A then “state-of-the-art”, high-accuracy, 0-150 V, 0-300 V and 0-750 V, Model 341, electrodynomometer voltmeter built in 1950 and used as a calibration instrument for other run-of-the-mill meters in the CRNL laboratory. The meter, built by the Weston Electric Instrument Corporation of Newark, N.J., USA is housed in a sturdy wooden box that measures 21 cm by 27 cm and is 15 cm high.
This meter was located in a small shop in Barrie, ON, and donated to the Society. It is a “sibling” of another Weston Model 341 voltmeter (artifact 2018-029) acquired in 2018. Both meters are labeled with an N.R.X. label indicating they were used at Chalk River. Although this unit has a tag number of 4268 which would normally indicate it was newer than the earlier tagged one with a number 1296, the serial number of this unit (15469) indicates it was older than the previous one (serial 16022). This information confirms the manufacture date as 1950.
