Pennsylvania Standards Laboratory
The Pennsylvania Standards Laboratory (PSL) provides
metrological traceable calibrations of artifacts relating to mass, volume,
length, time and force. The services below are available to the weights and
measures community, private industry, service companies, municipal governments,
and other state government agencies.
Advanced calibration of mass standards from 30 kg to 1
mg, 1000 lb to 0.001 lb and 8 oz to 1/32 oz.
Medium accuracy calibration of mass standards from
2500 kg to 1 mg, 5000 lb to 0.001 lb, 12 oz to 0.01 oz, 200 oz t to 0.005 oz t
and 1000 gr to 0.1 gr.
of weight carts from 6000 lb to 2000 lb.
of Class IIII scales (wheel-load weighers) up to 40 000 lb.
Gravimetric calibrations of volumetric standards from
100 gallon to 1 gallon, 5 gallon (Imperial) and 500 liter to 5
Calibration by volume transfer method of neck-type metal
provers from 1500 gallon to 5 gallon and 5000 liter to 5 liter.
calibrations of steel tapes up to 200 ft.
and timer calibrations up to 24 hour.
calibrations of push-pull gauges by tension up to 50 lbf.
Class IIII Scale (Wheel Load Weigher) Calibration
Pennsylvania State Police, Pennsylvania Department of Transportation and many
municipal governments throughout the Commonwealth have vehicle weight
enforcement programs. The PSL requires the use of National Type Evaluation
Program (NTEP) approved Class IIII Scales (Wheel Load Weighers). Title 75 Pa C.S.A. requires these scales to be certified annually (or following any event that could affect the accuracy or following repairs or failures) by the Pennsylvania Department of General Services. These calibrations are conducted by appointment at the Pennsylvania Standards Laboratory.
Forms & Resources
Public Fee Schedule establishes fees for calibration services. All local (including municipal police departments), state and federal government agencies are exempt from fee payments.
Schedule Request Form may be used to request a date for scheduling calibration at the Pennsylvania Standards Laboratory. Completed forms can be faxed or emailed to the PSL.
Bio Medical Cleanliness Form must accompany items that have been exposed to any hazardous substance to ensure items are safe for human handling.
Preparation of Large Volume Provers Form must
accompany any provers (1500 gallon/500 liter to 25 gallon/100 liter) that are
submitted for calibration to document that the prover has been cleaned and is
free from any petroleum products or residue before the start of the
Submission Requirements Cast Iron Weights provides recommendations for the cleaning and painting of
weights. Although not required to be painted before submission, the condition
of weights should be evaluated before submitting them for calibration. Cast
iron weights that are not free from foreign matter such as dirt, rust, grease,
concrete or asphalt will not be calibrated.
Submission Requirements Test Measures provides the criteria that must be met before your volume measures will be calibrated.