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Tonghui Electronics TH2820 Operation Manual

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Summary of Contents for Tonghui Electronics TH2820

  • Page 1 OPERATION MANUAL...
  • Page 2 Caution Keeping on turning on and off the instrument is absolutely forbidden, as this will cause the disorder of the program, which will lead to the loss of the calibrated data and the data saved by users. Note “7.Advanced set” in the setup menu should only be operated by the qualified calibration personnel, therefore, this function is password protected.

  • Page 3: Table Of Contents

    Content Content Caution ...................... 2 Note ......................... 2 Chapter 1 Summary....................... 4 Introduction .......................4 Main features .....................4 Specifications .....................5 Environment.......................6 Chapter 2 Panel Overview ..................... 7 Front Panel ......................7 Rear Panel ......................8 Chapter 3 Operation Illustration....................9 Turning On ......................9 Operation ......................

  • Page 4: Chapter 1 Summary

    When measuring a large number of components with the same nominal value, this function can effectively improve the measuring speed. 4． Comparator Function: TH2820's built-in comparator can sort components into a maximum of four bins (NG, P1, P2 and P3). 5． Equivalent Measurement Circuit:...

  • Page 5: Specifications

    TH2820 LCR METER Specifications Parameters L-Q, C-D, R-Q, Z-Q and Z-D Test Frequency 100Hz, 120Hz and 1kHz Display Digits 5 digits for both primary parameters and secondary parameters 100 Hz, 120 Hz 1 µH – 9.9999 kH 1 kHz 0.1 µH – 999.99 H 100 Hz, 120 Hz 1 pF –...

  • Page 6: Environment

    Chapter 2 Panel Overview Note: Accuracy of D and Q are delta absolute deviations, the rest are delta percent deviations; Suffix with is the actual measured value of this parameter, suffix with is the maximum value, suffix with is the minimum value; Range Range Hold Parameter...

  • Page 7: Chapter 2 Panel Overview

    TH2820 LCR METER Chapter 2 Panel Overview Front Panel TH2820 LCR METER TONGHUI ELECTRONICS SORTING BUZZER PARA FREQ DISP RANGE POWER UNKNOWN SETUP START Figure 2-1 Front panel Following is the description of items 1~9 in Figure 2-1. Name Description Displaying current measured parameters：...

  • Page 8: Rear Panel

    Chapter 2 Panel Overview Rear Panel FUSE INPUT 220V 50Hz Figure 2-2 Rear panel Item Name Description Plate Production date, model and serial number Fuse Holder 1A 250 Vac slow blow fuse. Power Receptacle 220 Vac 50 Hz Table 2-2 Rear Panel Descriptions...

  • Page 9: Chapter 3 Operation Illustration

    Chapter 3 Operation Illustration Chapter 3 Operation Illustration This chapter will introduce how to operate this instrument in details, please read it carefully before operating, in order to avoid any damages to the instrument or dangers to the safety. Turning On a ．...

  • Page 10: Operation

    TH2820 LCR METER Operation Direct function setup —— Parameter, frequency, display and range: a) Press keys to move the cursor and select one of the four direct functions. b) Press keys to select： C s : 0 . 0 0 3 0 p F D : 1 . 0 0 0 0...
  • Page 11 Chapter 3 Operation Illustration First two digits of Current display Previous display digits current value digits 4( B <29 igger first two digits) >32 maller first two digits) Table 3-3 The conversion of display digits B．Display mode —— Direct reading（Dir）, Absolute delta（∆）, Percent delta（∆%） 1．...
  • Page 12 TH2820 LCR METER So more time is taken in range AUTO mode. 3． If a large number of devices under test belong to the same range, the correct range can be locked to raise the measurement speed. For the instrument do not have to take any time to find the correct the range.
  • Page 13 Chapter 3 Operation Illustration Menu 1.Clear “0” 1.1 OPEN 1.2 SHORT 2.Equivalent 3.Sorting 3.1 P1min 3.2 P1max 3.3 P2min 3.4 P2max 3.5 P3min 3.6 P3max 3.7 Q min 3.8 D max 3.9 L/C/R/Z 4.Auto-LCZ 5.Buzzer 6.Change cursor 7.Advanced set 8.State save & exit Figure 3-4 OSD Menu Tree...
  • Page 14 1.Clear “0” a) Press button to enter clear “0” function. b) TH2820 can select OPEN or SHORT automatically: When terminals are opened, cursor flashes under 1.1 OPEN; When terminals are shorted, cursor flashes under 1.2 SHORT; c) When a component is connected to the terminals, the following information is...
  • Page 15 Chapter 3 Operation Illustration 2. Equivalent Press button to enter equivalent option; 1. Clear “0” 2. Equivalent Figure 3-7 Equivalent Circuits buttons to select SER or PAL; Press to return. Notes: The actual capacitor, resistor and inductor are not the ideal capacitor, resistor and inductor.
  • Page 16 TH2820 LCR METER Form the above table, we can see that the parameters have relations with D , and the value of D will directly affect the values of the parameters. Take the following capacitor as an example: Example: The capacitance in series model is Cs = 0.1µF, calculate the capacitance in parallel model for (a) D1 = 0.0100, (b) D2 = 0.1000 and (c) D3 = 1.0000.
  • Page 17 Chapter 3 Operation Illustration Select the equivalent circuit according to the actual application in circuits. If a capacitor is used as a coupling capacitor, series circuit mode is the best choice; if a capacitor is used in a LC oscillator, then parallel circuit mode is more suitable. When there is no proper information available, please make decision according to following rules: For low impedance component（such as large capacitor or small inductor）, the...
  • Page 18 TH2820 LCR METER 3. Sorting Press button to enter sorting function son menu. button to select a digit to be changed. Press keys to change the digit value or sign (+/-). Press button to select digit position or return, value is saved automatically when return.
  • Page 19 Chapter 3 Operation Illustration 4.LCZ auto Press button to enter Auto-LCZ option: 3.Clearing 4.Auto-LCZ Figure3-10 Auto-LCZ option Press buttons to select ON/OFF. Press to return Notes: 1． When |Z|>25MΩ, Z/Q is selected automatically. 2． When |Z|<80mΩ, Z/Q is selected. 3． When 80mΩ< |Z| <25MΩ: If Q <...
  • Page 20 ④ Equivalent circuit model; ⑤ Auto-LCZ state; ⑥ Position of cursor. Instrument returns to measuring state after saving the states Note： Th2820 will exit the setup menu by pressing Setup or Start key, but the changed states can not be saved.

  • Page 21: Chapter 4 Maintenance And Measurement Basic

    Table 4-1 Typical values of U and C Measurement Contacts TH2820’s test terminals consists of four coaxial cables, the outer shield conductor of each cable is connected with Ground. Sometimes we also call it five test terminals. Five terminals are described as follows: HD：...

  • Page 22: Stray Capacitance

    TH2820 LCR METER disturbance. HD, HS and LD, LS should be connected at the lead of the component under test in order to reduce the influence of cable resistance and contact resistance especially in D measurement. When measuring low impedance, the drive terminals and sense terminals should be connected to leads of component separately so as to avoid the influence of lead resistance.
  • Page 23 Chapter 4 Maintenance and Measurement Basic When component of high impedance (for example small capacitor) is measured, the influence of stray capacitance cannot be ignored. As shown in Figure 4-1, Cd is in parallel with Cx. When there is conductor board under the tested component, capacitance Ch is connected in series with Cl, then Ch and Cl are connected to with Cx in parallel.

  • Page 24: Chapter 5 Contents And Warranty

    TH2820 LCR METER Chapter 5 Contents and Warranty Contents After unpacking the shipping container, please do following checking: Any signs of damage or scratching on the outlook of the products （1） Table of contents: （2） DESCRIPTION QTY. REMARK TH2820 LCR Meter...

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