single wire temp sensor returned values
Posted: Sun Nov 29, 2015 11:13 pm
Details on what I have:
Second Generation DL-1. 2 single wire (Autometer) temp sending units, 1000ohm pull down resistor (one for each sensor), 5V reference from the DL-1.
Returned values that are getting logged and displayed on a DASH 3 are in the 35 to 10 volt range. The logged voltage falls as the temp goes up as it should, but I never measured it below about 10V. The sensor is being supplied 5V, verified with a meter.
If the sensors are being supplied 5V (verified), how is it that the DL-1 is logging more than 5V?
The system used to work, then during the last race I was getting weird numbers returned so I created a gig outside of the car, used two new sensors and verified what is being logged and displayed with a meter.
Thanks
Matt
Second Generation DL-1. 2 single wire (Autometer) temp sending units, 1000ohm pull down resistor (one for each sensor), 5V reference from the DL-1.
Returned values that are getting logged and displayed on a DASH 3 are in the 35 to 10 volt range. The logged voltage falls as the temp goes up as it should, but I never measured it below about 10V. The sensor is being supplied 5V, verified with a meter.
If the sensors are being supplied 5V (verified), how is it that the DL-1 is logging more than 5V?
The system used to work, then during the last race I was getting weird numbers returned so I created a gig outside of the car, used two new sensors and verified what is being logged and displayed with a meter.
Thanks
Matt