Special Features:

Mfg name is multifunction acoustic calibrator. Operates on four 1.5 volt alkaline batteries, or ni-cd cells iec lr6, also has a battery low led. Included items are 1/2" microphone adaptor p/n dp 0681, 1/4" microphone adaptor p/n dp0781, 2.5mm mini jack plug 2ea. P/n jp0213, 4 ea. Alkaline batteries, instruction manual. Some of the uses are calibration and comprehensive check of 1/2" and 1/4"microphone set-ups and acoustic instruments complying with iec651 and ansis 1.4-1983 such as sound level meters, dose meters ect also checks of filter sets and other frequency-dependent instruments.Frequency range tones from31.5hz to 16khz in octave steps, plus tone at12.5khz

Properties:

An item that, when used with an associated audio frequency signal generator, determines by comparison the output level of an audio frequency voltage. The meter is marked in volts or submultiples thereof. For items utilizing a meter the scale of which is marked in decibels or comparable units, and which do not require a driving oscillator, see meter, audio level. See also meter, modulation and meter, s-units.