Operating manual for digital temperature controller XH-W1208
Product information
This temperature controller adopts advanced micro electronic technique—LED digital display, drawing
the advantages and experience of Monocrystalline temperature controller at home and abroad, providing
optimal solutions under precondition of meeting customers’ needs. Simple and practical as it is, it is
economical product with high cost performance. Being a mini type with integrated intelligent control and
able to set delay return difference, it is especially applicable to various situations of refrigerating, freezing
and heating.
Technical parameters
Range of temperature control: -50~110℃
Resolution: range of -9.9~99.9 is 0.1℃, other temperature range is 1℃
Temperature measurement accuracy: ±1℃
Refresh rate: 0.5S
Input power: DC12V (optional)
Measurement input: NTC（10K 0.5%） waterproof sensor
Output: circuit 1 relay output, maximum capacity 10A
Environmental requirements: -10~60℃humidity 20%-85%
Dimensions: 75*35*85mm
Mounting open hole: 71*29
Overall power consumption: ≤2W
Application method
The output of this temperature controller is 10A relay, which meets various high power loads. Connect
control circuit to supply electricity for temperature controller, and it shows the ambient temperature on the
display screen. Press SET button once, the temperature on the display screen will blink. Press ＋ to turn
up temperature and － to turn down temperature( long press on ＋－ for quick turn up or down). Press
SET to get back after finished settings, and the relay will power on/off automatically pressing setting on
controller now. With long press on SET for 3 seconds, the controller will get startup or shutdown under
normal display condition.
Statements of Indicator light, nixie tube and buzzer
Indicator light: blink indicates start-up delay of refrigerating and heating, normally on indicates the relay is
closed.
Nixie tube: show LLL indicates open circuit of the sensor, connect the sensor in line with the instructions;
show HHH indicates in excess of range of the measurement of temperature controller, the relay will be
forced to disconnect.
Parameter function specification
Long press on SET for 5 seconds to enter into main menu settings, press ＋－ to switch from P0 to P6
and press SET to get back
P0 cooling, heating mode
Long press on SET for 5 seconds to show P0, press SET once to set working mode, press ＋－ to
switch (H is for heating mode) (C is for cooling mode), press SET once to get back, long press on SET or
no press-button movement for 10 seconds, the controller will confirm and complete automatically
Cooling mode: when measuring temperature value≥setting temperature value, cooling relay operates,
cooler turns on; when measuring temperature value≤setting temperature value-return difference, cooling
relay operates, cooler turns off
Heating mode: when measuring temperature value≤setting temperature value, heating relay operates,
heater turns on; when measuring temperature value≥setting temperature value+ return difference,
heating relay operates, heater turns on
P1 Return difference settings
Long press on SET for 5 seconds to display P0, press ＋－ to switch to P1, press SET once to set return
difference value, press ＋－ to set return difference from 1 to 15, press SET once to get back after
finished, long press on SET or no press-button movement for 10 seconds, the controller will confirm and
complete automatically
Cooling mode: when measuring temperature value≥setting value, relay operates, cooler turns on; when
measuring temperature value≤setting value-return difference value, relay operates, cooler turns off.
For example, ambient temperature is 30℃, setting value is 25℃, set return difference at 2℃, relay operate
after powering on, cooler turn on; when cooled to 23℃, relay disconnect, cooler turn off, temperature will
begin to rise up due to the disconnection of cooler; when rising up to setting value 25℃, relay operate,
cooler turn on again; control temperature will not exceed 25℃recycling in this way.
Heating mode: when measuring temperature value≤setting value, relay operates, heater turns on; when
measuring temperature value≥setting value, relay disconnects, heater turns off.
For example, ambient temperature is 10℃, setting value is 25℃, set return difference at 2℃, relay operates
after powering on, heater turns on; when heated to 27℃, relay disconnects, heater turns off, temperature
will begin to go down due to the disconnection of heater; when going down to setting value 25℃, relay
operates, heater turns on again; control temperature will not be lower than 25℃recycling in this way.
P2 maximum temperature setting upper limit
To refrain from danger because of excess temperature caused by others’ wrong operations, the
temperature controller has a function of setting maximum upper limit, which restricts the setting range of
maximum temperature setting point of temperature controller
Long press on SET for 5 seconds to display P0, press ＋－ to switch to P2, press SET once to set
maximum upper limit, press ＋－ to set maximum setting temperature, maximum value 110, press SET
once to get back after finished, long press on SET or no press-button movement for 10 seconds, the
controller will confirm and complete automatically
For example: set temperature at 60, you can only set temperature at its maximum setting value of 60℃
Adjust the setting value of upper limit if you want to expand the maximum temperature range of setting
value.
P3 minimum temperature setting lower limit
To refrain from ice block because of low temperature caused by others’ wrong operations, the
temperature controller has a function of setting minimum lower limit, which restricts the setting range of
minimum temperature setting point of temperature controller
Long press on SET for 5 seconds to display P0, press ＋－ to switch to P3, press SET once to set
minimum lower limit, press ＋－ to set minimum setting temperature, minimum value -50, press SET
once to get back after finished, long press on SET or no press-button movement for 10 seconds, the
controller will confirm and complete automatically
For example: set temperature at 2, you can only set temperature setting value at minimum 2℃ Adjust
the setting value of lower limit if you want to expand the minimum temperature range of setting value.
P4 temperature correction
The correction function is applicable to occasions when there are deviations between measuring
temperature and standard temperature or users have specific requirements for hardware. Temperature
after corrected=temperature before correcting + corrected value
Effective range: -7.0~7.0
Long press on SET for 5 seconds to display P0, press ＋－ to switch to P4, press SET once to correct,
press ＋－ to set correcting value, press SET once to get back after finished, long press on SET or no
press-button movement for 10 seconds, the controller will confirm and complete automatically
For example: normal temperature display is 25°C; display 25°C when temperature correction is 0; display
26.5°C when temperature correction is 1.5; display 23.5°C when temperature correction is -1.5;
P5 delay start time
unit: minute
Start delay function when the cooler or heater is in need of time delay, protecting life of the equipment
Long press on SET for 5 seconds to display P0, press ＋－ to switch to P5, press SET once to set time
unit of delay start at minute, press ＋－ to set 0-10 minutes, press SET once to get back after finished,
long press on SET or no press-button movement for 10 seconds, the controller will confirm and complete
automatically
Cooling mode: powering on for the first time, if current temperature≥setting value, cooler will not start
cooling immediately, instead it will start after running out the setting delay time
Heating mode: powering on for the first time, if current temperature≤setting value, heater will not start
heating immediately, instead it will start after running out the setting delay time
If the outage time between two contiguous starts of the cooler or heater is greater than the setting value
of start time, cooler will start immediately;
If the outage time between two contiguous starts of the cooler or heater is less than the setting value of
start time, the equipment will not restart until it runs out the setting delayed starting time of the cooler.
Delay time is calculated immediately after the cooler stops.
For example: the setting delay time under cooling condition is 5 minutes, the cooler start-up delays after
starting up, start the cooler after 5 minutes, and it will stop when reaching the desired temperature; start
timing now, operate immediately after the cooler start timing completes next time; it will not operate until
the timing is over in case of unfinished timing; the LED indicator light will blink in time delay
Setting delayed start to 0 is equal to close delay function
XH-W1208 1.8" digital temperature controller –gray(110-240V)