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Summary of Contents for Tonghui TH2618B
- Page 1 OPERATION MANUAL TH2810B LCR METER TH2618B CAPACITANCE METER TH2775B INDUCTANCE METER...
- Page 2 Thanks for purchasing and using our product. Please confirm the product set and accessories with shipment list. If there is any unconformity, please contact sales office or Tonghui Company as soon as possible to protect your benefits! DESCRIPTION Refer to descriptions of front and rear panels in § 1.6 on P 1-6.
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Page 3: Table Of Contents
CONTENTS Chapter 1 General introduction ....................5 Brief introduction ......................5 Specifications ......................5 1.2.1 Measurement terminals ..................5 1.2.2 Measurement parameters...................6 1.2.3 Display range ....................6 1.2.4 Measurement accuracy..................6 1.2.4.1 Maximum and minimum values for different ranges ........7 1.2.4.2 Deviation factor ks ..................7 1.2.4.3 Level factor kv ....................7 1.2.4.4 Frequency factor kf ..................7 1.2.5 Test signal frequency ..................7... - Page 4 2.3.2 Trigger (continuous/single) ................22 2.3.3 Equivalent model ....................22 2.3.4 Serial interface ....................23 2.3.5 Sorting mode ....................28 2.3.5.1 Sorting procedure ..................29 2.3.5.2 Handler interface ..................30 2.3.6 Signal source resistance ..................32 2.3.7 Key lock ......................32 2.3.7.1 Entering key lock ..................32 2.3.7.2 Exiting key lock ..................32 2.3.7.3 Notices in the state of key lock ...............33 2.3.8...
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Page 5: Chapter 1 General Introduction
TH2618B capacitance meter, and TH2775B inductance meter. And they differ in measurement parameters (referring to Table 1-1 Measurement Parameters Table in § 1.2.2). TH2618B and TH2775B only have some functions of TH2810B, so this manual is applicable to TH2810B and the contents which are only applicable to TH2618B or TH2775B are marked. -
Page 6: Measurement Parameters
1.2.2 Measurement parameters Model Parameter TH2810B L-Q, C-D, R-D, Z-Q TH2618B C-D, R-D TH2775B L-Q, R-Q Table 1-1.Measurement Parameters L: inductance C: capacitance R: resistance Z: impedance Q: quality factor D: tangent of dissipation angle The instrument provides two kinds of equivalent circuits, series connection and parallel connection, in which Z, D and Q have the same values while C, L and R have different values. -
Page 7: Maximum And Minimum Values For Different Ranges
1.2.4.1 Maximum and minimum values for different ranges Frequency Parameter 100Hz 120Hz 1kHz 10kHz Cmax 800μF 667μF 80μF 8μF Cmin 1500pF 1250pF 150pF 15pF Lmax 1590H 1325H 159H 15.9H Lmin 3.2mH 2.6mH 0.32mH 0.032mH Zmax/ 1MΩ Rmax Zmin/ Rmin 1.59Ω Table 1-2. -
Page 8: Measurement Speed
1.2.8 Measurement speed Fast: around 15 times/sec.; Slow: around 4.5 times/sec.; The actual speed differs with different measurement conditions such as frequency, component value, display mode, measurement mode, once, range mode, RS232 interface and so on. The typical speeds for Fast, Medium and Slow are given under the following measurement conditions: ·... -
Page 9: Notice
1.3.4 Notice Do not operate the instrument in the conditions of much dust, vibration, strong sun shining, or Even the instrument has made special treatment for different signals (especially AC power noise); please operate in the condition of low noise. If unavoidable, please install power filter. -
Page 10: Panel
not when sorting result is qualified Trigger select trigger mode: §2.3.2 on P2-10 continuous or single Equivalent type to select circuit’s equivalent §2.3.3 on P2-10 type: series connection or parallel connection Serial interface to select whether to send data §2.3.4 on P2-11 outside through RS232... -
Page 11: Front Panel Description
NAME FUNCTION DESCRIPTION provide serial interface between RS-232C serial instrument peripheral equipments interface (9-pin) (referring to §2.3.4) HANDLER interface to provide controlling interface between the (9-pin) instrument and system (referring to §2.3.5.2) to indicate following information: License No., Nameplate date, serial No. and manufacturer. Fuse to protect the instrument, 1A LINE input receptacle... - Page 12 HD and HS should be connected to one lead of the device under test and LD and LS should be connected to another lead. TH2810B LCR meter Trade mark of Tonghui TH2618B capacitance meter & model TH2775B inductance meter All the function statees of the instrument can...
- Page 13 Figure 1-2. Front Panel Overview...
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Page 14: Chapter 2 Operation Instruction
Chapter 2 Operation instruction This chapter provides detailed description of all functions of the instrument and operation instruction. Keyboard and functions introduction Figure 2-1.Keyboard Overview Figure 2-2.Status Indicator TH2810B has 7 keys, and all of them have different functions in different conditions without direct definition. - Page 15 FUNC Inner function Measurement Parameter setup FUNC START Figure 2-3. Status Conversion and Keys Note: some characters are displayed on display window, while some corresponding letters show parenthesis manual. correspondence of letters and characters is shown in the following table: For example: When performing short correction, is displayed, indicating “CLEAr SH”.
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Page 16: Function Conversion In "Measurement" State
The following parameters are only displayed in P3 mode High limit of Bin 2 (P2 Low limit of Bin 2 (P2 High limit of Bin 3 (P3 Low limit of Bin 3 (P3 And it is introduced how to realize each function as follows. Function conversion in “measurement”... -
Page 17: Measurement Frequency
Z displayed in Display A is always positive (≥0). C, L and R may have negative values. When measuring C & D, the negative value of C means that the component under test has the characteristics of an inductor. When measuring L&Q, the negative value of L means that the component under test has the characteristics of a capacitor. -
Page 18: Range Mode
△ 2.2.4.2 − Δ × The formula is: , in which Xx is measured value, and Xn is the set nominal value. Because it takes a while to complete deviation calculation at the time of measurement, the measurement speed slows a little. Nominal value must be set before deviation measurement, because the absolute deviation is the difference between the measured value of the component and a previously set nominal value. -
Page 19: Range Hold
Table 2-2.Range No., Range Resistance and Range Adjustment From Table 2-2, there is a cross of 5% between two neighboring ranges, instead of an absolute dividing limit. And the cross can avoid range’s frequent jumpiness when the impedance is right at the dividing limit, and the range doesn’t vary. -
Page 20: Clear (Correction)
Integration time in fast speed: approx. 30 ms; Integration time in slow speed: approx. 180ms; So approximate speeds can be calculated: Fast speed: approx. 15times/sec. Slow speed: approx. 4.5times/sec. 2.2.7 Clear (Correction) In order to maintain high measurement accuracy, SHORT and LOAD corrections for correcting the stray admittance, the residual impedance, and the other errors can be performed. - Page 21 resistance when test fixtures are used to make short. And HS and LS can be directly connected. Note: If the test terminals are not absolutely open or short, the instrument’s operation performance is probably affected by incorrect clear parameters after correction.
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Page 22: Alarm
5. Press FUNCTION key to exit. 2.3.1 Alarm The default setting is “OFF”, which means no alarm. When “ON” is selected, and the sorting result is “P1” or “PASS”, the beeper alarms. Only if the sorting parameter is correctly set to get correct sorting result signal, correct alarm signal can be obtained. -
Page 23: Serial Interface
usually measured in parallel circuit mode; Normally, when |Zx| < 10Ω, the series circuit mode is selected; When |Zx| >10kΩ, the parallel circuit mode is selected; When 10Ω<|Zx| <10kΩ, follow the manufacturer’s recommendation. Two equivalent circuits can be conversed through some formula, and Q and D don’t change in different circuits, as shown in table 2-4, where s means series connection, p means parallel connection. - Page 24 Figure 2-5 Data Format Transmitting through RS232C Serial Interface Hole Hole RS232C interface cable Pin 2: RXD pin, sending terminal Pin 3: TXD pin, receiving terminal Pin 5: GND, instrument ground Figure 2-6 RS232C Serial Interface’s Connection with Cable Information transmitted through RS-232C interface is ASCII code. The output information is listed in Table 2-5 (TH2810B computer).
- Page 25 Table 2-5 Format of Serial Data Transfer Note 1: In Th2618B: resistance (R) & dissipation (D) Note 2: In Th2775B: resistance (R) & quality factor (Q) The control command of TH2810B serial interface is listed in Table 2-6...
- Page 26 suggested that limit parameter and nominal value be input according to the format requirement after the instrument is adjusted, in order to avoid being dealt with as invalid command. Note 0 Command code Characters Function Note 1 measurement parameter & series connection and parallel connection: L-Q Note 2...
- Page 27 connection equivalent model: (PAR) parallel connection RS232A口: (OFF) only receiving RS232A口: (ON) receiving and sending sorting mode: P1 sorting mode: P3 signal source resistance: 30Ω signal source resistance: 100Ω NX=X ≤10 NX: related set parameters Parameter values and units are Example and notes: (symbols used to after “=”.
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Page 28: Sorting Mode
Note 0: “Command code” should be in the form of ASCII code in the real-world program. Such as, {0} can be recognized by its ASCII code, 7B41307D. Note 1: In TH2618B: resistance (R) & dissipation (D). Note 2: In TH2775B: resistance (R) & quality factor (Q). -
Page 29: Sorting Procedure
2.3.5.1 Sorting procedure Figure 2-7 Sorting Procedure in P3 Mode Figure 2-8 Sorting Procedure in P1 Mode... -
Page 30: Handler Interface
As shown in above figures, P3 sorting mode is suitable for sorting multi-bin, where only one of P1, P2, P3 and NG signals is valid. When one of P1, P2, P3 signals is valid, sub parameter must be qualified; and when NG signal is qualified, probably main parameter or sub parameter is not qualified. - Page 31 the resistance of 1 kΩ should be applied. Definitions of pins are as follows: 1. Sorting result (NG/DQNG, P1/PASS, P2/HI, P3/LO): output, low-asserted. 2. WAIT (busy): output, high-asserted. This signal can be used to control outer machine’s operation of dealing with equipment. When the signal is valid, the instrument is in the state of measurement and calculation.
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Page 32: Signal Source Resistance
time, as shown in Figure 2-10. 2.3.6 Signal source resistance There are two resistances available: 30Ω (default) and 100Ω. In Figure 2-11, Ei: signal source voltage Ei; Ri: signal source resistance; Zx: the DUT, Vx is its voltage and Ix current. Then, Vx=Ei Zx/(Ri+Zx) Ix= Vx/ Zx= Ei/(Ri+Zx) -
Page 33: Notices In The State Of Key Lock
2.3.7.3 Notices in the state of key lock When the instrument is in the state of key lock, all the keys are not available. Do not think that the instrument is defective. Please operate as §2.3.7.2 says, to return to the normal state. 2.3.8 Safeguard TH2810B has RAM inside, which stores some parameters so that they would lose easily. - Page 34 Low limit of pin 2 decimal point necessar (all y at 3-pin high limit of pin 3 numbers sorting low limit of pin 3 input mode of △ Table 2-7 Limit parameters...
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Page 35: Chapter 3 Component Measurement
Chapter 3 Component measurement This chapter provides description of instrument operation and lists some measurement examples. Unpacking and inspection 3.1.1 Notices 1. After unpacking, please verify with packing list. 2. Read Operation Manual in details before operating the instrument, especially some notes and notices;... - Page 36 Table 3-1 Default status Note: TH2775B’s default parameter is L-Q. 2. Select measurement parameter: L/Q, C/D, R/Q, Z/Q or R/D (only for TH2618B). NOTE 1 3. If necessary, select equivalent mode, referring to §2.3.3 on P2-19. 4. Select measurement frequency and test signal level.
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Page 37: Measurement Of Capacitor
level. The reason is that HP4284A’s signal source resistance is 100Ω, while TH2810B’s is 30Ω. According to §2.3.6 on P2-19, we know that voltage on the DUT is different even their level is the same. So change TH2810B’s resistance to 100Ω, and the same measurement value will be got. - Page 38 capacitance and inductance between the test terminals. Therefore, test fixture is recommended for high frequency measurement. If the test cable must be used, try you best not to move the cable during the corrections and measurements.
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Page 39: Chapter 4 Packing And Warranty
Chapter 4 Packing and Warranty Packing The contents are listed as follows: Description Quantity 1) TH2810B/TH2618B/TH2775B 2) TH26011 Kelvin Test Fixture 3) TH26004-1 5-terminal Test Cable 3) TH26010 Shorting Bar 4) Three-Wire Power Cable 5) Fuse (1A) 6) Operation Manual...
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