AEM 30-2067 X-WiFi Wideband UEGO & EGT Controller - Manual (Page 9)

Page 9
The analog EGT outputs from the AEM X-WIFI are linear dc voltage signals that vary
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 X-WIFI.
The signals are 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 outputs 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 6.
VOLTAGE °F °C
0.50 0 -18
0.75 113 45
1.00 225 107
1.25 338 170
1.50 450 232
1.75 563 295
2.00 675 357
2.25 788 420
2.50 900 482
2.75 1013 545
3.00 1125 607
3.25 1238 670
3.50 1350 732
3.75 1463 795
4.00 1575 857
4.25 1688 920
4.50 1800 982
Configuration
The AEM X-WIFI has two configuration buttons. Configuration button one is used for
accessing the WIFI setup options. Configuration button two is used for future updates.
See Figure 8.
Table 6. Analog EGT Calibrations