DashDAQ EOT-ECT Gotcha
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Elder User
Joined: Jul 2009
Posts: 919
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From: Smiths Grove, KY
DashDAQ EOT-ECT Gotcha
I recently purchased a DashDAQ and wanted to display and enable an alarm set-point for EOT, ECT, and EOT-ECT differential. I used the rescale calculator to compute the EOT-ECT differential, however the value was not correct. What I later determined was that the raw signal from the EOT PID is in degrees Celsius. This signal is automatically converted when it is displayed, however the rescale calculator uses the original units. In my case both the EOT and ECT were 90 deg F, however my differential was -58 which comes from EOT 32 deg C – ECT 90 deg F.
<O
</O
In order so solve this problem I had to use the rescale calculator to convert the EOT signal to deg F then use this calculated value in a second rescale calculator to compute the differential. Below is the set-up for both calculators for those that might be interested.
<O</O
EOT (converted from deg C to deg F)<O</O
Input Signal: EOT (from Ford specific list)
Multiplier Signal: Constant Multiplier From Rescale Calculator
Multiplier Sign: 1
Constant Multiplier: 1.8
Offset Signal: Constant Offset From Rescale Calculator
Offset Sign: 1
Constant Offset: 32
Name: EOT_F
Units: deg F
Precision: 0
<O</O
<O</O
EOT – ECT<O</O
Input Signal: EOT_F (from rescale calculator)
Multiplier Signal: Constant Multiplier From Rescale Calculator
Multiplier Sign: 1
Constant Multiplier: 1
Offset Signal: ECT (from Generic list)
Offset Sign: -1
Constant Offset: 0
Name: EOT - ECT
Units: deg F
Precision: 0
<O
</OIn order so solve this problem I had to use the rescale calculator to convert the EOT signal to deg F then use this calculated value in a second rescale calculator to compute the differential. Below is the set-up for both calculators for those that might be interested.
<O
</OEOT (converted from deg C to deg F)<O
</OInput Signal: EOT (from Ford specific list)
Multiplier Signal: Constant Multiplier From Rescale Calculator
Multiplier Sign: 1
Constant Multiplier: 1.8
Offset Signal: Constant Offset From Rescale Calculator
Offset Sign: 1
Constant Offset: 32
Name: EOT_F
Units: deg F
Precision: 0
<O
</O<O
</OEOT – ECT<O
</OInput Signal: EOT_F (from rescale calculator)
Multiplier Signal: Constant Multiplier From Rescale Calculator
Multiplier Sign: 1
Constant Multiplier: 1
Offset Signal: ECT (from Generic list)
Offset Sign: -1
Constant Offset: 0
Name: EOT - ECT
Units: deg F
Precision: 0
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
LOL--I'm jealous of you guys that have those. I loved having Jake's for a short while. It's almost distracting because of the wealth of information that it provides. I didn't have it long enough to figure out 1% of what it can do.
Logistics Pro
Joined: Feb 2004
Posts: 4,460
Likes: 14
From: The Land Of Time
I'm still learning, but I am no computer guy, took me almost 2 years to figure out how to pos up pics on the boards.
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