GOOD LUCK, you will need a whole lot of it.

 

GOOD LUCK, you will need a whole lot of it.

with your help
I will have all the luck in the world
Thank you your support

 

I assume without knowing you have a British 240 VAC 50 Hz line is this what you are dealing with?

 

I assume without knowing you have a British 240 VAC 50 Hz line is this what you are dealing with?

respectfully --whats with the uk 240 Volts THATS NOT IN QUESTION-Please talk English with common sense .
All I had asked for help (( as I have seen all who on this forum do write about their elctronic problems and these people do get help ''True''.
At the start all I had ask of this forum for help ,,,
By telling I wanted:- by using DC/AC volts mixed with DC/AC Current to make a Watt meter
[[all I get is insulted]] use this in connection with a Wheatstone bridge to help me sort out loads of mixed signal diode and loads of mixed rectifiers-to match these by using a Wheatstone bridge ,,,
Not to be insulted ..
Ok whats the reason I am being insulted no help when all the 100 threads do get help and i get abused something is very wrong with this forum this is true ...

 

respectfully --whats with the uk 240 Volts THATS NOT IN QUESTION-Please talk English with common sense .
All I had asked for help (( as I have seen all who on this forum do write about their elctronic problems and these people do get help ''True''.
At the start all I had ask of this forum for help ,,,
By telling I wanted:- by using DC/AC volts mixed with DC/AC Current to make a Watt meter
[[all I get is insulted]] use this in connection with a Wheatstone bridge to help me sort out loads of mixed signal diode and loads of mixed rectifiers-to match these by using a Wheatstone bridge ,,,
Not to be insulted ..
Ok whats the reason I am being insulted no help when all the 100 threads do get help and i get abused something is very wrong with this forum this is true ...

You are very adamant about usnng an AC/DC bridge to sort out your diodes but you have not told us where on the bridge you want to measure the wattage or how the result will be used. I have over 60 years of experience in making electronic measurements and I have no idea how measuring the wattage in any part of a bridge circuit could be used to compare diode characteristics. Can you explain this in a little more detail please? We can not answer your questions if you do not give us enough information to work with.
There are a number of ways you can measure wattage, as I have already stated but which method you use will be determined by your application. Although I have asked you several of times, you still have not let us know what accuracy, resolution and speed of response is required.
I get a little frustrated when I do my best to try to help someone but all they do is put obstacles in my path and then complain about my lack of response!

 

KW iis correct about measurements. In all of my extended engineering career the only discussion concerning diodes and wattage has been about power dissipation and heat generation. When reading wattage there is one expression with two unknowns. So the rest of us get confused when measuring wattage relative to a bridge application is mentioned.
Looking at diode data sheets we see voltage and current and temperature but we do not see wattage. That is where all who have commented get left behind.

 

I assume you are measuring the power of an appliance. As it happens their are many types of Watt meters. First we must define what you are measuring. Line voltage in the USA is 120VAC (Volts Alternating Current) at 60Hz (Hertz). Britain uses 220VAC at 50Hz. If this still Greek to you, understand this basic beyond just being a beginner. You have some serious learning to catch up on. We will help get you up to speed if you desire, but please loose the attitude.

A good Reference:
Lessons in Electric Circuits

 

I assume you are measuring the power of an appliance. As it happens their are many types of Watt meters. First we must define what you are measuring. Line voltage in the USA is 120VAC (Volts Alternating Current) at 60Hz (Hertz). Britain uses 220VAC at 50Hz. If this still Greek to you, understand this basic beyond just being a beginner. You have some serious learning to catch up on. We will help get you up to speed if you desire, but please loose the attitude.

A good Reference:
Lessons in Electric Circuits

Wendy, read posts #26 and #33, they describe briefly the intended application. It is unusual, different from what I have seen before. AND I just came up with a cheaper alternative that will be better than a wattmeter, providing better results. The switching will be complicated but the measuring will be quite simple. AND not so expensive.

 

A DVM (Digital Voltmeter) will measure both voltage and current, though not at the same time. So will a VOM (Volt-Ohm meter). Thing is I had a laser printer that I needed to know how much juice it was using for a UPS (Uninterruptible Power Supply) so I ordered this. Thing is it is for the USA power line standard so would be useless for Britain or the EU. So again are you going to use this for an appliance or what?

You may notice I am spelling out all the abbreviations to allow you to follow what I'm saying. This isn't High level tech jargon.

 

I am a woman who survived a stroke and is paralyzed on my left side. I survive on a fraction of what I used to, and am learning to cope. Most people are here because they love electronics and aren't paid a thing. This describes our moderator staff. Electronics and electricity can be dangerous, but is an excellent way to stretch you mind. I love to build things.

 

A single high impedance meter can be switched to read across shyunts on each of two bridge legs , as well as thr voltage across the diode in each of two bridge legs. THAT will provide a simple way of gaining a lot of information about the diodes being checked. Multiplying those numbers to get watts will leave you with NO USEFUL information. Theonly special circuit will be the switching arrangement. OR get a bit more expensive and use two high impedance meters and read volts and milliamps at the same time. You may need range-change switching for the meters, not a big deal.

 

It is if you are not familiar w/ electronics. My thought is our TS isn't.

 

It is if you are not familiar w/ electronics. My thought is our TS isn't.

That is probably the case, but since one big part of this forum is helping others with answers to questions, that is OK. And I do try to provide useful answers. Ialso try to tell when an answer is a guess, and when an answer is based on a guess..
In this instance, " Oh Well."