Abstract: In a data managing apparatus for an analytical device, when data managing software starts up, a log in dialog box is displayed, and an operator inputs ID and password of the access. In case the input ID and password do not match the registered ones, the ID and password are prompted again. When unsuccessful access is repeated for predetermined times, a preset electronic mail is sent to a registered address, and start-up command reception thereafter is prohibited. Since an administrator can take a proper response upon receiving the electronic mail right after the unauthorized access occurred, it is possible to maintain strict security, such that the administrator can identify an operator who tried the unauthorized access.

Abstract: An automatic exhaust gas analyzer for analyzing an exhaust gas of an internal combustion engine. The analyzer includes: a) plural analyzing units; b) two independent gas lines provided in each of the plural analyzing units; c) a gas-chromatographic column provided in each of the gas lines; d) a gas-chromatographic detector connected with the column in each of the gas lines; and e) a signal communication network interconnecting the gas-chromatographic detectors. Exhaust gas and the background gas are sampled at each stage of a predetermined run cycle, and are provided immediately to the two independent gas lines of the plurality of analyzing units respectively. Then the exhaust gas and background gas are analyzed in parallel in each of the plurality of analyzing units, which facilitates equalizing the measurement conditions of the two gases and the background correction of the measurement results of the exhaust gas can be made at high precision.