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ELECTRIC HEATING CONSTANT TEMPERATURE
INCUBATOR
MODEL:303-00BE
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Model: 303-00BE
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ELECTRIC HEATING
CONSTANT TEMPERATURE
INCUBATOR
2
Thank you for your purchase of the Electric Heating Constant T
emperature Incubator.
This operation manual describes daily operation parameters in
detail.
Precautions for safe operation are recorded regarding the important
contents of safe use; please be sure to follow them to ensure the
smooth completion of the test.
Product Features:
1. The shell is made of high-quality cold-rolled steel plate with a surface
electrostatic spraying finish.
2. The inner chamber is made of stainless steel.
3. The intelligent digital display PID temperature controller features functions
such as timing, over-temperature alarm, temperature deviation correction, and
control temperature self-tuning.
4. The large double-layer toughened glass window allows for convenient
observation of the contents inside.
5. The new synthetic silicone seal is aesthetically pleasing and can withstand
high temperatures for extended periods.
6. The hot air circulation system uses a double air duct circulation design with a
high-temperature resistant and low-noise fan, ensuring longer fan life and more
uniform temperature distribution inside the chamber.
7. The device is equipped with an independent fan switch that can be turned on
or off as needed.
8. The device is equipped with an independent fan switch that can be turned on
or off as needed.
Precautions for safe operation
(1) For the safety of the experiment, please install an external grounding device
and choose a power leakage protection device that matches the equipment.
(2) The device is strictly prohibited from being used in experiments involving
flammable, explosive, highly toxic, or corrosive substances.
(3) Place the device on a dry platform or ground, maintaining a distance of more
3
than 50 cm from the wall.
(4) According to the need, place the experimental items on the tray, turn on the
power, turn on the switch, and set the required temperature according to the
intelligent instrument operation instructions.
(5) Turn off the power when the equipment is not in use and keep it dry and clean.
(6) Please read the operation manual carefully before use.
Technical Parameters:
Model
303-00BE
Voltage
AC120V 60HZ
Tem.fluctuation
±0.5℃
Power
235W
Inner chamber size mm
（D×W×H）
260 x 280x 270mm
Tem.range
RT+5-70℃
Working environment
Temperature 5-40℃
Relative humidity
＜90％
4
Panel Instructions
(1) Number of program segments: display the number of segments when in program
mode;
(2) reservation time indicator: on when the appointment is turned on;
(3) time: program segment time or fixed value timing time;
(4) key lock;
(5) rise Tips for cooling down;
(6) Measure temperature in degrees Celsius;
(7) Fahrenheit symbol;
(8) Set temperature;
(9) Shutdown indicator: Standby lights up for standby;
(10) Running indicator;
(11) Heating indicator: Lights when heating is started;
(12) Cooling indicator (standby);
(13) Fault indicator: flashes when a fault occurs;
(14) High-speed fan symbol: Lights when high-speed fan starts;
(15) Medium-speed fan symbol: medium Lights up when the speed fan starts;
(16) Symbol for low speed fan: lights when the low speed fan starts.
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Operation and using
(1) When the controller is switched on, display windows show “In index ( P, C,
K, S )"” and the value of temperature range for 3 seconds, then it starts
running.
(2) Temperature and time settings:
Press the “Set” button, the controller runs into the temperature setting state.
Re-press the “Set” button, the controller runs into the time setting state. In
setting state, you can use the “◄” , ”▼” and ”▲” buttons to get the required
settings. Press the “set” button again, it returns from the setting state and the
settings are saved automatically.
If the time is set as “0”, the controller will run continuously, the display window
of “SV” will display the set point temperature. If the time set value is not equal
“0”, timers start time when the measuring temperature reaches the set point
temperature, the display window of “SV” will display the runtime.
(3) When temperature alarm, the buzzer will sound,"
(4) When the buzzer sounds, it can be muted by pressing any button.
(5) “◄” button: In the setting state, it can shift the set value by pressing the
button.
(6) “▼” button: In the setting state, it can reduce the set value by pressing
the button. If press and hold the button, the set value will reduce continuously.
(7) ”▲” button: In the setting status, it can increase the set value by pressing
the button. If press and hold the button, the set value will increase
continuously.
(8) In setting state, the controller will return to run status if without any key
press in one minute.
(9) If the display window shows “----“, it indicates the fault of temperature.
．Internal parameters settings
Press the “Set” button for 3 seconds, and the controller will display the
password prompt “Lc.” Adjust the password to the required value, then press
the “Set” button again to enter the internal parameter setting state. If you press
the “Set” button for another 3 seconds, it will return to the running state.
6
Prompt
Name
Setting
range
Instruction
initial value
Ot
Book boot
0-9999m
Not 0, the arrival time starts to run
0
Pb
null adjustment
(intercept)
-100～
999
-100.0～
999.9
Adjust this value when the controller's
zero position error is large and the full
scale error is small. Generally, Pt100
adjusts this value scarcely.
0
PK
Full-scale
adjustment
(gradient)
-1000～
2000
Adjust this value when the controller's
zero position error is large and the full
scale error is small. PK=4000×(reading
value of mercury thermometer-current
measured temperature )/current
measured temperature. Generally, Pt100
adjusts this value firstly.
0
rH
URV setting
0～400℃
0.0～
400.0
Adjust rH to make the measuring range
0～rH(℃)。
600
AL
Alarm setting
0～full
scale
0.0～full
scale
When the temperature exceeds the
SP+AL value, the alarm light is on and
alarm outputs.
5
P
Proportional
band
0～full
scale
0.0～full
scale
Proportional action regulation.The larger
the P is, the smaller the proportional
action is and the lower the system gain is.
P=0 refers to a bit control, the dead band
is 0.4.
25
I
Integral time
（Reset
time）
10～3600
秒
integral-action time constant, the larger I
is, the weaker the integral action is
200
7
d
Differential
time（Preset
time）
0～3600
秒
differential action time constant, the
larger I is, the stronger the differential
action is, it can also overcome the
overshooting.
200
Ar
Overshoot
suppression
0～200%
The smaller the XF is, the stronger ability
of the controller to control the
temperature overshoot
85
T
Heating
cycle
1～100 秒
Relay output≮20s,SSR and SCS≮2s,
only on heating side
3
dp
Decimal
point setting
0；1
DP=0 displays a resolution for 1℃; DP=1
displays a resolution for 0.1℃，
1
CE
timing unit
0-1
0 takes a timing unit of minute, and 1
takes a timing unit of hour.
0
Ct
Refrigeratio
n control
delay
0～3600
秒
The time required for two adjacent
compressor starts, Ct=0 means to cancel
the compressor function.
0
CH
upper bias
setting of
refrigeration
control
0～full
scale
0.0～full
scale
When the temperature exceeds the CH
value and conforms to the refrigeration
control delay of the compressor, the
refrigerating lamp lights on and
refrigeration contact connects, the
compressor starts, namely SP+CH 〉
setting value
0.5
CL
Lower bias
setting of
refrigeration
control
0～full
scale
0.0～full
scale
When the compressor starts, the
refrigeration contact disconnects while
the measured temperature≤setting
temperature +CH-CL value, the
compressor stops.
0.3
8
drt
Open door
test
0-full
range;
scale
span
When the temperature drops and the
deviation exceeds the deviation, the
meter judges that the door has been
opened
1.0
