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7. CALIBRATION AND VERIFICATION
Basic electronic calibration of the T700 Dynamic Dilution Calibrator is performed at the
factory. Normally there is no need to perform this factory calibration in the field
however, the performance of several of the instrument’s key subsystems should be
verified periodically and if necessary adjusted. These subsystems are:
Mass Flow Controllers: The accuracy of the mass flow controller outputs is intrinsic
to achieving the correct calibration mixture concentrations, therefore the accuracy of
their output should be checked and if necessary adjusted every 6 months (see
Sections 7.1 and 7.2).
O
3
Photometer: If your T700 is equipped with the optional O
3
photometer its
performance should be periodically verified against and external transfer standard
(see Section 7.3).
O
3
Generator: If your T700 is equipped with the optional O
3
generator, it should be
periodically calibrated (see Section 7.4).
7.1. VIEWING THE PERFORMANCE STATISTICS FOR THE
T700’S MFC’S
It is possible to view the target flow rate, actual flow rate and actual gas pressure for
each MFC via the FLOW submenu in the T700 calibrator (in real time). To access this
information, press:
06873B DCN6388