Calibrating Remotec Thermostat

Other Devices & Integrations Climate Control & Temperature Sensors
1

Hello,

I recently purchased the VeraLite package that comes with the Remotec ZTS-110 thermostat. I had no problems adding everything to the controller, and am well on my way to home automation addiction. The problem is that the Tstat seems to show a temperature that is about 2 degrees too high. The Remotec instructions show that you can modify parameter 13 to hex value “FE” and that will adjust the calibration; cool! So I struggled around with figuring our how to modify parameters and thought that I did it correctly, but nothing on the thermostat changed at all. I wrote to Vera support, and they indicate that I did modify parameter 13 successfully… Still, no detectable change in either the display or the function of the thermostat. Can anyone else confirm that the Remotec ZTS-110 supports calibration?

2

How do you know it is 2 degrees high? I have one of these from the kit lying on a shelf somewhere. Had some issues and ended up buying a Honeywell Wifi.

Sent from my iPad using Tapatalk

3

[quote=“jroberts, post:1, topic:187481”]Hello,

I recently purchased the VeraLite package that comes with the Remotec ZTS-110 thermostat. I had no problems adding everything to the controller, and am well on my way to home automation addiction. The problem is that the Tstat seems to show a temperature that is about 2 degrees too high. The Remotec instructions show that you can modify parameter 13 to hex value “FE” and that will adjust the calibration; cool! So I struggled around with figuring our how to modify parameters and thought that I did it correctly, but nothing on the thermostat changed at all. I wrote to Vera support, and they indicate that I did modify parameter 13 successfully… Still, no detectable change in either the display or the function of the thermostat. Can anyone else confirm that the Remotec ZTS-110 supports calibration?[/quote]

what is the ZTS-110 version on your hand? is it the latest 3.14?

4

I’ve tested this Remotec ZXT-120 against numerous temperature devices, and its always 2 degrees C higher than anything else.

The “temperature compensation” values are in the manual
to lower the readout by 2 degrees C the Device Options setting that needs to be added is:

37 1 byte hex FE (lowers by 2C) Use this if your remotec ZXT-120 gives a reading that is 2C too high.

Formula: Display temperature = sensor reading value + offset value (unit = degree C) 0x00 = 0 o C (Default) 0x01 = 1 o C 0x02 = 2 o C 0x03 = 3o C 0x04 = 4 o C 0x05 = 5 o C 0xFF = ‐1o C 0xFE = ‐2o C 0xFD = ‐3o C 0xFC = ‐4 o C 0xFB = ‐5o C

This didn’t seem to work on UI5, but did on UI7.