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calibration, Return Material Authorization
(RMA) number, and shipping instructions.
Please have the following information
available when you call:
• Owner’s name, address, and phone
number
• Billing address, if different and
applicable
• Instrument name and model
• Serial number
• Date of purchase
• Where purchased
TSI recommends that you keep a “calibra-
tion log” and keep all records of service on
your instrument.
Factory Calibration
To maintain a high degree of accuracy in
your measurements, TSI recommends that
you return your instrument to the factory
for annual calibration. For a nominal fee,
we will calibrate the unit and return it to
you with a NIST (US National Institute of
Standards and Technology) traceable
certificate. This “annual checkup” assures
you of consistently accurate readings; it is