Varec 6700, Инструкция по установке и эксплуатации

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Varec, Inc. 51
Chapter 4
Maintenance
Periodic Maintenance
Varec Model 6700 Low Pressure Liquid Level Indicators are designed for long service life. Like
any other measuring device, Liquid Level Indicators require regular, periodic service to
maintain the original performance. Table 8 on page 52 provides some suggested periodic
service. Minimum maintenance lengthens the service life and assures more accurate reading
of the indicator.
Varec provides maintenance service contracts that provide regular periodic inspection and
maintenance at substantial savings. Some repair tasks may require special tools.
Warning
Observe appropriate safety precautions in flammable or hazardous liquid
storage areas. Do not enter a tank that has contained hydrocarbons, vapors, or toxic
materials, until a gas-free environment is certified. Carry breathing equipment when
entering a tank where oxygen may be depleted with carbon dioxide, nitrogen or other
gases.
Electrostatic Discharge Hazard
Under most circumstances, the mechanical connections between the guide cables and
anchors provide a resistance to ground that is adequate for the safe electrical drain of
electrostatic charges that may accumulate in the tank and the product. Additional grounding
may be needed for products with low flash points. Worker activity and worker clothing may
accumulate electrostatic charges on the body of a worker. Care should be used in flammable
environments to avoid the hazard. Observe American Petroleum Institute (API) Recommended
Practice 2003 or other appropriate industry or military standard.
Lubrication
Lubricate moving parts of the elbow and indicator sheaves at regular intervals. Use a light-
weight oil.