miniDaqu — Manual
3.4
Thermocouples
resistance. The current and voltage are still low enough to be safe to be used
for fuel level sensors submerged in fuel. Figure 5 illustrates connection.
R
C
1
2
1
-
+
BAT
V
GND
3
+5 V
4
AUX
5
6
F
1
F
2
FUEL
P
E
2
7
FL
2
GND
8
E
1
9
FL
1
Y
1
10
ROTOR
GND
+12 V
11
12
Figure 5:
Resistive sensor connection on E channel.
3.4
Thermocouples
Thermocouples can not be connected to mini Daqu. If thermocouples are
essential, then a modified version of standard Daqu must be used.
3.5
Analog Active Sensors
Active sensors require external power to operate and provide some active
signal. Some sensors require 12 V and some 5 V to operate. These sensors are
often used to measure various pressures and, fuel levels, etc. An active sensor
has its own built-in electronics, which takes care for voltage fluctuations. This
makes their signal more stable and robust.
Most of these sensors fall into one of two groups:
Sensors with voltage output.
Sensors with current output.
3.5.1
Voltage Output
Daqu can connect sensors with varying voltage output signal in range of 0-5
V. These sensors can connect to E or F channels.
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