GLP No. 6
REREQUISITES FOR TESTING IDARDS_AND_ EQUIP!

All standards and equipment submitted for calibration or tolerance testing
should be of good appearance and in good operating condition. It is futile to
test and/or calibrate any item that does not meet the generally recognized
minimum requirements set forth below. When items received do not meet these
qualifications, they should be returned to the submitter for appropriate
action.

Ma: dards

Weights and other devices must be free from all foreign matter, such as
dirt, rust, concrete, grease, and other adhering substances. Old seals should
be removed and plugs loosened unless "as found" values are needed. Spacers in
adjustment cavities shall be furnished by the submitter.

Class "C" or Class"F" test weights, 50 pounds or heavier, must be freshly
painted with an approved type paint, unless they are in extremely good condi-
tion. No painting or touching up should be done by laboratory personnel (unless
special arrangements are made).

St ights

Cast iron weights should be cleaned thoroughly with a wire brush. If a
weight is covered with numerous applications of paint that is beginning to
chip, the weight should be cleaned with paint remover. Do not sand or shot
blast or sandpaper cast iron weights. This method of cleaning removes metal as
well as paint and could result in the weight being rejected.

Gast iron weights should be freshly painted with a good quality, thin coat
of aluminum paint (not an enamel). (See also GLP No. 11).

Stainless Steel or Plated Weights

Stainless steel or plated weights should be washed in alcohol or with
detergent and water to remove all extraneous matter. Care should be taken to
avoid leaving a soapy film on the weight and to prevent the entrance of water
into the adjustment cavity.

Apothecary or Metric Weights

Small weights (up to 100 grams) or weights that are calibrated, should not
be cleaned in the field. If cleaning is necessary, it can be done better
within the facilities in the laboratory. (See GMP No. 5).

Volume Standards

Test measures must be free from all foreign matter. Dents must be removed,
and all leaks repaired. Unless a measure is in extremely good con- dition, it
must be freshly painted with an approved type paint. Gauge tubes, reading
scales, and other test measure components must be in working order, and in a
reasonable good state of repair.

GLP 6-1

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Small liquid measures should be thoroughly cleaned with soap and water and
rinsed thoroughly to prevent a soap film residue.

Field t sures

If a field test measure has been damaged, all dents should be removed and
all leaks should be stopped. Some 5-gallon and smaller measures have Plastic
sight gauges that yellow with age. These should be repiaced as necessary.

All field test measures should be freshly painted using a color appropriate
for the intended use.

2. id 1

All balances and scales should be cleaned and in working order when they
are submitted, with oil in dash pots. Any loose parts should be tightened and
broken parts replaced.

Tank Trucks

All tank trucks shall be clean on the exterior. All safety valves must be
operating properly when the truck arrives. All markers shall be loosened.
Since this work is scheduled by appointment, trucks must arrive at the appoint-
ment time. Truck drivers or customer-designated personnel shall assist
laboratory personnel as requested,

GLP 6-2