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This is an IRD vibration analyzer model 311A. This instrument works well; it includes the pickup model 544AN, strobe model 566, interconnecting cables, power cord and operation manual. Amplitudes are selectable in 4 ranges (x100, x10, x1, x.1) filter is tunable from 500~5000 CPM meter displays P to P vibration in mills. The manual is a bit frayed from use but seems complete with schematic. Instrument is contained in a well-crafted wooden case. Guaranteed functional. Yellow tagged with an ‘A’ condition code.
(Ird vibration analyzer model 311A was posted and is owned by: Shanna Walters) |
shanna_walters@chicagopartsnetwork.com (Shanna Walters) for more information.
