Process conditions
Installation conditions
Any position
Zero point shift due to position can be corrected,
see page 16, " Zero point increase and decrease"
Ambient conditions
Ambient temperature
–40…+85°C (–40…+185°F)
For instruments approved for use in hazardous areas, see
Safety Instructions (XA…), Installation Drawing (CSA) or
Control Drawing (FM).
Ambient temperature range (temporary)
–40…+100°C (–40…+212°F)
Storage temperature
–40…+85°C (–40…+185°F)
Climatic class
4K4H to DIN EN 60721-3
Protection
– IP 65: Instruments with Harting plug Han7D
– IP 66/Nema 4X: instruments with cable gland, cable entry
or M 12 plug (in combination with gauge pressure sensor)
– IP 68 (1m water over 24 h) or NEMA 6P (1.8 m water over
30 min): instruments with assembled cable or M 12 plug
(in combination with absolute pressure sensor)
Electromagnetic compatibility
Interference Emission to EN 61326, Electrical Equipment
Class B, Interference immunity to EN 61326 Annex A
(Industrial) and NAMUR Recommendation EMC (NE 21)
Influence to EMC
≤
0.5%
Smart and PROFIBUS-PA electronics: Twisted, screened
pairs must be used.
Process conditions
Process temperature
Depending on maximum permissible temperature of filling
liquid of diaphragm seal and diameter of diaphragm
(see also page 12)
For instruments approved for use in hazardous areas, see
Safety Instructions (XA…), Installation Drawing (CSA) or
Control Drawing (FM).
Pressure specifications
The MWP (maximum working pressure) is specified on the nameplate. The value refers to a reference temperature of
20°C (68°F) or 100°F for ANSI flanges.
– Test pressure (over pressure limit OPL) = MWP (nameplate) x 1.5
– The pressure values permitted at higher temperatures can be found in the following standards:
EN 1092-1: 2001 Tab. 18; ASME B 16.5a – 1998 Tab. 2-2.2 F316; ASME B 16.5a – 1998 Tab. 2.3.8 N10276;
JIS B2201
The maximum pressure for the measuring device is dependent on the lowest-rated element with respect to pressure,
see following sections for this:
– permitted overload of the sensor, page 15, table "Measuring range"
– for process connections "Product structure" and "Dimensions", from page 19 onwards
Mechanical Construction
Design
Housing
Stainless steel (type F 15) with a surface roughness
Ra
≤
0.8
µ
m or aluminium (type F 18)
Optional electrical connection via
– M 20 x 1.5 cable gland
– Cable entry G ½, ½ NPT,
– Harting plug (Han7D) or M 12x1 plug
– assembled cable with reference air feed
Process connections
All common diaphragm seal versions, see "Product Structure"
and "Dimensions"
Materials
Housing
– Stainless steel 1.4404 (AISI 316L) or
– cast aluminium housing with protective polyester based
powder coating
Nameplate
Stainless steel housing
Aluminium housing
– Engraved on housing with laser
– 1.4301 (AISI 304)
Process connections (in contact with the medium)
1.4435 (AISI 316L)
Union nuts
1.4307 (AISI 304L)
Process diaphragm
PMP 46
(in contact with the medium)
PMP 48
– 1.4435 (AISI 316L)
– 1.4435 (AISI 316L), Hastelloy 2.4819 (C 276), tantalum,
PTFE film 0.09 mm (0.0035 in) on 1.4435 (AISI 316L) (not
for vacuum)
PTFE film 0.25 mm (0.0098 in) on 1.4435 (AISI 316L) (not
for vacuum)
O-Ring for
Stainless steel housing
cover sealing
Aluminium housing
– Silicone
– NBR
Bracket for pipe and wall mounting
1.4301 (AISI 304)
Filling fluid in diaphragm seals
Silicone oil, vegetable oil (FDA listed), glycerine,
high-temperature oil, Fluorolobe (see also page 12)
17
Содержание cerabar M PMP 46
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