Emergency stop

The cabinet system includes full radiation safety in the form of dual, forced breaking door interlocks so that there can be no risk of exposure outside the cabinet. Equally the system is equipped with emergency stops and red lights indicating when X-rays are on, in accordance with the international regulations. 

Gas compressor anti-surge (GM-OFF) control circuit, comprising transmitters, computers and pneumatic control valve Reverse flow protection (on axnal compressors only) as supplementary protection device against surging, working independently of the control circuit Expander emergency stop valve with pneumatic actuator and solenoid valve... 

Expander emergency stop valve with pneumatic actuator and solenoid valve... 

Synchronization can only be accomplished with the emergency stop circuitry in the normal mode, previously described. If there is an emergency fault during the synchronization process, the e-stop contact will open and override the synchronization mode. 

Stop, start, emergency stop and speed controls are grouped adjacent to the engine, and the machine is usually equipped with instrumentation for monitoring its safe operation. Very often, a centralized control room is provided, particularly when there are a number of units in operation. Typical signals monitored and recorded remotely are ... 

Engine speed High Emergency stop Operated... 

Emergency stop valves must not he placed in tunnels or ducts, since personnel may he subject to additional danger trying to operate them. 

The nip is the radial distance or V formed between rolls on a line of centers. In-going safety devices in the nip areas are built into these machines. They protect the hands of operators. An emergency stop device is placed in an accessible location on the upstream side. 

Safety Systems. A safety system is provided with built in safety shutdowns and emergency stop buttons. Crash buttons are located in the laser room, the laser table enclosure and the dome. The laser system is tied into the Observatory emergency stop system. Included both in the laser room and on the laser table are surveillance cameras, heat exchangers, alcohol sensors and fire detectors. In addition to personnel safety features, extensive interlocks have been installed in the laser to prevent the operator from inadvertently damaging it. 

Fire fighting equipment should be mounted at heights that are easily accessible by the average person. This includes portable fire extinguishers, hose connections to fire hydrants, access to emergency shutoff valves, emergency stop/ESD push buttons, etc. 

Red a. Stop buttons or electrical switches used for emergency stopping of machines. b. Emergency stop handles or bars on machines. c. Hazardous operation indicating lights on control, alarm panels, or in the installation. d. Fire protection equipment and systems (e g., fire hydrants, monitors, reels, alarms, etc.). e. Portable flammable liquid containers. f. Stop condition. g. Identification of ESD isolation valves and actuators. 

AVhen a verb is used, the interviewer may ask, How, exactly For example, shutting down the reactor may mean, gradually reducing the feeds in normal shutdown mode or it may mean hitting the emergency stop button. 

Fig. 9.4b Transient of a three kilowatt SOFC system undergoing a simultaneous loss of fuel and removal of load (emergency stop). Data points are shown at 1-minute intervals. The higher potential achieved here versus that in Figure 9.4a at zero load results from the relatively dry purge gas used. The slightly negative current shown here at zero load is due to a small DC-bias in the experimental...

With continuous processes, different stages must be considered steady state, start up and shut down, emergency stops, and so on. 

What state I/O devices should move to in the event of an Emergency Stop... 

How to deal with adjacent process units when a Hold or Emergency Stop is initiated on... 

Unit Model Generic Describes each phase in structured English describes how the Unit Hold and Emergency Stop function... 

Unit Specification(s) Specific For each plant unit defines the unit type, phases, control modules, equipment modules. Hold and Emergency Stop states, interlocks, and transfer routes... 

Verify correct operation of process sequences during water simulations tune control loops. Ensure all process paths are tested, including any emergency stop and hold conditions. Verify correct operation of any recipe management and batch data recording during these tests. 

To allow an emergency stop, an independent pipe supplies nitrogen to the reactor. If necessary, the air flow can be rapidly stopped and substituted by nitrogen. 

Should an emergency occur requiring immediate shutdown and over-ride of normal sequenhal shutdown, an EMERGENCY STOP pushbutton is provided for this purpose. This device interrupts power to all components in the oxidation unit control circuit, shuts down all motors, and closes the vacuum line valve and the chlorine pressure-reducing valve (PRV). The EMERGENCY STOP pushbutton is also used as a reset device to restore the system to normal operating status after an alarm situation has occurred. 

Know the location of Local start/stop switches Valves Controllers Control boards and panels Instrumentation Equipment Emergency stops Remote start/stop switches Safety equipment ... 

Is the dryer in a safe area The dryer s environment may be another consideration to look at from the standpoint of personnel access to emergency stop buttons on the equipment. The location should be where an employee can reach the button when in a panic state. Proper dust collection equipment should be specified for a situation where the system is exhausting gases. This can be in the possible form of a bag house, a cyclone, or a scrubber. It is also possible to have a situation where two or three of the above are required. 

Emergency stop push button next to a sight port on a test furnace. 

Emergency stop switches could be provided in a safe position, adjacent to the aerials, to switch off the scanners and transmitters. 

The synthesis of lactate is an emergency stop-gap measure that is undertaken because of... 

For example, the annex describes requirements for control devices (clearly visible, outside dangerous zones) and emergency stop devices. Work equipment presenting hazards due to emission of gases, vapors, liquids, or dust has to be fitted with containment or extraction devices near the source. 

An emergency STOP button on the external MCU, which when depressed, immediately issues a... 

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