Safety Instructions: Zone; Temperature Tables - Endress+Hauser Levelflex FMP50 Safety Instructions

XA00634F-A
Safety instructions:
Zone 0

Temperature tables

Endress+Hauser
• In the case of process connections made of polymeric material or with polymeric coatings, avoid electrostatic
charging of the plastic surfaces.
• After aligning (rotating) the housing, retighten the fixing screw (→ Operating Instructions).
• When mounting the device:
- Exclude any mechanical damage or friction during the application.
- Pay particular attention to flow conditions and tank fittings.
• Continuous service temperature of the connecting cable: –40 to ≥ +85 °C; in accordance with the range of
service temperature taking into account additional influences of the process conditions
(T and T +20 K).
a,min a,max
• In the event of additional or alternative special varnishing on the housing or other metal parts:
- Observe the danger of electrostatic charging and discharge.
- Do not rub surfaces with a dry cloth.
Intrinsic safety
• The device is only suitable for connection to certified, intrinsically safe equipment with explosion protection
Ex ia / Ex ib.
• The intrinsically safe input power circuit of the device is isolated from ground. If the device is only equipped
with one input, the dielectric strength of the input is at least 500 V
than one input, the dielectric strength of each individual input to ground is at least 500 V
dielectric strength of the inputs vis-à-vis one another is also at least 500 V
• Observe the pertinent guidelines when interconnecting intrinsically safe circuits (GB3836.13, GB3836.15,
GB3836.16).
• The device can be connected to the Endress+Hauser FXA291 service tool: refer to the Operating
Instructions.
Basic specification, Position 3 (Power Supply; Output) = A
• When the device is connected to certified intrinsically safe circuits of Category Ex ib for Equipment Groups
IIC and IIB, the type of protection changes to Ex ib IIC T6 and Ex ib IIB T6.
Do not operate the probe in Zone 0 if connecting to an intrinsically safe circuit of Category Ex ib.
Basic specification, Position 3 (Power Supply; Output) = C
• When the intrinsically safe Ex ia circuits of the device are connected to certified intrinsically safe circuits of
Category Ex ib for Equipment Groups IIC or IIB, the type of protection changes to Ex ib[ia] IIC or Ex ib[ia] IIB.
Regardless of the power supply, all the internal circuits correspond to Ex ia IIC type of protection (e.g. service
interface, external display, sensor).
Potential equalization
• Integrate the device into the local potential equalization.
Overvoltage protection
• For installations which require overvoltage protection to comply with national regulations or standards
(GB3836.13, GB3836.15, GB3836.16), install the device using overvoltage protection (e.g. HAW56x from
Endress+Hauser).
• Observe the safety instructions of the overvoltage protection.
• In the event of potentially explosive vapor/air mixtures, only operate the device under atmospheric
conditions.
- Temperature: –20 to +60 °C
- Pressure: 80 to 110 kPA (0.8 to 1.1 bar)
- Air with normal oxygen content, usually 21 % (V/V)
• Associated devices with galvanic isolation between the intrinsically safe and non-intrinsically safe circuits are
preferred.
• Only use the device in media to which the silicone rubber potting compound of the electronic insert and the
housing made of PBT, aluminum or 316L have sufficient durability.
• If there is a risk of dangerous potential differences within Zone 0 (e.g. through the occurrence of atmospheric
electricity), implement suitable measures for intrinsically safe circuits in Zone 0 (e.g. in accordance with the
requirements of GB3836.13, GB3836.15, GB3836.16).
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