Velleman H8009, Инструкция по сборке, Страница: 16 / 24

16
Test & adjustment
First we will test if the display works properly:
•
Connect a 12VDC / 300mA adapter (check the polarity and the connector
type) to the display. The display should indicate the time
00:00:00
(HH:MM:SS) and the (HH) should blink.
Next step is adjusting the displays- receiver to the transmitter. (skip this
step if a wired transmitter is used).
>Remote control button code.
•
Hold the transmitter about one meter (one yard) away from the display.
•
Press button 1 on the transmitter, the LED on the transmitter should blink
rapidly.
•
Now adjust the trimmer capacitor CV2 (RECEIVER ADJUST) on the display
using the supplied plastic tuning screwdriver, until the receiver LED (REC),
blinks at the same rate as the transmitter.
•
If a maximum range between transmitter - display is wanted, then it is advis-
able to repeat the above adjustment with the transmitter at about 10m (10
yard).
•
If the adjustment is OK, then the HH of the display should increase each time
button
1 is pressed.
G
Remark : Hold the display away from large metal objects.
Next step is to calibrate the temperature indication :
•
Disconnect the power supply from the display.
•
Reconnect the power supply to the display.
•
Put a known good thermometer next to the display temperature sensor.
•
Press repeatedly button 2 on the transmitter until the display shows
dAtE
blinking.
•
Now press button 1 until
rEGIOn
is blinking.
•
Next press button 2 ,
Eu
will blink. Use button 1 to choose between
Eu
(Europe) or
uS
(USA) display format for time, date and temperature.
•
Confirm your choice by pressing button 2 .
•
Now press the left button until
dEGrEE
is displayed and confirm with but-
ton 2 .
•
Now adjust the trim potentiometer RV1 (TEMP. CALIBRATION) until the dis-
played temperature corresponds with the “reference” thermometer.
G
Repeat the above adjustment after the display is warmed up for a few hours.
22. Test and adjustment
1
2