Heartbeat Technology; Environment; Ambient Temperature Range - Endress+Hauser Liquiphant FTL64 Operating Instructions Manual

Liquiphant FTL64 HART
Endress+Hauser
15.2.9

Heartbeat Technology

Heartbeat Technology module
The software package consists of 3 modules. These three modules combined check,
evaluate and monitor device functionality and process conditions.
• Heartbeat Diagnostics
• Heartbeat Verification
• Heartbeat Monitoring
15.3

Environment

15.3.1

Ambient temperature range

The following values apply up to a process temperature of +90 °C (+194). At higher
process temperatures, the permitted ambient temperature is reduced (see diagram).
• Without LCD display: –40 to +70 °C (–40 to +158)
• With LCD display: –40 to +70 °C (–40 to +158) with limitations in optical properties,
such as display speed and contrast
Can be used without limitations: –20 to +60 °C (–4 to +140 °F)
Optionally available:
• –50 °C (–58 °F) with restricted operating life and performance
• –60 °C (–76 °F) with restricted operating life and performance,
Below –50 °C (–58 °F): measuring devices can be permanently damaged
T p
T a
T p
 34 Permitted ambient temperature T
A 230 °C (446 °F) sensor
B 280 °C (536 °F) sensor
1 Max. 50 h on cumulative basis
2 Only for ATEX and CSA certificates
T a
T a
[°F] [°C]
158 70
T a
2
32 0
-58 -50
-60
-50 0
-76
-58 32
T a
T a
[°F] [°C]
158 70
122 50
2
32 0
-58 -50
-60
-50 0
-76
-58 32
at the housing as a function of the process temperature T
a
Technical data
1
A B
[°C]
230 280 300
440 540 572
[°F]
1
A B
T p
[°C]
190 230 280 300
374 440 540 572
[°F]
in the vessel
p
T p
T p
T p
A0046917
57