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13 

Connect the sensor to the interface board and apply power to the sensor board. Leave it idle for at least 15 
minutes, to allow it to adapt to ambient temperature and put a reliable thermometer next to the sensor. 
 
Run your software or the test software. 
Adjust 'T adj' on the K8067 board until the displayed temperature corresponds with the thermometer indica-
tion. 
 
If you cannot run the software at the time of calibration, follow these steps: 
 

 

Connect a 500 ohm resistor (2 x 1K in parallel) between GND and OUT. 

 

Apply power to the board (15VDC). 

 

Leave it idle for at least 15 minutes, to allow it to adapt to the ambient temperature and put a reliable ther-
mometer next to the sensor. 

 

Read the temperature. Divide the readout by 100 (e.g. 25.6°C = 0.256) 

 

Add 0.23 (0.256 + 0.23 = 0.486). 

 

Multiply the result by 10 (0.486 x 10 = 4.86). 

 

Measure the voltage over the 500 ohm resistor with a voltmeter. 

 

Adjust trimmer 'T adj' until you measure the calculated voltage (e.g. 4.86V). 

14. Calibration 

Calibration 

Summary of Contents for K8067

Page 1: ...ERSAL TEMPERATURE SENSOR K8067 ILLUSTRATED ASSEMBLY MANUAL H8067IP 1 Total solder points 67 Difficulty level beginner 1 2 3 4 5 advanced Ideal for connection to computer interface boards K8000 K8055 K...

Page 2: ......

Page 3: ...urrent 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 sup...

Page 4: ...he 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 ha...

Page 5: ...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 SEQ...

Page 6: ...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...

Page 7: ...7 Construction C2 100 F 9 Electrolytic Capacitor Watch the polarity C IC1 TLV274 or eq 10 IC Watch the position of the notch...

Page 8: ...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...

Page 9: ...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...

Page 10: ...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...

Page 11: ...To calculate the re sistor value divide the max desired voltage e g 5V by 0 02 The result is the required resistor value in ohms In this example 5 0 02 250 ohm 4 x 1K ohm resistor in parallel See dia...

Page 12: ...e code is supplied Use the source code as a guide to write your own applications The following formula converts the value returned by the AD converter to C C 101 AD value 256 23 256 is a value used wi...

Page 13: ...software at the time of calibration follow these steps Connect a 500 ohm resistor 2 x 1K in parallel between GND and OUT Apply power to the board 15VDC Leave it idle for at least 15 minutes to allow i...

Page 14: ...14 15 PCB layout PCB...

Page 15: ...5V GND GND 2 3 1 IC1A 5 6 7 IC1B 14 13 12 4 11 IC1D 9 10 8 IC1C R6 200K R8 200K R7 200K R5 200K GND R4 10K GND R3 10K R9 100E R10 SK1 GND V V V V V GND GND GND R1 10K V C1 100n GND VR1 LM385 2 5 0 20m...

Page 16: ...s and typographical errors reserved Velleman Components nv H8067IP 2004 ED1 rev 1 VELLEMAN Components NV Legen Heirweg 33 9890 Gavere Belgium Europe www velleman be www velleman kit com 5 4 1 0 3 2 9...

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