Difference between revisions of "HIP:Temperature Sensors"
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(→RTP - Ruggedized Wide Range Temperature Probe) |
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* [[http://embeddeddatasystems.com/page/EDS/PROD/SENSORS/RTP Link]] | * [[http://embeddeddatasystems.com/page/EDS/PROD/SENSORS/RTP Link]] | ||
* [[http://talk1wire.com/?q=system/files&file=RTP.pdf Specification Sheet]] | * [[http://talk1wire.com/?q=system/files&file=RTP.pdf Specification Sheet]] | ||
| + | === Troubleshooting === | ||
| + | * The 85C response is an error indication from the sensor that means that the temperature conversion was not properly finished. This is usually due to the +5v pin on a DS18S20 not being tied to GND (which puts the sensor into parasite power mode). The other 2 cases are if it doesn't get enough power during the conversion, either due to a under-powered serial port or not enough time to finish the conversion. In digitemp you can extend the conversion time by passing -r 2000 to wait 2 seconds instead of the default 1 second. [[http://lists.brianlane.com/pipermail/dt-general/2005-June/000175.html Link]] | ||
| + | ** Raising digitemp's read delay (-r) to 3000ms fixed the 180F error for me (copelco). | ||
Latest revision as of 11:45, 2 September 2006
RTP - Ruggedized Wide Range Temperature Probe
- DS18S20 or a DS18B20 1-Wire temperature sensor
- [Link]
- [Specification Sheet]
Troubleshooting
- The 85C response is an error indication from the sensor that means that the temperature conversion was not properly finished. This is usually due to the +5v pin on a DS18S20 not being tied to GND (which puts the sensor into parasite power mode). The other 2 cases are if it doesn't get enough power during the conversion, either due to a under-powered serial port or not enough time to finish the conversion. In digitemp you can extend the conversion time by passing -r 2000 to wait 2 seconds instead of the default 1 second. [Link]
- Raising digitemp's read delay (-r) to 3000ms fixed the 180F error for me (copelco).
