![]() ![]() Since you essentially are measuring spark generators they should do the job. They will add some parasite capacitance so of course it's a tradeoff.Īlternatives: you can make a capacitive divider (even bigger and funnier) or maybe you could try with the probe used by auto shops for checking spark ignitions (usually capacitive pickups too). Due to these modes, piezoelectric materials have found considerable use in both sensors and actuators and are often called smart or intelligent materials. If you are worried about protecting your scope from wandering voltages (these are common with high voltage pulses) I recommend some varistor/TVS combination on the low side (and maybe a GDT for good measure). Piezoelectrics either produce a voltage in response to mechanical stress (known as direct mode) or a physical displacement as a result of an applied electrical field (known as indirect mode). TOD boards,Step 3: While holding the knob, press the piezo igniter button at the same time. If a spark is present every time the igniter is pressed, the piezo igniter is fine, if no spark is seen, replace the piezo igniter. I did an ignition transformer test fixture with them some years ago) Use a Multimeter to check the voltage drop across the valve. Connect the piezo igniter to the electrode (figure 3), holding the electrode about to away from the shell of the heater with the insulated pliers depress the piezo igniter. Ohmite for example has multiple lines of these. You can identify an high voltage resistor easily since they are quite long (some of these are about 10cm) for clearance/creepage purposes. Power is not an issue in that application, piezo generators are relatively weak, however you may want to make something like a 1:1000 or 1:10000 divider. However you can do it quite safely making a voltage divider with suitable resistors. ![]() There are dedicated HV probes for that kind of work but the price is outside most people budget. Capacitance : min 20pF/1Khz Durability : 30 000 cycles / min output 12KV Heat resisitance : 100C 24Hrs / output drop Humidity resistance : 60 60C. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |