BTS Master MT8221B and MT8222B : General Information : Preventive Maintenance
  
Preventive Maintenance
BTS Master preventive maintenance consists of cleaning the unit and inspecting and cleaning the RF connectors on the instrument and on all accessories. Clean the BTS Master with a soft, lint‑free cloth that is dampened with water or with water and a mild cleaning solution.
Caution
To avoid damage to the display or case, do not use solvents or abrasive cleaners.
Clean the RF connectors and center pins with a cotton swab dampened with denatured alcohol. Visually inspect the connectors. The fingers of N(f) connectors and the pins of N(m) connectors should be unbroken and uniform in appearance. If you are unsure whether the connectors are good, gauge the connectors to confirm that their dimensions are correct.
Visually inspect the test port cables. The test port cable should be uniform in appearance, not stretched, kinked, dented, or broken.