Specifikacije T204 en

Avery Berkel Technical Specification

T204

T204

super-precision beam cell

Description

A precision single-bridge shear beam force transducer manufactured in die steel with electroless nickel plating, designed for use in low profile platform scales and load cell in con-rod conversions of mechanical scales.

These transducers are mounted at one end and the load applied to the free end, via a through drilled hole or, with a blind hole machined to half the depth of the beam.

Capacities (E max

)

750 kg, 1500 kg, 3000 kg.

Accuracy

4000d OIML R60.

Approvals

OIML R60 Certificate No.

R60/1991-GB.97.02

Accuracy class C4.

V min

= E max

/15000

Examples of Use

● Low profile platform scales.

● Load cell in con-rod conversions of mechanical scales.

● Hoppers, tanks and silos.

● Overhead track scales.

● Engine test stands.

● Dynamometers.

Special Features

● Exceptional accuracies.

● Low profile.

● Simple to install.

● Insensitive to side loads.

● Excellent repeatability.

● Small creep and hysteresis errors.

● Special version, approved for use in hazardous areas to

CENELEC standards.

Specification

Resistance to Dirt &

Moisture

Sealed to BS EN 60529:1992

Classification IP65 & IP67.

Protection against total immersion in water for 30 minutes at a pressure corresponding to a 1 m head of water.

Enclosure

Strain gauges are encapsulated in butyl rubber and silicone sealant with an adhesed neoprene rubber cover.

Neoprene has excellent weathering/ageing resistance and is resistant to oils, refrigerants and mild acids. It may be affected by aromatic and halogenated hydrocarbons.

Avery Berkel

1

T204

Avery Berkel Technical Specification

Specification

Electrical Excitation (Recommended)

Electrical Excitation (Maximum)

Terminal Resistance (Input at 20

°

C)

Terminal Resistance (Output at 20

°

C)

Rated Output

Zero Balance

* Combined Error

Repeatability

30 min Creep and Zero Return (OIML R60)

Temperature Effect on Rated Output (-10

°

C to 40

°

C)

Temperature Effect on Zero Balance (-10

°

C to 40

°

C)

Overload Rating without affecting Performance

Ultimate Overload Rating

Maximum Permissible Side Load

Insulation Resistance (Minimum)

Deflection at Rated Output (750 kg, 1500 kg)

(3000 kg)

10V AC or DC

15V AC or DC

410

Ω

Nominal

350

Ω

Nominal

1.75mV/V

±

0.1%

±

1.0% Rated Output

±

0.012% Rated Output

0.01% Rated Output

±

0.0125% Rated Output

±

0.001%/

°

C

±

0.0025%/

°

C Rated Output

150% Rated Output

200% Rated Output

50% Rated Output

5,000 megohms

0.3 mm Nominal

0.8 mm Nominal

* The combined error is the maximum deviation from the true value (straight line drawn from zero to full load) when either applying or removing the load.

Electrical Termination

6 Core standard lengths 4.0 m and 10.0 m.

Input: black -ve, green +ve

Output: red -ve, white +ve

Reference: blue -ve, brown +ve

Note:

6 core cables may be shortened without affecting performance.

Hazardous Area Version

Special version approved for use in hazardous areas to CENELEC standards.

DEMKO certificate 97D.122103.

EEx ia II C T6.

U max in

I max in

W max in

L eq

C eq

24 V

400 mA

1.3 W

0

0

T

R1

R3

R2

T

T

R4

+ Brown

REFERENCE RETURN

Blue

+ Green

INPUT

Black

+ White

OUTPUT

Red

Screen

(not connected at load cell)

Circuit Diagram.

2

Avery Berkel Technical Specification

T204

Applications

M

L

Mounting

The transducer should be mounted using high tensile bolts, grade 8.8 (minimum), and tightened to a torque of 70 Nm.

Loading

A

L

L = Load Direction

M = Mounting Screws

This transducer is designed to operate with loads applied to the free end of the beam only.

If loads in excess of the rated capacity are envisaged, then suitable adjustable overload stops should be provided and adjusted to operate between 100% and

150% of rated capacity.

Platform Feet

For platform applications, two types of self-aligning, height adjustable feet are available as accessories:

1. For standard weighing applications, a stainless steel and nitrile rubber foot for use with the

Blind Hole version of the T204.

Nitrile rubber has good mechanical properties and is resistant to a wide range of petroleum oils and fluids.

It may be affected by aromatic and halogenated hydrocarbons.

2. For precision weighing applications and/or where aggressive chemicals may be present, an all stainless steel rolling ball foot for use with the

Through the Hole version of the

T204.

Rolling Ball

Foot Assembly

Nitrile Rubber

Foot with

Spherical

Loading Button using Blind

Hole Load Cell

View 'A'

Loading example - Low Profile Platform Scale.

Blind Hole T204

Ø80

Edge of Platform

Edge of Platform

Stainless steel/nitrile rubber foot for standard applications.

T204 Beam Cell

T204 Beam Cell

64-76 Adjustable

10

77-86 Adjustable

Through Hole T204

Ø75

All stainless steel ball foot for precision applications.

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T204

Avery Berkel Technical Specification

Dimensions

Through Hole Version

195 195

32 30 32

32

63.5

3 Holes Ø12.2

750kg Version

96.5

93

17 63.5

96.5

93

17

32

Blind Hole Version

195

2 Holes Ø12.2

1 Hole Ø17.5

1500kg & 3000kg Version

30

32 30

63.5

96.5

93

17

32

2 Holes Ø12.2

1 Hole Ø18 x 15 deep

Chamfered at 60

°

x 5 Deep

This brochure contains a general guide only of the product and shall not form part of any contract unless specifically agreed by Avery Berkel in writing in each case on the Order Acknowledgement.

The specification of the products described herein may vary from time to time and may be altered without notice.

Your local distributor:

Avery Berkel

R

E

G

ISTER

E

D

FM 01255

E mail: [email protected]

Internet: http://www.averyberkel.com

Foundry Lane, Smethwick,

West Midlands, England B66 2LP.

Tel: +44 (0)870 90 34343 Fax: +44 (0)121-555 6062

T204/12.99/Issue 4