Hach EZ Serie Manuel De L'utilisateur page 14

5.3.1 Electrostatic discharge (ESD) considerations
Potential Instrument Damage. Delicate internal electronic components can be damaged
by static electricity, resulting in degraded performance or eventual failure.
Refer to the steps in this procedure to prevent ESD damage to the instrument:
• Touch an earth-grounded metal surface such as the chassis of an instrument, a metal conduit or
pipe to discharge static electricity from the body.
• Avoid excessive movement. Transport static-sensitive components in anti-static containers or
packages.
• Wear a wrist strap connected by a wire to earth ground.
• Work in a static-safe area with anti-static floor pads and work bench pads.
5.3.2 Electrical access
Connect external cables to the communications, relay or input/output module terminals through the
electrical access ports. Refer to
requirements. Keep the plugs in the electrical access ports that are not used.
Open the door to get access to the electrical connections. Refer to
overview.
The power switch is a circuit breaker that automatically cuts off the main power supply from the AC
power line if an overcurrent (short circuit for example) or overvoltage condition occurs.
Figure 4 Electrical access ports
1 M20 cable glands
2 M16 cable glands
14 English
N O T I C E
Figure 4. Refer to Specifications
3 M25 cable glands
4 Plug
on page 3 for wire gauge
Figure 5 for the electrical