Instruction manual
35
Correction Factor * 0v DC + Correction Offset = 7.35
Correction Factor * 5v DC + Correction Offset = 22.39
The first equation is pretty easy because zero times anything is zero. We quickly realize that:
Correction Offset = 7.35
Using that number, and some basic algebra, you solve the second equation and determine:
Correction Factor * 5v DC + 7.35 = 22.39
Correction Factor * 5v DC = 15.04
Correction Factor = 3.008
With this procedure and two known-values, you can determine the Correction Factor and Correction Offset for most automotive
sensors. If you need assistance please post on the user forums at DashDAQ.com. Be sure to include a link to the user’s manual of your
sensor!
CONVERTING AN ANALOG VOLTAGE INTO PHYSICAL UNITS
Navigate to “Parameters” by tapping on [Setup] from the Main Menu, then [Devices], then [Parameters]. Use the arrows at the top to
find the analog input you would like to scale.
Figure 31: Setting parameters for an analog input
These parameters are used when converting an analog signal into physical units:
• Correction Factor: Multiplier for the raw voltage. Described in section 0.
• Correction Offset: Added to the raw voltage Describe in section 0.
• Corrected Reading Name: Abbreviation to identify corrected signal. Used as a gauge label and displayed on the assign signals
screen.
• Corrected Reading Units: Physical units for the calculation. Any automatic Imperial/Metric occurs afterward. For example, if a
calculation results in °C the number could be automatically converted to °F before display.
• Corrected Reading Min: Default minimum value; used for round gauges and graphs. You can override this for each gauge on
the assign signals screen
• Corrected Reading Max: Default maximum value; used for round gauges and graphs. You can override this for each gauge on
the assign signals screen
NON 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. Tap on an empty slot and tap [Change].