261Gx, 261Ax | IM/261Gx/Ax-EN Rev. 08 39
9.2 Operating limits
9.2.1 Pressure limits
Overpressure limits
No damage will occur during transmitter operation, if they are
used within the specifications and subject to the following
limits:
Sensor code Overpressure limits, 0 abs to:
C, F 1 MPa, 10 bar, 145 psi
L 0.5 MPa, 5 bar, 72.5 psi
D 2 MPa, 20 bar, 290 psi
U 6 MPa, 60 bar, 870 psi
R 20 MPa, 200 bar, 2900 psi
V 90 MPa, 900 bar, 13050 psi
Test pressure
When carrying out the transmitter pressure test, it is essential
to observe the overpressure limits!
9.2.2 Temperature limits °C (°F)
Environment
Model 261GS, 261AS Ambient temperature limits
Operating temperature range -40 … 85 °C (-40 … 185 °F)
White oil filling -6 to 85 °C (21 to 185 °F)
LCD display -20 to 70 °C (-4 to 158 °F)
IMPORTANT (NOTICE)
For applications in potentially explosive atmospheres, the
temperature range specified on the relevant
certificate/approval must be observed.
Process
Model 261GS, 261AS Process temperature limits
Process temperature range -50 to 120 °C (-58 to 248 °F)
White oil filling -6 … 120 °C (21 … 248 °F)
1
1 ≤ 85 °C (185 °F) for operating pressures below the atmospheric pressure
Storage
Model 261GS, 261AS Storage temperature range
Storage temperature range -50 to 85 °C (-58 to 185 °F)
LCD display -40 … 85 °C (-40 … 185 °F)
White oil filling -6 to 85 °C (21 to 185 °F)
Model 261GS, 261AS Humidity during storage
Relative humidity Up to 75 %
9.2.3 Limits for environmental effects
Electromagnetic compatibility (EMC)
The devices conform to the requirements and tests for EMC
Directive 2014/30/EU, as well as EN 61000-6-3 concerning
emitted interference and EN 61000-6-1, EN 61000-6-2
concerning interference immunity.
The devices fulfill NAMUR recommendations.
Pressure Equipment Directive (PED)
The devices meet the requirements of Directive 2014/68/EU,
Category III, module H.
Humidity
Relative humidity: up to 100 %.
Condensation, icing: permitted.
Vibration resistance
Acceleration up to 2 g at frequencies of up to 1000 Hz (in
accordance with IEC 60068-2-6).
Shock resistance
Acceleration: 50 g
Duration: 11 ms
(according to 60068-2-27)
Humid and dusty atmospheres (IP rating)
The transmitter is dust and sand-tight, and is protected
against immersion effects as defined by the following
standards:
— EN60529 with IP 67 (with IP 68, IP 69K upon request)
— NEMA 4X
— JIS C0920
IP65 degree of protection with plug connection
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