Care and maintenance

The most delicate part of the pH-meter is the glass electrode which may crack or break, if handed roughly or may dry up when left out of water for a long period. Under such situation 

The values of pH given by this definition differ very slightly from the formal definition. 

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An extraordinary document which explains with eloquence and passion how we should go about the care and maintenance of a small planet . 

A number of limitations are imposed by the construction of the instrument and its operating parts, including such factors as fully charged or new dry cell batteries, replacement of drying agents or other chemicals and, of course, how well the moving or consumable parts such as filaments have been maintained. Most instrument failures from these causes can be prevented by routine care and maintenance, and by periodic calibrations. 

Friction Friction clutches tend to be more complex in design than positive clutches. Their complexity, coupled with reliance on friction for power transmission, demands constant care and maintenance. As a result, they require regular adjustment and good preventive maintenance to ensure trouble-free operation. 

General details for the care and maintenance of ion-selective electrodes are given in Ref. 31. 

J Marlow, (a) Care and Maintenance of pH and redox electrodes (b) Care and Maintenance oflon-Selective Electrodes. In International Laboratory, Vol XII, Part 2, 1987... 

Control of environmental factors is important to product quality. Air quality and air movement, care and maintenance of the area, and personnel movement and attire are of particular importance. 

Three illustrated data sheets cover the choice siting, care and maintenance and use of portable fire extinguishers [1]. Detailed accounts of modem extinguishing... 

Numerous protocols describing the care and maintenance of Xenopus laevis frogs and the isolation of oocytes from their ovaries have been published (Cohnan, 1984 Goldin, 1992 Quick and Lester, 1994 Stiihmer and Parekh, 1995 Theodoulou and Miller, 1995). The following methods are based primarily on the procedures described by Yao and colleagues (2000). 

NFPA 1852 Standard for Selection, Care, and Maintenance of Open-Circuit SCBA... 

The methods presented here provide the basis for conducting zebrafish developmental toxicity research. Some fundamental procedures for the care and maintenance of a zebrafish colony for the purpose of collecting embryos has been provided, but greater detail and other procedures have been published elsewhere (12-14). While there are many very large zebrafish facilities and several very technically advanced zebrafish labs, one of the most attractive elements of the zebrafish (Fig. 1) as a model of embryonic development is how readily and inexpensively experiments can be performed. 

The GLP standards specify that the laboratory must have SOPs for particular activities at a minimum. Most laboratories find that implementation of GLPs will cause a dramatic increase in the number of SOPs used by the facility. They are an effective and easy way to document a procedure and to ensure that the staff is trained in the correct procedure. Standard Operating Procedures are hving documents and require care and maintenance however. 

Other uses in production might include tooling care and maintenance. It is important to note that because of the way in which the force is set on production presses, the punch lengths must be matched exactly, or the force signal will vary. Therefore, if one observes one station of tooling with a force value different from the others, it probably indicates an incorrect punch length. 

The care and maintenance of an additional piece of electronic equipment. 

As with all delicate equipment, the pH meter and electrode must receive proper care and maintenance. All electrodes should be kept clean and stored in solutions suggested by manufacturers. Glass electrodes are fragile and expensive, so they must be handled with care. If pH measurements of protein solutions are often taken, a protein film may develop on the electrode it can be removed by soaking in 5% pepsin in 0.1 M HC1 for 2 hours and rinsing well with water. 

For the consumer, proper care and maintenance can prevent many of the causes of damage. Proper storage and methods of hanging are important. Watercolor paintings and other works on paper, for instance, should be matted and framed behind glass to protect them. Acid-free mat board should be used. Special glass that filters out harmful light rays that may fade the work is also recommended. Many articles and books about the care and maintenance of art of all types are available (see References in this chapter). 

Good care and maintenance of a firearm are the best protection against corrosion. There is a wide range of commercial gun cleaning and maintenance products available. 

R. Waller and D. E. McAllister, in Proceedings of the 1985 Workshop on Care and Maintenance of Natural History Collections (J. Waddington and D. M. Rudkin, eds.), p. 93. Life Sciences Miscellaneous Publications of the Royal Ontario Museum, Toronto, 1986. 

Aluminum compressed air cylinder safety has been an important issue in recent years. Safety procedures regarding the use, care and maintenance of compressed air cylinders have been in placed to ensure the public safety. Many attentions have been paid especially so-called sustained-load cracking (SLC) failures. SLC is a metallurgical anomaly that occasionally develops in high-pressure cylinders made generally from aluminum alloys. 

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