W1209 Temperature controller Casing LED:
This is W1209 Temperature controller incredibly low cost temperature controller. This w1209 temperature controller monitor is a highly functional thermostat handler. Although this W1209 Temperature controller module has an embedded microcontroller no programming knowledge is required.
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Specification of W1209 Temperature controller Casing LED:
Temperature Control Range: -50 ~ 110 C
Resolution at -9.9 to 99.9: 0.1 C
Resolution at all other temperatures: 1 C
Measurement Accuracy: 0.1 C
Control Accuracy: 0.1 C
Refresh Rate: 0.5 Seconds
Input Power (DC): 12V
Measuring Inputs: NTC (10K 0.5%)
Waterproof Sensor: 0.5M
Output: 1 Channel Relay Output, Capacity: 10A
Static Current: <=35mA
Temperature: -10 ~ 60 C
48mm x 40mm x 14mm
Long press the button to activate the menu.
Code Description Range Default Value of W1209 Temperature controller LED:
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 thermostat will display the current temperature in oC by default. When in any other mode making no input for approximately 5 seconds will cause the thermostat to return to this default display.
Setting the trigger temperature W1209 Temperature controller LED:
To set the trigger temperature press the button marked ‘SET’. The seven segment display will flash. You can now set a trigger temperature (in oC) using the ‘+’ and ‘-‘ buttons in 0.1 degree increments. If no buttons are pressed for approximately 2 seconds the trigger temperature will be stored and the display will return back to the current temperature. e578443#
Setting the parameters:
To set any parameter first long press the ‘SET’ button for at least 5 seconds. The seven segment display should now display ‘P0’. This represents parameter P0. Pressing the ‘+’ or ‘-‘ buttons will cycle though the various parameters (P0 to P6). Pressing the ‘SET’ button whilst any of there parameters are displayed will allow you to change the value for that parameter using the ‘+’ and ‘-‘ buttons (see below). When finished setting a parameter press the set button to exit that option. If no buttons are pressed for approximately 5 seconds the thermostat will exit the parameter options and will return back to the default temperature display.
Setting the cooling or heating parameter P0:
The parameter P0 has two settings, C and H. When set to C (cooling) the controller will turn on the cooling system to drive the temperature down to the trigger temperature. Once at this temperature the controller will turn off the cooling. When the temperature drifts back to the set point + hysteresis (see parameter P2) the controller will turn the cooling system back on.
When set to H (heating) the controller will turn on a heater to drive the temperature up to the trigger temperature. Once at this temperature the controller will turn the heating off. When the temperature drops back down to the setpoint – hysteresis (see parameter P2) the controller will turn the heating system back on.
Setting the hysteresis parameter P1:
This sets how much change in temperature must occur before the relay will turn back on after reaching the trigger temperature. For example, when in heating mode, if set to the default 2oC and the trigger temperature has been set to 25oC, it will not re-energise the relay until the temperature falls back below below 23oC (25oC – 2oC). Setting this hysteresis helps stop the controller from continually triggering when the temperature drifts around the trip temperature.
Setting the upper limit of the thermostat parameter P2:
This parameter limits the maximum trigger temperature that can be set. It can be used as a safety to stop an excessively high trigger temperature from accidentally being set by the user.
Setting the lower limit of the thermostat parameter P3:
This parameter limits the minimum trigger temperature that can be set. It can be used as a safety to stop an excessively low trigger temperature from accidentally being set by the user.
Setting temperature offset correction parameter P4:
Should you find there is a difference between the displayed temperature and the actual temperature (for instance if the temperature probe is on a long run of cable) you can make minor corrections to the temperature reading with this parameter.
Setting the trigger delay parameter P5:
This parameter allows for delaying switching of the relay when the trigger temperature has be reached. The parameter can be set in one minute increments up to a maximum of 10 minutes.
Setting the high temperature alarm parameter P6:
Setting a value for this parameter will cause the relay to switch off when the the temperature reaches this setting. The seven segment display will also show ‘—‘ to indicate an alarm condition. The relay will not re-energise until the temperature falls below this value. The default setting is OFF.
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