Fluke MET/CAL Procedure ============================================================================= INSTRUMENT: Keithley 175A: CAL ADJ /5520 DATE: 03-Sep-97 AUTHOR: Fluke Corporation REVISION: $Revision: 1.1 $ ADJUSTMENT THRESHOLD: 70% NUMBER OF TESTS: 1 NUMBER OF LINES: 267 CONFIGURATION: Fluke 5520A ============================================================================= # # 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 ASK- P F V 1.002 ASK+ X 1.003 HEAD PRELIMINARY INSTRUCTIONS 1.004 DISP Warm-up time: 1 hour - REQUIRED 1.004 DISP Temperature: 20 - 26 degC 1.004 DISP Humidity: <70% 1.005 DISP [32] WARNING 1.005 DISP HIGH VOLTAGE is used or exposed during the performance 1.005 DISP of this calibration. DEATH ON CONTACT may result if 1.005 DISP personnel fail to observe safety precautions. 1.006 DISP This entire calibration procedure may be performed with- 1.006 DISP out having to make any internal adjustments if frequency 1.006 DISP compensation has been verified. It is suggested that 1.006 DISP the 2-200 VAC ranges be checked @10kH before proceeding. 1.007 HEAD CALIBRATION SWITCH 1.008 DISP The MODEL 175A CALIBRATION switch (rear panel) must be 1.008 DISP moved to the ENABLED position to allow calibration 1.008 DISP constant storage. 1.009 DISP SET THE CALIBRATION SWITCH to ENABLED! 1.009 DISP 1.009 DISP * NOTE * The CAL ENABLED switch will cause a "C" to be 1.009 DISP displayed on the LCD display. 1.010 HEAD DC VOLTAGE 1.011 DISP Connect the 5520A to the UUT as follows: 1.011 DISP [32] 5520A NORMAL HI to UUT V-OHM 1.011 DISP [32] 5520A NORMAL LO to UUT COM 1.012 RNG 200mV 1.013 5520 0.00mV S 2W 1.014 DISP Press the REL pushbutton to zero the DCV reading. 1.015 5520 190.00mV S 2W 1.016 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.016 DISP The RCL pushbutton DECREMENTS the 175A display. 1.016 DISP 1.016 DISP Adjust the 175A reading for EXACTLY 190.00mV. 1.017 5520 * S 1.018 RNG 2V 1.019 5520 1.9000V S 2W 1.020 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.020 DISP The RCL pushbutton DECREMENTS the 175A display. 1.020 DISP 1.020 DISP Adjust the 175A reading for EXACTLY 1.9000V. 1.021 5520 * S 1.022 RNG 20V 1.023 5520 19.000V S 2W 1.024 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.024 DISP The RCL pushbutton DECREMENTS the 175A display. 1.024 DISP 1.024 DISP Adjust the 175A reading for EXACTLY 19.000V. 1.025 5520 * S 1.026 RNG 200V 1.027 5520 190.00V S 2W 1.028 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.028 DISP The RCL pushbutton DECREMENTS the 175A display. 1.028 DISP 1.028 DISP Adjust the 175A reading for EXACTLY 190.00V. 1.029 5520 * S 1.030 RNG 1000V 1.031 5520 1000.0V S 2W 1.032 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.032 DISP The RCL pushbutton DECREMENTS the 175A display. 1.032 DISP 1.032 DISP Adjust the 175A reading for EXACTLY 1000.0V. 1.033 5520 * S 1.034 HEAD AC VOLTAGE 1.035 RNG 200mV AC 1.036 5520 190.00mV 200H SI S 2W 1.037 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.037 DISP The RCL pushbutton DECREMENTS the 175A display. 1.037 DISP 1.037 DISP Adjust the 175A reading for EXACTLY 190.00mV. 1.038 DISP Press the dB button and verify the dB indictor is ON. 1.039 5520 19.00mV 200H SI S 2W 1.040 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.040 DISP The RCL pushbutton DECREMENTS the 175A display. 1.040 DISP 1.040 DISP Adjust the 175A reading for EXACTLY 19.00mV. 1.041 5520 * S 1.042 DISP Press the REL button and verify the dB indicator is OFF. 1.043 RNG 2V AC 1.044 5520 1.9000V 200H SI S 2W 1.045 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.045 DISP The RCL pushbutton DECREMENTS the 175A display. 1.045 DISP 1.045 DISP Adjust the 175A reading for EXACTLY 1.9000V. 1.046 5520 * S 1.047 RNG 20V AC 1.048 5520 19.000V 200H SI S 2W 1.049 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.049 DISP The RCL pushbutton DECREMENTS the 175A display. 1.049 DISP 1.049 DISP Adjust the 175A reading for EXACTLY 19.000V. 1.050 5520 * S 1.051 RNG 200V AC 1.052 5520 190.00V 200H SI S 2W 1.053 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.053 DISP The RCL pushbutton DECREMENTS the 175A display. 1.053 DISP 1.053 DISP Adjust the 175A reading for EXACTLY 190.00V. 1.054 5520 * S 1.055 RNG 1000V AC 1.056 5520 750.0V 200H SI S 2W 1.057 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.057 DISP The RCL pushbutton DECREMENTS the 175A display. 1.057 DISP 1.057 DISP Adjust the 175A reading for EXACTLY 750.0V. 1.058 5520 * S 1.059 HEAD RESISTANCE 1.060 DISP Connect the 5520A to the UUT as follows: 1.060 DISP [32] 5520A AUX HI to UUT V-OHM 1.060 DISP [32] 5520A AUX LO to UUT COM 1.060 DISP [32] 5520A NORMAL HI to UUT V-OHM 1.060 DISP [32] 5520A NORMAL LO to UUT COM 1.060 DISP Connect the SENSE leads DIRECTLY to the UUT. Connect 1.060 DISP the NORMAL leads to the SENSE leads AT the UUT. 1.061 DISP Set AC/DC to DC. 1.062 RNG 200Z 1.063 5520 0.00Z S CW 1.064 DISP Press the REL button and note the display zeroes. 1.065 5520 100.00Z S CW 1.066 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.066 DISP The RCL pushbutton DECREMENTS the 175A display. 1.066 DISP 1.066 DISP Adjust the 175A reading for EXACTLY 100.00 Ohms. 1.067 5520 * S 1.068 DISP Press the REL button and note REL indicator is OFF. 1.069 RNG 2kZ 1.070 5520 0.00Z S CW 1.071 DISP Press the REL button and note the display zeroes. 1.072 5520 1.0000kZ S CW 1.073 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.073 DISP The RCL pushbutton DECREMENTS the 175A display. 1.073 DISP 1.073 DISP Adjust the 175A reading for EXACTLY 1.0000 kOhms. 1.074 5520 * S 1.075 DISP Press the REL button and note REL indicator is OFF. 1.076 RNG 20kZ 1.077 5520 10.000kZ S CW 1.078 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.078 DISP The RCL pushbutton DECREMENTS the 175A display. 1.078 DISP 1.078 DISP Adjust the 175A reading for EXACTLY 10.000 kOhms. 1.079 5520 * S 1.080 RNG 200kZ 1.081 5520 100.00kZ S 2W 1.082 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.082 DISP The RCL pushbutton DECREMENTS the 175A display. 1.082 DISP 1.082 DISP Adjust the 175A reading for EXACTLY 100.00 kOhms. 1.083 5520 * S 1.084 DISP Set the uut RANGE to Mohm. 1.085 5520 1.0000MZ S 2W 1.086 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.086 DISP The RCL pushbutton DECREMENTS the 175A display. 1.086 DISP 1.086 DISP Adjust the 175A reading for EXACTLY 1.0000 MOhms. 1.087 5520 * S 1.088 5520 10.000MZ S 2W 1.089 DISP The STO/CLR pushbutton INCREMENTS the 175A display. 1.089 DISP The RCL pushbutton DECREMENTS the 175A display. 1.089 DISP 1.089 DISP Adjust the 175A reading for EXACTLY 10.000 MOhms. 1.090 5520 * S 1.091 HEAD CALIBRATION STORAGE 1.092 OPBR To store the calibration constants, simultaneously press 1.092 OPBR the REL and dB buttons until the message "Stor" is 1.092 OPBR displayed. 1.092 OPBR 1.092 OPBR Is the message "Stor" displayed on the LCD readout? 1.093 JMPT 1.096 1.094 DISP If instead the message "out" is displayed, then 1.094 DISP calibration storage WAS NOT ENABLED and the calibration 1.094 DISP constants will be valid until the unit is turned OFF. 1.095 DISP If "out" was displayed, and you would like to SAVE the 1.095 DISP calibration constants, slide the rear panel CALIBRATION 1.095 DISP switch to ENABLED. 1.095 DISP 1.095 DISP Simultaneously press the REL and dB buttons 1.095 DISP until "Stor" is displayed. 1.096 DISP SLIDE THE CALIBRATION SWITCH TO DISABLED! 1.097 OPBR The BASIC CALIBRATION is complete, however if the 1.097 OPBR AC FREQUENCY RESPONSE was in need of adjustment, 1.097 OPBR access to the three internal trimmer capacitors 1.097 OPBR will be required. 1.097 OPBR 1.097 OPBR DO YOU WISH TO ADJUST THE AC FREQUENCY RESPONSE? 1.098 JMPF 1.125 1.099 HEAD FREQUENCY COMPENSATION 1.100 HEAD DISASSEMBLY INSTRUCTIONS 1.101 DISP [32] WARNING 1.101 DISP Disconnect the line cord and any test leads from the 1.101 DISP UUT. 1.102 DISP Turn the UUT over and remove the four screws from the 1.102 DISP bottom of the case. 1.102 DISP 1.102 DISP Turn the UUT over again and separate the top cover from 1.102 DISP the rest of the unit. 1.102 DISP 1.102 DISP *NOTE* When reinstalling the top cover, make sure to 1.102 DISP properly position the handle in the bottom cover. 1.103 DISP Once the top cover is removed, the shield and PC board 1.103 DISP must be secured to the bottom to prevent movement. 1.103 DISP 1.103 DISP This can be accomplished with two screws and nuts 1.103 DISP in place of the top cover. 1.104 PIC 175AV 1.105 DISP Connect the unit to AC power, and turn the unit ON. 1.106 RNG 200V AC 1.107 PIC 175AV 1.108 5520 100.00V 10kH SI S 2W 1.109 DISP Adjust C101 for a reading of 100.00 +/-3 counts. 1.110 5520 * S 1.111 RNG 2V AC 1.112 5520 1.0000V 10kH SI S 2W 1.113 DISP Adjust C104 for a reading of 1.0000 +/-8 counts. 1.114 5520 * S 1.115 OPBR The previous adjustments (C101 & C104) interact. 1.115 OPBR 1.115 OPBR Would you like to repeat the adjustments to make sure 1.115 OPBR they are BOTH correct? 1.116 JMPT 1.106 1.117 RNG 20V AC 1.118 5520 10.000V 10kH SI S 2W 1.119 DISP Adjust C107 for a reading of 10.000 +/-8 counts. 1.120 5520 * S 1.121 HEAD REASSEMBLY INSTRUCTIONS 1.122 DISP [32] WARNING 1.122 DISP Disconnect the line cord and any test leads from the 1.122 DISP UUT. 1.123 DISP Remove the screws and nuts used to hold the shield and 1.123 DISP PC board in place (if necessary). 1.123 DISP 1.123 DISP Properly position the handle into the bottom cover. 1.124 DISP Carefully replace the top cover on the unit. 1.124 DISP 1.124 DISP Turn the UUT over and replace the four screws that 1.124 DISP attach the top cover to the rest of the unit. 1.125 END