17.4 Use In Hazardous Areas
Equipment which is intended for use in explosive atmospheres and
which has been assessed and certified according to international
regulations may be used only under specified conditions. The
components may not be modified in any way.
The appropriate regulations for service and repair must be properly
observed during such activities.
17.5 Year of manufacture
To identify the year of manufacture, refer to the serial number of the
instrument.
The second to last digit in the serial number indicates the year of
manufacture. For example, “H” indicates the manufacturing year is
2008.