Flender/Flender Gear Units/Helical gear Reduction Boxes H2
bat ry an electric generator. In the first case, the autonomy of operation (endurance) of the instrument shall be su

fficient to carry on working without frequent interruptions, and the instrument shall be equipped with an automatic switch which switches

it off when th battery runs down, in the second case, there must be voltage stabilising device with tolerance of

2 volts. 1.6 Probes The probes used shall have dimensions, frequencies, and refraction angle suited to the type of steel,

the diameter the thickness of the pipeline nd to the joint design. 1.7 Reference Sample Pieces The efficiency of the equipment used, the effective refractio angle of the probe, and the beam output points, shall be checked using 1 and 2 sample block, IIW type or the calibration block ASTM -4. For the calibration of runs and the regulation of detection ensitivity during the test, calibration piece be used. This iece shall be taken from the roduction material, and will be at least 1mm long (measured in the direction of the axis), and at least 5mm wide (measured in the direction of the circumference), (see Fig. 4 of this specification). In the middle of the inside and the outside surface of the ca libration piece groove shall be made. The groove will have rectangular cross-section, flat bottom and the following dimensions :- Depth : 1 +/- 0.1mm Breadth (measured parallel to the 1mm side) : 1 +/- 0.1mm Length (measured parallel to the 5mm side) not less than 3 0mm. In addition, the calibration piece shall have hole, 2mm in diameter, passing through its thickness and positioned so that during calibration the ech oes returning from the two grooves do not interfere with those returning from the hole. 1 of 1 STANDARD TECHNICAL SPECIFICATION MECON LIMITED REGD. OFF: RANCHI 8 OIL & GAS SBU, DELHI DOCUMENT NO. Page 5 of 6 TITLE MEC//0/2/0 REVISION : 0 PIPING FABRICATION AND ERECTION EDITION : 1 1.6 Calibration For precise c