Fluke                                                       MET/CAL Procedure
=============================================================================
INSTRUMENT:            Astro-Med ASC-902: CAL ADJ /5520,34401
DATE:                  26-Aug-97
AUTHOR:                Fluke Corporation
REVISION:              $Revision: 1.1 $
ADJUSTMENT THRESHOLD:  70%
NUMBER OF TESTS:       1
NUMBER OF LINES:       111
CONFIGURATION:         HP 34401A
CONFIGURATION:         Fluke 5520A
=============================================================================
#
# Source:
#   Astro-Med Verification / Procedure for ASC-902
#
# Compatibility:
#   5500/CAL 5.0 or MET/CAL 5.0 or later.
#
# Subprocedures:
#   None
#
# Required Files:
#   None
#
# 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  DISP         Procedure not formally tested with UUT.
  1.001  DISP         See procedure README file.
  1.002  ASK-         N              P                            F        V
  1.003  ASK+           K                              X
  1.004  HEAD         PRELIMINARY INSTRUCTIONS
  1.005  DISP         Turn unit ON.
  1.005  DISP
  1.005  DISP         Warm-up time: 30min - REQUIRED
  1.005  DISP         Temperature: 23 +/-2 degC
  1.005  DISP         Humidity: 55 +/-10%
  1.006  DISP         [32]                WARNING
  1.006  DISP         HIGH VOLTAGE is used or exposed during the performance
  1.006  DISP         of this calibration.  DEATH ON CONTACT may result if
  1.006  DISP         personnel fail to observe safety precautions.
  1.007  DISP         Extension Card:  Astro-Med part number 30776-001
  1.008  HEAD         SET-UP PROCEDURE
  1.009  DISP         Turn UUT OFF!
  1.009  DISP
  1.010  DISP         Remove the right side cover of the ASC-902.
  1.010  DISP
  1.010  DISP         Connect the extension card to the signal conditioner PCB
  1.010  DISP         and reinsert into the card cage.
  1.011  DISP         Set the ASC-902 switches to the following positions:
  1.011  DISP
  1.011  DISP         Filter: OFF
  1.011  DISP         Zero Suppression: OFF
  1.011  DISP         Mode: P-P
  1.011  DISP         Coupling: DC
  1.011  DISP         Polarity: NON-INV
  1.012  DISP         Place the Negative meter lead to common input
  1.012  DISP         (black binding post on back of card cage).
  1.012  DISP
  1.012  DISP         Turn UUT ON.
  1.013  DISP         Short the inputs together by placing a jumper between
  1.013  DISP         the positive, negative, and common (red, grey, black)
  1.013  DISP         binding posts on the back of the card cage.
  1.014  HEAD         INPUT NULL
  1.015  DISP         Connect the 34401A to the UUT as follows:
  1.015  DISP         [32] 34401A Input HI to UUT TP6
  1.015  DISP         [32] 34401A Input LO to signal ground
  1.016  DISP         Set the Attenuator/Range to 1mV/div.
  1.017  MESS         Adjust R14 for a 34401A reading of 0 +/-1mV.
  1.018  34401        0mV                                               S  2W
  1.019  HEAD         RANGE NULL
  1.020  DISP         Set the Attenutor/Range TO 1V/div.
  1.021  MESS         Adjust R46 for a 34401A reading of 0 +/-1mV.
  1.022  34401        0mV                                               S  2W
  1.023  HEAD         FINAL NULL
  1.024  DISP         Connect the 34401A to the UUT as follows:
  1.024  DISP         [32] 34401A Input HI to pin 2 of edge connector or the
  1.024  DISP         [32] BNC connector of the back card cage (signal out).
  1.024  DISP         [32] 34401A Input LO to signal ground
  1.025  MESS         Adjust R11 for a 34401A reading of 0 +/-5mV.
  1.026  34401        0mV                                               S  2W
  1.027  HEAD         RMS NULL
  1.028  DISP         Set the Attenuator/Range to OFF.
  1.028  DISP         Set the Mode to RMS.
  1.029  MESS         Adjust R26 for a 34401A reading of 0 +/-5mV.
  1.030  34401        0mV                                               S  2W
  1.031  HEAD         P-P GAIN
  1.032  DISP         Connect the 5520A to the UUT binding posts as follows:
  1.032  DISP         [32] 5520A NORMAL HI to UUT positive (red)
  1.032  DISP         [32] 5520A NORMAL LO to UUT negative (grey)
  1.032  DISP
  1.032  DISP         Leave the 34401A connected to the UUT.
  1.033  DISP         Set Mode to P-P
  1.033  DISP         Set Attenuator/Range to 10mV/div.
  1.034  5520         0.500V                                            S  2W
  1.035  MESS         Adjust R9 for a 34401A reading of 0.500 +/-0.005V.
  1.036  34401        500mV                                             S  2W
  1.037  5520         *                                                 S
  1.038  HEAD         RMS GAIN
  1.039  DISP         Set Mode to RMS
  1.039  DISP         Set Attenuator/Range to 10mV/div.
  1.040  5520         1.000V                                            S  2W
  1.041  MESS         Adjust R24 of a 34401A reading of 1.000 +/-0.005V.
  1.042  34401        1.000V                                            S  2W
  1.043  END