THERMO K click

Temperature range

With the type-K probe, available in our store, this click can measure temperature up to +480 °C. With a different  probe it can theoretically measure temperature up to +1372 °C.

THERMO K click has a PCC-SMP thermocouple connector onboard, suitable for all K-type probes.

MCP9600 IC from Microchip

The MCP9600 IC converts thermocouple EMF to degree Celsius with integrated Cold-Junction compensation. It corrects the thermocouple nonlinear error characteristics of eight thermocouple types and outputs ±1.5°C accurate temperature data.

4 alert outputs

THERMO K click has 4 alert outputs onboard that can be used to detect multiple temperature zones. You can define on which specific temperature the THERMO K click will send an alarm.

Low power modes

Low-Power modes are available for battery-powered applications. In shut-down mode the module uses only 2 µA.

Thermocouple probe

In order to use THERMO K clik you need to connect the appropriate K-type thermocouple probe (not included in the package) into the PCC-SMP connector.

Note: Our store offers Thermocouple Type-K Glass Braid Insulated probes.

Application

Hand-held measurement equipment, industrial equipment thermal management, petrochemical thermal management, etc.

Specifications

THERMO K click carries the MCP9600 IC from Microchip and and depending on the type of probe it uses, the click can measure temperatures from −200 °C to +1372 °C. THERMO K click is designed to run either on 3.3V or 5V power supply. It communicates with the target MCU through I2C interface.

Pinout diagram

This table shows how the pinout on THERMO K click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
Alert 4 output	Alert 4	1	AN	PWM	16	ALERT2	Alert 2 output
Alert 3 output	ALERT3	2	RST	INT	15	ALERT1	Alert 1 output
	NC	3	CS	TX	14	NC
	NC	4	SCK	RX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C Clock
	NC	6	MOSI	SDA	11	SDA	I2C Data
Power supply	+3.3V	7	+3.3V	+5V	10	+5V	Power supply
Ground	GND	8	GND	GND	9	GND	Ground

Jumpers and settings

Programming

The demo shows the temperature on the TFT or LCD display. It measures every half a second. We have examples for PIC, dsPIC, PIC32, ARM, AVR and FT90x compilers. The code snippet is from the Example folder of the PIC compiler and P18F87K22 MCU.

This example is a temperature reading routine. First, we are reading the “Thermocouple Temperature Register” and then we are converting the value to a temperature in the Celsius scale.

 1  float Read_Temperature()
2 {
3     float Temperature;
4
5     tmp_data[0] = MCP9600_TH;
6
7     I2C1_Start();
8     I2C1_Wr( MCP9600_I2C_ADDR );
9     I2C1_Wr( tmp_data[ 0 ] );
10     I2C1_Stop();
11     Delay_us( 50 );
12     I2C1_Start();
13     I2C1_Wr( MCP9600_I2C_ADDR | 1 );
14     tmp_data[ 0 ] = I2C1_Rd( 1 );
15     tmp_data[ 1 ] = I2C1_Rd( 0 );
16     I2C1_Stop();
17
18     if((tmp_data[0] & 0x80) == 0x80)
19     {
20         tmp_data[0] = tmp_data[0] & 0x7F;
21         Temperature = 1024 - (tmp_data[0]*16 + tmp_data[1] / 16);
22     }
23     else
24     {
25         Temperature = (tmp_data[0] * 16 + (float)tmp_data[1] / 16);
26     }
27
28     return Temperature;
29 }