2. Data recording, processing and retention
The concentration of the exhaust gas shall be recorded, using recording devices specified in 1.2. The data shall be adequately processed and retained. Records of the relevant engine performance and zero/span check, and other data shall also be recorded and retained.
3. Specifications for the equipment to ensure that its reliability is maintained during service
If the NOx analyzer calibrated on land is performing the zero/span check by zero/span check method which is under development on-board, the analyzer reliability is regarded as maintained.
3.1 General
As a means to ensure that the reliability of the analyzer is maintained, the zero/span check and periodic calibration of the analyzer shall be made. The zero/span check method and the intervals of periodic calibration of analyzers are under development.
3.2 Periodical calibration of the analyzers
3.2.1 Repeatability
The repeatability of the analyzer shall be within +/-2% of full scale.
3.2.2 Measurement error (Linearity error)
The measurement error of an analyzer shall be within +/-5% of full scale.
4. Specifications for environmental testing of the device
For details of environmental testing of the analyzer and recording device, description in IACS UR E10. shal1 be observed.
5. Specifications for the testing of the analyzer to demonstrate that it has a suitable accuracy, repeatabitity and cross sensitivity compared with the applicable sections of this Code
The testing conditions, testing method and criteria concerning the testing of the analyzer to demonstrate that it has a suitable accuracy, repeatability and cross sensitivity are shown in Reference document 1.
6. Form of the approval certificate to be issued by the Administration
The style of the document format of the approval certificate of the analyzer and recording device (issued to the device which has passed the environmental and performance tests of manufacturer's factory of measuring instruments specified in 4 and 5) is shown in Style 1.
