Fluke 515A User manual

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

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NAVAIR 17–20AQ–70
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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
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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
TI
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.
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Performance
Specifications
TI
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.
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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
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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
or
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 ~
AC
LINE
NAVAIR 17–20AQ–70
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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
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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.
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Figure 2. DC Output Voltage Range Test Configuration
HI
LO
GUARD
NULL
DET II
TI
(BATTERY
OPERATED)
REF DIVIDER
2.4.1
IN
COM
GUARD
HI
LO OUTPUT INPUT
HI
LO
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.
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