Velleman K8067 User manual
UNIVERSAL TEMPERATURE SENSOR
K8067
ILLUSTRATED ASSEMBLY MANUAL H8067IP-1
Total solder points: 67
Difficulty level: beginner 1 2 3 4 5 advanced
Idealforconnectiontocomputerinterface
boards(K8000,K8055,K8047,..)
3
Features:
Small and compact unit.
Wide temperature range.
One single adjustment.
Excellent noise immunity thanks to current loop system.
Easily adaptable for 0..5V or 0..10VDC output.
Specifications:
Temp. range : -20 to +70°C
Output : 20mA current loop
Max. voltage : 10V in 500 ohm
Accuracy : 2° of full range
3-wire system
Power supply :
12VDC for 0..5V OUT
15VDC for 0..10V OUT
Current consumption : 30mA max.
Dimensions : 55x35x15
Features & Specifications
4
Assembly hints
1. Assembly (Skipping this can lead to troubles ! )
Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully.
1.1 Make sure you have the right tools:
• A good quality soldering iron (25-40W) with a small tip.
• Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look. This is called ‘thinning’ and will
protect the tip, and enables you to make good connections. When solder rolls off the tip, it needs cleaning.
• Thin raisin-core solder. Do not use any flux or grease.
• A diagonal cutter to trim excess wires. To avoid injury when cutting excess leads, hold the lead so they
cannot fly towards the eyes.
• Needle nose pliers, for bending leads, or to hold components in place.
• Small blade and Phillips screwdrivers. A basic range is fine.
For some projects, a basic multi-meter is required, or might be handy
1.2 Assembly Hints :
⇒Make sure the skill level matches your experience, to avoid disappointments.
⇒Follow the instructions carefully. Read and understand the entire step before you perform each operation.
⇒Perform the assembly in the correct order as stated in this manual
⇒Position all parts on the PCB (Printed Circuit Board) as shown on the drawings.
⇒Values on the circuit diagram are subject to changes.
⇒Values in this assembly guide are correct*
⇒Use the check-boxes to mark your progress.
⇒Please read the included information on safety and customer service
* Typographical inaccuracies excluded. Always look for possible last minute manual updates, indicated as ‘NOTE’ on a separate leaflet.
0
.0
0
0
5
Assembly hints
1.3 Soldering Hints :
1- Mount the component against the PCB surface and carefully solder the leads
2- Make sure the solder joints are cone-shaped and shiny
3- Trim excess leads as close as possible to the solder joint
REMOVE THEM FROM THE TAPE ONE AT A TIME !
AXIAL COMPONENTS ARE TAPED IN THE CORRECT
MOUNTING SEQUENCE !
You will find the colour code for the resistances and the LEDs on our website:
http://www.velleman.be/common/service.aspx
6
R1 : 10K (1 - 0 - 0 - 2 - 1)
R2 : 10K (1 - 0 - 0 - 2 - 1)
R3 : 10K (1 - 0 - 0 - 2 - 1)
R4 : 10K (1 - 0 - 0 - 2 - 1)
R5 : 200K (2 - 0 - 0 - 3 - 1)
R6 : 200K (2 - 0 - 0 - 3 - 1)
R7 : 200K (2 - 0 - 0 - 3 - 1)
R8 : 200K (2 - 0 - 0 - 3 - 1)
R9 : 100 (1 - 0 - 0 - 0 - 1)
R10: 100 (1 - 0 - 0 - 0 - 1)
R11: 100 (1 - 0 - 0 - 0 - 1)
2. Metal film resistors
R...
Construction
IC1 : 14P
3. IC socket, Watch the
position of the notch !
C1 : 100nF (104)
4. Capacitors.
C...
ZD1 : 12V0 - 500mW
1. Zenerdiode. Watch the
polarity !
ZD...
CATHODE
T1 : BC547
T2 : BC557
5. Transistors
VR1 : LM385 - 2.5 !!!
LM335
6. Voltage reference
RV1 : 10K
7. Multiturn trimmer
RV...
SK1 : 3p
8. Terminal block.
VR...
7
Construction
C2 : 100µF
9. Electrolytic Capacitor.
Watch the polarity !
C...
IC1 : TLV274 or eq.
10. IC. Watch the position of
the notch!
8
11. Sensor LM335
Fig. 2.0
The sensor can be placed at a remote location (fig 1.0) instead of on the board (fig 2.0).
Fig. 1.0
Sensor
Max. 1m
9
Remote location :
Use shielded cable (3.0) and connect the shielding to the ground (sensor pin marked with an arrow on the
PCB, see fig 4.0)
Max. sensor to board distance : 1m
Sensor and PCB must be shielded from moisture at all times. Use shrink tube or resin to protect sensor, fig 5.0.
Keep in mind that the sensor has a thermal response time of at least 4 minutes in still air.
Adding a shrink tube or resin will increase thermal response time.
Sensor
Sensor
shielding
Fig 3.0
Shielded cable
Fig 4.0
Fig 5.0
10
Sensor
On board :
Follow the steps displayed in figures 6.0 through 6.2 if you want to mount the sensor directly on the
PCB.
Solder now the connections of the sensor.
Fig. 6.0 Fig. 6.1 Fig. 6.2
GND
Solder
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