistance. When connect a current signal, no change in reading.

  • Page 103: Chapter 6 Appendix

    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 104: Appendix D Contact Us

    User’s Manual UT8806E Desktop Digital Multimeter (2) Cleaning Check the instrument frequently according to the operating condition. Follow these steps to clean the external surface of the instrument: a) Please use a soft cloth to wipe the dust outside the instrument.

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