Waketech Posted January 12, 2015 Share Posted January 12, 2015 All, Just wondering if anyone has used the AEOTEC mutlti-sensor or Everspring Sensor and converted it to an external sensor (ie: for a hot tub). I am not too sure what the actual sensor is inside and how it connects but I assume it is an RTD, thermocouple type which should be easily adaptable provided one could get the spec's for it ??? Link to comment
Xathros Posted January 12, 2015 Share Posted January 12, 2015 I haven't opened up my Everspring unit but I suspect it's using something like the Dallas one wire sensors (DS1822) or similar. If it is, there are a number of nicely packaged external probes that could be used in place of the internal sensor. -Xathros Link to comment
Nestor Posted January 14, 2015 Share Posted January 14, 2015 Since you are considering the AEOTEC, which is Zwave, I suggest mating an industrial thermocouple temperature sensor to a Mimolite. Hot tub temps may be out of range of the devices you mentioned. Link to comment
Waketech Posted January 14, 2015 Author Share Posted January 14, 2015 Nestor, I looked although it briefly at the Mimolite manual and don't see/understand how the connection would be made between the two, if you have a moment could you please help me out on this Link to comment
Nestor Posted January 14, 2015 Share Posted January 14, 2015 Nestor, I looked although it briefly at the Mimolite manual and don't see/understand how the connection would be made between the two, if you have a moment could you please help me out on thisAdmittedly, I haven't dug really hard into this, but from what I can see, the Mimolite can read a voltage and return a value via Zwave. I mentioned thermocouples as they are generally cheaper than a Resistance Thermal Device. Something like the following http://www.farnell.com/datasheets/1734312.pdf will return a standard 4- 20 mA signal, which can be easily converted to a voltage with a precision resistor and read by the Mimiolite. Hope this makes sense so far. Link to comment
Waketech Posted January 14, 2015 Author Share Posted January 14, 2015 Got ya, I was hung up on trying to see how a thermocouple would direct connect to the mimolite, blond moment. Thanks for the response Link to comment
Xathros Posted January 14, 2015 Share Posted January 14, 2015 All, Just wondering if anyone has used the AEOTEC mutlti-sensor or Everspring Sensor and converted it to an external sensor (ie: for a hot tub). I am not too sure what the actual sensor is inside and how it connects but I assume it is an RTD, thermocouple type which should be easily adaptable provided one could get the spec's for it ??? I opened up my Everspring unit and it appears to use a thermistor for temp sensing. The thermistor is nestled together with the humidity sensing grid and may be somewhat difficult to remove and replace with leads to and external sensor. If done, you would likely need to recalibrate the unit to account for the added resistance of the leads to the external probe. The sensors fit tightly into a molded area of the front case that is vented to the outside and fairly well sealed from the inside when the sensors are in place. -Xathros Link to comment
Waketech Posted January 14, 2015 Author Share Posted January 14, 2015 I opened up my Everspring unit and it appears to use a thermistor for temp sensing. The thermistor is nestled together with the humidity sensing grid and may be somewhat difficult to remove and replace with leads to and external sensor. If done, you would likely need to recalibrate the unit to account for the added resistance of the leads to the external probe. Everspring.jpg The sensors fit tightly into a molded area of the front case that is vented to the outside and fairly well sealed from the inside when the sensors are in place. -Xathros Well at least it's not wave soldered, good old bulky solder. I assume the recalibration is part of/can be done through the everspring ? Link to comment
Xathros Posted January 15, 2015 Share Posted January 15, 2015 Well at least it's not wave soldered, good old bulky solder. I assume the recalibration is part of/can be done through the everspring ? I'll have to dig out the docs that came with it. I vaguely remember a way to adjust the unit but can't say for sure. At worst, you could just deal with the reading being off and adjust for it at the ISY. -Xathros Link to comment
Waketech Posted January 15, 2015 Author Share Posted January 15, 2015 How would I adjust in the ISY, sorry my programming is basic and do not have much knowledge on anything other than IF, Then, Else's. Link to comment
Xathros Posted January 15, 2015 Share Posted January 15, 2015 How would I adjust in the ISY, sorry my programming is basic and do not have much knowledge on anything other than IF, Then, Else's. Lets say that after modifying the unit with an external probe and testing against a known accurate thermometer, the unit is reading 3 deg above actual. (ie: 80 deg actual reads as 83 deg on the multi sensor) Lets say we want to keep the temp between 80 and 85: If Status 'ZWave MultiSensor' < 83° F Then Set 'Heater' On Else - No Actions - (To add one, press 'Action') and If Status 'ZWave MultiSensor' > 88° F Then Set 'Heater' Off Else - No Actions - (To add one, press 'Action') So - simply move your decision points up by 3 degrees. Make sense? -Xathros Link to comment
Waketech Posted January 16, 2015 Author Share Posted January 16, 2015 Ok got it, i assumed you meant some way to offset the temp inside the isy (apply math to the raw value) Link to comment
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