Specifications

Functional Description:

Double Strain Transducer LD-DD1-2

Triple Strain Transducer LD-DD1-3

Prepare the strain transducer by attaching the connecting rods

corresponding to the specimen to be tested.

The dimensions of the specimen (length of face resp. diameter) can be

adjusted by means of the scale at the connecting rods. Do the same with

the measuring length L

Now the strain transducer is clamped at the specimen. The design of the

strain transducer makes it possible to clamp it at a specimen which is

already placed in the testing machine and to remove it again.

When the strain transducer is exactly adjusted, the locking levers are

slewed out so that the measuring edges get free.

Zeroize the electronic system and charge the specimen corresponding to

the respective standard.

To avoid any damages, the specimen must not be charged until it breaks if

the strain transducer is clamped at.

Standard Test for the Determination of the E-Modulus according to DIN 1048

and EN 196

According to DIN 1046 ten load cycles have to precede the measuring cycle which

determines the E-modulus.

According to EN 196 1..3 load cycles have to precede the measuring cycle which

determines the E-modulus.

•

The lower test voltage is speci ed as 0,5 N/mm²

•

The upper test voltage is speci ed being approx. 30% of the expected

breaking load.

•

The loading speed should be 0,5 N/mm²/s.

The following values are necessary for the determination of the compression-

E-modulus:

= force difference in N=..

= area under pressure in mm²

= strain difference in mm = L…

= measuring length mm

These data must be inserted in the following formula:

ED = …