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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

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Tsi IAQ50 Manuale Utente Pagina 28