temperature sensor configuration

[Seb]

Hi, I understand that if you install an analogue temp sensor, when you setup the config you need to map the 0-10v inout to the temperature range of the sensor eg: If the sensor will do -30 to 70, then in the "Correction"  section you set:

Input Value 1: 0

Display Value 1: -30

Input Value 2: 10

Display Value 1: 70

However, for temp sensors such as the one built into the Air Actuator, 1-Wire Temp sensor and the Air Temp & Humidity sensor, do you need to do something similar? I see their "Display values" are 0 to 100, yet what they will sense is not, for example the Air Actuator temp sensor is 0 to 55.

Thanks, Seb

[Duncan]

ive only had to set up minor corrections on 1-wire temperature sensors and the temperature sensors built into air sockets, so i dont think you need to do anything, unless you want to calibrate against a know accurate thermometer

i calibrated mine against a 0.2 deg accurate thermometer, mostly because there was quite a difference in the temperatures where you sat in the room, and the temperature at the light switch on the wall near the door.

i also ended up fitting hidden door closers on certain rooms such as bathrooms to help keep the differential between warmer bathrooms and cooler bedrooms.

[Seb]

Thanks Duncan. What I was trying to do, and totally failed was to use a sensor in the main part of the room and compare it's values to the temperature sensor in the Air Actuator. The intention was to work out what calibration the Air Actuator Temperature sensor would need to closely mimic the real temp of the room.

However, when the actuator is open, the temp on the actuator sensor increases a lot quicker than the room sensor and it's not linear. Grrr

[Duncan]

where is the air actuator? is it on a radiator in the room?

[Deac99]

Hi Duncan,  Your comment about the hidden door closers on the bathrooms is quite interesting, I've got the same problem where I want the bathroom floor to stay warm, but I don't want the warmth in the bedroom.  Could you post a link or any info on the hardware you used for the door closer?  Thanks.

[Duncan]

there are loads of cheap copies, but the original is a Perko R2

http://www.ironmongerydirect.co.uk/products/door_closers_and_controls/concealed_fire_door_controls/367/genuine_perko_closer/378917 is an example

[seb303]

On Tuesday, January 17, 2017 at 3:34:45 PM UTC, Duncan wrote:

there are loads of cheap copies, but the original is a Perko R2

http://www.ironmongerydirect.co.uk/products/door_closers_and_controls/concealed_fire_door_controls/367/genuine_perko_closer/378917 is an example

Bear in mind that these closers will tend to slam the door, more than a conventional arm type closer.  However, if you have a fairly air-tight room and a close fitting door then the pressure should be enough to prevent a slam.

[Deac99]

Thank you Duncan & Seb!  I had not seen those before and will check one out.

[Duncan]

the perko door closers can be adjusted - ive set them on the weakest, and they pull the door closed-ish, but leave a small gap - perfect so the bathroom door is 'pulled to' but doesnt shut fully (allowing the mvhr system to work properly) and doesnt slam either (and the cats can get move the door enough to get to the cat flap !)

[Rob_in]

We were talking about other 1-Wire sensors on another thread and someone mentioned the SEDtronic Unica models. They have a page regarding setup:

http://www.sedtronic.cz/en_settings-and-use,75.html

This talks about correction to get accurate (as opposed to approximate) humidity using a formula block. I guess the point is, this seems a good example to manipulate any temperate/humidity/etc. input with any arbitrary formula you wish. Just in case you are seeing a non-linear relationship between input and desired output for instance.

https://www.loxone.com/enen/kb/formula/

HTH,

Robin

[Simon Still]

I calibrated my two loxone Analogue temp/humid and air sockets using my Braun weather station remote.  No idea of absolute accuracy but it read close enough to another one i have and was small enough to perch on top of the wall mounted Loxone units or sit on an Air socket.  Absolute accuracy doesn't matter as much as consistency across the house (you then adjust for comfort).  

Both my Loxone analogues needed significant correct - they were way off as supplied.  The Air sockets were fine but tend to be located in places that are not representative (and I'm pretty convinced their own circuitry generates enough heat to affect them when they're on). 

Duncan - Interesting that you installed door closers.  Whenever I've living anywhere with them I've removed them (once as the first job after opening the front door on moving in). With our underfloor I've just turned off the heating circuit to our bedroom which gives a small differential. In a very well insulated house (after a year I've done the sums and mine is pretty close to passive standard) it's pretty much impossible to maintain much difference in temp between rooms 

[Seb]

Hi, sorry been away for a bit.

I have an air temp sensor at head height and and air actuator. Assumption is that the air temp sensor is calibrated.

The goal is to get both the air temp sensor and air actuator to give roughly the same temp reading at all times.

The problem is that the actuator reading (when the rad is on) reads 27 degrees when the room is 20 ish. And the relationship between the two is not linear. Was hoping there maybe a stepping formula function where you can say 27=20, 26=19.75, etc...

[Duncan]

when the radiator is on, is the difference  between the actuator and room fairly constant? eg plus 7 degrees? or is the difference more variable? you could use a formula block with the temperature input and an input for when the radiator is powered up, and a suitable formula to give a reasonable approximation

[Seb]

I have been capturing the stats but unfortunately there is no linear difference, they are generally the same at 19deg but after that they are way off in each direction. Whoever at loxone thought a temp sensor in the actuator was a good idea is wrong!

Have decided to go tree with the actuators and 1-wire on the sensors.

[Quest Hardware]

Check out here:

https://www.questhardware.co.uk/search?term=Genuine+Perko+R2+Closer+-+Square+Plate+-+Satin+Chrome