Varec 2500, Installation And Operation Manual

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Varec, Inc. 69
Chapter 7
Maintenance Routines
Varec recommends a regular schedule of maintenance for the 2500 Automatic Tank Gauge
(ATG), outlined in the table below. Actual frequency of inspections and maintenance may vary
depending on the specific environmental conditions and operation at your site—even from
tank to tank. Study your installations, and plan a routine of inspection and maintenance that
best suits your site’s individual needs. Regular maintenance lengthens the service life and
assures more accurate gauge readings. Varec can provide spare parts, maintenance kits, and
preventive maintenance advice, training, or warranties. Please consult your product
Installation and Operations Manual or a representative for more information.
Warning Hazardous environment! 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.
Warning Possible Electrostatic Discharge Hazard! Worker activity and worker clothing
may accumulate electrostatic charges on the body of a worker. The mechanical
connections between guide cables, float, tape, and gauge head 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.
Warning Electrical and hazardous vapor hazards are inherent to the work described in
this manual.
Observe American Petroleum Institute (API) Recommended Practice 2003 or
other appropriate industry or Military Standard.
The following table shows the suggested periodic maintenance and inspection routine for the
2500 ATG. Each element is described in the following paragraphs.
Table 1: Suggested Periodic Maintenance Routines
Routine 90 Days 6 Months 1 Year - Inspect
& Maintain
5 Year - Inspect
& Maintain
10-Year API 653
Overhaul
Operation check X X X
Leak check X X X
Sediment check X X X
Deformation check X X X
Calibration X X
Float and guide cables check X X
Lubricate X
Oil-filled gauge check X
Corrosion check X
Basic Maintenance As required - depending on service condi-
tions.
Extended Maintenance
Refurbish / Overhaul X Recommended