AEM 30-5131M Analog EGT Metric Gauge User Manual
Page 5
Page 5
Status Lights
The AEM Analog EGT Gauge has one status light, see Figure 6. The status light will
flash whenever the sensor is disconnected.
Analog Output
The analog output from the AEM Analog EGT gauge is a linear dc voltage signal that
varies from 0.5 Vdc at 0 Degrees Fahrenheit (-18 Degrees Celsius) to 4.5Vdc at
1800 Degrees Fahrenheit (982 Degrees Celsius) 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 functions for the analog
output are listed below in Degrees Fahrenheit and Degrees Celsius.
Temperature (Degrees Fahrenheit) = 450 * Voltage - 225
For example, if the output is 2.5 Vdc, the temperature is 900 Degrees Fahrenheit.
450 * 2.5
– 225 = 900 Degrees Fahrenheit
Temperature (Degrees Celsius) = 250 * Voltage
– 143
For example, if the output is 2.5 Vdc, the temperature is 482 Degrees Celsius.
250 * 2.5
– 143 = 482 Degrees Celsius
A list of output voltages and corresponding temperatures is shown below in Table 1.
Figure 6. Illuminated Status Light
Error
Status
Light