Cleaning monitoring

Categories for exhaust air (EHA) are also defined in prEN 13779. Normally the EHA category for air to be discharged outdoors is the same as ETA, but if the system includes reliable and monitored cleaning equipment, the category can be one lower. With these provisions, air from industrial processes with very high pollution level, in category ETA 4 can be cleaned to EHA 3 levels. 

Monitor Cleaning Solution Strength. Analytical checks of solution strengths should be made on a routine basis. The correction of solution strength by making small and... 

British Standards Institution (1989). Environmental Cleanliness in Enclosed Spaces. Part 0. General Introduction, Terms and Definitions for Clean Rooms and Clean Air Devices, BS 5295 Part 0. Part 1, Specifications for Clean Rooms and Clean Air Devices. BS 5295 Parti. Part 2. Specifications for Monitoring Clean Rooms and Clean Air Devices to Prove Continued Compliance with BS 5295 Part 1, BS 5295 Part 2. London Her Majesty s Stationery Office. 

Check the calibration of the conductivity monitor Clean the sensor... 

Cleaning - he suggested that a lab-on-a-chip device could be used to monitor cleaning in equipment. 

Hr TVs and computer monitors. Clean screens by wiping them down with a microfiber cloth lightly dampened with distilled water. Dust the plastic parts, then wipe down with a vinegar-and-water solution as needed, avoiding electronic components. Use compressed air to dust in crevices. 

Performance monitoring, cleaning, control, and automated maintenance systems and smart transmitters must not make uniiaterai decisions. 

Undeniably, one of the most important teclmological achievements in the last half of this century is the microelectronics industry, the computer being one of its outstanding products. Essential to current and fiiture advances is the quality of the semiconductor materials used to construct vital electronic components. For example, ultra-clean silicon wafers are needed. Raman spectroscopy contributes to this task as a monitor, in real time, of the composition of the standard SC-1 cleaning solution (a mixture of water, H2O2 and NH OH) [175] that is essential to preparing the ultra-clean wafers. 

A quantitative analysis for NH3 in several household cleaning products is carried out by titrating with a standard solution of HGl. The titration s progress is followed thermometrically by monitoring the temperature of the titration mixture as a function of the volume of added titrant. Household cleaning products may contain other basic components, such as sodium citrate or sodium carbonate, that will also be titrated by HGl. By comparing titration curves for prepared samples of NH3 to titration curves for the samples, it is possible to determine that portion of the thermometric titration curve due to the neutralization of NH3. 

Environmental Considerations. Environmental problems in Ziegler chemistry alcohol processes are not severe. A small quantity of aluminum alkyl wastes is usually produced and represents the most significant disposal problem. It can be handled by controlled hydrolysis and separate disposal of the aqueous and organic streams. Organic by-products produced in chain growth and hydrolysis can be cleanly burned. Wastewater streams must be monitored for dissolved carbon, such as short-chain alcohols, and treated conventionally when necessary. 

Finishing sprays and spritzes are sprayed on clean, dry hair and tested for drying time, stiffness, combing ease, flaking after combing and stickiness upon contact with moisture. Additionally, hair hoi ding properties are evaluated by measurements of the cud retention at various humidities. Standardized water-set cuds are sprayed with standard amounts of product under controlled circumstances. They are then dried, placed into vadous humidity levels, and the cud fall monitored at vadous time pedods. 

Tank bottom slope is important because sediment, water, and heavy phases settle at the bottom. Corrosion is usually the most severe at the bottom, and the design of the bottom can have a significant effect on the life of the tank. In addition, if the Hquid stock is changed, it is usually desirable to remove as much as the previous stock as possible. Therefore, designs that allow for the removal of water or stock and the ease of tank cleaning have evolved. In addition, specialized tank bottoms have resulted from the need to monitor and detect leaks. Tank bottoms in contact with the soil or foundations are one of the primary sources of leaks from aboveground tanks. 

Monitoring The differential pressure across the arrester element can be monitored to determine the possible need for cleaning. The pressure taps must not create a flame path around the arrester. It can be important to provide temperature sensors, such as thermocouples, at the arrester to detect flame arrival and stabilization. Since arrester function may involve damage to the arrester, the event of successful function (flame arrival) may be used to initiate inspection of the element for damage. If the piping is such that flame stabihzation on the element is a realistic concern, action must be taken immediately upon indication of such stabihzation (see also Endurance Burn ). Such action may involve valve closure to shut off gas flow. 

The impressed current method with metal oxide-coated niobium anodes is usually employed for internal protection (see Section 7.2.3). In smaller tanks, galvanic anodes of zinc can also be used. Potential control should be provided to avoid unacceptably negative potentials. Pure zinc electrodes serve as monitoring and control electrodes in exposed areas which have to be anodically cleaned in the course of operation. Ag-AgCl electrodes are used to check these reference electrodes. 

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