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8/2/2019 D241 en 01-Wire Crackmeter
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WIRE
CRACKMETERS
e x t e n s o m e t e r s
& j o i n t m e t e r s
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8/2/2019 D241 en 01-Wire Crackmeter
http://slidepdf.com/reader/full/d241-en-01-wire-crackmeter 2/2
WIRE
CRACKMETERS
e x t e n s o m e t e r s
& j o i n t m e t e r s
We reserve the right to change our products and specifications without prior notice.
SISGEO s.r.l. Via F. Serpero 4/F1 20060 Masate (MI) Italy Ph +39 02 95764130 Fax +39 02 [email protected]
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1
WORKING PRINCIPLE
Any movement of the steel cable due to a
displacement between transducer box and
target produces a rotation of the
potentiometer and therefore an electric
signal strictly proportional to the
displacement.
To keep the steel cable loaded a tensioning
device (balancer) is used. The stroke of the
balancer is 2 m and the loading capacity
can be up to 8 kg. The catenary of the cable
has to be minimised by careful selection of
cable size and tension. One turn of the
potentiometer corresponds roughly to
240 mm of displacement.
The reading of the potentiometer re-zero
after each rotation (dead angle of 5 dg
nominal).
electromagnetic compatibility according to EN 61326-1 and EN 61326-A1 directives for EMC emission and immunity
TECHNICAL SPECIFICATIONS
Wire crackmeter with overvoltage protection junction box
Model 0D241A20000
Mechanical range 2000 mm
Electrical range 240 mm/turn (1)
Sensitivity 0.03 mm
Accuracy ± 1 mm
(depends mainly on the thermal effect
from wire function of the lenght)
Repeatability ± 0.03 mm
Signal output 4-20 mA (current loop)
Power supply 12-24 V DC
Cable diameter 2 mm
Cable material stainless steel
Maximum wire tension 8 kg
Base (wire) lenght up to 30 m
(distance between transducer and target)
Operating temperature -20°C +60°C
Transducer protection IP65Instrument protection IP66 (2)
Housing size 300 x 200 x 185 mm
Target assembly shaped
Anchors n° 4 φ 12 mm , M 8 expansion bolts for transducer
and n° 1 φ 12 mm , M 8 for target
Material stainless steel
(1) One turn of potentiometer corresponds roughly to 240mm of displacement. The readingof the potentiometer re-zero after each rotation (dead angle of 5° nominal). The catenary ofthe wire has to be minimised by careful selection of wire size and tension.(2) The stainless steel cover protect the internal transducer from powerful jet of water.
