Fluke 515A Manuale utente

NAVAIR 17–20AQ–70

TECHNICAL MANUAL

INSTRUMENT CALIBRATION PROCEDURE



PORTABLE CALIBRATOR

FLUKE 515A

THIS PUBLICATION SUPERSEDES NAVAIR 17–20AQ–70

DATED OCTOBER 1974 – CHANGED 1 MAY 1978

DISTRIBUTION STATEMENT C. DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT AGENCIES AND

THEIR CONTRACTORS TO PROTECT PUBLICATIONS REQUIRED FOR OFFICIAL USE OR FOR ADMINIS-

TRATIVE OR OPERATIONAL PURPOSES ONLY. OTHER REQUESTS FOR THIS DOCUMENT SHALL BE RE-

FERRED TO NAVY MEASUREMENT SCIENCE DIRECTORATE, NAVAL WARFARE ASSESSMENT DIVISION,

P.O. BOX 5000 CORONA, CA 91718–5000



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

1 FEBRUARY 1995

LIST OF EFFECTIVE PAGES

Insert latest changed pages; dispose of superseded pages in accordance with applicable regulations.

NOTE: On a changed page, the portion of the test affected by the latest change is indicated by a vertical line, or other

change symbol, in the outer margin of the page.

Page

No. Change

No. * Change

Date Page

No. Change

No. * Change

Date

Title 0

1 to 16 0

* Zero in this column indicates an original page.

NAVAIR 17–20AQ–70

TABLE OF CONTENTS

Section Page

1 Introduction and Description 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Equipment Requirements 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Preliminary Operations 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Calibration Process 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Line Regulation Test 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 DC Voltage Range Test 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3 DC Microvolts Output and Linearity Test 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4 10 Volt DC Decade Test 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.5 AC Frequency Response Test Up To 50 kHz 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.6 AC Voltage Test 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.7 Frequency Test 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.8 Resistance Test 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Navy Calibration Checklist 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ILLUSTRATIONS

Figure Page

1 Line Regulation Test Configuration 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 DC Output Voltage Range Test Configuration 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 DC Microvolts Output and Linearity Test Configuration 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 DC Volts Decade Test Configuration 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Frequency Response Test Configuration 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 AC Voltage Test Configuration 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Resistance Test Configuration 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLES

Table Page

1 Calibration Description 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NAVAIR 17–20AQ–70

SECTION 1

INTRODUCTION AND DESCRIPTION

1.1 This procedure describes the calibration of the Fluke 515A Portable Calibrator. The instrument being

calibrated is referred to herein as the TI (Test Instrument).

1.2 All comments concerning this procedure should be directed to Navy Measurement Science Directorate,

Naval Warfare Assessment Division, P.O. Box 5000, Corona, CA 91718–5000.

1.3 This procedure includes tests of essential performance parameters only. Any malfunction noticed during

calibration, whether specifically tested for or not, should be corrected.

Table 1. Calibration Description

Performance

Specifications

Characteristics Test

Method

Line regulation

DC voltage output

Frequency response

Voltage output for a 10% line voltage

change:

V range: 1 V or less

1V or 10V Range: 1 ppm of range or

less

100V Range: 10 ppm of range

or less

Range:

V: 0 to 999 V continuous with

1 V resolution

Tolerance: 2 V

1V: 0.0 to 1.0V in 0.1V steps

10V: 0 to 10V in 1V steps

100V: cardinal point

Tolerance: 0.003% of setting or 30

V whichever is greater

Range: 10V

Output frequencies: 10V, 400 Hz, 4

kHz, or 50 kHz

1 or 100V: 400 Hz

Voltage tolerance:

1V: 0.05%

10V: 0.04%; 400 Hz or

4 kHz, 0.1%;

50 kHz 100V: 0.06%

The TI output voltage is moni-

tored as the line

voltage is changed.

1, 10 and 100V TI output: Veri-

fied by a standard–cellrefer-

enced direct voltage measure-

ment system.

DC microvolt output:

Verified by using the voltage di-

vider to step down the voltage

output of the

standard–cell–referenced

direct voltage measurement

system.

10 Volt DC decade output:

Compared TI output with

the DC voltage calibrator

output by using ratio

measurement.

10V output tolerance is

verified at all frequency

output by using the thermal

transfer method.

NAVAIR 17–20AQ–70

Performance

Specifications

Characteristics Test

Method

AC voltage output

Frequency output

Resistance

Same as above

Tolerance: 400 Hz or 4 kHz; +1%; 50

kHz; +5%

Range: 10Wthrough 10 MWin

decade steps

Tolerance:

0W; 150 milliohms or less

(residual W)

10Wto 100W; +0.06% +

residual W

1 kWto 1 MW; +0.015% +

residual W

10 MW; 0.075% +residualW

Power rating: 0.2 watt

The AV source output is set to

obtain a reference null; then the

TI output is

substituted and the

deviation from the

reference–null is measured.

Verified with an electronic

counter

Measured with the resistance

measuring system

SECTION 2

EQUIPMENT REQUIREMENTS

NOTE

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. Satisfactory performance of alternate items shall be

verified prior to use. All applicable equipment must bear evidence of current calibration.

The instruments utilized in this procedure were selected from those known to be available at

Navy calibration facilities, and the listing by make or model number carries no implication of

preference, recommendation, or approval for use by other agencies. It is recognized that

equivalent equipment produced by other manufacturers may be capable of equally satisfactory

performance in this procedure.

NAVAIR 17–20AQ–70

Minimum Use

Specifications

Item Calibration

Equipment

2.1 Autotransformer

2.2 Multimeter

2.3 Differential

voltmeter

2.4 Direct voltage

measurement

system

consisting of:

2.4.1 Null detectors

2.4.2 Reference

divider

2.4.3 DC voltage

calibrator

2.4.4 DC transfer

standard

2.4.5 Accessory kit

leads

2.5 Voltage divider

2.6 Thermal transfer

standard

2.7 Differential

voltmeter

Range: Input 115V, output adjustable

between 105 and 125V

Current: 200 mA

Uncertainty: N/A

Range: 105 to 125 volts av

Input impedance: 5 kW/V

Uncertainty: +5%

Range: 0 to 125V

Null range: must be able to discriminate +10

mV deviations

Uncertainty: N/A

Ranges: 1, 10, or 100V

Uncertainty:

1V range; +7.5 ppm of output

10V range; +12.8 ppm of output

100V range; +13.2 ppm of output

Shielded low–thermal cable with

low–thermal spade lugs

Ratio range: 0 to 1.1 with a 1.1 input tap

Resolution: 0.1 ppm of input with 7

decades

Uncertainty: 1 ppm of input

Measurement uncertainty when corrected for

AC–DC difference, 1V to 100V, 400 Hz to

50 kHz; 120 ppm of input

Range: 1 to 100V; av to 50 kHz

Uncertainty: N/A

(Prime interest is repeatability)

General Radio W5MT3A

or W10MT3A

Simpson 260 series

John Fluke 895A

Fluke 7105A:

John Fluke 845AB

(2 required)

John Fluke 750A

John Fluke 332A or 332B

John Fluke 731B or 731A

Fluke P/N 6016–278887

” P/N 6016–278895

” P/N 6016–279893

” P/N 6016–278403

” P/N 6016–278911

” P/N 6016–278929

” P/N 6016–278945

” P/N 6016–278937

John Fluke 720A

John Fluke 540B

John Fluke 931B01 or 931AB

NAVAIR 17–20AQ–70

Minimum Use

Specifications

Item Calibration

Equipment

2.8 Alternating

voltage (AV)

source

2.9 Electronic counter

2.10 Resistance

measuring

system

Range: 0 to 100V av

Uncertainty: 0.01 to 100V, to 20 kHz;

0.023%

Frequency range: 400 to 50 kHz

Uncertainty: 0.25% of input

Range: 0.01 ohm to 10.01 megohms

Uncertainty: 0.005%

Hewlett–Packard 745A

John Fluke 5200A

Hewlett–Packard 5245L

Electro Scientific

Industries 242B,

C, or D

SECTION 3

PRELIMINARY OPERATIONS

3.1 Set all equipment controls as necessary to avoid damage to the equipment and so that dangerous voltages

will not be present on the terminals when the power switches are turned on, or when circuit test configurations are

being changed for further calibration tests.

3.2 Connect all auxiliary equipment to the appropriate power source, set all power switches on, and allow one

hour for the equipment to stabilize.

3.3 Set the autotransformer for 115V av output and connect equipment as shown in Figure 1.

3.4 Set the TI POWER switch to on.

Figure 1. Line Regulation Test Configuration

2.1

AUTOTRANSFORMER HI

LO TI

2.2

MULTIMETER

2.3

DIFFERENTIAL

VOLTMETER

60 ~

LINE

NAVAIR 17–20AQ–70

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 LINE REGULATION TEST

4.1.1 Set the TI control(s) for a 10V dc output, and adjust the differential voltmeter control(s) as required for a

reference null indication.

4.1.2 Adjust the autotransformer output voltage to 105V, and verify that the differential voltmeter indication is

10 V or less.

4.1.3 Adjust the autotransformer output voltage to 115V and reestablish a reference null on the differential

voltmeter.

4.1.4 Adjust the autotransformer output voltage to 125V, and verify that the differential voltmeter indication is

10 V or less.

4.1.5 Adjust the autotransformer output voltage to 115V, set the TI for a minimum output, and disconnect the

test configuration.

4.2 DC VOLTAGE RANGE TEST

4.2.1 Set the dc voltage standard controls as follows:

Power switch to STDBY/RESET

Voltage Range switch to 100

Voltage dials set for 100V output

Voltage Trip switch to 100 (332B)

Voltage Trip vernier fully cw

Meter switch to voltage

Current Limit control as required

NAVAIR 17–20AQ–70

4.2.2 Set the reference divider controls as follows:

Std Cell Circuit switch to Open

Input Voltage switch to 100

Output Voltage switch to 100

Standard Cell Voltage Dials to Calibrated Value of DC

Transfer Standard

4.2.3 Set the controls on both null detectors as follows:

Operate–zero switch to Zero

Range switch to 10 mV

4.2.4 Connect the equipment as shown in figure 2.

4.2.5 Set operate–zero switch of both null detectors I and II to OPR, then adjust the zero control of each null

detector to obtain a null indication on the 10 V range as follows:

NOTE

To isolate, offset, and/or minimize unwanted voltage pick up, mainly thermoelectric voltages,

which may contribute to false indications, the null detectors shall be zeroed in the

operate–condition.

4.2.5.1 Lift and connect each positive () or Hi terminal of each voltage source (TI, Fluke 731A, and 332A or

332B) to each of its output negative (–) or Lo terminal.

4.2.5.2 Set the reference divider standard cell circuit switch to locked.

4.2.5.3 Adjust the zero control of each null detector for a zero (null) indication; then, set the null detectors

operate–zero switch to zero.

NAVAIR 17–20AQ–70

Figure 2. DC Output Voltage Range Test Configuration

GUARD

NULL

DET II

(BATTERY

OPERATED)

REF DIVIDER

2.4.1

COM

GUARD

LO OUTPUT INPUT

DC TRANSFER

STANDARD

(BATTERY OPERATED)

2.4.4

DC VOLTAGE

CALIBRATOR

GUARD OUT

SENS

–––

–

NULL

DET I

2.4.1

(BATTERY OPERATED)

2.4.3

2.4.2

4.2.5.4 Reconnect the applicable test configuration (Figure 2 or 3).

4.2.6 Set the dc voltage standard power switch to operate.

4.2.7 Perform calibration in accordance with the following table as follows:

4.2.7.1 For each operation zero”, set the null detectors operate–zero switch (sw) to zero; make the required

equipment settings and switch the null detectors operate–zero switch to operate.

4.2.7.2 During each operation Null I”, set the DC voltage standard output voltage control(s) and/or adjust the

reference divider coarse and fine controls to obtain a null on the null detector I 10 V range; then, verify that the

null detector II indication is within the applicable tolerance limit listed.

Null Detectors TI Range Reference Divider DC Voltage Null Det. I Tolerance

Operation Settings Input SW Output SW Standard Operation Limits

”Zero” 100V 100V 100V 100V ”Null I” 3 mV or less

” 10V 100V 10V 100V ” 300 V or less

” 1V 100V 1V 100V ” 30 V or less

4.3 DC MICROVOLTS OUTPUT AND LINEARITY TEST

4.3.1 Set equipment control(s) to allow circuit changes without causing damage to the equipment whenever

applicable.

4.3.2 Connect equipment as shown in Figure 3.

NAVAIR 17–20AQ–70

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