Complete calibration and repair services are offered at our Ardmore, Oklahoma manufacturing facility. Calibrations are to original factory specifications and are traceable to NIST (National Institute of Standards and Technology). A certificate of conformance accompanies each repaired tester.

A Return Material Authorization (RMA) number must be obtained from STS Instruments before returning any instrument for repair. Please contact Slaughter at 1-800-421-1921, 1-580-223-4773 or email us at This e-mail address is being protected from spambots. You need JavaScript enabled to view it for assistance and instructions. Transportation costs for the return of the instrument to Slaughter must be prepaid by the customer.

Testers sent for repair should be shipped prepaid and insured to:

Inside the container with the tester, put the name and telephone number of someone to contact if the Service Department has questions regarding the repair and someone to advise of billing. Please indicate your "ship to" address - no PO Boxes please.

Subject to weight restrictions, testers are normally returned to the customer via UPS ground with the actual shipping charges prepaid and added to the invoice. Premium shipping and alternate carriers can be provided upon customer request. Freight charges will vary according to the method/carrier specified.

Factory service is based upon an hourly rate with a one hour minimum charge per tester. Parts needed to bring the testers back to factory specifications are extra.

Altered testers cannot be certified. All non-STS parts will be removed and the customer charged to bring the tester back to original factory specifications before calibration will be attempted.

From time to time testers are received that may be inadvisable to repair due to age, condition and/or obsolescence of parts from suppliers. Customers are notified.

Non-warranty repairs carry a limited warranty of 90 days on services and replacement parts only. Defects in our repair work or any parts replaced will be corrected at no charge if the defect occurs within 90 days from shipment from our factory.

If difficulty arises during the 90-day period that is due to a secondary defect, which should normally be detected during the original service procedure, it will be repaired and a charge made only for parts used.