Gefran CT Data Sheet

CT ( A - B - C - D)

TOROIDAL FORCE TRANSDUCER FOR
INDUSTRIAL APPLICATIONS

MECHANICAL DIMENSIONS

Main features

• Range of measurement: from 100 to 3000 kN

• Accuracy class: 0,5%

• Elastic element in stainless steel

• Corrosion resistant

• Internally generated calibration signal

• Grade of protection: IP65 (DIN 40050)

The CT series force transducers, have been specially desi­gned for use in polymer processing in applications where it is
required to measure the reaction force produced by the extru­sion pressure on the gearbox along the axis of the screw.
They measure a force whose value is indicative of the extru­sion pressure over the area of the screw.
The CT series force transducers can also be used in all other
applications where it is required to measure the forces on
shafts or columns and in any application where the geometry
demands a toroidal form load cell.

mod.

CTA

CTB

CTC

CTD

Dimensions mm. (± 0,1)

TECHNICAL DATA

0,5%

100...3000 kN
2mV/V

<± 1% FSO

< ± 0,5% FSO

< ± 0,06% FSO

< ± 1% FSO

80%FSO ± 1%

< ± 0,02% FSO°C
< ± 0,02% FSO°C
< ± 0,02% FSO°C

700 Ohm

> 10 GOhm

10 V
15 V

-20...+50°C

-20...+60°C

-30...+80°C
130% Ln

150% Ln

> 300% Ln

40% Ln

< 0,1 mm

IP65

VPT02A10-6PT2

Stainless steel

Anodize aluminium

Accuracy
Nominal full scale load (Ln)

Nominal output at FSO

Output tolerance at Ln

Combined errors: Non linearity
Histeresis, Repeatibility

Creep (after 30 min. at Ln)
Zero load out of balance signal
Calibration signal *
Thermal drift in Sensitivity

compensated Zero
range Calibration

Nominal input resistance
Isolation resistance
Nominal supply voltage
Maximum supply voltage
Compensated temperature range
Maximum temperature range
Storage temperature range

Permitted static load
Maximum applicable load
Rupture load
Maximum static lateral load

Maximum elastic deformation at Ln

Grade of protection (DIN40050)
Electr. connections: Connector
Elastic element material
Case material

* The exact value is indicated on the instrument nameplate.

Ln (kN)

100
200
300
200
300
500
750
500
750
1000
1500
1500
2000
2500
3000

A

46

70

94

110

B

54,2
52,6
50,7
76,2
74,9
72,2
72
102,8
100,2
97,9
95,3
124,1
120,1
115,8
111,4

C

57,8
59,7
61,4
81,3
82,5
84,9
84,7
112,1
114,2
116,5
118,6
146,2
149,6
152,9
156

D

80

101

140

196

E

45

45

60

60

F

15

45

45

80

Load introduction
direction

Load introduction

surface

DTS_CT_0709_ENG

GEFRAN spa reserves the right to make any kind of design or functional modification at any moment without prior notice.

ELECTRICAL CONNECTIONS

CONVERSION TABLE

ORDER CODE

Cells connected in parallel

In systems that use several cells, the parallel
connection automatically sums the loads on each
individual cell.
Using this method of measurement, the maximum load
will be the sum of the loads on the individual cells and
the sensitivity will be the average value of these cells.
It is important that the user ensures that no cell is
stessed beyond its maximum rating under any load
condition.

Kg

1

0.102

0.454

N

9.807
1

4.448

Lb

2.205

0.225
1

OPTIONAL ACCESSORIES

If the transducer is supplied complete with prewired
connection cable, the colour code is that indicated in the
table.

APPLICATION NOTE

For a correct use of the transducer, it is necessary to ensure
that the load is evenly distributed over the application surfaces
shown in the diagram.
It is essential to centre the transducer using the circular crown
of diameter C and to apply the load installing the transducer
between two grinded surfaces perpendicular to the direction of
the applied load.

Ex.: CTC - KN1M

CT force transducer, model C, measurement range
0 - 1000 kN.

If request, it is possible to sup­ply models with non-standard
mechanical and/or electrical
features.

Force transducer CT

Mod. MEASUR. RANGE (kN)

KN1C
KN2C
KN3C

D

C

MODEL

A
B

CTA

0-100
0-200
0-300

KN2C
KN3C
KN5C

KN7.5C

CTB

0-200
0-300
0-500
0-750

CTC

0-500

0-750
0-1000
0-1500

KN5C

KN7,5C

KN1M

KN1.5M

CTD

0-1500
0-2000
0-2500
0-3000

KN1.5M

KN2M

KN2.5M

KN3M

Connectors

Female cable connector
Grade of protection IP65 CON300

6-pin connector with 8m (25ft) cable C08W
6-pin connector with 15m (50ft) cable C15W
6-pin connector with 25m (75ft) cable C25W
6-pin connector with 30m (100ft) cable C30W

Other lengths

consult
factory

CONNECTOR

VPT02A10-6PT2

CONNECTOR

OUTPUT

SIGNAL +

SIGNAL ­EXCITATION +

EXCITATION -

CALIBRATION SHUNT

Blue-Orange

Red
Black
White

Green

CABLE

OUTPUT

Red
Yellow or Black

White
Green

Yellow-Green

Red
Yellow or Black

White
Green

Yellow-Green

Yellow-Green

Red
Yellow or Black

White
Green

SHUNT BOX