Micropilot FMR66B HART
20
V. 1, Rev. 2, 26-07-2022
Hauser
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; below –50 °C (–58 °F): devices can be damaged permanently
• 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)
If operating outdoors in strong sunlight:
• Mount the device in the shade.
• Avoid direct sunlight, particularly in warm climatic regions.
• Use a weather protection cover (see accessories).
Ambient temperature limits
The permitted ambient temperature (T
a
) depends on the selected housing material and process
temperature range.
In the event of temperature (T
p
) at the process connection, the permitted ambient temperature (T
a
)
is reduced.
The following information only takes functional aspects into consideration. Additional
restrictions may apply for certified device versions.
Plastic housing material
Process temperature range:
–40 to +80 °C (–40 to +176 °F)
T
a
T
p
P2
P1
P3
P4
P5
A0032024
8
Plastic housing material; process temperature range: –40 to +80 °C (–40 to +176 °F)
P1 = T
p
: –40 °C (–40 °F) | T
a
: +76 °C (+169 °F)
P2 = T
p
: +76 °C (+169 °F) | T
a
: +76 °C (+169 °F)
P3 = T
p
: +80 °C (+176 °F) | T
a
: +75 °C (+167 °F)
P4 = T
p
: +80 °C (+176 °F) | T
a
: –40 °C (–40 °F)
P5 = T
p
: –40 °C (–40 °F) | T
a
: –40 °C (–40 °F)
In the case of devices with plastic housings and CSA C/US approval, the selected process
temperature range of –40 to +80 °C (–40 to +176 °F) is limited to 0 to +80 °C (+32 to +176 °F).
Process temperature range:
0 to +80 °C (+32 to +176 °F), with CSA C/US approval
