Hand/power tools, measuring instruments, and maintenance

DOE-HDBK-1011 Vol.4 §14-1

Test instruments for distribution maintenance Maintaining a distribution system depends on correct use of test instruments. The multimeter (analog VOM or digital DMM) measures voltage (connected in parallel across the points, high input resistance to avoid loading), current (connected in series, or via a clamp/CT for large currents, low insertion resistance), and resistance (on de-energized, isolated circuits only, using the meter's own source). The wattmeter reads true power directly by combining a current coil and a voltage coil, so it accounts for power factor, and on switchboards it is fed through CTs and PTs. The megohmmeter (megger) applies a high DC test voltage (commonly 500-1000 V) to read insulation resistance in megohms, the primary test for motor, generator, cable, and switchg…

NAVEDTRA 14256 — Care of Electric Powertools

In order to achieve and maintain maximum performance, all electrical power tools must be given proper care. The following is a list of guidelines that will help keep your power tools in a “ready to use” condition. 1. Keep all power tools, especially the housing intake and exhaust holes, clear and free of dust and dirt at all times. 2. Examine power tool cords for exposed loose wires and for damaged insulation. 3. 4. 5. 6. 7. Wipe power cords frequently to prevent deterioration from oil or grease. Check cord plugs for loose prongs or cracked casings. Never hold or drag electrical tools by the cord at any time. To prevent rusting, apply a light coat of oil to cutting surfaces of tools. Store power tools in properly designated containers’ when not is use. 52-13/(52-14 blank) Chapter 53 MISCE…

NAVEDTRA 14256 — Care of Miscellaneous Measuring Tools

1. Clean all tools thoroughly after using. 2. Apply a light coat of oil to all exposed metal parts to avoid rusting. 3. To avoid possible damage to sensitive tools, store tools in proper locations. 9-3/(9-4 blank) Chapter 10 LEVELS

NAVEDTRA 14256 — Course Objectives

In completing this nonresident training course, the student will demonstrate a knowledge of the use and care of various hand tools and measuring tools by correctly answering questions on the following: the types and uses of a large number of hand tools, safety precautions that must be followed when using hand tools, general care of hand tools, and repair procedures for some of the hand tools. Student Comments Course Title: Tools and Their Uses NAVEDTRA: 14256 We need some information about you: Rate/Rank and Name: Street Address: Your comments, suggestions, etc.: SSN: City: Date: Command/Unit State/FPO: Zip Privacy Act Statement: Under authority of Title 5, USC 301, information regarding your military status is requested in processing your comments and in preparing a reply. This informati…

NAVEDTRA 14256 — Ear Protection

Proper hearing protection is a must when working with or around certain types of power tools. Some tools are capable of producing dangerously high noise levels which, if ignored, can result in serious hearing loss or injury. Use the hearing protection regularly. Chapter 3 READING MEASURING SCALES The following chapter is designed to provide a basic understanding of how to read scales, dials, and gages. It will not provide any information on the actual use of the tools. Reference to this chapter will be made throughout the remainder of the manual. INDEX Item Page Reading the scale of a rule or tape . . . . 3-1 Reading a metric rule . . . . . . . . . . . . . . . . 3-3

NAVEDTRA 14256 — How to Use This Manual

When you need information about a specific tool or operation, simply refer to the alphabetical index at the end of the manual and turn to the pages that apply. The introduction to each tool chapter will furnish information on: How to choose and use the tools covered, the various types of tools available, and an example of their use. Instructions on the care of tools and safety precautions follow. 1-1/(1-2 blank) Chapter 2 SAFETY