Cerabar PMP71B HART
Technical data
Hauser
71
15.2 Environment
Ambient temperature
range
The following values apply up to a process temperature of +85 °C (+185 °F). At higher
process temperatures, the permitted ambient temperature is reduced.
• Without LCD display:
• Standard:–40 to +85 °C (–40 to +185 °F)
• Optionally available: –50 to +85 °C (–58 to +185 °F)with restricted operating life and
performance
• Optionally available: –60 to +85 °C (–76 to +185 °F) with restricted operating life and
performance; under –50 °C (–58 °F): Ex d measuring devices can be permanently
damaged
• With LCD display: –40 to +85 °C (–40 to +185 °F) with limitations in optical properties
such as display speed and contrast. Can be used without limitations up to
–20 to +60 °C (–4 to +140 °F)
• Devices with PVC-coated capillary armor: –25 to +80 °C (–13 to +176 °F)
• Separate housing: –20 to +60 °C (–4 to +140 °F)
Applications with very high temperatures: use diaphragm seals with a temperature
isolator or capillaries. Use a mounting bracket!
If vibrations also occur in the application: use a measuring device with a capillary.
Diaphragm seal with temperature isolator: use a mounting bracket!
Ambient temperature T
a
depending on the process temperature T
p
The process connection must be fully insulated for ambient temperatures below
–40 °C (–40 °F).
T
a
T
P
1
T
p
T
a
+185
+257
+14
−40
[°C]
[°F]
[°C]
[°F]
−
−
−
50
40
40
−58
+85
+125
−40
−10
A0043571
1
Insulation material
Hazardous area
• For measuring devices for use in hazardous areas, see Safety Instructions, Installation or
Control Drawing
• Measuring devices with common explosion protection certificates (e.g. ATEX-/ IEC Ex,
etc.) can be used in hazardous areas with ambient temperatures to –60 °C (–76 °F)
(optionally available). The functionality of the explosion protection Ex ia is guaranteed
for ambient temperatures to –50 °C (–58 °F) (optionally available).
At temperatures ≤ –50 °C (–58 °F), explosion protection is guaranteed by the housing in
the case of flameproof enclosure (Ex d) type of protection. The functionality of the
transmitter cannot be fully guaranteed. The Ex ia capability can no longer be
guaranteed.
Summary of Contents for Hart Cerabar PMP71B
Page 83: ......
