Datasheet

Measurement Computing [phone]
2
[e-mail] mccdaq.com
MCC 134
Block Diagram
24-bit ADC
Input
Filters,
ESD,
and
OTD
Isolation Barrier
Raspberry Pi
Header
I2C
SPI
+5 V
+3.3 V
Board
Address
Matching
HAT
EEPROM
Digital
Isolator
Screw Terminals
CJC Sensors
Isolated
Power
Supply
Stackable
Connect up to eight MCC DAQ HATs onto a single
Raspberry Pi. Configure onboard jumpers to identify each
board in the stack.
• Reduce the load on the Raspberry Pi processor. Running a
program that fully loads all 4 cores on the Raspberry Pi
processor can raise the temperature of the processor above
70 °C. Running a program that only loads 1 core will oper-
ate approximately 20 °C cooler.
• Minimize environmental temperature variations. Place the
MCC 134 away from heat or cooling sources that cycle
on and off. Sudden environmental changes may lead to
increased errors.
Best Practices for Accurate Thermocouple Measurements
The MCC 134 should achieve results within the maximum thermocouple accuracy specifications when operating within the docu-
mented environmental conditions. Operating in conditions with excessive temperature transients or airflow may affect results.
In most cases, the MCC 134 will achieve the typical specifications. To achieve the most accurate thermocouple readings, MCC
recommends the following practices:
• Provide a steady airflow, such as from a fan. A steady airflow
can dissipate heat and reduce errors.
• When configuring multiple MCC DAQ Hats in a stack, posi-
tion the MCC 134 farthest from the Raspberry Pi board. Since
the Raspberry Pi is a significant heat source, placing the
MCC 134 farthest from the Pi will increase accuracy.
For additional information, refer to the Measuring Thermocouples
with the Raspberry Pi and the MCC 134 Tech Tip.