Weston Instruments Model 622 DC Precision Microammeter Meter 200 uA FS Mirror Scale

This genuine, original Weston Instruments Model 622 200 uA FS (Full Scale) precision microammeter. This instrument is a half percent class device with a large 6 1/4 x 2 3/4, easy to read parallax free mirror scale window and a jeweled analog mechanical meter movement. It is practicallly unused as it was a calibration standard, a foundation instrument in a metrology laboratory. This robust design DC microammeter is made by the once famous, intrumentation pioneer, the Weston Instruments Company in Newark NJ. The Weston Museum, located in New Jersey Institute of Technology in Newark NJ. This item is no longer available!

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REFERENCE PAGE - INFORMATION ONLY Features: • DC Microammeter Model 622 • MFG: Weston Instruments Company • Range: 200 Micro Amp DC Full Scale • Internal Resistance: 4.0 Ohms @ 25 C° • Correct within Half Percent at any part of scale • Temperature Correction Formula • Made and Certified: June, 15, 1942 • Mirrored Scale - Shorting switch when closed • Large Movement Window: 6.25 W x 2.75 H [in] • Knurled Bakelite on Brass Terminals • 8 W x 7.5 H x 3.8 D with cover [inches] • Made in USA Notes: • No longer Available • Data For Reference Only REFERENCE PAGE - INFORMATION ONLY

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