while screening of component how we can check OEN MAKE RELAY VIDE THEIR PART NO.67EP242C7 AS PER ATTACHED DATA SHEET.
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will u pl. reply in details refering catelogue how much voltage to be applied on which particular point & what sholud be correct result we should we get? as i am totally new for such type of relay.Apply the correct coil voltage, and see if the contacts changes over...
Are we going to do this for all the components in tour project? Please buy a book about quality testing electronic components. One about general electronics might also help. You need some practice on how to read Datasheets. Most actually show the test setup used.will u pl. reply in details refering catelogue how much voltage to be applied on which particular point & what sholud be correct result we should we get? as i am totally new for such type of relay.
sorry it is 67EP482C7 RELAY .pl. tell me what to be check for this relay i will forward result immediately.Ikctrajan, there are lots of things to test in a relay, but I'll guess that first you just want to know if the relay will click on-off. Your part number indicates that your relay is 67EP242C7, which means:
Series 67, type DC Power Adjusted Epoxy Sealed Metal Cover, a coil voltage of 24 VDC, with 2 poles, a Changer Over, and a 7 Amp rating on the contacts.
The data sheet seems to show that the coil resistance should be 90 ohms. So start by measuring the coil resistance with a multimeter.
It also seems to indicate that you only need 8 volts to click the relay, so use a 9 Volt battery and a couple of test leads (wires with clips on the ends) and wire the battery to the coil of the relay. Just touch one of the wires to the battery for a second, and you should hear the relay click.
To be safe, just measure the coil resistance and tell us what you get.
And by the way, this relay is optimized to switch DC current up to 7 Amps, but not for switching AC current.
as per catelogue drg. i checked at point 1 & 4 & result is 2500 ohm.No problem, please do the same thing recommended before. Start by measuring the resistance of the coil with a multimeter. The updated part number means you have a 48 volt coil, not 24. But let's check it to be sure.
first of all thanks for ur keen interest in my question & for giving detailed step wise answer.OK, good! You have a 48 volt coil. The data sheet says that this coil should work with at least 38.4 volts across it.
So you need a power source for about 40 to 48 volts, and at least 20 milliamps. You can get this with five 9 volt batteries connected in series.
Then you should be able to connect one end of the battery string to pin 1 of the relay, and the other end to pin 4, and you will hear the relay click. Release the connection, and the relay should click again.
If you get there, then use your multimeter to make sure the relay contacts are working. With the coil un-energized, put your multimeter leads across pins 5 and 6, and you should read a very low resistance value. Now energize the coil, and your reading should be an open circuit. Do the same thing on pins 8 and 9.
On pins 6 and 7 you should see the opposite. With the coil un-energized, your reading should be an open circuit. When you energize the coil, your reading should be a very low value. Same with pins 9 and 10.
The contact resistance you're measuring should be less than 50 milli-ohms (0.050 ohms). Anything higher, and you likely have burned contact points, and you should not use the relay.
Let us know what you find out, please.
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by Jake Hertz
by Jake Hertz