Weston Vintage Ammeter AC/DC Portable 1943 ElectroDynamometer Model 370943 USA

Description

Vintage
1943
Weston AC & DC
Portable
Electro-Dynamometer Ammeter
Note:
Operating CondItion
Listing for Parts or Not Working
Not Sure if it is Working
Model 370
Made in USA
New Jersey Circa
Meter been in Storage
This would make a
Unique Addition to  any
Electronic Collection
Wood Case is
Solid Wood
does have
Scratches from
Storage & Age
Leather Handle is Missing
Instruction Sheet is inside
of Front Cover Reads Below
Weston
Model 370 No. 6909
wood box
laboratory grade instrument.
Measures absolute amps.
Magnetically shielded
electro-dynamometer ammeter.
Scale: 0 - 5 or 0
10 amps AC or DC.
Mirrored scale
(for accurate readings)
Dimensions
8-1/2" Wide x
10-1/2" High x 5-3/4" Deep
Weight: 12.2 lb
Made in
USA
circa 1943
Specifications:
Rated accuracy:
0.25% of full scale value
over approximately the
upper 80 % of the linear length
of the scale and 0.17% (0.009 inch)
of full scale length over the
remaining lower portion
of the scale
External Temperature Influence:
Less than 0.2% of full scale value
for ambient temperatures
from 15 to 35 C (59 to 95 F)
Frequency Influence:
Negligible up to 1,000 Hz.
Less than 0.5% of full scale value
from 1,000 to 2,500 Hz
Sustained Operation Influence:
Maximum effect less than
0.2% of full scale value
over a period of 6 hours
External Field Influence:
Maximum effect less than 0.15%
of full scale value
in a field of 5 oersteds
Resistance and Inductance:
Amperage Range:  0 to 5
Resistance 0.178 ohms / I
Inductance 0.072 MH
Amperage
Range
:
0 to 10  Resistance
0.147 ohms / Inductance 0.037 MH
We attempt to give Full
Accurate Descriptions
There are times when
Small Details may
be missed.
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& Ask Questions.
Review the
Description and
Pictures Prior to
Purchase
.
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our Buyers
To be Happy
with their Purchase
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Shipping costs based
on Weight & Zip Code
by the Post Office
Local pick up available