Heath Consultants GT Series - Manual (Page 156)

13-2
USER HANDBOOK
13.1 CALIBRATION VALIDITY
Calibration validity is the responsibility of the user. Under
normal operating conditions a 12 month period can be
expected. This is no guarantee, however, as the precise
application of the product is unknown to GMI. Individual
codes of practice may dictate shorter periods.
Regular checking establishes a pattern of reliability and
enables the calibration check period to be modified in line
with operational experience. The higher the risk, the more
frequently calibration should be checked.