2
DEVICE DESCRIPTION
8
OPTISWIRL 5080
www.krohne.com
07/2020 - 4008054001 - AD OPTISW5080 Exd Gb-Db en R01
2.5 Ambient temperature / temperature classes
Because of the influence of the temperature of the product, no fixed temperature class is
assigned to vortex flowmeters. The temperature class of these devices is rather a function of the
product temperature and ambient temperature that is present and the specific device version.
The classification is outlined in the following table.
The tables take into account the following parameters:
•
Ambient temperature T
amb
•
Product temperature T
m
INFORMATION!
The maximum permissible process temperatures listed in the tables are valid under
the following conditions:
•
The measuring device is installed and operated in accordance with the manufacturer's
installation instructions.
•
It must be ensured that the flowmeter is not heated by the effects of additional heat radiation
(sunshine, neighboring system components) and thus operated above the permissible
ambient temperature range.
•
Insulation must be limited to the piping. Unobstructed ventilation of the signal converter and
the remote flow sensor connection box must be ensured.
Temperature class
Permissible ambient
temperature
Permissible process temperature
T4
-40...+80
°
C / -40...+176
°
F
-40...+130
°
C / -40...+266
°
F
T3
-40...+80
°
C / -40...+176
°
F
1
-40...+190
°
C / -40...+374
°
F
T2
-40...+80
°
C / -40...+176
°
F
1
-40...+290
°
C / -40...+554
°
F
T1
-40...+80
°
C / -40...+176
°
F
1
-40...+430
°
C / -40...+806
°
F
Table 2-2: Permissible ambient and process temperatures for remote flow sensor
1
For safe operation de-rate the permissible ambient temperature to a lower value that ensures the housing
temperature does not exceed 80
°
C / 176
°
F at the housing reference point.
Temperature class
Permissible ambient
temperature
Permissible process temperature
T4
-20...+80
°
C / -40...+176
°
F
-20...+130
°
C / -40...+266
°
F
T3
-20...+80
°
C / -40...+176
°
F
1
-20...+190
°
C / -40...+374
°
F
T2
-20...+80
°
C / -40...+176
°
F
1
-20...+290
°
C / -40...+554
°
F
T1
-20...+80
°
C / -40...+176
°
F
1
-20...+430
°
C / -40...+806
°
F
Table 2-3: Permissible ambient and process temperatures for compact version and remote signal converter
1
For safe operation de-rate the permissible ambient temperature to a lower value that ensures the housing
temperature does not exceed 80
°
C / 176
°
F at the housing reference point.
