Electrical Installation; Wiring Overview - Hach AF7000 SCM Manuel D'utilisation De Base

• Use ½-in. NPT fittings for the inlet piping.
• Use ½-in. or larger NPT fittings for the outlet piping.
• If the water connections are user-supplied, install an elbow after the sensor to keep a 25–133 mm
(1–5.25 in.) head of water above the sensor (in the head height indicator pipe). Refer to
on page 7.
• If the automatic flush mechanism is used, plumb a clean water supply at 1–5 bar (14.5 to 72.5 psi),
10 bar (145 psi) maximum.
Note: The direction of sample flow can be in either direction through the sensor.

Electrical installation

Wiring safety information
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
Electrocution hazard. Always remove power to the instrument before making electrical connections.
Electrocution hazard. If this equipment is used outdoors or in potentially wet locations, a Ground Fault
Circuit Interrupt (GFCI/GFI) device must be used for connecting the equipment to its main power
source.
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.

Wiring overview

Figure 3 shows all of the possible connections for optional devices and communications.
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Figure 1