Open Access

Table 4

Uncertainties of measurement instruments.

Instrument Uncertainty
Speed sensor ±0.3
Fuel measuring ±1.0
Dynamometer ±1.0
CO sensor ±3.4
CO2 sensor ±0.34
NOx sensor ±0.1

Overall uncertainty (%) = square root of [(0.3)2 + (1.0)2 + (1.0)2 + (3.4)2 + (0.34)2 + (0.1)2].

The overall percentage of uncertainty is 3.71% which is quite acceptable.

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