Maintenance - Emerson Fisher 4320 Instruction Manual

Instruction Manual
October 2009
J1 PWR
HART
TERMINAL
TERMINALS
COVER
SCREWS
W9640

Maintenance

When replacing any of the components of the 4320
wireless position monitor the maintenance should be
performed in an instrument shop whenever possible.
WARNING
Before performing any maintenance
procedures on the 4320 wireless
position monitor:
D Always wear protective clothing,
gloves, and eyewear when performing
any maintenance procedures to avoid
personal injury or property damage.
D Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
CAUTION
When replacing components, use only
components specified by the factory.
Always use proper component
replacement techniques, as presented
J2 GND
TERMINAL
POWER
MODULES
Figure 22. Fisher 4320 Wireless Position Monitor
4320 Wireless Position Monitor
ELECTRICAL ACTIVE SCREWS (4 TOTAL)
SCREWS PROVIDE MECHANICAL CONNECTION TO
HOUSING (4 TOTAL)
in this manual. Improper techniques or
component selection may invalidate
the product specifications, as
indicated in table 1. Improper
replacement techniques or component
selection may also impair operations
and the intended function of the
device.
When replacing components, proper
means of electrostatic discharge
protection is required. Failure to use a
grounding strap, or other means of
electrostatic discharge protection can
result in damage to the electronics.
When operating in temperatures −20_C
(−4_F) and below the LCD display will
not operate and the push buttons will
be disabled. If maintenance is needed
and the use of the wired HART port is
required, remove power from the 4320
and re-apply. The wired HART port will
be usable for one hour.
CAUTION
Note
21