USER GROUP PROCEDURES ( 7411B ) 7411B PROCEDURE ============================================================================== INSTRUMENT: HP 428A CLIP-ON MILLIAMMETER DATE: 22-Apr-87 AUTHOR: User Contributed REVISION: V 4.0 ADJUSTMENT THRESHOLD: 90% NUMBER OF TESTS: 21 NUMBER OF LINES: 157 CONFIGURATION: Fluke 5100B ============================================================================== STEP FSC RANGE NOMINAL TOLERANCE MOD1 MOD2 3 4 CON 1.001 ASK- R F W 1.002 HEAD HP 428A CLIP-ON MILLIAMMETER CALIBRATION PROCEDURE 1.003 DISP HP 428A CLIP-ON MILLIAMMETER 1.003 DISP PROCEDURE # TG-30HR-0673 1.004 HEAD PRELIMINARY 1.005 DISP 1 Set UUT POWER switch to the off position. 1.006 DISP 2 Set UUT Range/Function to 3mA DC. 1.007 DISP 3 Connect UUT to 115 volt power line. 1.008 DISP 4 Set UUT POWER switch to the ON position. 1.009 DISP 5 UUT warm-up time is 15 minutes. 1.010 HEAD {MECHANICAL ZERO SET ADJUSTMENT TEST} 1.011 DISP 1 Set UUT POWER switch to the off position and allow 1.011 DISP about 1 minute for all capacitors to discharge. 1.012 EVAL Does UUT pointer indicate exactly on zero ? 1.013 DISP 1 Rotate UUT mechanical zero-adjustment screw CW until 1.013 DISP meter pointer is to the left of zero and moving 1.013 DISP upscale toward zero. 1.013 DISP 2 Continue to rotate screw CW; stop when pointer is 1.013 DISP exactly on zero. 1.013 DISP 3 IF POINTER OVER-SHOOTS ZERO, REPEAT ABOVE STEPS. 1.013 DISP 4 When pointer is exactly on zero, rotate screw 1.013 DISP slightly CCW . 1.014 JMP 1.102 2.001 HEAD { } 2.002 HEAD {ELECTRICAL ZERO TESTS} 2.003 DISP 1 Set UUT POWER switch to the ON position and allow 2.003 DISP approximately 2 minutes warm-up. 2.004 DISP 2 Check closure of probe jaws. Incomplete closure of 2.004 DISP the jaws is indicated by excessive zero-shift on 2.004 DISP the 3mA range when probe is rotated in earths' 2.004 DISP magnetic field. Swing should not exceed 0.15mA. 2.004 DISP Clean probe jaws if necessary. 2.005 DISP 3 Degauss probe. Insert probe into degausser on rear of 2.005 DISP UUT with arrow on probe in same position as arrow 2.005 DISP marked on chassis. 2.005 DISP 4 Depress degausser switch (S3) and withdraw probe 2.005 DISP slowly until probe is removed about one foot. 2.005 DISP 5 Release degausser switch (S3). 2.006 HEAD { } 2.007 HEAD {RANGE TO RANGE ZERO TEST} 2.008 DISP 1 Zero UUT with front panel ZERO knob (R41). 2.009 DISP 2 Rotate RANGE switch slowly through all ranges. 2.009 DISP 3 Pointer should indicate zero +/-1/2% on all ranges. 2.010 EVAL Does pointer indicate zero +/- 1/2% on all ranges ? 3.001 HEAD { } 3.002 HEAD {ZERO CONTROL RANGE TEST} 3.003 DISP 1 Set UUT Range/Function to 10mA DC. 3.003 DISP 2 Zero UUT with front panel ZERO knob (R41). 3.004 IEEE [@0]L+2, 3.005 DISP 3 Connect short test lead from LO to HI on TI Panel, 3.005 DISP Multifunction Output Source. 3.006 DISP 4 Clip UUT probe around test lead connected to 3.006 DISP TI Panel, Multifunction Output Source. 3.006 DISP 3.006 DISP 5 NOTE: Arrow on probe should point to negative 3.006 DISP terminal. 3.007 5100 5mA S 2W 3.008 DISP 1 Rotate UUT ZERO knob (R41) in both directions. 3.008 DISP Adjustment range should be at least 2mA in each 3.008 DISP direction. 3.009 EVAL Does ZERO knob adjust at least 2mA in each direction ? 4.001 IEEE [@0]L-2, 4.002 DISP 1 Remove probe from lead on TI Panel. 4.003 HEAD { } 4.004 HEAD {DC CURRENT RANGE AND ADJUSTMENT TESTS} 4.005 HEAD { } 4.006 HEAD {RANGE ADJUSTMENT TEST} 4.007 DISP 1 Set UUT Range/Function to 3mA DC. 4.008 DISP 2 Zero UUT with front panel ZERO knob (R41). 4.009 IEEE [@0]L+2, 4.010 DISP 3 Clip UUT probe around lead connected to TI Panel. 4.010 DISP 4.010 DISP 4 NOTE: Arrow on probe should point to negative 4.010 DISP terminal. 4.011 DISP 5 Set UUT Range/Function to 100mA DC. 4.012 5100 100 100mA 0.1U 3/ 2W 4.013 DISP 1 Remove access plug on right side of UUT. 4.014 5100 100mA S 2W 4.015 DISP 1 Adjust UUT Meter Cal adjust (R48) for pointer 4.015 DISP indication of 100mA. 4.016 DISP 2 Replace access plug on right side of UUT. 4.017 JMP 4.102 5.001 IEEE [@0]L-2, 5.002 DISP 1 Remove probe from lead on TI Panel. 5.003 HEAD { } 5.004 HEAD {RANGES TEST} 5.005 DISP 1 Set UUT Range/Function to 3mA DC. 5.006 DISP 2 Zero UUT with front panel ZERO knob (R41). 5.007 IEEE [@0]L+2, 5.008 DISP 2 Clip UUT probe around lead connected to TI Panel. 5.008 DISP 5.008 DISP 3 NOTE: Arrow on probe should point to negative 5.008 DISP terminal. 5.009 5100 3 3mA 0.1U 3/ 2W 6.001 DISP 1 Set UUT Range/Function to 10mA DC. 6.002 5100 10 10mA 0.1U 3/ 2W 7.001 DISP 1 Set UUT Range/Function to 30mA DC. 7.002 5100 30 30mA 0.1U 3/ 2W 8.001 DISP 1 Set UUT Range/Function to 100mA DC. 8.002 5100 100 100mA 0.1U 3/ 2W 9.001 DISP 1 Set UUT Range/Function to 300mA DC. 9.002 5100 300 300mA 0.1U 3/ 2W 10.001 DISP 1 Set UUT Range/Function to 1000mA DC. 10.002 5100 1000 1000mA 0.1U 3/ 2W 11.001 HEAD { } 11.002 HEAD {RANGE LINEARITY TEST} 11.003 IEEE [@0]L-2, 11.004 DISP 1 Remove UUT probe from lead on TI Panel. 11.005 DISP 2 Set UUT Range/Function to 3mA DC. 11.006 DISP 3 Zero UUT with front panel ZERO knob (R41). 11.007 DISP 4 Set UUT Range/Function to 100mA DC. 11.008 IEEE [@0]L+2, 11.009 DISP 5 Clip UUT probe around test lead connected to 11.009 DISP TI Panel, Multifunction Output Source. 11.009 DISP 11.009 DISP 6 NOTE: Arrow on probe should point to negative 11.009 DISP terminal. 11.010 5100 100 10mA 0.1U 3/ 2W 12.001 5100 100 20mA 0.1U 3/ 2W 13.001 5100 100 30mA 0.1U 3/ 2W 14.001 5100 100 40mA 0.1U 3/ 2W 15.001 5100 100 50mA 0.1U 3/ 2W 16.001 5100 100 60mA 0.1U 3/ 2W 17.001 5100 100 70mA 0.1U 3/ 2W 18.001 5100 100 80mA 0.1U 3/ 2W 19.001 5100 100 90mA 0.1U 3/ 2W 20.001 5100 100 100mA 0.1U 3/ 2W 21.001 IEEE [@0]L-2, 21.002 DISP 1 Remove UUT probe from lead on TI Panel. 21.003 DISP 2 Remove lead from TI Panel, Multifunction Output 21.003 DISP Source. 21.004 HEAD POST CALIBRATION 21.005 DISP 1 Set UUT POWER switch to the off position. 21.006 DISP 2 Disconnect UUT from 115 volt power line. 21.007 DISP 3 Print RBA in first 3 blocks of MWO service comments. 21.008 DISP 4 CALIBRATION IS COMPLETE. 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