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you with a NIST (US National Institute of
Standards and Technology) traceable
certificate. This “annual checkup” assures
you of consistently accurate readings; it is
especially important in applications where
strict calibration records must be main-
tained.
Send the instrument to TSI Instruments
Ltd. prepaid. Securely package your
instrument in a strong container sur-
rounded by at least 5 cm of suitable shock-
absorbing material. Include a purchase
order that clearly shows the instrument
model number and serial number, a contact
name, phone, fax number, and RMA
number. Mark the outside of your shipping
container with the RMA number. This will
expedite processing of your instrument
when we receive it.
Field Verification
Field verification of your CO
2
instrument is
recommended monthly. You need a gas
tank and regulator. Calibration grade gases
are available through local industrial gas
supply.