Technical data Deltabar PMD75B PROFINET with Ethernet-APL
86 Endress+Hauser
Process temperature range
(temperature at
transmitter)
Device without a manifold
• –40 to +85 °C (–40 to +185 °F)
Lower temperatures are optionally available.
• Pay attention to the process temperature range of the seal
Device with a manifold
The maximum permitted process temperature at the manifold is 110 °C (230 °F) (restricted
by IEC standard).
For process temperatures >85 °C (185 °F) where non-insulated side flanges are installed
horizontally on a manifold, a reduced ambient temperature applies up to a maximum
ambient temperature, calculated according to the following formula:
T
Ambient_Temperature_max
= 85 °C − 2.8 ⋅ (T
Process_Temperature
− 85 °C)
T
Ambient_Temperature_max
= 185 °F − 2.8 ⋅ (T
Process_Temperature
− 185 °F )
T
Ambient_Temperature_max
= maximum ambient temperature in °C or °F
T
Process_Temperature
= process temperature at a manifold in °C or °F
Process pressure range Pressure specifications
L
WARNING
The maximum pressure for the device depends on the lowest-rated component with
regard to pressure (components are: process connection, optional mounted parts or
accessories).
‣
Only operate the device within the specified limits for the components!
‣
MWP (maximum working pressure): The MWP is specified on the nameplate. This
value refers to a reference temperature of +20 °C (+68 °F) and may be applied to the
device for an unlimited time. Note temperature dependence of MWP. For flanges, refer
to the following standards for the permitted pressure values at higher temperatures:
EN 1092-1 (with regard to their stability/temperature property, the materials 1.4435
and 1.4404 are grouped together under EN 1092-1; the chemical composition of the
two materials can be identical.), ASME B 16.5a, JIS B 2220 (the latest version of the
standard applies in each case). MWP data that deviate from this are provided in the
relevant sections of the Technical Information.
‣
The overpressure limit is the maximum pressure a device may be subjected to during a
test. It is greater than the maximum working pressure by a certain factor. This value
refers to a reference temperature of +20 °C (+68 °F).
‣
The Pressure Equipment Directive (2014/68/EU) uses the abbreviation "PS". The
abbreviation "PS" corresponds to the MWP (maximum working pressure) of the device.
‣
In the case of measuring cell range and process connection combinations where the
overpressure limit (OPL) of the process connection is smaller than the nominal value of
the measuring cell, the device is set at the factory, at the very maximum, to the OPL
value of the process connection. If the entire measuring cell range must be used, select
a process connection with a higher OPL value (1.5 x PN; MWP = PN).
‣
Oxygen applications: do not exceed values for P
max
and T
max
.
‣
The measuring cells have been designed for high pressure ratings with load change.
Check the zero point regularly in the event of very frequent load changes up to the
nominal pressure 0 to 320 bar (0 to 4 641 psi) and 0 to 420 bar (0 to 6 092 psi).
‣
For the 10 mbar (0.15 psi) and 30 mbar (0.45 psi) measuring cells: check the zero
point regularly at pressures ≥ 63 bar (913.5 psi).
Burst pressure
As of the specified burst pressure, the complete destruction of the pressure-bearing parts
and/or a device leak must be expected. It is therefore imperative to avoid such operating
conditions by carefully planning and sizing your facility.
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