
B74 • 01/22 • GB • p. 4 of 12 • www.armano-messtechnik.com
Operating Instructions
Pressure Transmitter PTFi
5. Mounting
5.1 Mounting and Safety Instructions
DANGER! Risk due to electric shock!
Always mount the device in an unpressur-
ised and currentless state! Risk of explo-
sion, flying parts, leaking media, electric
shock!
• The technical data listed in the EU type examina-
tion certificate are binding. Please download the
certificate from www.armano-messtechnik.com.
• Ensure that the entire interconnection of intrinsical-
ly safe components remains intrinsically safe. The
operator is responsible for the intrinsic safety of the
overall system (the complete circuit).
• If there is an increased risk of damage to the device
by lightning strike or overvoltage, additional light-
ning protection must be provided!
• Handle an unprotected membrane with extreme
care; it can easily be damaged.
• Concerning outdoor installation or installation in
humid environments:
• Electrically connect the instrument immediately
after installation or prevent the ingress of mois-
ture e.g. by using a suitable protective cap (the
degree of protection specified in the data sheet
applies to the connected device).
• Select an installation position that allows splash
water and condensation to drain off. Ensure that
sealing surfaces are not exposed to standing
liquid!
• For devices with cable gland, the outgoing
cable must be routed downwards. If the cable
needs to be routed upwards, this must be done
in an initially downward curve.
• Install the device in such a way that it is protect-
ed from direct sunlight. In the worst case, direct
sunlight may result in the maximum permissible
operating temperature being exceeded. This
must be excluded if the device is used in explo-
sion-hazardous areas!
• A device with gauge reference in the housing
(small orifice next to the electrical connection)
must be mounted in such a way that the gauge
reference required for the measurement is pro-
tected from dirt and moisture. If the transmitter
is exposed to liquid, the gauge reference will be
blocked and the air pressure compensation will
be prevented. In this condition, a precise meas-
urement is not possible and the transmitter may
be damaged.
• Provide a cooling extension when used in
steam pipes.
4. Technical Data
Process
connection
clamp DN 25 (DIN 32 676),
stainless steel 316L (1.4435)
membrane stainless steel 316L
(1.4435) flush-welded
Measuring cell /
sensor
stainless steel 316L (1.4435)
internally welded
Case
field housing made of stainless steel
304 (1.4301), IP67, lateral display
Indication LC display
main indication (measured value):
5 digit, 7 segment indication
digit height 8 mm (0.31" )
additional indication (unit):
8 digit, 14 segment indication
digit height 5 mm (0.2")
52 segment bargraph
Output signal 4…20 mA, 2-wire
current consumption max. 25 mA
Supply voltage 12…30 V DC
Signal
behaviour
accuracy according to IEC 60 770:
≤±0.1 % FSO
turn-down: ≤1:5: no changes
turn-down: >1:5: e.g. turn-down 9:
≤0.1 + 0.015 x (9 − 5) % FSO
= 0.16 % FSO
Filling Liquid food grade oil
Measurement
accuracy
≤0.1 % FSO (including non-linearity,
hysteresis and non-repeatability)
Mechanical
shock
100 g / 11 ms
Mechanical
vibration
max. 5 g at 25 – 2000 Hz
Measuring Ranges / Overload Capability in bar:
Vacuum /
positive pressure
Positive pressure /
absolute pressure
Over-
pressure
Burst
pressure
−0.4 / +0.4 – 2 3
−1 / +1 – 5 7.5
−1 / +2 – 10 15
−1 / +4 – 20 25
−1 / +10 – 40 50
– 0 – 0.4 2 3
– 0 – 1 5 7.5
– 0 – 2 10 15
– 0 – 4 20 25
– 0 – 10 40 50
– 0 – 20 80 120
– 0 – 40 105 210