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dronai dronai is online now

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Showing Visitor Messages 1 to 10 of 26
  1. Jon.N
    08-20-2017 04:56 AM - permalink
    Jon.N
    Hello,

    My name is Jonathan and I am located in Orange County. I am very eager to learn the trade. I have 10 years of experience in restaurants with 3+ years as a manager. I am accustomed to physical work and being on my feet all day. I would like to start an apprenticeship as soon as possible. Please let me know if you have any opportunities available. I have a reliable car and am prepared to travel throughout LA/OC/IE/SD.

    Thank you,

    JHN
  2. mark0353
    09-15-2015 12:20 PM - permalink
    mark0353
    hello
    I am poe switch manufacturer from shenzhen china, do you interesting work with me?
    if that pls contact me by mail:[email protected]
  3. ELadra8869
    09-20-2014 01:47 PM - permalink
    ELadra8869
    Hey there! My name is Emil and I'm an IBEW electrician from Local #24(Balto.,MD chapter). I'm looking to relocated to California w/ my family and wanted to know a little about the local there. I'm looking into moving somewhere near San Francisco so I'm doing a bit of research. Any and all info or contacts you can provide would be greatly appreciated. Thank you ^ ^
  4. dronai
    12-27-2013 11:18 PM - permalink
    dronai
    Take a look on my profile under albums
  5. 8V71
    12-27-2013 08:03 AM - permalink
    8V71
    There may be some confusion about what scope that you have. Every picture of a 2247A that I see is showing the volts/division and sweep rate on the bottom of the display. There is usually an intensity knob to adjust the brightness or turn them off. I meant read your manual to see all of the features and how to operate your scope, not how to read a waveform.

    There are plenty of RMS/Peak/Peak to Peak calculators and info on the web to help you understand. The reading that you gave me was peak to peak so I commented on peak to peak. If you had given me a peak only reading then we would of talked about peak at 170 volts.

    Here is a nice image of a sine wave and the different multipliers for average, rms, peak, peak to peak.

    http://www.dytran.com/img/tech/a13.pdf
  6. dronai
    12-27-2013 12:59 AM - permalink
    dronai
    OK, I will go test the Generator now that I understand. The example in my book is not showing to multiply the answer by two because of peak to peak voltage. I did get a manual with the scope, but my textbook explained what and how better than the manual. Thanks for the help
  7. 8V71
    12-27-2013 12:51 AM - permalink
    8V71
    170 volts peak is just half the reading from the center line of the display. For 120 volts line voltage, which is measured in RMS, the total peak to peak is double the 170 volts or 340 volts. Your scope is reading 50 volts per division so what you are seeing (6.2 divisions) is close to being correct. 6.8 divisions would be more correct. Trust your meter for voltage, trust the scope for the (close enough) frequency.

    It would be a very good idea to get a operators manual for the scope. There may be a LOT more functions that you are not aware of, including an accurate frequency counter.

    I hope you will post some pics of the waveform on your thread so we can see why your meter was reading 180hz.
  8. 8V71
    12-25-2013 07:39 AM - permalink
    8V71
    I dont know what special functions your scope has so I will talk about the similar scope that we have at work. The easiest way is to adjust your volts/division so the waveform fits comfortably in the display. Since you are dealing with relatively high voltage make sure you dont exceed the max input rating of the scope. Start at the largest volts per division (all the way counter clockwise I think) and go from there. 60hz is about 16 milliseconds per cycle so adjust the sweep speed so you can easily measure it. At whatever sweep speed that you select, do the math and see if the complete cycle occupies about 16ms of time.

    If you want to get fancy, turn on the vertical cursers. Move the cursers to exactly the start and end of one cycle and the scope will read the frequency for you. Your scope might display the frequency automatically or maybe has a built in counter? I just dont know.

    Merry Christmas or Happy Holidays dronai
  9. tedshark
    12-18-2013 07:24 PM - permalink
    tedshark
    Everything takes time, and you definitely need to have access to the equipment to learn the different things.
    I myself am trying to get into ammonia refrigeration, I have some experience with it, but I did not get into it much on one of my jobs, I did not like being around something so deadly and dangerous, but I always do good with most jobs, and this is what I want to do until I retire.
    I still need to get the job.
  10. tedshark
    12-17-2013 08:01 PM - permalink
    tedshark
    plumbing, of steam, air, water, chemicals, gases, fabrication, welding, lubrication, machine work, lathe, mill, operating production equipment, monitoring equipment, trouble shooting, programming, PLC, VFD, calibration of sensors, a maintenance mechanic, technician, can pretty much try and repair anything, pay if good, one day you might be sitting at a computer, the next unplugging a sewer line, never know whats in store for you.

About Me

  • About dronai
    Professional Biography
    Residential, Commercial Electrician Since 87 & Industrial Since 2012
    LAX
    What is your electrical related field/trade:
    Electrical Contractor Since 1989
    General Location
    California
    Occupation
    Service Electrician, Industrial
  • My Company
    Service Area
    Orange County,Los Angeles County Ca.

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General Information
  • Last Activity: Today 12:06 PM
  • Join Date: 04-11-2011
  • Referrals: 0

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Mentions

11-02-2019
02:27 PM - dronai mentioned MechanicalDVR in post Home made foods
...ight !!! Nice work MechanicalDVR

Quotes

11-28-2019
11:26 AM - dronai quoted HackWork in post Best way to bore out a hole in concrete
Any basic SDS Max rotary hamm...
11-27-2019
06:57 AM - gpop quoted dronai in post Relay Logic vs Ladder Logic - instruction order
You must have a mechanical ...
12:20 AM - dronai quoted Navyguy in post Relay Logic vs Ladder Logic - instruction order
OK, I am just not used to re...
12:14 AM - Navyguy quoted dronai in post Relay Logic vs Ladder Logic - instruction order
Yep, Field wiring E-stop N/...
12:02 AM - Navyguy quoted dronai in post Relay Logic vs Ladder Logic - instruction order
Opposite, N/C E-Stop, N/O P...
11-26-2019
11:31 PM - dronai quoted Navyguy in post Relay Logic vs Ladder Logic - instruction order
I understood that you wire t...
10:55 PM - Navyguy quoted dronai in post Relay Logic vs Ladder Logic - instruction order
I think we are saying the s...
10:49 PM - dronai quoted Navyguy in post Relay Logic vs Ladder Logic - instruction order
It is pretty rare that you w...
10:46 PM - Navyguy quoted dronai in post Relay Logic vs Ladder Logic - instruction order
You must have a mechanical ...
10:00 PM - dronai quoted gpop in post Relay Logic vs Ladder Logic - instruction order
In relay its easier to ch...
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11-25-2019
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11-24-2019
07:21 PM - dronai quoted eddy current in post Load calculation sub panel
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07:07 PM - dronai quoted Wavelet8 in post Line side taps clarified
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