Pico TC08 USB THERMOELEMENT DATA LOGGER PP222 Manual Do Utilizador

A method of compensating for ambient temperature variations in thermocouple circuits.

See CJC.

The voltage range, relative to the ground of the data logger, within which both inputs of a differential
measurement must lie in order to achieve an accurate measurement.

An abbreviation for Dynamic Link Library. Files with this file extension contain a collection of Windows
functions designed to perform a specific class of operations.

The resistance measured between the input terminals of a circuit.

Stands for Noise Free Resolution.

The maximum input voltage that can be applied without damaging the unit.

Stands for Quiet Not a Number. In the context of the USB TC-08, QNaNs are numbers created artificially
to fill in gaps in sampling. These gaps are interruptions caused by lack of available PC or laptop
processor time, normally caused by too many applications being open simultaneously. QNaNs are
defined in the  IEEE 754-1985 ISO standard and are indeterminate, meaning no two QNaNs have the
same value.

In C/C++, the  int _isnan(double) function in the  <float.h> header can be used to identify QNaN float
representations, cast to a  double first. QNaNs will not cause an error if arithmetic operations are
performed on them - however, the results will remain indeterminate.

A value in bits, indicating how many increments of an analog input signal can be detected by a digital
measurement system. A high resolution measurement system detects smaller signal increments than a
low resolution measurement system.

A device consisting of two dissimilar metals joined together. The thermoelectric voltage developed
between the two junctions is proportional to the temperature difference between the junctions.