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

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

1. ### 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

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

3. ### caps

155
8
Jul 29, 2018
Measurements in the circuit.
0.1uF/50V.

4. ### caps

155
8
Jul 29, 2018
1uF 400v.
Very good.
LCR Pro1.
ESR-14.989Ohm.

ESR meter 100kHz.
15 Ohm.

5. ### 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

155
8
Jul 29, 2018
1uF 450v.
LCR Pro1.
17.059 Ohm.

ESR meter 100kHz.
17 Ohm.

7. ### 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.

8. ### caps

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

9. ### 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.

10. ### 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.

Last edited: Jun 12, 2019
11. ### 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

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