Fluke                                                       MET/CAL Procedure
=============================================================================
INSTRUMENT:            Simpson 260-3: CAL ADJ /5520
DATE:                  09-Sep-97
AUTHOR:                Fluke Corporation
REVISION:              $Revision: 1.1 $
ADJUSTMENT THRESHOLD:  70%
NUMBER OF TESTS:       1
NUMBER OF LINES:       97
CONFIGURATION:         Fluke 5520A
=============================================================================
#
# Compatibility:
#   5500/CAL 5.0 or MET/CAL 5.0 or later.
#
# Subprocedures:
#   None
#
# Required Files:
#   sim260a1.bmp
#   sim260a2.bmp
#   sim260a3.bmp
#   sim260a4.bmp
#
# System Specifications:
#   TUR calculation is based on specification interval of the accuracy file.
#   The default 5520A accuracy file contains 90 day specs.
#
# Fluke makes no warranty, expressed or implied, as to the fitness
# or suitability of this procedure in the customer's application.
#
 STEP    FSC    RANGE NOMINAL        TOLERANCE     MOD1        MOD2  3  4 CON
  1.001  ASK-                                                              V
  1.002  HEAD         PRELIMINARY INSTRUCTIONS
  1.003  DISP         Warm-up time: None
  1.003  DISP         Temperature: 20 - 40degC
  1.003  DISP         Humidity: <80%
  1.004  DISP         [32]                WARNING
  1.004  DISP         HIGH VOLTAGE is used or exposed during the performance
  1.004  DISP         of this calibration.  DEATH ON CONTACT may result if
  1.004  DISP         personnel fail to observe safety precautions.
  1.005  DISP         [32]               NOTICE
  1.005  DISP         Check the meter sensitivity before replacing components
  1.005  DISP         or performing calibration.  A change in meter sensi-
  1.005  DISP         tivity is evident when all ranges are off calibration.
  1.006  HEAD         DISASSEMBLY INSTRUCTIONS
  1.007  DISP         Turn the FUNCTION SWITCH to +DC, and remove all
  1.007  DISP         connections and test leads.
  1.007  DISP
  1.007  DISP         Remove the four screws securing the rear cover to the
  1.007  DISP         the front panel.
  1.007  DISP
  1.007  DISP         Remove the rear cover.
  1.008  HEAD         DC CURRENT
  1.009  DISP         Adjust the front panel mechanical METER ZERO with the
  1.009  DISP         UUT in a horizontal position.
  1.009  DISP
  1.009  DISP         Check that the adjuster pin does NOT rest against the
  1.009  DISP         adjustment fork when finished.
  1.010  DISP         Set the Function Switch to +DC.
  1.010  DISP         Set the Range Switch to 50uA.
  1.011  DISP         Connect the 5520A to the UUT as follows:
  1.011  DISP         [32] 5520A AUX HI to UUT 50uA
  1.011  DISP         [32] 5520A AUX LO to UUT COMMON
  1.012  5520         50.0uA                                            S  2W
  1.013  PIC          SIM260a1
  1.014  5520         *                                                 S
  1.015  HEAD         DC VOLTAGE
  1.016  DISP         [32]           * NOTE *
  1.016  DISP         It may be necessary to make a compromise adjustment
  1.016  DISP         of R27 to meet tolerances of both voltage and current
  1.016  DISP         ranges.  Accuracy of the DC Voltage depends on the
  1.016  DISP         accuracy of the previous adjustment.
  1.017  DISP         Connect the 5520A to the UUT as follows:
  1.017  DISP         [32] 5520A NORMAL HI to UUT 50uA
  1.017  DISP         [32] 5520A NORMAL LO to UUT COMMON
  1.018  5520         0.250V                                            S  2W
  1.019  PIC          SIM260a2
  1.020  5520         *                                                 S
  1.021  DISP         [32]              *NOTE*
  1.021  DISP         A compromise will have to be reached between the 50uA
  1.021  DISP         & 250mV adjustments.  Adjust for best overall accuracy.
  1.022  OPBR         Do you wish to re-do the 50uA adjustment?
  1.023  JMPT         1.010
  1.024  HEAD         AC VOLTAGE
  1.025  DISP         Connect the 5520A to the UUT as follows:
  1.025  DISP         [32] 5520A NORMAL HI to UUT POS
  1.025  DISP         [32] 5520A NORMAL LO to UUT COMMON
  1.026  DISP         Set the Function Switch to AC.
  1.026  DISP         Set the Range Switch to 250V.
  1.027  5520         250V                         60H            SI    S  2W
  1.028  PIC          SIM260a3
  1.029  5520         *                                                 S
  1.030  DISP         Set the Range Switch to 2.5V.
  1.031  5520         2.50V                        60H            SI    S  2W
  1.032  PIC          SIM260a4
  1.033  END