NGA 2000 CLD

Instruction Manual

HAS60E-IM-HW

June 2007

4-2 FUSES

The main power fuse may require replacement.

NOTE

Before replacing the fuse, remove power to the Analyzer Module.

See figure 2-3for the location of the main power fuse [T 6A 250 V (6x32 mm)], which protects 24 VDC input to the module.

NOTE

Use only fuses of the correct type and current ratings as replacements. Using repaired fuses and short circuiting of fuse holders is prohibited.

4-3 FANS

Refer to figure 4-1.To replace either rear panel fan, remove the cover of the Analyzer Module and then the rear panel. Disconnect connectors and remove screws. Assemble in reverse order.

4-4 OZONATOR

Refer to figure 4-1.To replace the ozonator, remove the two large straps and all tie-wraps, and disconnect the one electrical connection. Reassemble in reverse order.

4-5 PRINTED CIRCUIT BOARDS

CAUTION

The electronic parts of the Analyzer Module can be irreparably damaged if exposed to electrostatic discharge (ESD).

The instrument is ESD protected when the covers have been secured and safety precautions ob- served. When the housing is open, the internal components are not ESD protected anymore.

All four printed circuit boards can be replaced, if neces- sary. Refer to figure 4-1for location of the Driver, Power Supply, Signal and Computer Boards.

To remove any PCB (except the Computer Board), disassemble the enclosure side first. Ribbon and other cables are long enough to allow the entire side to be folded out from the remainder of the components. This makes PCB removal much simpler.

4 - 2 Maintenance and Service

Emerson Process Management GmbH & Co.OHG