Tolerance narrow

The end product specification of a process may be defined by a customer (e.g. gas quality), by transport requirements (e.g. pipeline corrosion protection), or by storage considerations (e.g. pour point). Product specifications normally do not change, and one may be expected to deliver within narrow tolerances, though specification can be subject to negotiation with the customer, for example In gas contracts. 

This type of coil was prepared from copper cladded printed circuit board material by applying photolithographic techniques. The p.c. board material is available with difierent copper thicknesses and with either a stiff or a flexible carrier. The flexible material offers the opportunity to adapt the planar coil to a curved three dimensional test object. In our turbine blade application this is a major advantage. The thickness of the copper layer was chosen to be 17 pm The period of the coil was 100 pm The coils were patterned by wet etching, A major advantage of this approach is the parallel processing with narrow tolerances, resulting in many identical Eddy current probes. An example of such a probe is shown in fig. 10. 

The narrow tolerances to be maintained for the total separator thickness are tightened even further by the trend towards high-performance batteries with many thin electrodes, and therefore many separators also. One can easily calculate that for, say, ten or more electrodes and an equal number of separators per cell, the permitted tolerances become very small for fitting the electrodes/separators stack into the cell container. With electrodes and separators... 

Narrow tolerances are required in complicated applications (in plastics, this is associated in some cases with considerable expenditure)... 

Look up a standard method of measurement (e.g., the determination of iron in an ore, found in most quantitative analysis textbooks). Are factor tolerances specified What might be the economic consequences of insufficiently controlling a factor that has narrow tolerances What might be the economic consequences of controlling too closely a factor that actually has wide tolerances ... 

An option to consider in using the WA technique is tolerance weighting. The rationale for this approach is that taxa occurring over a narrow range of an environmental gradient should be better indicators than taxa with broader tolerances. Consequently, taxa with narrower tolerances should be weighted... 

Even when the risk of toxic side effects from a particular drug has been evaluated, it must be weighed against the expected benefits. The use of a very dangerous drug with only a narrow tolerance between the therapeutic and toxic doses may still be justified if it is the sole treatment for an otherwise fatal disease. However, a relatively safe drug may be inappropriate if safer compounds are available or if the condition being treated is trivial. 

There is a demand for quality assurance of recycled polymers, not only for high-grade applications. The properties of the recyclate must be specified and guaranteed within narrow tolerances by the manufactures according to the needs of their customers. 

Crop safety, drift injury to nontarget plants, and hazards to the environment and the operator contributed to the complexity of weed management decisions. Products with difficult handling characteristics or narrow tolerances for crop injury were put aside as improved herbicides became available. Weed scientists were struggling to learn when and how to best control weeds and how to best convey information to growers about this important emerging agricultural discipline. 

A distinction is made between technical and methodological calibration. Technical calibration is based on process technology modules (dosage unit, thermostat) and on modules of the technique of measurement (filter characteristics of photometer). Methodological calibration is employed in the analytical method. It is the aim of methodological calibration that the data obtained have narrow tolerance limits of scatter around a target value. A prerequisite for this that the technical calibration is accurate within prescribed tolerance limits. 

Usually, certified reference materials are reported with a certified value of a determinand, together with narrow tolerance limits within which the result of the analysis should lie. The certified value may be obtained as a mean of values reported by a variety of methods, or it may be a method-based value determined using a specific method. For example, this may involve extracting the determinand with a known solvent composition. 

Retrospective analysis of historical data can be used to assess process reliability [88]. The initial process capability specifications are established based on a few runs (usually less than around 5-10) with acceptable results [30]. This number of runs often is too small to accurately define and characterize actual process variability [30,31]. It can be difficult to claim that the previously set process capability specifications were flawed after validation runs fail to meet them [30]. Thus, the selection of acceptance criteria must consider the benefits of broad versus narrow tolerance ranges. 

The choice of the process depends, inter alia, on the requirements of the end product with injection molding, narrower tolerances can be achieved than with thermoforming or rotomolding, for example. The nature of the polymer also plays a role it depends, for instance, on the stability of the polymer at the high temperatures in a process. The length of the rubbery region on the temperature scale determines the ease of vacuum forming too brittle a polymer is difficult to machine, for example. 

The LT films are usually stretched with the aim of improving the mechanical properties in the machine direction. This is necessary for products like sound-recording tapes and adhesive tapes. The thickness and mechanical properties must be within very narrow tolerances and, in addition, the strength in the transverse direction must be high enough to prevent splitting. This can be achieved by various methods which will now be discussed. 

If the variance of the service level increases, then the losses will increase too and if the average of the service level is far from the target value, then the losses will increase too. As a result, the right service level curve should be centred in the target value (average) and with a narrow tolerance (variance). 

Since many biomolecules have narrow tolerance limits of pH, temperature, osmotic pressure, surface charges, among others, liquid/liquid extraction may be appropriate for these situations. For extracting proteins, the use of organic solvents is not appropriate since these molecules are susceptible to denaturation. Alternatively, proteins can be purified by using systems composed of two immiscible aqueous phases. ... 

Rosin type (sample) n. Sample of rosin, or a mold of thermosetting plastic material, used as an unofficial standard in grading rosin. Such sample shall be so selected, sized and surface-finished that it will have the form of an approximate 7/8in. cube with at least two opposite faces having smooth parallel surfaces and shall have a color when viewed through these faces which matches within rather narrow tolerances the color of the corresponding official government standard. 

The high-resolving power of the MSI system described here and the capability to extract m/z ratios with narrow tolerance windows allows us to see in color-coded manner that peptides with similar m/z ratios can be localized to different areas of the tissue. This is exemplified for three different peptides with monoisotopic (singly charged) w/z ratios of 1,010.590 (green), 1,010.472 (blue), 1,011.410 (red) in Fig. 25.8 seelSiotc 8). 

A zinc alloy with 4% A1 is by tonnage almost as important as brass but not so well known. It has very good casting properties and is primarily intended for pressure die casting. In spite of strong competition from plastics materials, components utilizing pressure die cast zinc alloys have retained a considerable market share for special types of equipment Complicated and thin-walled parts can be manufactured with narrow tolerances. As the alloy is easily polished, it is used when decorative surfaces are required. This is utilized in, for instance, the automotive and computer industries. 

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