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(3) Connecta short heavygauge wire betweenthe plus andminusjacksand adjustZEROcontrol until pointerrests exactlyoverzeromark on OHMS scale. (4) Remove short from testjacks.The.meter pointer will movefrom the left hand edgeof the meter(Zerc) toward the infinity (oo)mark on the right hand side of the meter.Rotate the OHMScontrol to adjustthe meter pointer to exactlythe infinity mark. (5) RepeatZERO and OHMSadjustments leastone more time to obtain at the bestaccuracy. (6) Makesolidconnections between jacksand device test beingmeasured and read resistance OHMS scale(if devicehasno leads,use short heavy on gauge wire). (7) Multiply resistance reading 0.1. For example, the meterreadsl0 by if ohms (center scale)the resistance being measured be l0 x 0.1 = I will ohm. NOTE It will be necessary readjustthe OHMSandZEROcontrolswhen to returningto the higherOhmsranges. e. MeasuringResistance Thermistors: The I.o OHMS function strould be of usedfor makingaccurate measurements resistances thermistors low of of of resistance value.If this measurement made in the HI OHMSfunction, a is changtrgresistance readingwill result due to heatingcaused the higher by currentflow throughthe thermistor. The thermistorstrould be held in the not hand and should be kept away from any other heat to obtain the most accurate fesistance indication. 7. MEASI,JRING CI.JRRENT: AC a. Setthe FUNCTIONswitchto the AC A position. b. Setthe PROBEswitchto DIRECT. c. Short test leadstogetherand rotate ZERO control until meterpointer rests overzeromark on VOLTS/MAscale. d. Set RANGE switch to the desired range. the approximate If valueof current flowing within the circuit is not known, set the RAf.lGEswitch to the l.5A position and work down toward the 50pA rangeuntil an accurate readingis obtiined. e. Turn the power to the equipmentunder test OFF and open the ciicuit in 'which you wistrto measure currentflow. Connectthe groundleadof the test lead assembly one sideof the circuit. Connectthe tip of the probeto the to other sideof the circuit undertest. f. Turn the power to the equipmentunder test ON and observe the meter pointer deflection. Set the RANGE switch to obtain the most accurate indication(nearest full scale). currentis readon the two red scales to AC just belowthe mirror scale the meter. on
