An analyzer may include a body housing having a first ID, a first measurement module having a second ID that is different from the first ID, the first measurement module being releasably attachable to the body housing, a first memory in the body housing, the first memory being configured to store the first ID, first setting data and first correction data, a second memory in the first measurement module, the second memory being configured to store the second ID, second setting data and second correction data, a first CPU in the body housing, the first CPU being configured to detect the first measurement module having the second ID, and a first data transmission unit in the body housing, the first data transmission unit being configured to transmit the first setting data and the first correction data to the second memory.