Related Manuals for Tonghui U822
Summary of Contents for Tonghui U822
- Page 1 OPERATION MANUAL U822/U822A/U822C Handheld LCR Meter EUCOL ELECTRONIC TECHNOLOGY CO.,LTD. WWW.EUCOL.COM.CN...
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Page 3: Table Of Contents
U822 Series Operation Manual Contents Safety Summary..............................3 Safety Guidelines..............................3 Introduction ................................4 Package Contents..............................4 Front Panel Overview ............................5 Front Panel Buttons ................................5 Button Function Definition..............................6 LCD Display Overview ................................6 LCD Display Descriptions ..............................6 Special Display Indicators..............................7 Test Port ....................................7... - Page 4 U822 Series Operation Manual Cleaning....................................28 Limited Warranty ..............................28...
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Page 5: Safety Summary
U822 Series Operation Manual Safety Summary The following safety precautions are applicable to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. DO NOT OPERATE IN A FLAMMABLE OR EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of much dust, direct sunlight, high humidity, strong electromagnetic radiation, etc. -
Page 6: Introduction
All U822 series are equipped with the function of remote communication. The test data can be transferred to PC through a Mini USB connection, great for applications that require remote control and data acquisition. -
Page 7: Front Panel Overview
NOTE: Internal battery supply will be automatically cut off since the normal supply of external power. If the battery is rechargeable , the external power will charge the battery simultaneously. U822 is installed an independent charging controller---charging control is still done even at the state of power-off. -
Page 8: Button Function Definition
U822 Series Operation Manual Figure 2 –Button Display (Model U822C shown) Button Function Definition 1． Power ON/OFF Button 2． Frequency/Record Mode Button 3． Remote Control/Backlight Button 4． Readings Hold/Utility Menu Button 5． Tolerance mode/ Menu Selection Button 6． Clear/ Menu Selection Button 7．... -
Page 9: Special Display Indicators
Indicates damaged or open fuse AD converter error（UNK） AD converter error（END） Test Port U822 series are creatively designed to combine 2-terminal port, 4-terminal port and 5-terminal port, which makes the convenient test and highly accurate test realized in the instrument. - Page 10 However this configuration has low testing accuracy. For the improvement of accuracy when using external testing leads, U822 series are designed with 5-terminal testing slots and exclusive test fixture to ensure complete external 4-terminal test and measuring accuracy.
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Page 11: Powering Instrument
DC adapter is prior to the battery. The two power modes can be automatically switched without interruption. Installing Battery U822 series can adopt battery for power supply so that you can take measurements whenever and wherever without many preparations. To Install the Battery: 1．... -
Page 12: Battery Capacity Indication
Flas of internal indicates charging state Backlight Display U822 series have Backlight display that can allow you to see the LCD display in dark conditions. To turn on the back light, you should press the button for a long time. -
Page 13: Charge Display
Charge Display U822 series are equipped with rechargeable circuit. When the external power adapter is plugged in, the power mode will automatically switched and the battery power circuit will be cut off. The built-in rechargeable battery will be charged automatically and the power mode will be switched to external power supply. -
Page 14: Operation Instruction
U822 Series Operation Manual Operation Instruction Data hold mode (HOLD) The data hold function allows the user to freeze the display data. The data displayed on LCD will not update upon the phase of test until data hold is turned off. -
Page 15: L/C/R/Z Select Mode
D (Dissipation factor), Q (Quality factor), θ (Phase angle), and ESR (Equivalent series resistance). Test Frequency (FREQ) U822 series handheld LCR meters apply AC signal to DUT for measurement. Frequency is among the main parameters of AC signal. By the presence of component’s non-ideality and distributed parameters, the effect of distributed parameters of test port and test lead, the test frequency used on the same component might cause different test result. -
Page 16: Auto Lcr Mode
U822 Series Operation Manual 4. Test standard implements or components with accurate and reliable measured value. 5. Once the desired measured reading is displayed, press the TOL button once to store the reading as the nominal value. At this point, the “... -
Page 17: Utility Menu (Util)
U822 Series Operation Manual Figure 7-Series and Parallel Equivalent Models of Inductors and Capacitors Appropriate equivalent modes could help to gain better measurement results. Generally, Series mode is better for components with low impedance (blow 100Ω)，while parallel mode for components with high impedance (over 10kΩ). - Page 18 U822 Series Operation Manual Beep Sound Setup (bEEP) The “bEEP” menu option allows the user to enable or disable the beep sound for every key press. NOTE: This option only disables the beep sound for each key press. It does not affect the beep sound for “Tolerance”...
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Page 19: Clear Functions (Clear)
U822 Series Operation Manual Table 4 - Instrument Default Settings Default Setting: NO Settings Default Configuration Primary Function C (capacitance) Secondary Function None (frequency) Configure and Save Power-up State Auto LCR function Procedure to configure and save power-up state Equivalent Method... - Page 20 U822 Series Operation Manual Enter Clear Mode For convenience, open clear and short clear are designed to share a button. By pressing the CLEAR button, the meter will automatically choose either OPEN clear or SHORT clear. Open Clear First select frequency to clear and keep test clip and test slot be open. Enter into clear by the press of CLEAR, and a moment later the OPEN indicator will appear on secondary display after the automatic measurement judging.
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Page 21: Remote Control (Rmt)
U822 Series Operation Manual 6． Connect DUT to start testing after clear. NOTE: 1. Clear data is just temporarily stored in RAM, which means that the data will loss after power-off. Therefore, “clear”, prior to measurement, should be first done after power-on. -
Page 22: Quick Start Guide
U822 Series Operation Manual Quick Start Guide CAUTION • Do not measure a capacitor that is not fully discharged. Connecting a charged or partially charged capacitor to the input terminals will damage the instrument. • When measuring an on-board component within a circuit, the circuit must be powered off before connecting the test leads. -
Page 23: Resistance Measurement
U822 Series Operation Manual 3. Insert a capacitor into test slots or connect a tested capacitor through a proper test accessory (e.g., banana plug-crocodile clip test leads, test fixture or SMD test tweezers). See figure 11 shows the optional 4-terminal test accessories. -
Page 24: Virtual Serial Port Configuration
You can Download the FastAccess PC communication software from our web site (www.eucol.com.cn) for a demo use. Figure 15- Connection to PC Virtual Serial Port Configuration Below is the serial communication configuration of U822 series: • Baudrate：9600 • Data bits： 8 •... - Page 25 U822 Series Operation Manual When the meter is out of remote control, it can be changed to Auto Fetch mode. That is, the meter will automatically send data to the interface bus upon every measurement. Therefore, PC will obtain data by direct reading with no need to send any commands.
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Page 26: Specifications
U822 Series Operation Manual Specifications Below is the general specification and the accuracy specification of U822 series and applicable to U822, U822A, U822C. Declaration: The specifications are subject to change without notice. *NOTE: 120Hz is the rated frequency. The actual frequency is 120.048Hz. -
Page 27: Accuracy Specifications
U822 Series Operation Manual Input 220V(1±10%) 50Hz(1±5%) ： ， AC Adapter Output 12V-15V DC ： Operating Current Max.:28mA (with backlight off) Typical:25mA (@1kHz,100Ωload) Standby(Power Off)Current Max. :2μA(Non-rechargeable) Battery Life 24 Hours (typical) based on backlight off and new fully charged Ni-MH battery Max.: 80min... - Page 28 U822 Series Operation Manual ∼ 1000mH 400.0mH 999.99mH 0.80%+3 0.0080 Parallel ∼ 400mH 40.00mH 399.99mH 0.35%+2 0.0035 Parallel ∼ 40mH 4.000mH 39.999mH 0.1%+2 0.0010 ---- ∼ 400.0uH 3.9999mH 0.30%+2 0.0030 Series ∼ 400μH 40.00uH 399.99μH 0.45%+2 0.0045 Series ∼ 40μH 0.00uH...
- Page 29 U822 Series Operation Manual Impedance （ ） and Phase Angle （ θ ） Accuracy Range Display Range Equi-valent Mode θe ±1.75° Parallel 10MΩ 4.000MΩ∼10.000MΩ 3.00%+5 ±0.75° 4MΩ 400.0kΩ∼3.9999MΩ 1.25%+3 Parallel ±0.25° 400kΩ 40.00kΩ∼399.99kΩ 0.35%+2 Parallel ±0.10° 40kΩ 4.000kΩ∼39.999kΩ 0.1%+2 Parallel ±0.10°...
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Page 30: Maintenance
U822 Series Instruction Manual Maintenance WARNING: Do not perform any service by yourself. Service should only be done by qualified personnel and trained technicians. WARNING: Beware of liquid and residues, especially conductive matter. Service If the instrument fails to power on, first check battery, external source and power sockets and the validity of buttons.
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