I have the ETC-200 set at low temp 14c., high temp 15c. controlling the tubular heater. The DHC-100 controls the fridge compressor, and is set 80% RH, with a 5% offset. Meaning it turns the compressor on at 85%. turns off at 80%. The RH actually goes down to about 76% after the compressor turns off. The "fridge" is acting as a de-humidifier, because of the condensate channel and run-off. Its working perfectly!! I've set RH fairly high to start with, to avoid case hardening, will probably drop it to 75% in about a weeks time.
I know this set-up is only going to work in the winter, when the ambient temperature is lower than the cabinet temperature, ie. below about 12-13 degrees. In the summer months I'll have to use the "fridge" for temperature control, and maybe get a small de-humidifier.
My cabinet is fairly small, I'm on the lookout for a larger larder fridge, with same type of channel de-frost arrangement.
Tubular heater in the bottom of the cabinet, temperature and humidity sensors are top right.
Channel with exit hole for condensate to run into a plastic tray, the tray is above the compressor motor, and heat from the motor evaporates the water. You can clearly see droplets of water on the back wall, at the top.
I put the humidity and temperature controller in an IP66 box, which I purchased from my local electrical wholesaler. Box and two 13 amp outlets cost £10.50.
