ML-x17 DATA LOGGER MANUAL
Manufacturers of low power instruments
page 127
6
Maintenance and Repair
6.1 RTC Lithium Battery replacement
The battery of the data logger is designed to last for the lifetime of the instrument. It should not be necessary
to replace this battery.
6.2 Recalibration
Calibration of the data logger has been performed while manufacturing. YDOC guarantees the calibration
to last for 2 years. However in most cases the calibration will last for the lifetime of the instrument.
Calibration is important for high accuracy measurements and in situations where time stamping is very
important. The logger has a NTP-time-synchronize option, which is selectable by the user. The parts of the
data logger that could need re-calibration are:
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Analog inputs
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Real time clock
For most applications, the analog inputs are sufficiently accurate, and need no re-calibration for the lifetime
of the instrument. But in special cases, where the user demands a high precision measurement, the analog
interface may be re-calibrated after that period. High temperature deviations and harsh environment are
factors that needed to be considered. Please contact your local supplier for more information on
recalibration needs and
–support. The real time clock is also calibrated during the manufacturing process,
and has very good long life stability (see spec. sheet). Also, when operating in a harsh environment, the
need for a recalibration can be applicable. YDOC can perform overall calibrations any time you like.
6.3 XRAY
In the uncommon event of exposure to XRAY, extra precautions are needed. When the device is shipped
many times, and is scanned for a security check, the analog input calibration will be harmed. Although the
level of radiation is very low, the data logger can be harmed if the number of times that it is exposed to
radiation exceeds 10. What will happen is that the analog interface will drift outside its spec’s. As a
precaution the user can shield his device, with a metal can, to prevent from damage. Normally, the impacts
of these security-scans are very low and cause no problems.
