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The tank had a level gauge that employees used to monitor the level manually, and an independent high-level switch which would shut off inflow if the level got above a certain setpoint. On Tank 912, the manual gauge was stuck and the independent shut-off switch was inoperative, meaning that the tank was being "filled blind" with petrol (i.e ...
Alarm Annunciator used for process controls Alarm Annunciators being used in electricity distribution substations Example of an Alarm Annunciator that would be used in a variety of different plants. Annunciator panels were relatively costly to install in a plant because they had dedicated wiring to the alarm initiating devices in the process plant.
The term flashbulb memory was coined by Roger Brown and James Kulik in 1977. [2] They formed the special-mechanism hypothesis, which argues for the existence of a special biological memory mechanism that, when triggered by an event exceeding critical levels of surprise and consequentiality, creates a permanent record of the details and circumstances surrounding the experience. [2]
For example, a PLC may control the flow of cooling water through part of an industrial process to a set point level, but the SCADA system software will allow operators to change the set points for the flow. The SCADA also enables alarm conditions, such as loss of flow or high temperature, to be displayed and recorded.
Normally, all levels of EU-Alert are treated the same by the device. The same notification type and sound are emitted regardless of level. Depending on national implementation, users may be able to opt-out of receiving lower level alerts. However, the highest level of alert will always be displayed on a user's device. [7] [3]
High-intensity discharge lamps are a type of arc lamp. Brand new high-intensity discharge lamps make more visible light per unit of electric power consumed than fluorescent and incandescent lamps, since a greater proportion of their radiation is visible light in contrast to infrared. However, the lumen output of HID lighting can deteriorate by ...
ISO 7010 is an International Organization for Standardization technical standard for graphical hazard symbols on hazard and safety signs, including those indicating emergency exits.
In neuroscience, low-level would relate to the functioning of a cell (or part of a cell, or molecule) and high level to the overall function or activity of a neural system. [1] In documentation, a high-level document contains the executive summary, the low-level documents the technical specifications.