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Piezoresistive Force Transmitter
Series FA-23
2…15 kN
A double sealing system with piezoresistive pressure measurement cell enables a simple, exact
force measurement cell to be realized. The pressure measurement cell used may be calibrated
directly in force, taking into consideration the diameter of the piston which transfers the force via a
high-viscosity fluid to the pressure measurement cell.
The force transmitters are employed at locations where a force cannot be calculated directly from
the fluid pressure and area (e.g. if additionally the tank filling is under pressure).
One of many applications is e.g. the determination of the amount contained in a tank. The accuracy
of Series FA-23 is typically 15 litres with a 1500 litres tank.
Digital Indicators
For digital display of the force in Newton (N), the mass in kilogram (kg) or the weight in kilo
pond (kp), any display device may be connected.
KELLER has expanded its manometer range by the LEO 4, to which several force measurement
cells may be connected and which displays the sum of the forces or weights. The force values are
preferably read out via the digital interface.
For taring a tank, the weight may be read out from each individual force measurement cell. If the
volume of the tank is known, calibration of the tank content display can also be done on the spot by
setting the two points “tank empty” and “tank full” via the entry keys before and after filling.
SpeCifiCationS
Force Ranges (FS)
FA-23t
2t
5t
10t
15t
kN
Overloadt
3t
7t
15t
20t
kN
3-Wirettt
2-Wire
0,5…4,5 V@5 V*tt
4…20 mA t
Supplyt
4,75…5,25 Vtt
8…28 V
Linearity (incl. Hysteresis & Repeatability)t
0,5 % typ.
Output
Hysteresis (O-Ring Friction)t
< 1 Ntt
Total Accuracy 0…50 °C t
± 1 %FS
Frequency Band / Measurements per secondt
1 kHzt
Compensated Temperature Ranget
0…+50 °C
Operating Temperaturet
-25…+80 °C
Protectiont
IP 65
Vibrationt
20 g (5...2000 Hz, max. amplitude ± 3 mm), acc. to IEC 68-2-6
Shockt
20 g (11 ms)
CE-Conformityt
EN 61000-6-2, EN 61000-6-3, EN 61000-6-4
Dimensionst
Ø 34 mm, height 38 mm
*ratiometric to supply
Subject to alterations
05/06
KELLER AG für Druckmesstechnikt
St. Gallerstrasse 119t
CH-8404 Winterthurt
Tel. +41 (0)52 - 235 25 25t
Fax +41 (0)52 - 235 25 00
KELLER Ges. für Druckmesstechnik mbHt
Schwarzwaldstrasse 17t
D-79798 Jestettent
Tel. +49 (0)7745 - 9214 - 0t
Fax +49 (0)7745 - 9214 - 60
Companies approved to ISO 9001 / EN 29001
www.keller-druck.com
