Who's using a DLP-IO8 for logging? I've not been able to find much information on using one of these wizbang little units.

• What are you logging?
• What sensor(s) are you using .AND. what formula in the evoscan XML
• How is your DLP-IO8 hooked in to evoscan?

I'm looking for information to help me jumpstart getting it set up and logging with my EvoScan GPSNAV and laptop version of evoscan.

Thanks in advance
John-

 

evoscan 2.9 (yet to be released) will read it via usb. i'm sure there will be updated xml files with a special location for the definitions. i'll likely pick one up log multiple pressure sensors (uicp, licp, exhaust manifold, downpipe).

 

I've already updated my GPSNav unit to 2.5 which has support for the dlp-io8 and have looked at the included XML files.

My biggest questions at this point are 1.) How to get the USB data stream into my GPSNav unit? (I'm guessing a USB hub between my 1.3u cable and the GPSNav unit??) and 2.) what are some compatible pressure/temperature sensors and the Eval formula to use with them.

Sample XML that was included in my 2.5 update:

<DataListItem DataLog="Y" Color="" Display="DLP1Digital" LogReference="DLP1Digital" RequestID="DLPIO8" Eval="x" Unit="on/off" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="255" ChartMin="0" ChartMax="255" ScalingFactor="1" Notes="" Priority="1" />

<DataListItem DataLog="Y" Color="" Display="DLP3Analog" LogReference="DLP3Analog" RequestID="DLPIO8" Eval="x" Unit="Volts" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="255" ChartMin="0" ChartMax="255" ScalingFactor="1" Notes="" Priority="1" />

<DataListItem DataLog="Y" Color="" Display="DLP5Temp" LogReference="DLP5Temp" RequestID="DLPIO8" Eval="x" Unit="deg F" MetricEval="x" MetricUnit="deg C" ResponseBytes="1" GaugeMin="0" GaugeMax="255" ChartMin="0" ChartMax="255" ScalingFactor="1" Notes="" Priority="1" />



John-

 

If the GPSNav has only one USB port, then yes, a hub. The scaling formulas need to be determined from sensor specification or calibration sheets.

 

Anyone know if the Pro-Sport gauges will work with this?

 

I just recieved my unit and am trying to figure out how to log a standalone sensor with the following properties:

PSI - ohm/V
00.0 0.5
14.5 0.9
29.0 1.3
43.5 1.7
58.0 2.1
72.5 2.5
87.0 2.9
101.5 3.3
116.0 3.7
130.5 4.1
145.0 4.5

Given the above linear pressure to voltage curve, what should I use for a formula?

Also, How do I wire it up? it is a 2-wire sensor, should I power one wire with the DLP-IO8's 5v supply and the other wire to one of the inputs?

Thanks,
John-

 

two-wire sensor is likely not going to work. what brand/model sensor? i imagine it came with a gauge.

 

After crawling under my car and looking, it is indeed a 3-wire sensor. The above voltage to pressure chart is from a 0-150psi Glowshift GS-ET04 Oil Pressure gauge.

I also have a 3-wire 0-100psi 4590-0023-12 sensor from a 3363 Autometer Fuel Pressure gauge.

After looking at the DLP-IO8 docs found here: http://www.dlpdesign.com/usb/dlp-io8-ds-v15.pdf I'm guessing the physical wiring of the pressure sensor is similiar to the Temperature sensor wiring example, minus the pull-up resister ?

I also am coming up blank as to how I would modify the Eval="x" entry in the data.xml file to support the characteristics of the sensor.

Thanks,
John-

 

For the data you have listed above, if the sensor measures gauge pressure, then the Eval formula in EvoScan would be:

Eval="0.1768x-18.125"

If it measures absolute pressure, then the formula would be:

Eval="0.1768x-32.625"

It looks like a pullup resistor is required. Seems to mildy complicate an otherwise very simple wiring process. BTW, cat5 cable has eight conductors vs only three that are needed. Kinda strange to recommend it. Lots of shielded wiring out there that can be used.

 

Thank You Sir! - How did you come up with the above formulas?

John-

 

does anyone use this to log AFR? the AEM Failsafe wideband only have analog output..so i need this to log my AFR with evoscan...help