W1209 Digital Thermostat Temperature Control Switch DC 12V Sensor Module

W1209 is a small high precision -50°C to 110°C heating and cooling thermostat. It is a digital temperature controller using 12v DC power supply and NTC temperature probe.
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RM32.00

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Details
Details
  • Temperature control range: -50 ~ 110°C
  • Input Power: DC 12V
  • Resolution: -9.9-99.9°C: 0.1 °C (or 1 °C in other temperature range)
  • Sensor Cable: NTC (10K 0.5%) Waterproof sensor 0.5M
  • Measurement accuracy: 0.1 °C
  • Output range: 1 channel 10A relay
  • Control accuracy: 0.1 °C
  • Environmental requirements: -10-60 °C, humidity 20% -85%
  • Hysteresis accuracy: 0.1 °C
  • Backlash setting: 0.1 -15°c 
  • Refresh rate: 0.5s
  • Power consumption: Static current: <= 35MA,attract current: <= 65MA
  • Temperature protection: 0-110 °C
  • Display Type: 0.28 "three digital display tube
  • Size: 48.5 * 40mm

 

Setting Method

  • Connect the power supply provided and the load through the relay connections marked K0 and K1
  • The present temperature at the probe is displayed.
  • Press the SET button; the display flashes the trip temperature.
  • Press + or - to set the desired trip temperature.
  • Press SET to confirm your temperature setting
  • The controller automatically changes the relay setting to off if the trip temperature is below the present temperature with Hysteresis
  • When the relay is off (open circuit) the LED indicator will be off
  • If the seven segment LED display Shows:
    "LL" the temperature sensor leads are open circuit.
    "HH" the probe detects a temperature out of its range.
  • When out of range the thermostat will be forced to close the relay and it will display "---" high temperature protection.

Parameter Settings

  • To alter the thermostats parameters press and hold SET for about 5 seconds
  • The display will initially flash showing the trip temperature and will eventually change to P0 press the + and - to toggle between P0 to P8
  • To alter the selected parameter press SET and use the + or - to alter the settings for that parameter.
  • When you have finished changing the parameter press SET once and WAIT for the display to return to normal
  • On the next page is a list of the Parameters and their settings.

 

Function

  • P0 
    • Sets the parameter to either Cooling or Heating "C" or "H"
    • This parameter changes the relays output from Closed when trip temperature is reached or to Open when the trip temperature is reached
    • Factory setting is "C" Cooling (Closed when temperature reached)
    • Example: The relay Closes when the detected temperature reaches or exceeds the set temperature so switches on air conditioner. "H" is the opposite way round the relay opens when the temperature reaches the set temperature thereby switching off the Heating.
  • P1
    • Sets the parameter Hysteresis, The hysteresis is the difference temperature between the trip on and trip off settings. If the trip on and trip off settings were set to the same value the thermostat would be changing state constantly. By adding a 0.5°C Hysteresis the trip will take place only when a change of 0.5°C difference has been detected.
    • Example: A 1°C hysteresis makes the relay remain unchanged until a 1°C temperature change has taken place. Like wise a hysteresis of 10°C makes the relay remain unchanged until a 10°C temperature change has taken place. This function prevents the heating or cooling device from constantly switching on and off with micro temperature changes.
    • Factory setting: 2°C
  • P2
    • Sets the upper limit of the thermostats temperature working range
    • This parameter is good for setting a limited range of temperature swing
    • The upper limit once reached triggers the "High Temperature Alarm"
    • Example: Heating a tropical fish tank, you want to see accuracy to within .1°C within a possible 3°C swing
    • Factory setting +110°C 
  • P3
    • Sets the lower limit of the thermostats temperature working range
    • This parameter is good for setting a limited range of temperature swing
    • The upper limit once reached triggers the "High Temperature Alarm"
    • Example: Heating a tropical fish tank, you want to see accuracy to within .1°C within a possible 3°C swing
    • Factory setting: -50°C 
  • P4
    • Sets a temperature offset figure
    • This parameter is used when the sensor has a long cable and the extra cable affects the true reading at the probe. Or if you wish to deliberately introduce an offset temperature figure.
    • Example: By setting this parameter to +1.5°C the working temperature displayed will be increased by +1.5°C above the actual detected temperature.
    • Factory setting: 0
  • P5
    • o   Set a power on delay in functionality from 1 to 10 minutes
    • o   This parameter sets a delay in the thermostats functioning for 1 to 10 minutes on power up
    • o   The reason you might need a delay is the cooling device may need to run for one minute before it can be used Or the heating function likewise may need time to run up before being used.
    • o   This delay figure is the delay in minutes after power up before its functioning
    • o   Example:  if you set this to "1" the relay will not operate after powering up until after one minute even if the trigger point has been reached.
  • P6
    • The options sets the high temperature alarm
    • Setting this option to "ON" will force the thermostat to a relay off state and display "---"
    • But only when the temperature reaches the value set in the P6 parameter.
    • The thermostat will reset to normal operation when the temperature reduces below the P6 parameter
    • When the thermostat resets it resets to the programmed state so if the relay should be on when it resets it will turn on.
    • Example: By setting this parameter it allows for a high temperature indication and protection in P0 "H" mode. It allows the setting of an absolute maximum temperature permissible by forcibly disconnecting the relay in the P0 "H" mode.
    • Factory setting: "OFF"
  • To restore factory settings press and hold the + and - together for 10 seconds.

 

Long press SET (5 seconds) to enter the main menu setting

Code

Code description

Setting range

Factory setting

P0

Cooling/Heating

C/H

C

P1

Hysteresis setting

0.5-15

2

P2

Highest temperature

110°C

110°C

P3

Lowest temperature

-50°C

-50°C

P4

Temperature correction

-7-7°C

0°C

P5

Delay start time

0-10 minutes

0

P6

High temperature alarm

0-110 °C

OFF

Long press +- to restore the factory setting(In Shutdown Mode)

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