<2. Notes on Handling>
2-3
IM 01W03D02-01EN
Ambient Temperature
It is preferable to not to expose the instrument to
extreme temperatures or temperature fluctuations.
If FN310 is exposed to radiation heat a thermal
protection system or appropriate ventilation is
recommended.
Environmental Requirements
Do not allow FN310 to be installed in a location that
is exposed to corrosive atmospheric conditions.
When using this product in a corrosive environment,
ensure the location is well ventilated.
The unit and its wiring should be protected from
exposure to rainwater.
Impact and Vibration
It is recommended that the FN310 be installed in
a location that is subject to a minimum amount of
impact and vibration.
Installation of Explosion Protected Products
An explosion protected products is certified for
installation in a hazardous area containing specific
gas types. See subsection 2.6 “Installation of an
Explosion Protected Instrument”.
2.5 Use of a Transceiver
IMPORTANT
Although FN310 has been designed to resist
high frequency electrical noise, if a radio
transceiver is used near the FN310 or its
external wiring, the FN310 may be affected by
high frequency noise pickup. To test this, start
out from a distance of several meters and slowly
approach the FN310 with the transceiver while
observing the measurement loop for noise
effects. Thereafter use the transceiver outside
the range where the noise effects were first
observed.
2.6 Installation of an Explosion
Protected Instrument
If a customer makes a repair or modification to an
intrinsically safe instrument and the instrument is
not restored to its original condition, its intrinsically
safe construction may be compromised and the
instrument may be hazardous to operate. Please
contact Yokogawa before making any repair or
modification to an instrument.
WARNING
• Electrostatic charge may cause an explosion
hazard. Avoid any actions that cause the
generation of electrostatic charge, such as
rubbing surface of the product with a dry
cloth.
• To satisfy, IP66, IP67 and Type 4X,
- Connect to a connector JR13WPI-5P
(Hirose Electric) and tightened with a
specified torque.
- Apply waterproof glands to the electrical
connection port, at models FN310-
xx-M00, FN310-xx-M01, and FN310-
xx-M02.
• The instrument modification or parts
replacement by other than an authorized
representative of Yokogawa Electric
Corporation is prohibited and will void the
certification.
• When replacing the battery pack, be sure
to minimize the risk of explosion from
electrostatic discharge. Avoid any actions
that cause the generation of electrostatic
charge, such as rubbing surface of the
battery pack and product with a dry cloth.
CAUTION
• This instrument has been tested and certified
as being intrinsically safe. Please note that
severe restrictions apply to this instrument’s
construction, installation, external wiring,
maintenance and repair. A failure to abide by
these restrictions could make the instrument
a hazard to operate.
• Be careful to make sure that an intrinsically
safe apparatus, intrinsically safe devices,
and wiring to connect them are arranged so
that current and voltage are not induced by
electromagnetic or electrostatic induction
in the intrinsically safe circuit in order to
prevent impairment of the intrinsically safe
and explosion protected performance of the
intrinsically safe circuit.
