Endress+Hauser Profi Bus Levelflex M FMP40 - Page 109

Levelflex M FMP40 with PROFIBUS PA Technical data
Endress + Hauser 109
10.1.5 Operating conditions: Process
Process temperature range The maximum permitted temperature at the process connection (see Figure for measuring point) is
determined by the O-ring version ordered:
!
Note!
The medium temperature can be higher.
However, when using rope probes the stability of the probe rope is reduced by structural changes
at temperatures over 350 °C.
!
Note!
The bare metallic probes are only insulated in the area of the bushing. Thus there is no danger of
electrostatic charging. The PA-coated rope has been tested and there is no dangerous electrostatic
charging. As a result, there are no restrictions on use in Ex-areas for any of the probes.
Process pressure All models: -1...40 bar/585,9 psi.
This range may be reduced by the selected process connection.
The pressure rating (PN) specified on the flanges refers to a reference temperature of 20 °C, for
ASME flanges to 100 °F.
Note!
All Levelflex probes have two levels of sealing. There is an O-ring seal and a moulded seal behind
that.
Materials in contact with
process
Dielectric constant • with coax probe:
ε
r ≥ 1,4
• Rod and rope probe:
ε
r ≥ 1,6
O-ring-material min. Temperature max. Temperature
1))
1) For PA coated probes, the maximal admissible temperature ist 100 °C (212 °F).
FKM (Viton) -30 °C/-22 °F +150 °C/302 °F
EPDM -40 °C/-40 °F +120 °C/248 °F
FFKM (Kalrez) -5 °C/23 °F
2))
2) The min. temperature of FFKM may be -15 °C (5 °F) if the max. temperature of +80 °C (176 °F) is not
exceeded.
+150 °C/302 °F
measured
here
Part Material
Seal See "Ordering structure" from → ä 8
Process connection See "Ordering structure" from → ä 8
Feed trough inner conductor 1.4462, Duplex CR22
NordLock washers 1.4547
Rope probe Rope probe blank: 1.4401
Weight: 1.4435
Rope probe coated:
galv. steel
PA 12 (Vestamid L 1940), suitable for use in food
Rod probe See "Ordering structure" from → ä 8
Coax probe See "Ordering structure" from → ä 8
Centering stars: PFA
All Probes with 1½"- and
flange connection
On the lower edge of the process connections: PTFE (Dyneon Hostaflon TFM
1600)
All Probes with ¾"- connection Lower edge of the process connections: PPS-GF 40