Hach A1000, Основное руководство пользователя

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Electrical installation
D A N G E R
Electrocution hazard. Always remove power to the instrument before
making electrical connections.
D A N G E R
Electrocution hazard. Protective Earth Ground (PE) connection is
required.
Use shielded twisted-pair cable for all electrical connections except input
power. Use of non-shielded cable may result in radio frequency emission
or susceptibility levels higher than the allowed levels.
To prevent shock hazards from ground currents in inadequate ground
systems, connect the shield at only the analyzer end. Do not connect the
shield wire at both ends.
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.
Wiring overview
Make all electrical connections to the analyzer at the I/O connector
block. Refer to
Figure 1 on page 7 and Figure 9 .
All the connectors on the left side of the I/O connector block are opto-
isolated connectors and have no connection to ground or the internal
power of the analyzer.
Figure 9 I/O connector block
1 A-Net network connector (local
BNC cable only) 6 Digital Outputs connector
2 Data Acquisition connector 7 Digital Inputs connector
3 Printer connector 8 4–20 mA connector
4 Diagnostics connector 9 Auxillary connector (optional local
BNC cable)
5 Bias connector (12 VDC, 0.5 A)
System wiring
To make electrical connections to the analyzer, refer to the illustrated
steps in
Figure 10 to remove the I/O connector block.
12 English