Dynisco SPX228, Руководство по эксплуатации

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P/N: 974153 | Rev: 072016 | ECO: 46503
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Temperature
The SPX can be used in media temperatures up to +85°C (based on configuration). If the pressure
transmitter is used in other applications, the safety and accident prevention regulations specific to that
application must be followed. Ambient temperature for the electronics housing is +85°C maximum in
areas that are not classified as hazardous.
Higher temperatures can result in damage and malfunction. Do not install the pressure transmitter in
places where these temperatures are exceeded.
Use in Hazardous Classified Areas
Several configurations of the SPX are designed and approved for use in hazardous classified areas. Units
intended for installation in these areas must bear the applicable approval agency label.
The SPX is specially designed for measuring pressure in explosive gas atmospheres for Zone 0 under
safety class II 1 G Ex ia IIC T6/T4 (T6, Ta = -20 to + 50°C; T4, Ta = -20 to + 85°C). The SPX is also approved
for hazardous gas area Zone 1 under safety class II 2 G Ex ia IIC T6/T4 (T6, Ta = -20 to + 60°C; T4, Ta = -20
to + 85°C).
The maximum T
med
(medium temperature) for temperature class T6 is +60°C and for T4 is +85°C. The
medium temperature for the SPX is defined as the temperature of the pressure transmission fluid below
the measuring diaphragm (See Figure 1-1). This temperature can be verified by measuring the surface
temperature at the base of the electronics housing.
For category 1 (Zone 0) installations, care must be taken to avoid the danger of ignition due to
electrostatic discharges (ESD). The chance for static build up on the cable surface during normal
conditions of use, maintenance and cleaning must be eliminated. Install the cable in an appropriate
conduit or use some other cable reliable installation technique to avoid static electricity at the cable
surface.
The free length of the cable must be below 5 cm. If metallic conduits are used they need to be
grounded. If nonmetallic conduits are used they need to be antistatic (< 1G Ohm/cm
2
).
The housing shall be connected reliably to the local equipotential bonding system.
Those variants that include the material aluminum shall be installed in such a way that sparking as a
result of impact or friction between aluminum and steel is excluded. Impact or friction between
aluminum and stainless steel is allowed if the existence of rust particles can be excluded.
For application as Category-1-Equipment the connecting cable shall be equipped with a suitable
conductive coating (R
surface
< 10
9
Ω) to avoid possible electrostatic charge.
After installation before operating the device the user must check that the complete
installation and wiring is intrinsically safe. Care must be taken that the power source is a
certified apparatus.