A light which is operated automatically and may be maintained in service automatically for extended periods of time, but with routine visits for maintenance purposes. Also called UNWATCHED LIGHT.
Related Terms |
DISPOSABLE
An element intended to be discarded and replaced after one service cycle.
|
EMISSION SPECTROMETER
Works on the basis that atoms of metallic and other particular elements emit light at characteristic wavelengths when they are excited in a flame, arc, or spark. Excited light is directed through an entrance slit in the spectrometer. This light penetrates the slit, falls on a grate, and is dispersed and reflected. The spectrometer is calibrated by a series of standard samples containing known amounts of the elements of interest. By exciting these standard samples, an analytical curve can be established which gives the relationship between the light intensity and its concentration in the fluid.
|
GROUP OCCULTING LIGHT
An occulting light in which the occultations are combined in groups, each group including the same number of occultations, and in which the groups are repeated at regular intervals. The intervals of light separating the occultations within each group are of equal duration and this duration is clearly shorter than the duration of the interval of light between two successive groups.
|
HAND LEAD
A light sounding lead (7 to 14 pounds), usually having a line of not more than 25 fathoms
|
GROUP QUICK LIGHT
A quick flashing light in which a specified group of flashes is regularly repeated
|
ANTI-WEAR ADDITIVE
Improves the service life of tribological elements operating in the boundary lubrication regime. Anti-wear compounds (for example, ZDDP and TCP) start decomposing at 90° to 100°C and even at a lower temperature if water (25 to 50 ppm) is present.
|
API ENGINE SERVICE CATEGORY
Gasoline and diesel engine oil quality levels established jointly by API, SAE, and ASTM, and sometimes called SAE or API/SAE categories; formerly called API Engine Service Classifications.
|
BREAKDOWN MAINTENANCE
Maintenance performed after a machine has failed to return it to an operating state.
|
FLUID OPACITY
Related to the ability of a fluid to pass light.
|
FLUID COMPATIBILITY
The suitability of filtration medium and seal materials for service with the fluid involved.
|
