Hach Ultra MET ONE 237AB, User Manual, Page: 9 / 57

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General Information
2.1.3 Laser safety information
This particle counter contains a laser-based sensor that is a Class 1 product (as defined
by 21 CFR, Subchapter J, of the Health and Safety Act of 1968) when used under normal
operation and maintenance. The manual contains no procedures for service of internal
parts within this unit. Service should be performed only by factory-authorized personnel.
The particle counter has been evaluated and tested in accordance with EN
61010-1:1993, "Safety Requirements For Electrical Equipment For Measurement,
Control, and Laboratory Use" and IEC 825—1:1993, "Safety of Laser Products".
2.1.4 Electrostatic discharge (ESD) considerations
Important Note: To minimize hazards and ESD risks, maintenance procedures not
requiring power to the analyzer should be performed with power removed.
Delicate internal electronic components can be damaged by static electricity, resulting in
degraded instrument performance or eventual failure.
The manufacturer recommends taking the following steps to prevent ESD damage to
the instrument:
• Before touching any instrument electronic components (such as printed circuit cards
and the components on them) discharge static electricity. This can be accomplished
by touching an earth-grounded metal surface such as the chassis of an instrument
or a metal conduit or pipe.
• To reduce static build-up, avoid excessive movement. Transport static-sensitive
components in anti-static containers or packaging.
• To discharge static electricity and keep it discharged, wear a wrist strap connected
by a wire to earth ground.
Handle all static-sensitive components in a static-safe area. If possible, use anti-static
floor pads and work bench pads.
2.1.5 Battery safety information
WARNING
An explosion can occur if the internal battery is replaced incorrectly.
Figure 1 shows the label that appears on the battery for the safety of the user.
Figure 1 Battery safety label