TM 9-2350-261-20-1STE/ICE-R TEST 90 DC CURRENT 0 TO 1500 AMPSINITIAL SETUPTools:STE/ICE-R Test Set (Item 71.1, App D)Personnel Required:Unit MechanicReferences:See your -10TM 9-4910-571-12&PEquipment Conditions:Engine stopped (see your -10)Carrier blocked (see your -10)STE/ICE-R power hooked up (page 3-275)STE/ICE-R starter circuit test hooked up(page 3-279)1.2.3.4.5.NOTENOTEIf current probe is below room temper-ature, wait at least 5 minutes after con-necting probe to VTM before doing offsettest, or perform offset within 30 secondsof starting each measurement.Perform offset test.Stray magnetic fields can affect thecurrent reading. Such fields may existwithin a foot or so of operating vehiclegeneratorsand alternators, motorgenerators under load, and electricmotors. Keep current probe at least onefoot away from any operating generators,alternators, or electric motors.a. Set TEST select switches to 90.b. Push and hold TEST button until CALappears. Release TEST button.c. If VTM reads between -225 and +225,7. During offset test, the component being testedmust be off, and the circuit must bede-energized.offset test passes.a.b.d. If offset test fails, seeTurn off component to be tested.Install current probe where current is tobe measured.TM 9-4910-571-12&P.c.Press and release TEST button.d.Turn on circuit used to condition currentprobe. If starter is used to condition probe,energize starter long enough to obtain a read-ing. Do not allow engine to start.e.Push and hold TEST button until CALappears. Release TEST button.If VTM reads between -225 and +225,offset test passes.If offset test fails, seeTM 9-4910-571-12&P.Note polarity sign of conditioning current. Ifreadout is negative (-), reverse current probe,and repeat steps 1 thru 4.Turn off circuit used to condition currentprobe.6. Perform offset test.3-294 Change 1
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