Table 9.

Uncertainty values of instruments.

Instruments	Ranges	Accuracy	% Uncertainty
Stopwatch	–	+ 0.5s	0.2
Manometer	0–200 mm	+ 1 mm	1
Tachometer	0–10,000 rev/min	+ 10 rpm	0.1
Smoke meter	0–100 BSU	+ 0.1	1
Exhaust gas temperature	0–900 °C	+ 1 °C	0.12
Pressure transducer	0–110 bar	+ 0.1 bar	0.2