AEM 30-5144 Analog Boost Fuel Pressure SAE Gauge - Manual (Page 5)

Page 5
Analog Output
The analog output from the AEM 100 PSI Pressure gauge is a linear dc voltage signal
that varies from 0.5 Vdc at 0 psig (0 Bar) to 4.5 Vdc at 15 psig (1 Bar) over the
operating range of the gauge. The signal is used for sending information to a data
logger or an engine management system like the AEM EMS or F/IC. The transfer
function for pressure units in PSI is listed below.
Pressure (psi) = 3.75 x Voltage
– 1.88
The transfer function for pressure units in bar is listed below.
Pressure (bar) = 0.25 x Voltage
– 0.13
A list of output voltages and corresponding pressures is shown below in Table 1.
Voltage Pressure
0.50 0.0 PSI 0.00 BAR
0.75 0.9 PSI 0.06 BAR
1.00 1.9 PSI 0.13 BAR
1.25 2.8 PSI 0.19 BAR
1.50 3.8 PSI 0.25 BAR
1.75 4.7 PSI 0.31 BAR
2.00 5.6 PSI 0.38 BAR
2.25 6.6 PSI 0.44 BAR
2.50 7.5 PSI 0.50 BAR
2.75 8.4 PSI 0.56 BAR
3.00 9.4 PSI 0.63 BAR
3.25 10.3 PSI 0.69 BAR
3.50 11.3 PSI 0.75 BAR
3.75 12.2 PSI 0.81 BAR
4.00 13.1 PSI 0.88 BAR
4.25 14.1 PSI 0.94 BAR
4.50 15.0 PSI 1.00 BAR
Connector Pinouts
The pinouts and wire functions for the 3-pin sensor harness and 8-pin power
harness are provided below in Figure 6 and Table 2.
Figure 6. Harness Pinouts
Table 1. Analog Calibrations