Thursday, June 16, 2011

Practice Back-Probing Connectors on The Bench

Note: Part of this practice is to make sure you do not damage terminals and connectors when doing electrical testing. Your score for this exercise depends on whether or not you damage the terminals and connectors.

Check the box at the end of each step when it is completed:
If you have problems with the task, see you lecturer for help.

Warning: be careful of puncturing yourself with the pins. Wash and disinfect area if you puncture yourself.

Lets start with simple review of using multi-meters
1.0 Meter reading Ohms with wires not connected
1.1 Turn on meter, set it to measure ohms, make sure the leads are not touching anything (open circuit). Record the readout on your meter: Open Loop.
1.2 Describe what the readout above means when doing electrical testing: Infinity.

2.0 Meter reading Ohms with wires connected
2.1 Meter on, set to Ohms, touch leads together and record the readout on your meter: 0.1Ω-0.2Ω.
2.2 Describe what the readout above means when doing electrical testing: Read the resistance inside the multimeter.

This skill is one you need to be able to do in the workshop working on cars, so we start by practicing them on the bench:
3.0 Practice back probing connectors
3.1 Find a hard shell connector, with the attached terminals and wires that you can test.
3.2 Back probe a wire on one side, probe gently from the front on the other side, and measure the resistance. Record the reading: 0.4Ω.
3.3 Do you know you made a good connection with the wire? And describe how you know?
Clamp the wire and connector properly. Should be the resistance very very low close to 0Ω and reading on the multimeter stable not up & down.
3.4 Demonstrate back probing without damage to anything for your lecturer and have him sign you off here: by Scott.

No comments:

Post a Comment