3
THE SENSORS
Three standards models are available.
•
HF 36 / 0 for wire ropes from 3 to 8 mm diameter. Maximum capacity : 1.500 daN
•
HF 36 / 1 for wire ropes from 4 to 13 mm diameter. Maximum capacity : 5.000 daN
•
HF 36 / 2 for wire ropes from 10 to 22 mm diameter. Maximum capacity: 20.000 daN
•
HF 36/ 3 for wire ropes from 20 to 44 mm diameter. Maximum capacity: 40.000 daN
Making some small modifications, standards load cells can be adapted to different capacities or wire
ropes diameter .
•
HF 36 / S is a complete special load cell made in accordance with the customer’s requirement.
HF 87
/T
DISPLAY UNIT
This is an microprocessor-based digital display unit. It uses a data base correction system.
There is a wide range of wire ropes on the market, each one has its specification in terms of
composition, diameter, rigidity, elasticity, specific weight, etc . All these parameters influence the
measurement result. The “raw” signal generated by the stain gauges is converted by the
microprocessor using an included correction data base.
In accordance with the required accuracy, two different reading modes are provided.
1. Standard
Mode
The Standard mode readout uses a data bank to correct the “raw” signal provided by the sensor. Prior
to a wire rope control you have to enter in the display the followings details, via a simple to use menu :
•
Wire rope Diameter
•
from 4 to 22 mm with a 1 mm increment.
•
Wire rope Structure
•
Rigid (rIgI) = Steel single strand
•
Normal (nor ) = Steel multi-strand
•
Soft (SoFt) = Kévlar et textile ropes
When to use it ?
Standard Mode is used for load checking and balancing operations between different wire ropes.
In this application repeatability of the measurement system, within the 1% range, is most important.
The accuracy of the measurement is plus or minus 2,5%. (See data bank)
2. Special
Mode
The Special Mode readout refers to calibration operations to correct the “raw” measurement value.
Calibration is carried out under conditions identical to those found in actual situations. ( For example,
the in-line insertion of a dynamometer into the wire rope system to be checked.) The parameters
specific to each calibration are recorded numbered registers. When checks are made at a later date
on the same wire rope system, to access into the corresponding register number to call up the system-
specific parameters.
When to use it ?
The Special Mode readout is recommended for use when accuracy is most important.
Accuracy obtained in this mode is 1 %.
