2006-10-19 02:23:36 · 8 answers · asked by meetantacheri 1 in Science & Mathematics ➔ Engineering
Milli volt drop tester is a tester which measures the voltage drop between the two test points. In effect it is a D.C digital voltage producer which will measure the voltage drop between the test points at a constant current. Usually it has two scales for amperes 0 to 20amp and 10 to 100 amps. The ranges of the voltage are: 19.9,199.9 and 1999 mv.
2006-10-19 08:00:22 · answer #1 · answered by Mesab123 6 · 0⤊ 0⤋
Millivolt Drop Test
2016-12-10 16:18:43 · answer #2 · answered by Anonymous · 0⤊ 0⤋
One use of a millivolt drop test is to check the resistance of the windings on a commutator of the 'armature' (the central rotating part of an electrical machine).
The contacts of the millivolt tester are made across two of the copper commutator segments and measurements taken, the armature is rotated by one segment and the procedure repeated.
If the readings are in tolerance, then the armature is OK.
A similar process can be used to check the serviceability of contacts in a relay - burt a millivolt drop tester wouldn't be used. Instead a load current would be passed through the contacts with them closed and a voltmeter used to check the voltage drop across them, which should be in millivolts.
2006-10-23 09:14:37 · answer #3 · answered by Bill N 3 · 0⤊ 0⤋
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Millivolt drop tests are performed across the crimp joint to determine the electrical characteristics. The test current is passed through the contacts and voltage drop is measured from a point on the shoulder of the contact to a point on the wire. Voltage drop values within the maximum allowable indicate a good electrical joint.
2016-04-03 03:23:48 · answer #4 · answered by Anonymous · 0⤊ 0⤋
You might want to perform a milli-volt drop test, if you wanted to get an idea how much heat was being generated at a connection point.
This would enable you to determine if the connection was a good one.
If you know the current going through that connection and the milli-volt drop across that connection, then you can calculate the amount of generated heat.
You would then decide if it was necessary to 're-make' the connection. This would cause the milli-volt drop to fall. (lower is better).
I used to do this when I was a marine engineer.
2006-10-25 01:27:13 · answer #5 · answered by Anonymous · 0⤊ 0⤋
This is just another name for measuring the voltage drop along a conductor (wire) The "milli" means 1/1000 of a volt.
2006-10-25 13:21:08 · answer #6 · answered by Sam 4 · 0⤊ 0⤋
Take a handfull of millivolts and hold them 5 feet from the ground. Drop them and time how long it takes for them to hit the ground.
2006-10-19 10:41:39 · answer #7 · answered by Jeffrey S 6 · 0⤊ 2⤋
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2006-10-19 02:33:31 · answer #8 · answered by liongirl_40 3 · 0⤊ 0⤋