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Smart LCR tweezers LCR Pro1-Russian RLC tweezers HB-14

Discussion in 'General Electronics Discussion' started by caps, May 1, 2019.

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  1. 73's de Edd

    73's de Edd

    2,805
    1,176
    Aug 21, 2015
    How quantatative is that reading of that low of picofarad value of capacitance, when you are swamping it with picofarads of hand capacitance with the fingers handling the tweezers ?
     
  2. caps

    caps

    155
    8
    Jul 29, 2018
    I did not quite understand your question. Please tell me more precisely what moment interests you.
     
  3. caps

    caps

    155
    8
    Jul 29, 2018
    Measurements in the circuit.
    0.1uF/50V.
    4.5652Ohm.jpg
    4,5Ohm.jpg
     
  4. caps

    caps

    155
    8
    Jul 29, 2018
    1uF 400v.
    Very good.
    LCR Pro1.
    ESR-14.989Ohm.
    14.989Ohm.jpg
    ESR meter 100kHz.
    15 Ohm.
    15 Ohm.jpg
     
  5. SHA_S

    SHA_S

    14
    0
    May 25, 2019
    Tweezers after calibration have very small capacitances of probes, with HB-14 it is usually 0.001 pF or less. If I understand the question correctly.
     
  6. caps

    caps

    155
    8
    Jul 29, 2018
    1uF 450v.
    LCR Pro1.
    17.059 Ohm.
    17.059Ohm.jpg
    ESR meter 100kHz.
    17 Ohm.
    17 Ohm.jpg
     
  7. caps

    caps

    155
    8
    Jul 29, 2018
    Another capacitor 1uF 450v.
    Thus, we checked the linearity of the ESR meter scale to 20 Ohms.
    All perfectly.
    20.096 Ohm.jpg
    20 Ohm.jpg
     
  8. caps

    caps

    155
    8
    Jul 29, 2018
    If I understood correctly, you meant this.
    0.0000pF
    0.0000pF.jpg
     
  9. caps

    caps

    155
    8
    Jul 29, 2018
    I will give a good example, why else besides small capacitors, we need this ESR 100kHz meter.
    Most homemade ESR meters have a maximum upper limit of 20-30 Ohms.
    In this ESR meter, the maximum distinctive value is 300Ohm.
    Capacitor 3,3uF /450v.
    Capacitance is almost normal, but the ESR is very high.
    After 20 Ohms, the scale is nonlinear.
    ESR ~ 40 Ohm.
    3.2447uF.jpg
    40 Ohm.jpg
     
  10. caps

    caps

    155
    8
    Jul 29, 2018
    73's de Edd
    To measure the capacitance less than 1 pF, it was necessary to connect two capacitors 1 pF in series.
    Very good.
    0.5124pF.
    0.5124pF.jpg
     
    Last edited: Jun 12, 2019
  11. SHA_S

    SHA_S

    14
    0
    May 25, 2019
    Quite high losses in 1pF capacitors, who is to blame, tweezers or a capacitor?
    Can I see the losses in the capacitor type "K71-7" at frequencies of 1 kHz and 10 kHz?
     
    Last edited: Jun 12, 2019
  12. SHA_S

    SHA_S

    14
    0
    May 25, 2019
    Judging by the lack of an answer to the question, LCR Pro1 was sent to the trash.:)
     
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