Patent ID: 7247231

Claim:
An analysis system comprising an analyzer and a check piece used for checking workings of the analyzer, the analyzer utilizing a test piece that includes a first terminal portion and a second terminal portion for measuring a concentration of a specific component in a sample liquid supplied to the test piece, the analyzer comprising: a set portion in which the test piece is set; a first measurement terminal for electrical connection to the first terminal portion; a second measurement terminal for electrical connection to the second terminal portion; a measurement electrical circuit to measure electrical physical quantities generated by the sample liquid in accordance with the concentration of the specific component; and a variable physical quantity output unit for supplying trial physical quantities for checking working of the measurement electrical circuit; wherein the electrical physical quantities are voltages, the trial physical quantities including a plurality of standard voltages, the variable physical quantity output unit being a constant-voltage power supply which can change an output level, the measurement electrical circuit serving to measure a voltage of the first measurement terminal; wherein the set portion is configured to receive die check piece instead of the test piece, the check piece being used for conducting the checking of the working of the measurement electrical circuit, wherein upon selling the check piece in the set portion, an electrical path extending in the measurement electrical circuit and the check piece is made, so that an output of the variable physical quantity output unit can be conducted to at least one of the first measurement terminal and the second measurement terminal, then through the check piece, and back to the measurement electrical circuit.