NATIONAL BUREAU OF STANDARDS REPORT

3202

XNTSBJL&BCRATCRY IHTERCCMPARISQMS

100-W&TT G&S-FIHED

TUNGSTBN^FHAMENT LAMPS

By

Ray Pe Teele

cr

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
U. S. DEPARTMENT OF COMMERCE

Sinclair Weeks, Secretary NATIONAL BUREAU OF STANDARDS

A. V. Astin, Director

THE NATIONAL BUREAU OF STANDARDS

The scope of activities of the National Bureau of Standards is suggested in the following listing of

the divisions and sections engaged in technical work. In general, each section is engaged in specialized research, development, and engineering in the field indicated by its title. A brief description

of the activities, and of the resultant reports and publications, appears on the inside of the back

cover of this report.

Electricity. Resistance and Reactance Measurements. Electrical Instruments. Magnetic

Measurements. Electrochemistry.

Optics and Metrology. Photometry and Colorimetry. Optical Instruments. Photographic

Technology. Length. Engineering Metrology.

Heat and Power. Temperature Measurements. Thermodynamics. Cryogenic Physics. Engines

and Lubrication. Engine Fuels. Cryogenic Engineering.

Atomic and Radiation Physics. Spectroscopy. Radiometry. Mass Spectrometry. Solid State Physics. Electron Physics. Atomic Physics. Neutron Measurements. Infrared Spectros- copy. Nuclear Physics. Radioactivity. X-Ray. Betatron. Nucleonic Instrumentation. Radiological Equipment. Atomic Energy Commission Radiation Instruments Branch.

Chemistry. Organic Coatings. Surface Chemistry. Organic Chemistry. Analytical Chemistry.

Inorganic Chemistry. Electrodeposition. Gas Chemistry. Physical Chemistry. Thermochemistry.

Spectrochemistry. Pure Substances.

Mechanics. Sound. Mechanical Instruments. Fluid Mechanics. Engineering Mechanics. Mass

and Scale. Capacity, Density, and Fluid Meters. Combustion Control.

Organic and Fibrous Materials. Rubber. Textiles. Paper. Leather. Testing and Specifications. Polymer Structure. Organic Plastics. Dental Research.

Metallurgy. Thermal Metallurgy. Chemical Metallurgy. Mechanical Metallurgy. Corrosion.

Mineral Products. Porcelain and Pottery. Glass. Refractories. Enameled Metals. Concreting

Materials. Constitution and Microstructure. ' Building Technology. Structural Engineering. Fire Protection. Heating and Air Conditioning. Floor, Roof, and Wall Coverings. Codes and Specifications.

Applied Mathematics. Numerical Analysis. Computation. Statistical Engineering.

Electronics. Engineering Electronics. Electron Tubes. Electronic Computers. Electronic

Instrumentation. Process Technology.

Radio Propagation. Upper Atmosphere Research. Ionospheric Research. Regular Propagation

Services. Frequency Utilization Research. Tropospheric Propagation Research. High Frequency

Standards. Microwave Standards.

^Office of Basic Instrumentation ^Office of Weights and Measures.
NATIONAL BUREAU OF STANDARDS REPORT

MBS PROJECT NBS REPORT

0201“2(%=0205 April 5, 1954 3202

INTERLABCEATCEY INTERCCMPAjRISQNS

cr

100-WATT GAS-FILLED

TTOGSTEN-FILAI^NT LAMIS

By

Ray P, Teele

Photometry and Colorimetry Section

Optics and Metrology Division

<NBS>

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

n. „„

Approved for public release by the

TMi,

i

Director of the National Institute of

25 ,d.c. Suchpermi Standards and Technology (NIST)

cal ly prepared If tha| on October 9, 2015

part, Is prohibited

idards, Washington

irt has been speclfiprt for its own use.

INTERLABCRAT CEY INTERCOMPARISONS

OF

10Q-WATT GAS-FILLED

TUNGSTEN-FILAMENT LAMPS

By

Ray P. Teele

ABSTRACT

A group of twelve 100-watt gas-filled, tungsten-filament lamps were

measui _d at one laboratory and at the National Bureau of Standards foi

luminous flux before and at the NES after circulation to the participating laboratories. The twelve lamps were divided into two groups of six

lamps each, one group remaining at the NBS after the first measurements

to serve as a control group, the other six lamps being circulated to the

various laboratories. The average of the luminous flux of the four

surviving lamps of the six lamps circulated was 1612 lumens and the maximum departure of any laboratory was just under 1 percent, the average

deviation being 0.5 percent.

I. INTRODUCTION

This intercomparison was undertaken to determine the uniformity of

measurements of luminous flux for this type and size of lamp at the participating laboratories. The laboratories participating and the order

of reading are as follows:

1. General Electric Company

2. National Bureau of Standards

3. Westinghouse Lamp Division

4. Electrical Testing Laboratories, Inc.

5. Sylvania Electric Products Inc.

6. Champion Lamp Works

7. National Bureau of Standards

The order of reading was chosen to reduce shipment of th^ lamps as much as possible. Each laboratory followed its own customary procedure

in making the measurements.

II. MEASUREMENTS FOR THE CONTROL GROUP

The values of voltage, current, and luminous flux for the uncirculated control group of six lamps are given in Table I. The General

Electric Company measured all of the lamps prior to shipment to the NBS.
i
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Table I. Values for the Control Group

NBS

Lamp

Number

Volts

(Set)

QE

Amps Lumens

1st

Amps Lumens

2nd

Amps Lumens

NBS3158 120.0 0.8158 1589 0.8146 1589 0.8138 1586

NBS3160 120.0 .8148 1600 .8142 1601 .8127 1591

NBS3161 120.0 .8151 1597 .8144 1600 .8150 1597

NB33162 120.0 .8180 1622 .8164 1623 .8158 1617

NBS3165 120.0 .8217 1628 .8210 1630 .8208 1634

NBS3166 120.0 .8166 1602 .8166 1608 .8160 1610

Average 0.8170 1606 0.8162 1608 0.8157 1606

The results given in Table I indicate that no change occurred

in the control group during the intercomparison.

III. MEASUREMENTS FOR THE CIRCULATED GROUP

The values of voltage, current, and luminous flux obtained at

each of the participating laboratories are given in Table II. The

laboratories are arranged in the order in which the lamps were measured.

Table II. Values for the Circulated Group

Lamp Volts Lumens

Number ,j (Set) GE NBS West, ETL Sylvania Champion NBS

NBS3155 120,0 1594 1603 1609 Broken

NBS3156 120.0 1585 1596 1603 1575 1586 1583 1578

NBS3157 120.0 1582 1592 Broken

NBS3159 120,0 1614 1597 1632 1610 1630 1617 1618

NBS3163 120,0 1610 1617 I644 $625 1644 1634 1625

NBS3164 120.0 1610 1603 1632 1615 1626 1612 1611

Average of all 1599 1601 1624 (5) ~

.

.» —

Average of four 1605 1603 1628 1606 1622 1612 1608

Mean of four for

all laboratories 1612
ii
- 3 -

Table lie (Cont l d) Values for the Circulated Group

Lamp

Numbei

Volts

(set) GE NBS

Amperes

West, ETL Sylvania Champ, NBS

NBS3155 120.0 0.8120 0.8122 0.8105 Broken

NBS3156 120.0 ,8201 .8204 .8174 0,817 0.819 0.830 0.8178

NBS3157 120.0 .8145 „ 8144 Broken 0 _ . NBS3159 120,0 .8182 .8146 .8152 .816 .818 .827 .8170

NBS3163 120,0 .8173 ,8166 ,8172 ,818 .819 .829 .8177

NBS3164 120.0 ,8181 .8164 ,8152 ,818 ,818 .829 .8170

Average of all .8167 .8158 .8151(5)

Average of four .8184 .8170 .8162 .8172

• 818C5 ,828g .8174

IV. SUMMARY

There is no indication of any significant change in luminous flux

having occurred in either the control or circulated group during the

intercomparison. Four of the six participating laboratories are in close

agreement on the value of luminous flux for the average of the four sur- viving lamps; the values being 1605, 1606, 1606, and 1612 (Mean of 1607).

Two of the six laboratories depart by an important amount from these four

laboratories and in the same direction, both of them obtaining higher

values for the luminous flux of the average of the four remaining lamps

of the circulated group.

One laboratory reported currents that were not in agreement with

those measured at the other five laboratories.

>

It is felt that this intercomparison will enable the participating

laboratories to bring their results into agreement on a sound common

basis.

In connection with the results on these lamps it may be of interest

to note that the 1950-1952 international intercompari sons carried out

at the International Bureau of Weights and Measures in Paris showed that

the relative value of the unit of luminous flux at 2788°K, as realized

at the NBS, was 0.997^ when the mean of the five participating laboratories is considered to be unity.

r , Rapport sur la Deuxieme Comparison des E+alons Nationaux d* Intensity

et de Flux Lumineux (1950-1952) par J. Terrien et H. Moreau.
. ..

• • .
THE NATIONAL BUREAU OF STANDARDS

Functions and Activities

The functions of the National Bureau of Standards are set forth in the Act of Congress, March

3, 1901, as amended by Congress in Public Law 619, 1950. These include the development and

maintenance of the national standards of measurement and the provision of means and methods

for making measurements consistent with these standards; the determination of physical constants and properties of materials; the development of methods and instruments for testing materials,

devices, and structures; advisory services to Government Agencies on scientific and technical

problems; invention and development of devices to serve special needs of the Government; and the

development of standard practices, codes, and specifications. The work includes basic and applied

research, development, engineering, instrumentation, testing, evaluation, calibration services, and

various consultation and information services. A major portion of the Bureau’s work is performed

for other Government Agencies, particularly the Department of Defense and the Atomic Energy

Commission. The scope of activities is suggested by the listing of divisions and sections on the

inside of the front cover.

Reports and Publications

The results of the Bureau’s work take the form of either actual equipment and devices or published papers and reports. Reports are issued to the sponsoring agency of a particular project or program. Published papers appear either in the Bureau’s own series of publications or in the

journals of professional and scientific societies. The Bureau itself publishes three monthly periodicals, available from the Government Printing Office: The Journal of Research, which presents

complete papers reporting technical investigations; the Technical News Bulletin, which presents

summary and preliminary reports on work in progress; and Basic Radio Propagation Predictions,

which provides data for determining the best frequencies to use for radio communications throughout

the world. There are also five series of nonperiodical publications: The Applied Mathematics

Series, Circulars, Handbooks, Building Materials and Structures Reports, and Miscellaneous

Publications.

Information on the Bureau’s publications can be found in NBS Circular 460, Publications of

the National Bureau of Standards ($1.00). Information on calibration services and fees can be

found in NBS Circular 483, Testing by the National Bureau of Standards (25 cents). Both are

available from the Government Printing Office. Inquiries regarding the Bureau’s reports and

publications should be addressed to the Office of Scientific Publications, National Bureau of Standards, Washington 25, D. C.
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