The operating conditions of the setup are monitored by measuring
pressures, temperatures and rotational speed. The pressure in
the combustion chamber is measured using a GE PMP 1400 sensor
with an accuracy of ±2% of its range 0–16 barg, including errors due
to thermal effects. Two RS Type 461 sensors measure the pressure
in the fuel line, one in the alternative fuel circuit of the FSS (see
Fig. 2) and one just in front of the atomizer. These sensors work
with an accuracy of ±0.25% in their range 0–100 barg and have
been calibrated using a GE Druck DPI 104. All pressure sensors
are connected to analog ports of the NI USB-6009 data acquisition
device