| ??? 08/20/05 13:18 Read: times |
#99725 - Do some research Responding to: ???'s previous message |
The bulb technique has been used for many years for RF - so I think 80kHz is not an issue. Obviously thermal inertia needs to be factored in, but is not insurmountable. If you make a test rig, I'm sure you will be able to characterise the device and get reliable readings from it. I'm sure Analog Devices has some parts that will work at 80kHz. So don't reject these suggestions without doing some research. Think laterally. The solution to your problem may be simpler than you think. This device is good for 450kHz: http://www.analog.com/en/prod/0...%2C00.html Think carefully about your problem and what you're trying to measure. Make a test rig to simulate the waveform you're trying to measure (scaled down) and try the different techniques suggested. I'm sure you will, at the very minumum, come to understand your problem. You could also get a digitised sample of the real waveform and perform maths on it to come up with the theorectical rms value to compare with your measurements. |
| Topic | Author | Date |
| rms value of current for induction heat | 01/01/70 00:00 | |
| Use a true RMS meter! | 01/01/70 00:00 | |
| On second thoughts.... | 01/01/70 00:00 | |
| On second thoughts.... Give third too.. | 01/01/70 00:00 | |
| Service problem! | 01/01/70 00:00 | |
| thermal effects | 01/01/70 00:00 | |
| power metering | 01/01/70 00:00 | |
| Elegant | 01/01/70 00:00 | |
| Never had a need! | 01/01/70 00:00 | |
| bulb, power, etc. | 01/01/70 00:00 | |
| Bolo-` | 01/01/70 00:00 | |
| yes I know | 01/01/70 00:00 | |
| A resistor | 01/01/70 00:00 | |
| Thermal Inertia. | 01/01/70 00:00 | |
| there is a bunch of recently relased ele | 01/01/70 00:00 | |
| all methods are for 50hz | 01/01/70 00:00 | |
| Do some research | 01/01/70 00:00 | |
| analogy | 01/01/70 00:00 | |
Hall Generator for power measuring | 01/01/70 00:00 |