Voltmeter

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Ingenium, 1982.0068.001
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OBJECT TYPE
Vacuum tube/DC
DATE
1950
ARTIFACT NUMBER
1982.0068.001
MANUFACTURER
Keithley Instruments Inc.
MODEL
200B
LOCATION
Cleveland, Ohio, United States of America

More Information


General Information

Serial #
14781
Part Number
1
Total Parts
1
AKA
N/A
Patents
N/A
General Description
Metals/ Plastic/ Leather.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length
14.5 cm
Width
12.7 cm
Height
23.4 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Energy-electric
Category
Measurement
Sub-Category
N/A

Manufacturer

AKA
Keithley
Country
United States of America
State/Province
Ohio
City
Cleveland

Context

Country
Canada
State/Province
Ontario
Period
Unknown
Canada
The artifact was used by the national research laboratories in electrical engineering.
Function
Used to measure very low D.C. voltages (small).
Technical
Canada's National Research Council used a wide range of instruments from many North American firms. This instrument is often described as an electrometer which is capable of measuring current, charge, voltage and resistance. On the Keithley web site (in 2008) this model is listed with other "older" ones and a current equivalent is identified, since many of the older products are "at or near the end of their serviceable life".
Area Notes
Unknown

Details

Markings
Markings found on scale reads: "KEITHLEY INSTRUMENTS/ [logo] K/ CLEVELAND, OHIO" ; Info. found at bottom of front plate reads: "Keithley dc vtvm model 200B" ; Mfr. plate on bottom reads: "[logo] K/ KEITHLEY INSTRUMENTS, INC./ CLEVELAND, OHIO/ MADE IN U.S.A./ SERIAL NO. [stamped in] 14781" ; Sticker on right side of cabinet reads: "NATIONAL RESEARCH / ELECTRICAL ENGINEERING/ LABORATORIES" ; Stencilled NRC number bellow sticker reads: "040" ; **See S.I. file for 'Condensed Instructions' found on back of the voltmeter.
Missing
No input leads.
Finish
Grey case/ Black knobs/ Black & red markings. Artifact is a grey rectangular box with a leather handle on the left side. It has a face with 2 scales, each double range. Beneath the face, there are 5 dials plus a LED. There are 2 terminals beside them. On top, there is a large red push button and another terminal.
Decoration
NRC sticker & stencilled inventory no. on side of casing.

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Keithley Instruments Inc., Voltmeter, circa 1950, Artifact no. 1982.0068, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1982.0068.001/

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