Hach WDMP sc, Руководство пользователя, Страница: 12 / 74

3.2.1 Electrostatic discharge (ESD) considerations
N O T I C E
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.
3.2.2 Wiring overview
Refer to Figure 6 for an overview of the connectors on the junction box.
Figure 6 Junction box connections
1 Controller connection 3 Pressure sensor connection
2 Probe and sensor connections 4 CL17 chlorine analyzer connection
3.2.3 Wiring for power—Junction box
Supply AC power to the junction box with the pre-installed AC power cord or with conduit.
For installation with a power cable, make sure that the factory-supplied or user-supplied cable is:
• Less than 3 m (10 ft) in length
• Not less than 18 AWG with applicable insulation colors for local code requirements
• A power cable with a three-prong plug (with ground connection) that is applicable to the supply
connection
• Connected through a cable gland (strain relief) that holds the power cable securely and seals the
enclosure when tightened
• Does not have a locking type device on the plug
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