Patent ID: 9255917
Filing Date: 2016-02-09
CPC Classification: G01N

Claim Text:
1. An analyzer calibrating system for calibrating a plurality of exhaust gas analyzing apparatuses, the system comprising: a calibration gas line for concurrently supplying a same calibration gas, from a calibration gas cylinder arranged in a cylinder chamber partitioned from a plurality of test chambers, to a plurality of analyzers provided in each of the plurality of apparatuses, the plurality of apparatuses being provided in the plurality of test chambers respectively; and a control unit adapted to determine whether or not an output value of each of the plurality of analyzers supplied with the same calibration gas is stable, wherein the control unit is configured to calibrate each of the analyzers having the output value determined to be stable and to stop the supply of the calibration gas to each of the analyzers having completed the calibration, wherein the calibration gas line comprises a plurality of branch lines respectively provided in a one to one correspondence with the plurality of analyzers and a plurality of on/off valves respectively provided on the plurality of branch lines, and wherein the control unit is configured to control the on/off valve provided on each of the branch lines to stop the supply of the calibration gas to each of the analyzers having completed the calibration.