Instruction manual

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The Linear Driver is for measuring signals that have a constant input voltage change for a given change in what’s being measured. An
example is a sensor that has a 0.1V output change for every temperature degree it’s measuring. 3 terminal sensors that have a voltage
input, a voltage output, and ground are often linear sensors.
The Non Linear Driver is for measuring signals that do not have a constant input change for a given change in what’s being measured.
An example is a NTC (negative temperature coefficient) type resistive temperature sensor, which is very common in vehicles. The NTC
temperature sensor will change resistance by a few ohms per degree at high temperatures and many thousands of ohms per degree at
cold temperatures. 2 terminal resistive temperature sensors are usually non-linear.
The 10-pin DashDAQ accessory cable must be purchased to connect these sensors and is always available at DashDAQ.com.
CONNECTIONS AND WIRING
Connect the analog input signal you wish to measure to either Analog In 1 or Analog In 2 on the DashDAQ. See the end of this manual
for the I/O cable wiring table.
LINEAR ANALOG INPUT DRIVER SETUP
To setup an analog sensor in DashDAQ (sensor pre-wired to accessory cable assumed, see section 0):
1. From the DashDAQ Main Menu tap on [Setup], then [Devices], then [Manager].
2. A DashDAQ typically comes in original packaging with analog sensors pre-populated in the Device Manager. If you do not see
“Analog Input” in any of the driver slots (a-h) then tap on an empty slot and tap [Add Device].
3. Use the [<] or [>] buttons at the top to find the “Other” heading. Tap on [Analog Input] to highlight and tap [Install].
4. Select which port (analog-1 or analog-2) you would like to use. (Figure 29)
5. Your analog sensor is now specified as a input in the Device Manager and can be assigned to any gauge to be viewed as
voltage. To understand how to scale the signal to a specific unit see the next section (Section 0).
Figure 29: DashDAQ comes preloaded with both Analog Inputs. If you needed to
reinstall, you’d use Device Manager to install AnalogInput in an available slot
Figure 30: Then you’d specify either Analog-1 or Analog-2. To read both, just load
the driver twice in two different slots.
LINEAR ANALOG DRIVER CORRECTION FACTOR AND CORRECTION OFFSET
Let’s pretend that you have an Innovate LC-1 wideband controller and you’d prefer to see an Air-Fuel ratio instead of a raw voltage.
DashDAQ is able to convert a linear raw voltage signal into physical units using the following formula:
Corrected Value = Correction Factor * Raw Voltage + Correction Offset
This procedure will help you find values for Correction Factor and Correction Offset. The LC1-1’s instruction manual says that its 0-5v
analog output represents AFR=7.35 to AFR=22.39. With that information you can setup two equations: