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INSPECT FOR GENERAL APPEARANCE, RUST, NICKS, AND SMOOTH FUNCTION OF MOVING PARTS. USE SCOTCHBRITE VERY FINE PAD TO REMOVE SPINDLE RUST. USE
TOOLING STONE TO REMOVE SPINDLE NICKS.
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WHEN OILING TRACK, USE HIGH GRADE INSTRUMENT OIL. WIPE JAWS CLEAN
BEFORE EACH MEASUREMENT.
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BRING O.D. JAWS TOGETHER, INDICATOR POINTER SHOULD REGISTER ZERO ON DIAL. PLACE PIN GAGE BETWEEN JAWS AT ABOUT (1/8 FROM TIPS
OF JAWS AND AT BASE OF JAWS). THE
DIFFERENCE BETWEEN READINGS INDICATES
THE AMOUNT OF TIP WEAR.
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MODELS WITH KNIFE EDGE O.D. JAWS ARE CHECKED SAME AS STEP 3.
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MEASURE A RING GAGE WITH THE I.D. JAWS AND OBSERVE VALUE.
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CHECK DEPTH ROD USING GAGE BLOCKS. COMPARE READING WITH GAGE
BLOCK SIZE. IF THE CALIPERS HAVE
ADDITIONAL DEPTH MEASUREMENT
SURFACE VERIFY IN SAME MANNER AND RECORD ACTUALS.
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IF
PREVIOUS CHECKS ARE ACCEPTABLE, USING O.D. JAWS, MEASURE GAGE BLOCK COMBINATIONS AT POSITIONS ALONG THE
BEAM AND OBSERVE THE VARIATIONS, A TOTAL OF THREE READINGS (ZERO AND TWO OTHERS) ARE REQUIRED FOR CALIPERS UP TO
12" AND ONE ADDITIONAL READINGS PER FOOT OVER 12".
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WEAR ON GAGING SURFACE OF JAWS, MAX .0005" FOR FIRST 1/8" FROM END OF JAWS.
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ACCURACY OF 1 DIVISION OVER THE ENTIRE RANGE.
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CHECK MEASURING SURFACES FOR WEAR WITH
OPTICAL FLATS.
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CALIPERS REQUIRING ADJUSTMENT OF MORE THAT 1
GRADUATION WILL BE CHECKED FOR AN
"OUT OF TOLERANCE" CONDITION. ANY ADJUSTMENT OF MORE THAN
ONE GRADUATION REQUIRES CALIBRATION RECALL
CYCLE REDUCTION. ADJUST MICROMETERS PER
THE MANUFACTURERS INSTRUCTIONS.
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RECORD THE SERIAL NUMBER OF THE EQUIPMENT,
AND THE CALIBRATION DATA (HIGH,
MIDDLE, AND LOW READINGS).
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ATTACH A COMPLETED CALIBRATION STICKER TO
EACH CALIPER AND VERIFY THAT IT IS
SERIALIZED.
