Code of Federal Regulations Title 33. Navigation and Navigable Waters § 33.154.2180 Alternative testing program—Generally

(1) Calibration drift or CD means the difference in the analyzer output readings from the established reference value after a stated period of operation during which no unscheduled maintenance, repair, or adjustment took place;

(2) Calibration error or CE means the difference between the gas concentration exhibited by the gas analyzer and the known concentration of the cylinder gas;

(3) Response time or RT means the time interval between the start of a step change in the system input (e.g., change of calibration gas) and the time when the data recording system displays 95 percent of the final stable value;  and

(4) Sampling system bias or SSB means the difference between the gas concentrations indicated by the measurement system when a known cylinder gas is introduced at or near the sampling probe and when the same gas is introduced directly to the analyzer.

(1) Calibration of instrumentation using standard procedures provided by the manufacturer or service provider;

(2) Monitoring of all interlocks, alarms, and recording devices for proper operation while instrumentation is being calibrated;

(3) Use of a certified gas standard that is within plus or minus two (2) percent of its certified concentration to calibrate the analyzers;  and

(4) Use of a certified secondary standard that is standardized against a primary standard to calibrate the pressure sensors/switches.

(1) All test procedures;

(2) The dates of all tests, type of tests made, and who conducted the tests;

(3) Results of the tests, including the “as found” and “as left” conditions;  and

(4) A record of the date and time of repairs made.