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Navair 17-20AQ-347 Technical Manual

Wavetek 1271 with or without opt12 or 20
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DIGITAL MULTIMETER
THIS PUBLICATION SUPERSEDES NAVAIR 17-20AQ-347
DISTRIBUTION STATEMENT C. DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT AGENCIES AND THEIR
CONTRACTORS TO PROTECT PUBLICATIONS REQUIRED FOR OFFICIAL USE OR FOR ADMINISTRATIVE OR
OPERATIONAL PURPOSES ONLY.
MEASUREMENT SCIENCE DEPARTMENT, CORONA DIVISION, NAVAL SURFACE WARFARE CENTER,
P.O. BOX 5000, CORONA, CA 92878-5000.
DESTRUCTION NOTICE - FOR UNCLASSIFIED, LIMITED DOCUMENTS, DESTROY BY ANY METHOD
THAT WILL PREVENT DISCLOSURE OF CONTENTS OR "RECONSTRUCTION OF THE DOCUMENT."
PUBLISHED BY DIRECTION OF COMMANDER NAVAL AIR SYSTEMS COMMAND
TECHNICAL MANUAL
INSTRUMENT CALIBRATION PROCEDURE
WAVETEK
1271
WITH OR WITHOUT
OPT12 OR 20
DATED 1 SEPTEMBER 1997
OTHER REQUESTS FOR THIS DOCUMENT SHALL BE REFERRED TO
NAVAIR 17-20AQ-347
1 AUGUST 2007

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Summary of Contents for Navair 17-20AQ-347

  • Page 1 WAVETEK 1271 WITH OR WITHOUT OPT12 OR 20 THIS PUBLICATION SUPERSEDES NAVAIR 17-20AQ-347 DATED 1 SEPTEMBER 1997 DISTRIBUTION STATEMENT C. DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT AGENCIES AND THEIR CONTRACTORS TO PROTECT PUBLICATIONS REQUIRED FOR OFFICIAL USE OR FOR ADMINISTRATIVE OR OPERATIONAL PURPOSES ONLY.
  • Page 2 NAVAIR 17-20AQ-347 LIST OF EFFECTIVE PAGES The purpose of this list is to identify the pages in this document affected by any technical content changes made since the previous release of the document. NOTE: On a revised page, with the exception of the Title, the A, and the i pages, the technical changes are indicated by a vertical line in the outer margin of the page.

  • Page 3: Table Of Contents

    NAVAIR 17-20AQ-347 TABLE OF CONTENTS Section Page Introduction and Description ........................Equipment Requirements......................... Preliminary Operations ..........................Calibration Process ..........................Direct Voltage Tests..........................AC RMS Voltage Tests........................10 Resistance Tests (Option 20 Only)....................... 15 Calibration Factors ..........................16 Securing The TI............................ 17 Navy Calibration Checklist........................

  • Page 4: Introduction And Description

    NAVAIR 17-20AQ-347 SECTION 1 INTRODUCTION AND DESCRIPTION 1.1 This procedure describes the calibration of the Wavetek 1271 Digital Multimeter with or without OPT12 or 20. The instrument being calibrated is referred to herein as the TI (Test Instrument). 1.2 All comments concerning this procedure should be directed to the Measurement Science Department, Corona Division, Naval Surface Warfare Center, P.O.
  • Page 5 NAVAIR 17-20AQ-347 Performance Test Characteristics Specifications Method AC RMS Voltage 100 V range: 10 to 40 Hz: ±0.152% iv (continued) 40 to 20 kHz: ±0.025% iv 20 to 50 kHz: ±0.0825% iv 50 to 100 kHz: ±0.308% iv 1000 V range: 10 to 40 Hz: ⎡...

  • Page 6: Equipment Requirements

    NAVAIR 17-20AQ-347 SECTION 2 EQUIPMENT REQUIREMENTS NOTES Minimum use specifications are the principal parameters required for performance of the calibration, and are included to assist in the selection of alternate equipment, which may be used at the discretion of the using laboratory.

  • Page 7: Preliminary Operations

    NAVAIR 17-20AQ-347 Item Minimum Use Calibration Specifications Equipment 2.7 Resistor, standard Electro-Scientific Industries Resistance: 100 kΩ SR1-100K Uncertainty: NA (actual value is measured) 2.8 Resistor, standard Electro-Scientific Industries Resistance: 1 MΩ SR1-1M Uncertainty: NA (actual value is measured) 2.9 Resistor, standard Electro-Scientific Industries Resistance: 100 MΩ...

  • Page 8: Dc Volts Reference Setup (20 V Or Less)

    NAVAIR 17-20AQ-347 3.3 Connect the applicable equipment as shown in Figure 1, the reference setup for low voltage tests. Turn the power switches on and allow the setup to warm-up for 1 hour. (During warm-up time, proceed with steps 3.4 through 3.10.) 3.4 Turn the TI power switch to ON.
  • Page 9 Electrically zero adjust the null detectors up to their 3 μV ranges; then set null range selectors, as necessary, to avoid damage. 3.10 Measure items 2.4 (100 Ω) through 2.8 (1 MΩ) as described in NAVAIR 17-20AR-29 to establish the nominal values of the standard resistors. Record the measured values as the reference values in step 4.3.6.

  • Page 10: Calibration Process

    NAVAIR 17-20AQ-347 SECTION 4 CALIBRATION PROCESS NOTE Unless otherwise specified, verify the results of each test and take corrective action whenever the test requirement is not met, before proceeding. 4.1 DIRECT VOLTAGE TESTS 4.1.1 Zero Tests 4.1.1.1 Connect a low thermal short to the TI HI and LO terminals. Depress the TI ZERO pushbutton. Wait until the TI BUSY light is extinguished.

  • Page 11: Dc Voltage Tests (20 V Or Less)

    NAVAIR 17-20AQ-347 2.1.1 DV SOURCE GUARD OUTPUT 2.1.2 VOLTAGE DIVIDER INPUT GUARD Ω GUARD Figure 2. DC Voltage Tests (20 V or less) 4.1.4 Depress the TI RANGE controls to select the following TI RANGE. Set the applicable equipment controls for the settings indicated, and verify that the TI indications are within the tolerance limits listed in the following table.

  • Page 12: Dc Voltage Setup (100 V Or More)

    NAVAIR 17-20AQ-347 Nominal Tolerance Limits TI RANGE Divider Setting 0.4000000 8.00000 7.99976 8.00024 0.5000000 10.00000 9.99972 10.00028 0.7000000 14.00000 13.99964 14.00036 0.9500000 19.00000 18.99955 19.00045 Reverse output polarity of DV source. 0.9500000 -19.00000 -18.99955 to -19.00045 4.1.5 Set the controls of the DV source for minimum output. Disconnect the test setup.

  • Page 13: Ac Rms Voltage Tests

    NAVAIR 17-20AQ-347 4.1.11 Perform the measurements tabulated below as follows: 4.1.11.1 Set the null detector OPR-ZERO switch to ZERO and set the equipment controls, as required, to obtain the settings listed in the following table for the TI RANGE, the reference divider Input-Output switches, and the DV source. Depress the TI RANGE pushbutton to select the TI 100 V or 1000 V RANGE, as required.
  • Page 14 NAVAIR 17-20AQ-347 RANGE FILTER 10 Hz REM Ω (light on) REMOTE GUARD MEASUREMENT RESOLUTION 5 digit NOTES To select ACV filter: Depress TI CONFIG pushbutton Select Filt function Select 10 Hz filter Depress TI ACV pushbutton To select REMOTE GUARD: Depress the TI INPUT pushbutton Select REM Ω...
  • Page 15 NAVAIR 17-20AQ-347 AV Source DV Source Tolerance Limits Output Frequency % Error Indication 1-CF 10 Hz* 10 Hz 0.99848 to 1.00152 1-CF 50 Hz* 50 Hz 0.99975 to 1.00025 1-CF 1 kHz 1 kHz 0.99975 to 1.00025 1-CF 20 kHz 20 kHz 0.99975 to 1.00025...
  • Page 16 NAVAIR 17-20AQ-347 DV and AV Source TTS and TI Characterized Output RANGE V ac Equivalent Tolerance Limits (Freq) 10.0000 100 kHz 9.9692 to 10.0308 10.0000 1 MHz 9.5510 to 10.4490 100.000 10 Hz* 99.848 to 100.152 100.000 50 Hz* 99.975 to 100.025...

  • Page 17: Measurement For 100 Mv Range

    NAVAIR 17-20AQ-347 AV SOURCE GUARD Ω GUARD SOURCE SENSE CHASSIS GUARD Figure 5. Measurement for 100 mV Range 4.2.11 Select the AV source 1 V range and perform the following measurement. 4.2.11.1 Depress the TI controls to select the 100 mV RANGE. Set the AV source controls to the indicated voltage value, to the indicated frequency, and to the ±% error setting applicable to the frequency of measurement as obtained in step 4.2.3.8.

  • Page 18: Resistance Tests (Option 20 Only)

    NAVAIR 17-20AQ-347 4.3 RESISTANCE TESTS (OPTION 20 ONLY) 4.3.1 Connect the 10 Ω standard resistor (item 2.3) to the TI as shown in Figure 7. 2.3 THROUGH 2.9 STANDARD RESISTOR Figure 6. Ohm Test 4.3.2 To measure the 10 Ω standard resistor, perform these steps:...

  • Page 19: Calibration Factors

    The nominal values applicable for the 100 Ω through 1 MΩ measurements in the following table are the reference values that were measured in step 3.10 as described in NAVAIR 17-20AR-29. To select the 100 MΩ range, perform these steps:...

  • Page 20: Securing The Ti

    NAVAIR 17-20AQ-347 4.4.8 Repeat the sections of the TI calibration that had previously failed. If these sections are completed satisfactorily, then proceed to Section 4.5. Otherwise, consult the manufacturer’s manual to troubleshoot the problems encountered. 4.5 SECURING THE TI 4.5.1 Any steps that produced an out-of-tolerance reading must be repeated at this point. Use the TI SECOND RUN checklist column to repeat the necessary steps and verify that these steps are now within the given tolerance limits.
  • Page 21 NAVAIR 17-20AQ-347 CALIBRATION CHECKLIST TEST INST (S) Wavetek 1271 Digital Multimeter with or without OPT12 or 20 PROC. NO. NA 17-20AQ-347 MODEL SER. NO. PROCEDURE MEASURED VALUES STEP FUNCTION TESTED NOMINAL FIRST RUN SECOND RUN CALIBRATION TOLERANCES Direct Voltage Tests 4.1.1...

  • Page 22: Navy Calibration Checklist

    NAVAIR 17-20AQ-347 CALIBRATION CHECKLIST TEST INST (S) Wavetek 1271 Digital Multimeter with or without OPT12 or 20 PROC. NO. NA 17-20AQ-347 MODEL SER. NO. PROCEDURE MEASURED VALUES STEP FUNCTION TESTED NOMINAL FIRST RUN SECOND RUN CALIBRATION TOLERANCES AC RMS Voltage Tests...
  • Page 23 NAVAIR 17-20AQ-347 CALIBRATION CHECKLIST TEST INST (S) Wavetek 1271 Digital Multimeter with or without OPT12 or 20 PROC. NO. NA 17-20AQ-347 MODEL SER. NO. PROCEDURE MEASURED VALUES STEP FUNCTION TESTED NOMINAL FIRST RUN SECOND RUN CALIBRATION TOLERANCES 4.2.11.2 100 mV 100.000...

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