BULACAN STATE UNIVERSITY

CITY OF MALOLOS, BULACAN

COLLEGE OF ENGINEERING

EE – 311L

REPORT NO. 1

ELECTRICAL TOOLS AND MEASURING INSTRUMENTS

(PART – II)

SUBMITTED BY:

NAME: VALILA, MARY GRACE CATHERINE I.

C / Y / S: BS ECE 3B

SUBMITTED: JULY 23, 2015

SUBMITTED TO:

ENGR. DANIEL A. CRISOSTOMO

(INSTRUCTOR)

1st SEMESTER / S.Y. 2015 – 2016

EE – 311L

REPORT NO. 2

ELECTRICAL TOOLS AND MEASURING INSTRUMENTS

(PART – III)

IV. ELECTRICAL TOOLS AND MEASURING INSTRUMENTS – III

26. PIPE VISE

PIPE VISES ARE A PLUMBER'S TOOL, OFTEN USED TO HOLD PIPES IN PLACE FOR THREADING AND CUTTING. THERE ARE TWO MAIN STYLES: CHAIN AND YOKE. THE YOKE TYPE VISE USES A SCREW TO CLAMP DOWN THE PIPE, AND THE CHAIN STYLE USES A CHAIN FOR SECURING THE PIPE

27. BENCH VISE

A BENCH VISE IS A HOLDING DEVICE ATTACHED TO A WORKBENCH; HAS TWO JAWS TO HOLD WORKPIECE FIRMLY IN PLACE.

28. PIPE THREADER

A PIPE THREADER IS A TOOL USED TO THREAD PIPES WHEN UPDATES OR REPAIRS ARE NEEDED.

29. HICKEY

A HICKEY IS A TOOL THAT IS USED TO BEND TUBES AND PIPES

30. BLOW TORCH

A BLOWTORCH (USA USAGE), OR BLOWLAMP (RARE OR ARCHAIC), IS A FUEL-BURNING TOOL USED FOR APPLYING FLAME AND HEAT TO VARIOUS APPLICATIONS, USUALLY METALWORKING.

31. PUSH-PULL TAPE RULE

A TAPE MEASURE OR MEASURING TAPE IS A FLEXIBLE RULER. IT CONSISTS OF A RIBBON OF CLOTH, PLASTIC, FIBER GLASS, OR METAL STRIP WITH LINEAR-MEASUREMENT MARKINGS. IT IS A COMMON MEASURING TOOL. ITS DESIGN ALLOWS FOR A MEASURE OF GREAT LENGTH TO BE EASILY CARRIED IN POCKET OR TOOLKIT AND PERMITS ONE TO MEASURE AROUND CURVES OR CORNERS

32. TIN SNIP

TINNER'S SNIPS, ALSO KNOWN AS TINNER SNIPS OR TIN SNIPS, ARE ONE OF THE MOST POPULAR TYPE OF SNIPS. THEY ARE DEFINED BY THEIR LONG HANDLES AND SHORT BLADES. THEY USUALLY HAVE EXTRA WIDE JAWS AND ARE MADE OF DROP FORGED CARBON STEEL. DEPENDING ON THE SIZE OF THE BLADE, TIN SNIPS CAN CUT BETWEEN 24 AND 16 GAUGE COLD ROLLED LOW-CARBON TIN.

33. TEST LIGHT

A TEST LIGHT, TEST LAMP, VOLTAGE TESTER, OR MAINS TESTER IS A SIMPLE PIECE OF ELECTRONIC TEST EQUIPMENT USED TO DETERMINE THE PRESENCE OR ABSENCE OF AN ELECTRIC VOLTAGE IN A PIECE OF EQUIPMENT UNDER TEST.

34. FILE

A FILE IS A METALWORKING, WOODWORKING AND PLASTIC WORKING TOOL USED TO CUT FINE AMOUNTS OF MATERIAL FROM A WORK PIECE. IT MOST COMMONLY REFERS TO THE HAND TOOL STYLE, WHICH TAKES THE FORM OF A STEEL BAR WITH A CASE HARDENED SURFACE AND A SERIES OF SHARP, PARALLEL TEETH. MOST FILES HAVE A NARROW, POINTED TANG AT ONE END TO WHICH A HANDLE CAN BE FITTED.

35. ELECTRICAL MEASURING INSTRUMENT

35.1 VOLTMETER

A VOLTMETER IS AN INSTRUMENT USED FOR MEASURING ELECTRICAL POTENTIAL DIFFERENCE BETWEEN TWO POINTS IN AN ELECTRIC CIRCUIT. ANALOG VOLTMETERS MOVE A POINTER ACROSS A SCALE IN PROPORTION TO THE VOLTAGE OF THE CIRCUIT; DIGITAL VOLTMETERS GIVE A NUMERICAL DISPLAY OF VOLTAGE BY USE OF AN ANALOG TO DIGITAL CONVERTER.

35.2 AMMETER

AN AMMETER IS A MEASURING INSTRUMENT USED TO MEASURE THE ELECTRIC CURRENT IN A CIRCUIT. ELECTRIC CURRENTS ARE MEASURED IN AMPERES (A), HENCE THE NAME. INSTRUMENTS USED TO MEASURE SMALLER CURRENTS, IN THE MILLIAMPERE OR MICROAMPERE RANGE, ARE DESIGNATED AS MILLIAMMETERS OR MICROAMMETERS

35.3 OHMMETER

AN OHMMETER IS AN ELECTRICAL INSTRUMENT THAT MEASURES ELECTRICAL RESISTANCE, THE OPPOSITION TO AN

ELECTRIC CURRENT. MICRO-OHMMETERS (MICROHMMETER OR MICROOHMMETER) MAKE LOW RESISTANCE MEASUREMENTS. MEGAOHMMETERS (AKA MEGAOHMMETER OR IN THE CASE OF A TRADEMARKED DEVICE MEGGER) MEASURE LARGE VALUES OF RESISTANCE. THE UNIT OF MEASUREMENT FOR RESISTANCE IS OHMS (Ω).

35.4 WATTMETER

THE WATTMETER IS AN INSTRUMENT FOR MEASURING THE ELECTRIC POWER (OR THE SUPPLY RATE OF ELECTRICAL ENERGY) IN WATTS OF ANY GIVEN CIRCUIT. ELECTROMAGNETIC WATTMETERS ARE USED FOR MEASUREMENT OF UTILITY FREQUENCY AND AUDIO FREQUENCY POWER; OTHER TYPES ARE REQUIRED FOR RADIO FREQUENCY MEASUREMENTS.

35.5 FREQUENCY METER

A FREQUENCY METER IS AN INSTRUMENT THAT DISPLAYS THE FREQUENCY OF A PERIODIC ELECTRICAL SIGNAL. FREQUENCY IS MEASURE IN HERTZ.

35.6 GALVANOMETER

A GALVANOMETER IS A TYPE OF SENSITIVE AMMETER: AN INSTRUMENT FOR DETECTING ELECTRIC CURRENT. IT IS AN ANALOG ELECTROMECHANICAL ACTUATOR THAT PRODUCES A ROTARY DEFLECTION OF SOME TYPE OF POINTER IN RESPONSE TO ELECTRIC CURRENT THROUGH ITS COIL IN A MAGNETIC FIELD.

35.7 HYDROMETER

HYDROMETER IS AN INSTRUMENT USED TO MEASURE THE SPECIFIC GRAVITY (RELATIVE DENSITY) OF LIQUIDS; THAT IS, THE RATIO OF THE DENSITY OF THE LIQUID TO THE DENSITY OF WATER. HYDROMETERS MAY BE CALIBRATED

FOR DIFFERENT USES, SUCH AS A LACTOMETER FOR MEASURING THE DENSITY (CREAMINESS) OF MILK, A SACCHAROMETER FOR MEASURING THE DENSITY OF SUGAR IN A LIQUID, OR AN ALCOHOLOMETER FOR MEASURING HIGHER LEVELS OF ALCOHOL IN SPIRITS.

35.8 OSCILLOSCOPE

AN OSCILLOSCOPE, IS A TYPE OF ELECTRONIC TEST INSTRUMENT THAT ALLOWS OBSERVATION OF CONSTANTLY VARYING SIGNAL VOLTAGES, USUALLY AS A TWO-DIMENSIONAL PLOT OF ONE OR MORE SIGNALS AS A FUNCTION OF TIME. NON-ELECTRICAL SIGNALS (SUCH AS SOUND OR VIBRATION) CAN BE CONVERTED TO VOLTAGES AND DISPLAYED.

35.9 SPEEDOMETER

A SPEEDOMETER OR A SPEED METER IS A GAUGE THAT MEASURES AND DISPLAYS THE INSTANTANEOUS SPEED OF A VEHICLE. NOW UNIVERSALLY FITTED TO MOTOR VEHICLES, THEY STARTED TO BE AVAILABLE AS OPTIONS IN THE

1900S, AND AS STANDARD EQUIPMENT FROM ABOUT 1910 ONWARDS.

35.10 MEGGER

A MEGGER IS A SPECIAL TYPE OF OHMMETER USED TO MEASURE THE ELECTRICAL RESISTANCE OF INSULATORS. INSULATING COMPONENTS, FOR EXAMPLE CABLE JACKETS, MUST BE TESTED FOR THEIR INSULATION STRENGTH AT THE TIME OF COMMISSIONING AND AS PART OF MAINTENANCE OF HIGH VOLTAGE ELECTRICAL EQUIPMENT AND INSTALLATIONS.

A.)MEGGER (HAND CRANKED)

IS A TYPE OF MEGGER THAT HAS A CIRCULATING SHAFT TO ADJUST SUCH MEASUREMENT.

B.)MEGGER (AUTOMATIC)

IS A TYPE OF MEGGER THAT IS AUTOMATIC AND IS USED FOR ITS CONVENIENCE.

C.)MEGGER (TRANSISTORIZED)

IS THE MOST COMMONLY USED MEGGER. IT IS ALSO THE MOST SENSITIVE MEGGER.