Warning Devices.Part

EN 12613 Plastics warning devices for underground cables and pipelines - specification Part 1 warning devices with visual characteristics (type A). 

Any sort of warning device may be used as a fire alarm provided that it makes a distinctive sound which is audible in all parts of, and is understood by all those in, the premises. 

Vehicles subject to the law must be inspected eveiy 6 months. For trucks, truck tractors, trailers, and semi-trailers, the inspection shall be conducted in accordance with Appendix G to Part 396 procedures. Required safety equipment emergency warning devices and fire extinguisher) is not subject to inspection during an Appendix G inspection. 

Equipment which produces microwave radiation can usually be shielded to protect the users. If size and function prohibits this, restrictions on entry and working near an energised microwave device will be needed. Metals, tools, flammable and explosive materials should not be left in the electromagnetic field generated by microwave equipment. Appropriate warning devices should be part of the controls for each such appliance. Commercially-available kitchen equipment is subject to power restrictions and controls over the standard of seals to doors, but regular inspection and maintenance by manufacturers is required to ensure that it does not deteriorate with use and over time. 

Someday we will have small portable devices that sample and analyze during exposure to the workplace atmosphere. Devices small enough to be worn comfortably by an active person, devices that will give warnings in real-time when danger of hazardous exposure occurs. These devices may be in the form of integrated circuits with sensors covered with permi-selective membranes, the combination of which will lead to both sensitive and selective measurements. Ten years from now current methods and devices may be, for the most part, but a memory. 

A double-pole disconnect device (switch, breaker, other) should be used and should disconnect both poles simultaneously. In some products a single-pole device may be allowed to disconnect only the phase conductor when the neutral can be verified, but this is often not possible since plugs are reversible in many EU countries, such as in Germany. Parts that remain live after the disconnect device is opened (OFF) shall be guarded against accidental contact by service personnel and a warning label is necessary adjacent to the hazard areas. 

A device that detects the presence of various gases within an area, usually as part of a system to warn about gases that might be harmful to humans or animals. Various types of gas detectors are used to detect primarily combustible, toxic, and oxygen levels (i.e., deficiency), and carbon monoxide and carbon dioxide gases. They are typically used in confined spaces, utilities and chemical plants, industrial hygiene applications, and air quality testing. They can be fixed devices or portable devices worn by an individual. See also Combustible Gas Detector. 

The high-high level device provides an independent means of determining the level in the tank and is part of the overfilling protection system. It provides a warning that the tank rated capacity has been (or is about to be) reached/exceeded and triggers a response ... 

It is obvious that, in addition to the timely aspect, there must be some interaction between the users and the changed transport system—either directly or mediated. Mediated refers especially to new technology applications that provide information and warnings. Previously, the only information source for the driver was his or her own eyes and senses when encountering different situations such as, for example, bad weather, a crash, or the end of a queue. Now, these same situations can also be partly perceived or experienced via personal or in-vehicle devices, perhaps even on a road network on which one is not currently travelling. In that sense, a driver s interaction with the actual situation is mediated . This type of interaction differs somewhat from indirect interaction, which usually means that the driver... 

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