ZL-7901A MicroComputer Temperature & Humidity Controller for Egg Incubators

Feature:

ZL-7901A is an industrial grade intelligent temperature and humidity controller. It can connect SSR expire output and adopt PID to control temp with high precision. It use easy touched button and big LCD display, convenient operation and easy installation. Applicable for control of incubator, climate chamber, warehouse, and so on.

Main function

1.Temperature control, three combination output, PID high precision control is chosen.
2.Humidify and dehumidify control
3.Time air exchange control
4.Time egg turning control
5.Illumination control
6.Node alarm output
7.Auto restart function
8.Temperature/humidity over limit warning and protection function
9.Temperature/humidity sensor fault warning and protection function

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Control function

On/off: Controller is off, press for 3 seconds, controller working. Controller is on, press for 3 seconds, controller off.
Temperature control
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1.Main control(R1)+Auxiliary control(R2) (T10 = 0)
a. Main temperature control work:
Measuring temperature ≤【Down limit temperature】T12, and main temperature control R1 stop time over【Main temperature control
(R1)mini stop time】T14, main control R1 working.
b Main temperature control off:
Measuring temperature ≥【Up limit temperature】T11, off main temp. Control R1.
c. Auxiliary temp. Control work:
Measuring temperature ≤【Auxiliary temp. Control(R2) start temperature】T13, and auxiliary control R2 stop time over【Auxiliary
temperature control (R2)mini stop time】T15, auxiliary control R2 working.
b Auxiliary temperature control off:
Measuring temperature ≥ 【Auxiliary temp. Control(R2) start temperature】T13 + 0.1 degree, auxiliary control R2 off.
2.External SSR temp. Control up and down limit(T10=1)
Temperature node control mode.
Measuring temperature ≤【Down limit temperature】T12, and SSR temp. Control stop time over【SSR temperature control mini stop
time】T16，SSR is on.
Measuring temperature ≥【Up limit temperature】T11, SSR is off.
3.External SSR PID temperature control(T10=2)
When external SSR main temperature control choose PID mode. Temp. Control will follow PID algorithm.
4. PID procedure:(If with PID control, it is better to tuning the PID parameters, if the default the setting is not ideal.)
a. Be sure that the equipment inside temp. has been cooled to same to environment temp.
b.Press and simultaneously for 5 seconds to enter into tuning set mode. LCD display“Pid tun”,
c.Press start external SSR, output power is locked, is on. Controller start turning PID.
d.After PID turning finished, is off.
e.When the heating temperature over 100℃, controller will end this turning, and display “Pid E03” warning with fail turning(press any
key will cancel E03)
f.If self turning dont finished in 60 minutes, controller will display“Pid E04”warning with fail turning(press any key will cancel E04)
g.Press can cancel warning E03/E04, and restart turning. During turning press can exist.
Humidity control(R3)
Humidify control(H10 = 0)
When measuring humidity ≤【Down limit humidity setting】H21, and humidity load stop time over【Min humidity load stop time】H23,
humidify is on.
When measuring humidity ≥【Up limit humidity setting】H20, humidify is off.
Dehumidify control(H10 = 1)
When measuring humidity ≥【Up limit humidity setting】H20, and humidity load stop time over【Min humidity load stop time】H23,
dehumidify is on.
When measuring humidity ≤【Down limit humidity setting】H21, dehumidify is off.
Egg-turning control(R6, R7)
Left turning time meet, R6 start, R7 is off.
Right turning time meet, R7 start, R6 is off.
Egg turning cycle times:
R6 start once+R7 start once as a cycle, when egg turning times=U14, stop turning.
Set U14=0, keep turning.
Air exchange control(R5)
Air exchange control mode:(U20=0)
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When system running time meet【Air exchange period time(R5)】U22, start air exchange relay. Air exchange time meet【Air exchange
time(R5)】U24, air exchange relay is off.
Air exchange control mode+temperature and humidity over limit protection mode(U20=1)
No temperature/humidity over limit warning, controller work at air exchange mode.
When temperature/humidity over limit warning, high temp. Or high humidity air exchange relay work. When no warning, controller
back to air exchange control mode.
Air exchange mode+temperature over limit protection mode:(U20=2)
No temperature over limit warning, work at air exchange mode.
When temperature over limit warning, high temperature air exchange relay work. When no warning, controller back to air exchange
control mode.
Air exchange mode+humidity over limit protection mode:(U20=3)
No humidity over limit warning, work at air exchange mode.
When humidity over limit warning, high humidity air exchange relay work. When no warning, controller back to air exchange control
mode.
Lighting control(R4)
Lighting control mode(U30=0): press , light on/off.
Time switch mode(U30=1):Time period(U32), R4 off. Timer time(U34), R4 is on.
Temperature and humidity over limit protection mode(U30=2):If temperature or humidity over limit warning, high temperature or high
humidity, R4 is on, when warning stop, R4 is off.
Temperature over limit protection mode(U30=3): If temperature over limit warning, high temperature, R4 is on, when warning stop, R4
is off.
Humidity over limit protection mode(U30=4): If humidity over limit warning, high humidity, R4 is on, when warning stop, R4 is off.
Warning output control(R8, R9)
Warning output mode(U40=0):
Warning node output: R8: Close when failure, open when no failure. R9 Open when failure, closed when no failure.
When temperature or humidity sensor failure, warning output is on, temperature or humidity control output off. Other outputs keep
working.
When temperature or humidity over limit, warning output start, all control outputs keep working.
Timer switch mode(U40=1): Timer period time(U42), R8 is off. Timer time(U44) R8 is on.
Temperature and humidity over limit protection mode(U40=2): temperature or humidity over limit protection, high temperature or high
humidity, R8 is on. When no alarm, R8 closed.
Temperature over limit protection(U40=3): temperature over limit protection, high temperature, R8 is on. When no alarm, R8 closed
Humidity over limit protection mode(U40=2): humidity over limit protection, high humidity, R8 is on. When no alarm, R8 closed.
Auto restart function: Power off, if power back, controller will back to work with previously setting parameters.
Incubation days cancel: keep press for 3 seconds, days will be zero.
Factory setting: controller is on, press and at the same time for 3 seconds shows『UnL』. Than press twice, controller will
restore factory setting.
Fahrenheit temperature/ degrees Celsius switching: press and for 3 seconds.
Manual system adjustment: press for 3 seconds, LCD display”CCC”press twice to enter manual adjustment. Now the LCD
codes display, all outputs stop, press and can turn R1-R7 in turns, SSR is on.

ZL-7901A MicroComputer Temperature & Humidity Controller for Egg Incubators