Hello, I looking for same information regarding digital clock K8089 & temperature sensor K8067.
My problem is:That I have mounted the digital clock K8089, and work ok but when a conect the temp sensor K8067 well then the clock stay on --ºC all the time, I have followed both manuals. I´ve ckeck all the components making sure the are in the right place, I¨ve ckeck the fitting cables going to the sensor, getting 12vdc and I also measure the outgoing miliamp going to hte clock y look ok,I think the problem is in the clock, is not getting the singnal from the sersor o the is someting wrong in the incaming isignal nthe clock ( the jumper are also set in the rignt place).
I´w like to know if the is another way of testing the clock and the sensor.
Thank for any information
And I hope for a good solution.
Measure voltage between two outer pins of temp. sensor connector.
Tempetature sensor K8067:
Measure, voltage GND & V+ = 12 vdc
GND & OUT = 9.5 vdc
Way too much, should not exceed 5V, hope that processor input is not damaged.
Check value of R2 and R5
Check assembly of sensor.
Check value of R2 = 10k (Sensor K8067)
Check value of R5 = 200k (Sensor K8067)
I´ve Check the assembly of sensor.
I´m still getting does voltage reading
I mean R2 and R5 of K8089 clock…
Check value of R2 = 10 Ohms (Clock K8089)
Check value of R5 = 240 Ohms (Clock K8089)
.
Right I conected back again, and:
I´ve check voltage Gnd and V+ = 12vcd ( Sensor K8067)
check voltage Gnd and Out = 0.002 vcd( Sensor K8067)
( this reading is because I´ve the sensor conected to the clock).
If I get a reading voltage without conted to the clock than a get 9.5 vcd
There is a problem with the sensor module.
Please check the assembly.
If you cannot solve the problem, you can return the sensor to:
Velleman Projects Tech. Dept.
Legen Heirweg 33
9890 Gavere
Belgium
OK, I will check everthing again.
Thank again for all your help.
Well, I´ve finaly found the problem,
At the end, after checking the Sensor K8067 I knew that Sensor was Ok so I when back to the Digital Clock K8089 and after a wail I found a soldering join that woud´nt make sense withe the electronic diagrama, so I cleaned again a make sore that were no touthing togetherand I put everything back and It worked.
Solution
Ccheck the electronic diagrama and look for R5 is very close to D1 and as I said is very easy to joined together.
Thank again for evey one
And I hope this can also help sameone.
Happy to read you were able to solve the problem.