TH2821A Portable LCR Meter
Contents
1. POWER Onore PARA dd d CLEAR A Range Up LIMIT 2 Limit reg Tay eme DESEE TESTE n V Range Down BUZZER Mode DH Data Hold EQU M SHIFT 2 Function The 3 Functions J SI tt and Ere are valid during Menu setup and Data input operations 16 Table 2 2 Key Description TH2821A OPERATION MANUAL Chapter 3 Operation 3 1 Power on 1 Press POWER key to turn on TH2821A 2 The operation system version will be displayed 3 At last the instrument enters the measurement state 1 345 6 7 TkHz 0 11 10 9 Figure 4 1 Measurement Display Measurement display description 1 Battery Supply 3 Beeper ON 4 Series Circuit 5 Sorting Result P1 6 Parameter D 7 Secondary parameter 8 Unit 9 Range 0 Auto 10 Primary parameter 11 Frequency 1 kHz 12 Parameter C 17 TH2821A OPERATION MANUAL 3 2 How to operate 3 2 1 First Key Functions 1 Parameter Setup Press PARA key to select the following measurement parameter combinations L Q C D R Q and Z Q Units Description uH mH H pF nF uF Q kQ MQ Table 4 1 Units Z is the absolute value of impedance Measurement value of L C or R may be positive or negative Negative capacitance value means that the device under test is actually an inductor also negative inductance value means that the device under test is actually a capaci2. of two years from the date of shipment During the warranty period Our company will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by our company Warranty limitation The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse or improper site preparation or maintenance Chapter 1 Overview Thank you for purchasing our product To get the maximum performance from the instrument please read this manual first and keep this manual at hand 1 1 Introduction TH2821A is a microprocessor controlled portable meter with low power consumption It can measure six basic parameters they are inductance L capacitance C resistance R impedance Z dissipation factor D and quality factor Q TH2821A can fulfill the measurement needs of various component manufacturers and maintenance technicians 1 2 Main Functions 1 Test Parameter L Q C D R Q and Z Q 2 Correction OPEN multi frequency correction of open circuit SHORT multi frequency correction of short circuit 3 Display Mode Direct direct measurement value A absolute deviation A percent deviation 4 Range Hold When measuring a large number of components with the same nominal value this function can effectivel
3. the AC DC adaptor The TH2821A must be operated under the following environment conditions Temperature 0 C 40 C Humidity lt 90 RH at 40 C Storage Temperature 25 C 50 C 12 TH2821A OPERATION MANUAL Chapter 2 Panel Illustration 2 1 LCD Display Illustration 12345 6 7 Figure 2 1 LCD Display 13 TH2821A OPERATION MANUAL No Description No Description Battery Power 1 Indicator 8 Unit Indicator Remote c 2 Indicator 9 Ranging Mode Indicator 3 Beeper 10 Primary Parameter Indicator Display Series Parallel 4 Indicator 11 Frequency Indicator 5 Comparator 12 Primary Parameter Indicator Indicator Secondary 6 Parameter 13 2 Function Indicator Indicator Secondary 7 Parameter 14 ee Power Supply Display Table 2 1 LCD Description Others DH Data hold indictor CAL Correction function indictor MENU Menu operation indictor 14 TH2821A OPERATION MANUAL 2 2 Keyboard Illustration CLEAR LIMIT MENU Power PARA c LJ L FREQ ENTER EQU BUZZER DISPLAY lt v Figure 2 2 Keyboard Convention Key Function Conventions l function PARA 2 function CLEAR 3 function EJ 15 TH2821A OPERATION MANUAL No Key Function i F nction
4. D The value of D or Q directly determined the parameter values in different circuit mode Example Three capacitors have the same series capacitance Cs 0 1yF but their dissipations are different with each other D1 0 0100 D2 0 1000 D3 1 0000 According to the above equation we can get their capacitance in parallel mode 1 0 09999 uF 2 0 09901 uF Cp3 0 05000 uF We can find that Cs is almost the same with Cp when D is very small D lt 0 01 but when D is more than 0 01 Cp and Cs are different obviously For example When D 0 1 the difference is 196 but when D 1 the difference is almost 50 3 Alarm Setup press S key to select the second function SHIFT will be lighted on the screen 24 TH2821A OPERATION MANUAL Press BUZZER the following information will be displayed on the LCD screen DI _ D C MLETI MILL Lit Figure 4 4 Alarm Setup e Use keys to select following alert modes in turn OFF Alert off Plalert mode P2alert mode P3 alert mode NG NG alert mode Press save the alert setup and return to the measurement state press Ej to abort the alert setup without change 4 Display Mode e Press e key to select the second function SHIFT will be lighted on the screen Press DISPLAY key to select the display mode Direct Absolute deviation A Percent deviation A99 d Note 1 Absolute deviatio
5. Portable LCR Meter OPERATION MANUAL English November 2005 1 Edition Rev 1 0 0 Copyright 2005 Changzhou Tonghui Electronic Co Ltd All rights reserved TH2821A OPERATION MANUAL Contents oed n eto ed ras 2 How to Contact 5 3 Incoming Inspection d Notes ON USR ciale 5 WarranLby tnt reo reet 6 Chapter 1 7 T T Introduction aed ett s 7 1 2 Main 7 1 3 Specification S ass rca 9 1 4 Environment Requirements 12 Chapter 2 Panel Illustration 13 2 1 LCD Display Illustration 13 2 2 Keyboard 15 Chapter Operation neee 17 3 T POWT cis ite b eb ER EA 17 3 2 How to 18 3 2 1 First Key Functions 18 3 2 2 Second Key Functions 20 3 3 Battery 30 3 4 Clearing 31 Appendice tere tert RO ata 32 TH2821A OPERATION MANUAL How to Contact Us Changzhou Tonghui Electronic Co Ltd Address No 3 Tianshan Road New District Changzhou Jiangsu China Tel 0086 519 5132222 5113342 5109592 Fax 0086 519 5109972 http www tongh
6. and is not available for users 3 3 Battery recharge gNote The instrument will not be started when the battery is weakening Recharge the battery immediately by using DC Adaptor Power Supply Battery Power Indicator will flash when charging 30 TH2821A OPERATION MANUAL Charging may disturb measurement result sometimes The battery must be 9V series Nickel Metal Hydride rechargeable battery For example GP20R8H and LH 2007HC 2 3hoursfor charging and 5 6 hours for using 3 4 Clearing Instruction To clean the instrument use a soft cloth slightly dipped in water Do not spray cleanser directly onto the instrument since it may leak into the cabinet and cause damage Do not use chemicals containing benzine alcohol or aromatic hydrocarbons 31 TH2821A OPERATION MANUAL Appendix Message Code Table ELEA OPEN Clear Open Short Pl Pl NG Q D Std APO CAL PSD Alert ON OFF Pass Fail Quit Correction Open correction Short correction High limit of P1 Bin Low limit of P1 Bin No Good Low limit of quality factor High limit of dissipation factor Standard value Nominal value Auto Power Off Accuracy Calibration Password First Edition2005 11 32
7. apacitance C 210pF dissipation D 0 0010 and test frequency f 1 kHz Solution Zy Ry l J20fG 1 1 Iz 75790 2x3 1416x1000x210x10 From the Table 4 2 we can get the correct measurement range is No 2 4 Data Hold Press DH key to freeze the display press DH key again to release 3 2 2 Second Key Functions 1 Correction Function press S key to select the second function SHIFT will be lighted on the screen Press CLEAR key to enter the correction function the following information will be displayed on the screen E TUC T wu LIE Ell LL Lue LLLITI 100 Hz o Figure 4 2 Correction Display 20 TH2821A OPERATION MANUAL ELEA Clear is displayed in the primary parameter display area OPEN Short Short or 9u Quit will be displayed in the secondary parameter display area d Note 8PEn OPEN Short Short 9 Quit are selected and displayed automatically by the meter according to the impedance value of the device under test Press Ej key to cancel the correction operation and return to the measurement state Press Enter key to start the correction measurement When correction measurement is finished PASS or FAIL will be displayed on the screen see Figure 4 3 DI C MENU l 0 100 Hz Figure 4 3 Open correction Passed Press E key to abort the current correc
8. ill be lighted on the screen Press EQU key to select the Series or Parallel circuit mode Refer to Figure4 1 d Note 1 The actual C R and L are not the ideal pure C R and L Normally an actual component can be regarded as the combination of an ideal resistor and an ideal reactor in series or parallel circuit mode TH2821A can convert between the two different equivalent circuit modes using the following equations The measurement values of the two different circuit modes maybe different under different quality factor Q or dissipation factor D 22 TH2821A OPERATION MANUAL Capacitance Cp from parallel to series Cp Circuit Mode Rp Dissipation DE 1 EU 2mC R Series 1 D C 1 Capacitance Cs from series to parallel Circuit Mode Cs issipation 1 Dissipation Q Parallel C 1 1 D C R R 1 D D Inductance Lp from parallel to series aay Circuit Mode Rp Dissipation DE 27fL p i R Q Series L Y D L R RD 1 D 23 TH2821A OPERATION MANUAL Inductance Ls from series to parallel a Circuit Mode LP 27 Dissipation D i d 2L Parallel L 5 1 D L R RQ DD Here parameter with subscript s means the series mode parameter with subscript p means the parallel mode 3 From the above equations we can conclude that the conversion between series and parallel is determined by D or Q Q 1
9. n A display mode 25 TH2821A OPERATION MANUAL kHz 0 Figure 4 5 Absolute deviation A display mode A X n Xu Where X is the measurement value Xs is the standard value Percent deviation A display mode Fixture 4 6 Percent deviation A display mode X X std A 26 TH2821A OPERATION MANUAL 5 Sorting Setup Convention Main Menu Data Input Select the former item Select the left digit Select parameter for Increase the digit move Std setup the point left and set the O Select parameter for Std setup unit Decrease the digit move Enter Enter the sub menu sub Enter the sub menu Return the sian state the point right and set the unit Confirm the data input and return to the main menu Table 4 4 Key convention in sorting setup Dress gt key to select the second function SHIFT will be lighted on the screen Press LIMIT to enter the sorting setup will be flashing the screen and the value of is also displayed Use lt to select the following sorting parameters Pi Low limit of P1 P1 High limit of P1 Pe Low limit of P2 Pe High limit of P2 P3 Low limit of P37 High limit of E Return to the main menu 21 TH2821A OPERATION MANUAL 3 Low limit of Q d High limit of D Std Standard value Press E key to abort the sorting setu
10. p and return to the measurement state Press Ee key to select a parameter and enter the data input operation ET 1 l ni LILII Figure 4 7 Sorting Limit Setup 4 eo Use I keys to select a digit or the point Use 1 UJ keys to set the numeric value Press to return to the main menu Press Ere to confirm and save the numeric data Select parameter STD to set the standard Value Figure 4 8 Standard Value Setup Use I keys to select a digit the point or the unit Use 1 UJ keys to set the numeric data and unit Press to return to the main menu 28 TH2821A OPERATION MANUAL press Ed to confirm and save the numeric data Figure 4 8 Sorting Flow Chart 29 TH2821A OPERATION MANUAL 6 Other Functions Dress gt key to select the second function SHIFT will be lighted on the screen Press MENU key APO will be flashing on the screen Current delay time is also displayed e press Exe key to enter the auto power off function setup current delay time flashes on the screen e Use UJ keys to select 5 i0 2030 or OFF e press Enel key to confirm the current delay time and return to the main menu d Note E When an external DC adapter is used APO function is disabled automatically Use I keys to select CAL function e press Enel key to enter the calibration function This function is protected with password
11. ply 9V rechargeable battery or DC12V 100 mA adapter Low Battery Indication HNS Power Normal Approx 25 mA Consumption Auto power off Approx 500 nA Auto Power Off time Approx 5 minutes Weight Approx 400 g Dimensions 200mm L x 95mm W x 40mm D Table 1 1 Specifications 10 TH2821A OPERATION MANUAL Note Primary parameter accuracy Ae C 0 3 1 Cx CmaxtCmin Cx L Ae 0 3 1 Ly Lmaxt Lmin Lx Z Ac 0 3 1 Zx Zmaxt Zmin Zx R 0 3 1 Ry Rmmaxt Rmin Rx Max and Min values are as follows Parameter Range Auto Cmax 80uF f Cmin 150pF f Lmax 159H f Lmin 0 32mH f Zmax 1MQ Zmin 1 590 Here Zmax Rmax Zmin Rmin Frequency unit kHz Secondary parameter accuracy D A 3 when D 0 1 De 1 0 3 when Dx gt 0 1 D Q t Qx Pe De lt 1 1p Qy x D 11 TH2821A OPERATION MANUAL 1 4 Environment Requirements 1 Please do not operate TH2821A under the following environment conditions as any of them will directly affect measuring precision or damage the meter Please do not operate the instrument in places where is dusty vibrant under direct sunlight or where there is corrosive air Although TH2821A has been specially designed for reducing the noise caused by AC power the environment with low noise is still recommended If this can not be arranged please make sure to use power filter for
12. tion data measurement and return to the measurement The previous correction data will still be stored d Note 1 The correction function must be used for accurate measurement The correction function can eliminate the stray admittance capacitance and inductance and the residual impedance resistance and reactance induced by test fixture test leads and 21 ID TH2821A OPERATION MANUAL instrument itself Perform the correction operation again if the measurement conditions are changed such as test fixture and environment temperature It is recommended to perform the open and short correction at the same time During short correction period FA FAIL will be displayed in the secondary parameter display area when short correction is failed Make sure that the measurement contacts are shorted reliably and perform the short correction again TH2821A measures the correction data at all frequency points and all measurement ranges The correction data is stored in the non volatile memory So you don t have to perform the correction again if the test conditions are not changed Open and short corrections are automatically selected by the instrument according to the impedance value under test If there is a component in the fixture or if there is error with the instrument 90 Quit will be displayed in the secondary parameter display area Equivalent Circuit Press ss key to select the second function SHIFT w
13. tor In theory R should be positive constantly under some condition R may be negative due to over zero correction Please carry out correct zero correction The maximum number of display digits is 5 but 5 digit is not always available and 4 digit is displayed sometimes The conversion is described in the following description From 4 digit to 5 digit When the first 2 digit of current value is less than 18 From 5 digit to 4 digit When the first 2 digit of current value is more than 20 2 Frequency Setup Use FREQ key to select the following test frequencies in turn 100 Hz 120 Hz 1 kHz and 10 kHz 18 TH2821A OPERATION MANUAL 3 Range Setup A V and AUTO range AUTO keys are used to set the measurement key toggles ranging mode between Auto and Hold A an d V keys are used to increase or decrease the measurement range if the current ranging mode is Auto then the ranging mode is changed to Hold at the same time d Note When ranging mode is set to HOLD the measurement range is fixed at current range Overload symbol will be displayed if the impedance under test exceeds the current effective measurement range or display range Range No Range Resistor 100kQ Range Up Table 4 2 Ranges 19 TH2821A OPERATION MANUAL d Note How to calculate the measurement range Example Assume c
14. ui com cn http www tonghui cn Email sales tonghui com cn TH2821A OPERATION MANUAL Incoming Inspection Inspect the shipping container for damage The contents of the shipment should be listed as follows If the contents are incomplete if there is damage or defect please contact our company or your nearest Sales and Service Office Accessories TH26028 DC Power Adapter 1 TH26027 4 terminal Kelvin test clip leads 1 LH 200H7C rechargeable battery inside 1 User Manual 1 Options TH26029 SMD component test fixture TH2821A OPERATION MANUAL Notes on Use This meter is only for indoor use Turn off the TH2821A while switching the power supply between battery and DC adapter or replacing the battery Although internal circuit protection is provided DC voltage or current may damage TH2821A Before you measure a capacitor be sure the capacitor is fully discharged Charging may disturb measurement result sometimes Nickel Metal Hydride rechargeable battery can be used for the power supply TH2821A will not work normally when battery voltage is less than 6V The 12V AC to DC adaptor is recommended to be used for TH2821A power supply Perform Open and Short corrections for accurate measurement especially when test fixture is changed The functions locked with password are not accessible by users TH2821A OPERATION MANUAL Warranty This instrument product is warranted against defects in material and workmanship for a period
15. y improve the measuring rate TH2821A OPERATION MANUAL Comparator Function Built in 4 Bins comparator NG P1 P2 and P3 Equivalent Circuit Mode Both parallel and series equivalent circuit modes can be obtained Data Hold This function can be used to freeze the current display value Alarm Mode NG P1 P2 P3 and OFF modes can be selected TH2821A OPERATION MANUAL 1 3 Specifications Parameter L Q C D R Q and Z Q Frequency 100 Hz 120 Hz 1 kHz and 10 kHz Accuracy Basic Accuracy 0 3 5 digits display for both primary and secondary Display parameters A 100 Hz 120 Hz 1 uH 9999 H 1 kHz 10 kHz 0 1 uH 999 9 H 100 Hz 120Hz 1 pF 9999 uF Measurement Range 1kHz 10 kHz 0 1 pF 999 9 uF R Z 0 0001 999 9 MO D Q 0 0001 9999 A96 0 0001 999996 10kHz 0 1 Vrms 1 15 Test Level 30H Range Auto 2 0 3 Vrms 1 15 and Open 1kHz pw Circuit 100Hz 0 42 Vrms 1 15 Ranging Mode Auto and Hold SRC a Parallel and Series ircuit Display Direct AABS and A Correction Open and Short Zeroing Rate Approx 3 meas sec Terminals 5 terminals TH2821A OPERATION MANUAL Continued Comparator 4 Bins NG P1 P2 and P3 A96 9999 99999 L 0 0001 uH 99999 H Limit Setup 5 Range C 0 0001 pF 99999 uF 9 R 0 0001 99999 MQ Z 0 0001 Q 99999 MQ Alarm Mode NG P1 P2 P3 and OFF Power Sup
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