Technical data
Deltabar PMD78B HART
78
Hauser
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: –54 to +85 °C (–65 to +185 °F); below –50 °C (–58 °F): 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 either a diaphragm seal on one side with a
temperature isolator, or a diaphragm seal on one side or both sides with a capillary. Use a
mounting bracket!
If vibrations additionally occur in the application: use a device with a capillary.
Hazardous area
• For devices for use in hazardous areas, see the Safety Instructions, Installation Drawing
or Control Drawing
• Devices that have the most common explosion protection certificates (e.g. ATEX/ IEC Ex,
etc.) can be used in explosive atmospheres with an ambient temperature of
–54 to +85 °C (–65 to +185 °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.
Storage temperature
• Without LCD display:
• Standard: –40 to +90 °C (–40 to +194 °F)
• Optionally available: –50 to +90 °C (–58 to +194 °F) with restricted operating life and
performance
• Optionally available: –54 to +90 °C (–65 to +194 °F); below –50 °C (–58 °F): Ex d
devices can be permanently damaged
• With LCD display: –40 to +85 °C (–40 to +185 °F)
• Separate housing: –40 to +60 °C (–40 to +140 °F)
With M12 plug, elbowed: –25 to +85 °C (–13 to +185 °F)
Devices with PVC-coated capillary armor: –25 to +90 °C (–13 to +194 °F)
Operating altitude
Up to 5
000 m (16
404 ft) above sea level.
Climate class
Class 4K4H (air temperature: –20 to +55 °C (–4 to +131 °F), relative humidity: 4 to 100 %)
satisfied as per DIN EN 60721-3-4.
Condensation is possible.
