5. Engine ECU Connection
Daqu — Manual
4.13.2
Configuration
Example configuration is made for FT-60 fuel flow sensor, a.k.a.
Red cube
.
This sensor connects to 12 V. Figure 13 shows connection schematics for this
sensor (NPN type). The sensor has 68000 pulses per US gallon. This equals to
68000
/
3
.
7854
≈
18000 pulses per liter. Table 20 shows configuration details.
Option
Selection/Setting
Channel
Any Y
Function
Fuel flow 1
Sensor
Digital Pulse
Report time
0.2 – 0.5 s
Filter
about 0.5 s
Pulses
18000
Correction
1.0
Table 20:
An example for rotor RPM connected to Y channel.
4.13.3
Differential Fuel Flow
In order to measure differential fuel flow, a second fuel flow sensor must be
connected. The first sensor is connected normally and measures fuel flow
towards the engine. The second sensor is connected as Fuel flow 2 and mea-
sures flow from the engine back into the tank. When Fuel flow 2 is configured
and sensor is connected, its reading will be automatically subtracted from the
reading of the Fuel flow 1 sensor. No other configuration is necessary.
Note that each sensor may have its own pulses per liter value. Channel Y1
is typically used for the first fuel flow sensor and Y2 for the reverse fuel flow
(Fuel flow 2).
5
Engine ECU Connection
This Daqu version in not designed to connect to an engine ECU. Mini Daqu
shall be used instead. However, there is a possible exception.
Mini Daqu has quite limited number of additional channels. In addition, it
does not support A type channels, so thermocouple sensors can’t be used.
©
Kanardia
2019
46
