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  • Controlling Sound Level- Electronic Method
    For piezoelectric type audible alarms, the larger the voltage signal applied to the piezoelectric. transducer, the louder the sound level. This property can be used to electronically control the. sound level of these devices.
  • Controlling Sound Level- Mechanical Method
    There are two ways to control sound level in an electronic audible alarm. One is mechanical. and the other is electrical. The mechanical method involves changing the size of the front hole. opening of the audible alarm. The open area in the front of the audible alarm including the front. hole
  • Switch Tips: Electro-Optic Level Switches
    Electro-optic level switches are used to signal the presence or absence of a liquid. They contain an infrared light-emitting diode (LED) and a light receiver. Light from the LED reflects from a prism forming the tip of the device back into the light detector. With no liquid present, most LED light
  • How to Determine the Safety Integrity Level (SIL) of a Safety System
    performance, although testing is still essential because some dangerous failures can be only detected through periodic maintenance. The challenge for system engineers is to design a system in such a way as to prevent dangerous failures or to control them when they arise. For a Gas Detection System
  • Laying the Groundwork for Better Control
    with the "tried and true. " At the same time, though, more pharmaceutical manufacturing operations appear to be developing the building blocks they will need for improved control: integrating incompatible databases, connecting field-level data to the plant floor, improving data quality to allow for process
  • Town of Eckville Stops Pump Station Call Outs With New PSL 5.0 Pump Station Level Controllers
    Soon after start-up Eckville operators began receiving call out alarms from the control systems in both pump stations. The cause of the echo loss problem was hard to figure out because it was intermittent.
  • Don t Drift out of Control
    By Dan Collins, Manager of DCS Solution Partner Program, Siemens Energy & Automation The proof of concept is a series of alpha level tests. A 1,000-sample test data using random numbers to simulate sensor noise and biasing the noise to simulate drift was created using Microsoft Excel. The data
  • Biopharmaceutical Process Control: Part Two: Process Modeling
    By Michael Boudreau and Gregory McMillan, Emerson Process Management These blocks in turn contain at the lowest level composite blocks representing Michaels Mention saturation kinetics combined with inhibition. This block architecture allows for the creation of a library and the flexibility
  • NI LabView 8 debuts
    Project streamlines application development and device management. Teams may now work collaboratively with system-file management and source-code control. The datalogging and supervisory-control module (DSC) implements alarms, events, and user-level security. Data acquired is

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