Osciloscopio atten ads 1102cal+ - Page 1
Forum section: electronics / testgear

author: naldo
author_rank: Contributor
timestamp: February 05, 2017, 04:12:34 pm
content: Bom dia amigos, estou precisando da ùltima ATUALIZAÇÃO deste scope. Do meu aparelho o software é = 5. 01.02.13 Outra pergunta : quando se faz a medição AC eu colocando uma tensão ac de 6v e apertando o OUTSET a senóide vai se enquadrar em 3 quadrados acima e três abaixo no gráfico da tela com a marcação em volt (lado esquerdo da tela) de "5,00 ~v". Isto quer dizer que tenho "30Vpp" no total. Conclusão : é que a medição do aparelho está sendo feita errada (cada quadrado vale 5v sendo que era para valer 1v).Obs: foi feita a calibragem do ap. e da sonda (10x) antes da medição. Pergunta : seria um defeito no software ou no aparelho. Meu agradecimento por 1 retorno !

author: tautech
author_rank: Super Contributor
timestamp: February 05, 2017, 08:20:35 pm
content: Welcome to the forum.This is an English speaking forum and for help you will need to translate your native language and post in English.Good luck.

author: naldo
author_rank: Contributor
timestamp: February 05, 2017, 11:19:53 pm
content: Good morning, friends, greetings! I need the latest UPDATE of this scope. From my device the software is: 5. 01.02.13 Another question: when the AC measurement is made I put a voltage ac of 6v and pressing the OUTSET the sinusoid will fit in 3 squares above and three below in the graph of the screen with the Volt mark (left side of the screen) of "5.00 ~ v". This means that I have "30Vpp" in total. Conclusion: it is that the measurement of the device is being made wrong (each square is worth 5v and that was for worth 1v) .Obs: the calibration of the ap. And the probe (10x) before measurement. Question: It would be a defect in the software or the device. My thanks for a return!

author: tautech
author_rank: Super Contributor
timestamp: February 05, 2017, 11:41:19 pm
content: Quote from: naldo on February 05, 2017, 11:19:53 pmIs it the same for both channels and both probes ?Check all combinations and the input attenuation is set to match the probe in the channel menus.Don't be tempted to use Siglent firmware in your Atten as it might cause problems.

author: naldo
author_rank: Contributor
timestamp: February 05, 2017, 11:57:26 pm
content: OK on the 2 channels and probe the same symptom. I make the initial configuration by pressing outset and the square senoid appears on the screen. I place the 6V AC voltage on the probe and tighten the outset again. The senoid appears with the characteristic I passed in the post. Attenuation of probes set at 10X. Note: I'm with this device only 1 week, it's semi new I made a purchase on the net.

author: tautech
author_rank: Super Contributor
timestamp: February 06, 2017, 12:08:45 am
content: Quote from: naldo on February 05, 2017, 11:57:26 pmTry resetting the DSO to Default settings and then reset the scope to the correct settings manually using the controls NOT Autoset.

author: naldo
author_rank: Contributor
timestamp: February 06, 2017, 12:16:25 am
content: Okay, I was doing it manually so I'll change as you said it. After (tomorrow) put the result, thank you!

author: naldo
author_rank: Contributor
timestamp: February 06, 2017, 11:48:42 am
content: Good morning, checking the scope commands did not find anything related to STANDARD but rather FACTORY but did not succeed. I noticed that the axis (x) at 0 stays at 10.0V with the probe at X1 and 100V at X10, done the initial configuration by pressing OUT the X axis does not stay at zero. Another thing I noticed is that when I turn the knob to INCREASE the value (to the right) the value of the voltage DIMINUI (in the marker on the left)

author: naldo
author_rank: Contributor
timestamp: February 06, 2017, 11:47:28 pm
content: Any tips ??

author: tautech
author_rank: Super Contributor
timestamp: February 07, 2017, 01:20:47 am
content: Quote from: naldo on February 06, 2017, 11:47:28 pmAs far as I know your scope is made by Siglent and is the same as a SDS1102CNL, the firmware can be downloaded here and is the same version you have listed above.I don't recommend you use the Siglent FW as it will change the OSD branding and may not be quite right for your scope anyway.http://www.siglentamerica.com/gjjrj-xq.aspx?id=817&tid=15Has your scope been subjected to any HV events ?How old is it ?Can you capture a screenshot using the Print button to a USB stick and post it for us to examine.2 please, one using Autoset for the probe Cal signal and another after using Default to return to factory settings, then adjust the scope UI for 1ms and 500mV/div for the probe Cal signal.

author: naldo
author_rank: Contributor
timestamp: February 07, 2017, 03:07:12 pm
content: Good afternoon ! I bought this device used a short time (1 week). I do not know if you received high voltage. It's still with the plastic on the screen, smell again. Note: The sinusoid (2) is of an applied voltage of 6.5Vac , FIG. (3) was calibrated in factory option. Am I operating the wrong scope ?? Follow the captures:

author: rf-loop
author_rank: Super Contributor
timestamp: February 07, 2017, 04:42:03 pm
content: Quote from: naldo on February 07, 2017, 03:07:12 pmSo, what is now problem?Your pictures tell that all is ok!Probe compensation output is 3Vpp around 1kHz square wave. And just it is in picture.Your AC signal in picture 2 is bit under 20V peak to peak.If it is pure sine and it is exactly 20Vp-p is is roughly same as 7.1Vrms.There in picture it looks more like roughly 19V peak to peak. If it is 19Vpp it is in this case roughly 6.7 Vrms Not so far away from 6.5Vrms

author: tautech
author_rank: Super Contributor
timestamp: February 07, 2017, 06:30:10 pm
content: Quote from: naldo on February 07, 2017, 03:07:12 pmAll looks perfect as rf-loop has said.TipProbe cal output is a good "sanity check" when you doubt what you see on the display. Use it when needed.

author: naldo
author_rank: Contributor
timestamp: February 07, 2017, 11:35:26 pm
content: TipProbe cal output is a good "sanity check" when you doubt what you see on the display. Use it when needed.I did not understand !! Explain to me otherwise.

author: tautech
author_rank: Super Contributor
timestamp: February 07, 2017, 11:48:38 pm
content: Quote from: naldo on February 07, 2017, 11:35:26 pmThe probe Cal output is a fixed and unchanging 3V squarewave @ 1 KHz and serves as a quick check to ensure you have everything set correctly; probe attenuation, input attenuation and OSD measurements.Use it a lot to become familiar with your scope and the many features a DSO can offer.

author: naldo
author_rank: Contributor
timestamp: February 08, 2017, 12:23:07 pm
content: Quote from: rf-loop on February 07, 2017, 04:42:03 pmThe value of the voltage "Vrms" would not be 70.7% of the value of the peak voltage "Vpp" ??

author: rf-loop
author_rank: Super Contributor
timestamp: February 08, 2017, 02:46:17 pm
content: Quote from: naldo on February 08, 2017, 12:23:07 pmNo.This is normal AC:As you see there is negative peak -a and then positive peak a (now add V after these -a and a)Do not mix Vpk and VppIf you example have tranformer ( transformador) and it output is 10V AC. With oscilloscope you see (more or less distorted) sine wave what have 14.14V negative peak and 14.14V positive peak. Vpk is 14.14V. Vpp is 28.28VIf you look it with AC voltage meter it display 10V~ and on the oscilloscope screen you see sinusoidal wave what is peak to peak over 28V.Think in this image a = 1Peak to peak 2V. We can say This AC have 2Vpp. And it is 0.707 Vrms.(Sinusoidal AC without DC offset: Vrms = Vpp/2 * 0.707 )I will now recommend you first read some basic fundamentals of electricshttps://pt.wikipedia.org/wiki/Corrente_alternada

author: naldo
author_rank: Contributor
timestamp: February 08, 2017, 09:13:33 pm
content: Good afternoon, great explanations, congratulations! Forum BALL SHOW .....

author: naldo
author_rank: Contributor
timestamp: February 09, 2017, 10:39:28 pm
content: Good evening ! One more question please: every time I calibrate the probe in "10X I will have to use 500ma and 1ms / div" (fixed value) or I can change to some other value. Every time I turn the device on, do I have to calibrate it and the probe ?? Thanks for 1 feedback!

author: tautech
author_rank: Super Contributor
timestamp: February 09, 2017, 10:44:27 pm
content: Quote from: naldo on February 09, 2017, 10:39:28 pmProbe compensation needs only be performed in 10:1 mode and a faster timebase setting should be used to see the peak of the rising edge in better detail.To save lots of swapping back and forth it's best to have probes and scope set to 10:1 and ONLY use 1:1 when needed. If you take note of the OSD for vertical resolution you will see it change automatically when 10:1 input attenuation is selected.

author: naldo
author_rank: Contributor
timestamp: February 09, 2017, 10:52:58 pm
content: Every time I turn the device on, do I have to calibrate it and the probe ??

author: tautech
author_rank: Super Contributor
timestamp: February 09, 2017, 11:54:09 pm
content: Quote from: naldo on February 09, 2017, 10:52:58 pmNot normally.I don't.In saying this the scope (like any scope) does not perform to full accuracy until operating temp is reached.This is why one should only perform a scope Self Cal after ~30 mins of operation.