AUTOMATIC SYSTEM WITH PACE RATE CONTROL ALSO WHEN RELEASING THE LOAD
STANDARDS: EN 14580 | EN 1926 | ASTM D7012 | ASTM D2664 ASTM D3148 | ASTM D5407 | ISRM
It can be used with a MATEST high stability frame with capacity of 2000 or 3000 kN coupled to the Automatic Servo-controlled system
“Servo-Plus Evolution” (mod. C104N).
The appliance includes:
It is an hydraulic installation and has a high performance valve directly controlled by the digital unit that grants the automatic control of
the pace rate increasing the load, keeps a certain load and than controls the pace rate decreasing the load.
The setting of the pace rate is regulated by a very sensitive valve controlled by a step by step motor that allows a micrometric action on
the pace rate granting excellent results in the control of the load.
A laser position detector allows a rapid positioning of the piston and a very accurate touch point. This grants a touching sensitivity
of test starting of about 0.1 per thousand of the maximum capacity. When used in conjunction with the C104NLP (see p. 70) for the
application of the side pressure, the hydraulic system permits to maintain the pre-load level with extremely high accuracy.
Electronic measuring system
The high performance control and data processing unit controlled by a 32 bit microprocessor can manage up to 8 high resolution
channels for the control of load cells or transducers with strain gages bridge.
The unit contains two Analogical/Digital last generation converters with 24 bits resolution. The system processes the signals coming
from the load cells and from the extensometers giving all the results required for a further processing following the most updated
standards for this application.
Data acquisition and processing software UTM2 (Universal Testing machine 2) with License for Elastic Modulus on Rocks
The software has been developed on the working line of the already known software UTM-2 (windows menu). It contains the profiles of
the main Standards used, but the user can modify and personalise the test profile, which will be effected in a completely automatic way
by the testing machine.
The user must enter data concerning the specimen that will be tested and the kind of test that he wants to make: shape of the specimen
(cylinder-cube-block), dimensions, age of the specimen, average expected breaking value, etc. The appliance allows verifying the proper reading
of the extensometers and, if everything is within the expected tolerances, it manages the average deformation value read by the transducers
and processed by the digital unit, than it transmits all tests data throught a serial communication port RJ45 (Network Connection) to a Personal
Computer, that can already belong to the end user or be supplied separately (not included with the Software).
This data will be processed by the software and transformed in a graph load/deformation and load/time, following the specific Standards.
The software gives the possibility to print on a standard printer a test certificate reporting all data and graphs concerning the test and the
specimen. The software includes the license “Servonet” mod. C123N. The extensometers (proposed in two versions: A and B) are not included
in the supply and must be ordered separately (see accessories).
STANDARDS: UNI 6556 | ASTM C469 | ISO 6784 | DIN 1048
SOFTWARE to make Secant Compression Elastic Modulus tests on
The Elastic Modulus of Rocks mod. A150N must be used together
A) Extensometers (strain gages), single use, electric (obliged model
to perform tests with Hoek cells), available in different sizes,
B) Extensometers/Compressometers, electronic, universal,
which are not included in the standard supply and must be ordered
separately (see accessories)
A) ELECTRIC SINGLE USE EXTENSOMETERS, pack of 10 pieces
C125-10 Electric extensometer, base length 10 mm.
C125-11 Electric extensometer, base length 20 mm.
C125-12 Electric extensometer, base length 30 mm.
C125-13 Electric extensometer, base length 60 mm.
C125-14 Electric extensometer, base length 120 mm.
KIT for the application of single use extensometers composed
by: glue, welder, solder, cleaning liquid, accessories, the whole in
INTERFACE MODULE, “needed accessory” to connect up to 4
electric single use extensometers . This module allows also the
automatic calibration of the zero and of the measuring range after
a special thermal compensation. This grants a five times better
accuracy than the one requested by the Standards.
AS AN ALTERNATIVE:
EXTENSOMETER / COMPRESSOMETER, electronic, universal,
Technical details: see p. 286
TEMPLATE, to regulate and calibrate the
base length of the C134 extensometer