W1209 DC 12V Heat Cool Digital Thermostat Temperature Controller Miniature Thermostat Temperature Control Switch Panel Specifications: Temperature range :-50 to 110 Dimensions: 48.5 x 40mm Temperature control mode: ON / OFF Resolution:When temperature is 0.1, the resolution is -9.9~99.9, other temperature segment is 1 Control accuracy: 0.1 Hysteresis accuracy: 0.1 Refresh rate: 0.5S High temperature protection: 0-110 Supply voltage: DC 12V Static current: 35mA, attract current 65mA Output voltage: DC 12V Output power: 20A relay Measurement input: (10K 0.5%) Waterproof Sensor Environmental requirements: -10 ~ 60 C ,Humidity 20% -85% Settings Chart Long press the SET button to activate the menu. Description Range Default Value P0 Heat C/H C P1 Backlash Set 0.1-15 2 P2 Upper Limit 110 110 P3 Lower Limit -50 -50 P4 Correction -7.0 ~ 7.0 0 P5 Delay Start Time 0-10 mins 0 P6 High Temperature Alarm 0-110 OFF Long pressing +- will reset all values to their default Displaying the current temperature: The_x000D_ thermostat will display the current temperature in C by default. When _x000D_ in any other mode making no input for approximately 5 seconds will cause_x000D_ the thermostat to return to this default display. Setting the trigger temperature: To_x000D_ set the trigger temperature press the button marked 'SET'. The seven _x000D_ segment display will flash. You can now set a trigger temperature (in _x000D_ C) using the '+' and '-' buttons in 0.1 degree increments. If no _x000D_ buttons are pressed for approximately 2 seconds the trigger temperature _x000D_ will be stored and the display will return back to the current _x000D_ temperature. Setting the parameters: To set any parameter long press the 'SET' button for at least 5 seconds. The seven _x000D_ segment display should now display 'P0'. This represents parameter P0. _x000D_ Pressing the '+' or '-' buttons will cycle though the various parameters_x000D_ (P0 to P6). Pressing the 'SET' button whilst any of there parameters _x000D_ are displayed will allow you to change the value for that parameter _x000D_ using the '+' and '-' buttons (see below). When finished setting a _x000D_ parameter press the set button to exit that option. If no buttons are _x000D_ pressed for approximately 5 seconds the thermostat will exit the _x000D_ parameter options and will return back to the default temperature _x000D_ display. Setting the cooling or heating parameter P0: The _x000D_ parameter P0 has two settings, C and H. When set to C (default) the _x000D_ relay will energise when the temperature is reached. Use this setting if_x000D_ connecting to an air-conditioning . When set to H the relay will _x000D_ de-energise when the temperature is reached. Use this setting if _x000D_ controlling a heating device. Setting the hysteresis parameter P1: This_x000D_ sets how much change in temperature must occur before the relay will _x000D_ change state. For example if set to the default 2C and the the trigger _x000D_ temperature has been set to 25C, it will not deenergise until the _x000D_ temperature falls back below below 23C. Setting this hysteresis helps _x000D_ stop the thermostat from continually triggering when the temperature _x000D_ drifts around the trip temperature. Setting the upper limit of the thermostat parameter P2: This_x000D_ parameter limits the maximum trigger temperature that can be set. It _x000D_ can be used as a safety to stop an excessively high trigger temperature _x000D_ from accidentally being set by the user. Setting the lower limit of the thermostat parameter P3: This_x000D_ parameter limits the minimum trigger temperature that can be set. It _x000D_ can be used as a safety to stop an excessively low trigger temperature _x000D_ from accidentally being set by the user. Setting temperature offset correction parameter P4: Should_x000D_ you find there is a difference between the displayed temperature and _x000D_ the actual temperature (for instance if the temperature probe is on a _x000D_ long run of cable) you can make corrections to the temperature _x000D_ reading with this parameter. Setting the trigger delay parameter P5: This_x000D_ parameter allows for delaying switching of the relay when the trigger _x000D_ temperature has be reached. The parameter can be set in minute _x000D_ increments up to a maximum of 10 minutes. Setting the high _x000D_ temperature alarm parameter P6: Setting a value for this parameter will _x000D_ cause the relay to switch off when the the temperature reaches this _x000D_ setting. The seven segment display will also show '---' to indicate an _x000D_ alarm condition. The relay will not re-energise until the temperature _x000D_ falls below this value. Th