![YOKOGAWA 735201 User Manual Download Page 59](http://html.mh-extra.com/html/yokogawa/735201/735201_user-manual_911162059.webp)
IM 735201-01E
6-4
6.3 Periodic
Calibration
Periodic Calibration
1
)
Periodic calibration maintains the normal performance of the instrument over
long periods of time, and is an effective means of quickly identifying any
malfunctions that may occur.
2
)
The sensor head uses an optical filter based on glass material. If the optical
filter is subjected to high powered near-infrared light of approximately 400 nm
for long durations, reduced transmissivity may result. Additionally, the
sensitivity of the sensor may be reduced by a few percent due to any
reductions in the transmissivity. For precise measurements, it is
recommended to calibrate the instrument periodically (every six months).