• Abnormal sound from a camcorder or digital camera might be caused from a damage of a built-in motor or foreign material, or an operation section etc. In an inspection of products before delivery, operators actually inspect abnormal sound by hearing check. You could choose another method using microphone as it is an inspection of abnormal sound, but it requires enough space and much cost for sound insulating box to reduce the influence of back ground noise. In this example, a sensor is mounted on a measurement object and the VC-3200 vibration comparator detects abnormal sound by vibration. The VC-3200 can capture and make judgment up to three kinds (three bands simultaneous judgment).
   
• The VC-3200 can be setup three frequency bands and make Pass/Fail judgment based on rms, peak on each band or power averaging calculated value (same for all bands). Also it has effective functions such as comparator delay time setup function and auto operation function. Comparator delay time setup function removes unwanted signal at the time of starting measurement and automatic operation function can control a timing of judgment by inputting a control signal from external device such as PLC*. Although the VC-3200 can be operated by 24VDC (22 to 26VDC) as standard, you have an alternative to use it at 100 VAC by connecting an optional AC/DC convertor VC-0352.
   
• When a measurement object is light weighted type, please use compact and light weighted accelerometer NP-3418 etc.
   
• Connecting the VC-3200 to a PC via RS-232C interface enables storing measured data and so on.
   
• By connecting a pair of commercially sold headphones to the VC-3200, it is possible to make hearing check of vibrating sound. Moreover, it can be used instead of conventional stethoscopic probe. Output signals are provided for each band, enabling an observation for vibration phenomenon on each frequency band separately.

* PLC: Programmable Logic Controller