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BM3 User’s Manual
Parameter Module Tests
Performance assurance for all measurements
not listed below.
At least once every two years, or if you suspect
the measurement values are incorrect.
Parameter Module Maintenance
NBP calibration
At least once every two years, or as specified
by local laws.
Mainstream and sidestream CO
2
calibration check
At least once a year, or if you suspect the
measurement values are incorrect.
Battery Maintenance
Battery
See thesection on Maintaining Batteries in
chapter 1.