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Tonghui TH2821A Operation Manual

Portable lcr meter
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TH2821A
Portable LCR Meter
OPERATION MANUAL
English
November 2005
st
1
Edition Rev 1.0.0
© Copyright 2005 Changzhou Tonghui Electronic Co., Ltd.
All rights reserved.

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Summary of Contents for Tonghui TH2821A

  • Page 1 TH2821A Portable LCR Meter OPERATION MANUAL English November 2005 Edition Rev 1.0.0 © Copyright 2005 Changzhou Tonghui Electronic Co., Ltd. All rights reserved.

  • Page 2: Table Of Contents

    TH2821A OPERATION MANUAL Contents Contents ............2 How to Contact Us ........3 Incoming Inspection ........4 Notes on Use ..........5 Warranty: ............6 Chapter 1 Overview..........7 1.1 Introduction...........7 1.2 Main Functions ........7 1.3 Specifications ........9 1.4 Environment Requirements ....12 Chapter 2 Panel Illustration......13 2.1 LCD Display Illustration......

  • Page 3: How To Contact Us

    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.tonghui.com.cn http://www.tonghui.cn Email: sales@tonghui.com.cn...

  • Page 4: Incoming Inspection

    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.

  • Page 5: Notes On Use

    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.

  • Page 6: Warranty

    TH2821A OPERATION MANUAL Warranty: This instrument product is warranted against defects in material and workmanship for a period 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.

  • Page 7: Chapter 1 Overview

    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．...
  • Page 8 TH2821A OPERATION MANUAL 5． Comparator Function Built-in 4 Bins comparator: NG, P1, P2 and P3. 6． Equivalent Circuit Mode Both parallel and series equivalent circuit modes can be obtained. 7． Data Hold This function can be used to freeze the current display value.

  • Page 9: Specifications

    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 Basic Accuracy: 0.3% Accuracy 5 digits display for both primary and secondary Display parameters 1 µH – 9999 H 100 Hz,120 Hz 0.1 µH –...
  • Page 10 TH2821A OPERATION MANUAL (Continued) Comparator 4 Bins：NG, P1, P2 and P3 ∆% -9999% - 99999% 0.0001 µH – 99999 H Limit Setup 0.0001 pF – 99999 µF Range 0.0001 Ω - 99999 MΩ 0.0001 Ω - 99999 MΩ Alarm Mode...
  • Page 11 TH2821A OPERATION MANUAL Note： Primary parameter accuracy(A C： = 0.3%(1+C L： = 0.3% (1+ L Z： = 0.3% (1+ Z R： = 0.3%(1+ R Max and Min values are as follows： Parameter Range Auto 80µF/f 150pF/f 159H/f 0.32mH/f 1MΩ 1.59Ω...

  • Page 12: Environment Requirements

    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.

  • Page 13: Chapter 2 Panel Illustration

    TH2821A OPERATION MANUAL Chapter 2 Panel Illustration 2.1 LCD Display Illustration Figure 2-1 LCD Display...
  • Page 14 TH2821A OPERATION MANUAL Description Description Battery Power Unit Indicator Indicator Remote Ranging Mode Indicator Indicator Beeper Primary Parameter Indicator Display Series/Parallel Frequency Indicator Indicator Comparator Primary Parameter Indicator Indicator Secondary Function Indicator Parameter Indicator Secondary DC Adaptor Power Supply Parameter...

  • Page 15: Keyboard Illustration

    TH2821A OPERATION MANUAL 2.2 Keyboard Illustration CLEAR LIMIT MENU ③ ① ② ④ POWER PARA FREQ ENTER ▲ DISPLAY BUZZER ⑧ ⑦ ⑥ ⑤ SHIFT AUTO Figure 2-2 Keyboard Convention： Key Function Conventions PARA function: function: CLEAR function:...
  • Page 16 TH2821A OPERATION MANUAL SHIFT+ Function Function Power ○ POWER On/Off Parameter Correction ○ PARA CLEAR Selection Sorting Limit ○ Range Up LIMIT Setup Frequency Auxiliary ○ FREQ MENU Selection Menu Range Auto Display Mode ○ AUTO DISPLAY Selection Selection Alarm Mode ○...

  • Page 17: Chapter 3 Operation

    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. Figure 4-1 Measurement Display Measurement display description: 1.

  • Page 18: How To Operate

    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: µH µF R/|Z| Ω kΩ MΩ Table 4-1 Units |Z| is the absolute value of impedance. Measurement value of L, C or R may be positive or negative.
  • Page 19 TH2821A OPERATION MANUAL 3. Range Setup: and AUTO keys are used to set the measurement range. AUTO key toggles ranging mode between “Auto” and “Hold”. 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”...

  • Page 20: Second Key Functions

    TH2821A OPERATION MANUAL Note： How to calculate the measurement range Example: Assume capacitance C=210pF, dissipation D=0.0010 and test frequency f=1 kHz. Solution: π ≈ ≈ Ω π × × × × − 1416 1000 From the Table 4-2, we can get the correct measurement range is No.
  • Page 21 TH2821A OPERATION MANUAL Clear (Clear) is displayed in the primary parameter display area, OpeN (OPEN), Short (Short) or Quit (Quit) will be displayed in the secondary parameter display area. Note： OpeN (OPEN), Short (Short) and Quit (Quit) are selected and displayed automatically by the meter according to the impedance value of the device under test.
  • Page 22 Make sure that the measurement contacts are shorted reliably and perform the short correction again. 4． 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.
  • Page 23 TH2821A OPERATION MANUAL Capacitance Cp: from parallel to series Circuit Mode： Dissipation： π Series： Capacitance Cs：from series to parallel Circuit Mode： Dissipation: π Parallel: Inductance Lp：from parallel to series Circuit Mode： π Dissipation: Series:...
  • Page 24 TH2821A OPERATION MANUAL Inductance Ls：from series to parallel Circuit Mode： Dissipation： π Parallel: Here parameter with subscript s means the series mode, parameter with subscript p means the parallel mode. From the above equations, we can conclude that the conversion （Q=1/D）.
  • Page 25 TH2821A OPERATION MANUAL Press BUZZER, the following information will be displayed on the LCD screen： Figure 4-4 Alarm Setup keys to select following alert modes in turn. OFF Alert off P1 alert mode P2 alert mode P3 alert mode NG alert mode...
  • Page 26 TH2821A OPERATION MANUAL Figure 4-5 Absolute deviation（∆）display mode ∆ X − Where X is the measurement value, X is the standard value. 2． Percent deviation（∆%）display mode Fixture 4-6 Percent deviation（∆%）display mode. − ∆ ⋅...
  • Page 27 TH2821A OPERATION MANUAL 5. Sorting Setup Key Convention： Main Menu Data Input Select the former item Select the left digit Select the next item Select the right digit Increase the digit, move Select parameter for the point left and set the...
  • Page 28 TH2821A OPERATION MANUAL Q_: Low limit of Q D~: High limit of D StD: Standard value Press key to abort the sorting setup and return to the measurement state. Press key to select a parameter and enter the data input operation.
  • Page 29 TH2821A OPERATION MANUAL Press to confirm and save the numeric data. Sorting Setup D ≤ Dmax Q ≥ Qmin P1min ≤ ∆% ≤ P1max P2min ≤ ∆% ≤ P2max P3min ≤ ∆% ≤ P3max Figure 4-8 Sorting Flow Chart...

  • Page 30: Battery Recharge

    TH2821A OPERATION MANUAL 6. Other Functions： Press 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. Press key to enter the auto power off function setup, current delay time flashes on the screen.

  • Page 31: Clearing Instruction

    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. 。 2~3 hours for charging and 5~6 hours for using. 3.4 Clearing Instruction To clean the instrument, use a soft cloth slightly dipped in water.

  • Page 32: Appendix

    TH2821A OPERATION MANUAL Appendix Message Code Table： Clear: Correction clear Open: Open correction OpeN Short: Short correction short High limit of P1 Bin — P1_: Low limit of P1 Bin No-Good Low limit of quality factor High limit of dissipation factor...

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