ELECTRICAL BASIC HAND SKILLS

WORK SHOP SAFETY FOR HAND TOOLS
  • I should select the proper tool for the job.
  • I must be sure it is in good condition e.g. cutting edges sharp, handles secured firmly.
  • I must use the tool correctly.
  • I should store tools in the proper place at the end of each shift.

Once I have selected the proper tool for the job I am doing, I should check it over. Is it in good shape? Is the cold chisel end burred? Is the pick or hammer handle secured and free of splinters? Is the handsaw blade sharp? I must be sure to turn in defective tools for immediate repair, but do not forget even a good tool must be used properly. So here are some precautions I should remember when using some of common tool
  •  I must never use a file as a pry/crowbar. I should keep the file clean to prevent it from slipping.
  • I must be sure the hammer has a securely wedged handle suited to the type of head, and inspect for splinters. Remember carpenter or claw hammers are designed primarily for driving and drawing nails. I should never use it to strike cold chisel or other hardened steel tools because heads are so tempered that they may chip and cause serious injury.
  •  I must be sure the adjusting screws are free of rust, and place the wrench on a nut in the direction the handle is to move. I must never use a wrench as a hammer.
  •  During the day, I must keep the tools not in use out of the walk way so they won’t be tripping hazards.

Power tools present greater injury potential than hand tools. The most frequent injuries involving power tools are cuts, punctures, electric shock, burns and eye damage.  I should follow these general safety rules for power tools:
  • I should know my power tool – Learn the applications and the limitation of the tools as well as the potential hazards specific to the tool.
  • I must ground all tools – if a tool has a three prong plug, it should be plugged only in to a three prong receptacle. If an adapter must be used to accommodate a two prong receptacle, I should attach the adapter wire to a known ground. I must never attempt to remove the third prong.
  • Avoid dangerous environments – Do not use power tools in damp or wet locations without proper grounding protection. Keep your work areas well lighted.
  •  Do not force tools – Do not force a small tool or attachment to do the job of a heavy duty tool.
  • Wear proper clothing – Loose clothing or jewelry can get caught in moving parts. Proper gloves and footwear are recommended.
  • Wear safety glasses when working with power tools – Wear appropriate eye, face and respiratory protection if cutting operations that produce dust.
  • Do not abuse cords – Never carry a tool by its cord or yank the cord to disconnect the tool from the receptacle. Keep the cord away from heat and sharp edges.
  • Secure the work – Use clamps or vices to hold the work. It is safer than using your hands and it frees both hands to operate the tool.

Avoid accidental starting – Do not carry a plugged in tool with your finger on the switch

LONG NOSE PLIER

  • I have used the tip of this tool to bend or shape the wires of components when soldering on the PCBs, by placing the component wire inside the teeth and grasping the wire with my other hand. The plier acts as a vice to hold the wire in one spot while I bend the wire with the other hand.
  •  I have also used the tool to cut wires of components when soldering on the PCBs, I placed a component wire inside the cutter that is located under the nose and above the handle and close the plier tightly to serve the wire.
  • The tip of the plier was also useful in gripping small components that I could not grip with my hands when populating PCBs.

SIDE CUTTER










  • I have used this tool to cut wires of components after soldering on the PCBs, I placed the component wire between the diagonal jaws and close the plier tightly to serve the wire.
  • I have also used this tool for gripping, wire splicing and insulation stripping when assembling jeuomont power supply.
  • During the process of cutting wire I have made note that if the jaws of the plier touch the bare the wire becomes nicked and therefore weakened.



SPANNER
  • I have used this spanner to tighten the nuts and bolts on the wheel detector and also to mount the transformer on jeumont power supply by providing a tight grip on the bolt.
  • I have made note that the size of the spanner used is determined by the size of the object that needs to be adjusted.
  • Also that the ring side of the spanner provide stronger grip than the open ended. The ring can also be used to fit tightly around hexagonal or square shape and are designed to grip the corners of a nut or bolt.

SCREWDIVER
  • I have used this tool to install and tighten screw of the DIN connector on the PCBs of relay interface card, Digital input card (S2/DIP22) and Digital output card (S2/DOP22) before soldering.
  • The tool was also useful when mounting the PCB of the jeumont power supply with the transformers during assembly.
  • It is always important to use the correct screwdriver as the type and size of the screw determines the type and size of the tool, this will help prevent and minimize damage between the two objects.

 TWEEZER
  • This tool was essential when picking up small components that are not easily handed with human hand or pliers.
  • I have used this tool when I was populating relay interface cards on the PC boards, to pick up and place small (SMD) components such as capacitors, resistors and diodes. 
WIRE STRIPPER
  • I have used wire stripper to remove insulation from the tip of the electrical wires before I solder them to the military cable of the wheel detector, this was done by placing the wire in the jaws and squeezing the handle while pulling the stripper towards myself.
  • I also used this tool to remove insulation from the wire before assembling and wiring PCB to other components on the Jeumont power supply, receiver and transmitter.
CABLE SHEATH STRIPPER
  • I have used the sheath stripper to remove the outer layer (sheath) of the wheel detector cables before assembly, I applied force to the handle in the upwards direction while placing the cable in the desired length below it, aside the razor and move the stripper back and forth in a 95 degree angle.
  • I also used this tool to remove the sheath of the Ethernet cable before putting the boot and RJ 45 socket.

CRIMPER
  • I have used this tool to trim the network cable to size by means of attaching cable cutter, this was done by inserting the free end of the category 5 cabling between the network crimping tool wire cutter blades, and pulling approximately one foot of cabling through gap between the wire cutter blades.
  • I also used this tool to attach the RJ-45 connectors to the network cable, I slipped the wires into the RJ-45 connector with the prong facing downwards. Push the wires all the way to the end of the plug. Slip the crimping tool socket over the RJ-45 connector, and squeeze hard to crimp the plug.

DIGITAL MULTIMETER
  • The multimeter was used to trace tracks on the FSU and Hot box ADC micro card PC Boards during repairs by buzzing which is also referred as continuity check.
  • I have also used this instrument to check components values before populating on the PCBs.

LOGIC PROBE
  • This logic probe was used when I was testing SAM7-200 cards to check status change in RS232 driver and RS232 diagnostics by applying the logic probe to MAX232 IC input and output and take note if there are any changes from input to output.

SOLDERING IRON
  •  I have used this soldering iron to populate relay interface card, Digital Input Card (S2/DIP22), Digital Output Card (S2/DOP22) and replace components during repair of the FSU (Filament Switch Unit), Bolometer sensor, Bolometer power supply, Hot box ADC micro card and Dc snubbing unit.

Comments

Popular posts from this blog

BASIC KNOWLEDGE OF A REFRIGERATION PLANT

State space, Transfer function, state response adjoint, inverse output, input.

Supervisory Control and Data Acquisition (SCADA)