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Test No.4 HePLEX® Helium Porosimeter

for Grain Vol. using Matrix Cup

Introduction

This test can be used and conduct on a new generation of Helium Porosimeter Production educational series, and new generation of Helium with hand-operated valves. HeP is a Helium Porosimeter for Grain volume determination on samples (standard, irregular or coated) based on Boyle-Mariotte’s law. Sample is set in matrix cup; pore volume is deducted from bulk volume. Measurement system is computer operated. Calibration routine is provided with the same software.

Test Procedure

1- Connect process fitting at front side of the cabinet to a suitable dry gas facility, rating up to 220 psi. 2- Remove the cap at the bottom of the transmitter. Plug cable from the transmitter to the USB at right side of computer.

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4- Reset pressure display (offset) You can reset pressure sensor LEX locally as follow: • Press SELECT (left button) 3 times to display MANO at the bottom of the screen • Press ENTER (right button) • ZERO is displayed at the bottom of screen • Press ENTER to offset the device. Alternatively, you can remotely offset pressure reading from AppliLab software by Click on Offset button labeled”0” on the interface. Operator is guide to operate valves in sequence

5- Set reference pressure According to option, the reference pressure is 100 psig or 200 psig.

Adjust the pressure supply at the regulator of the gas facility (upstream N2 Porosimeter) to get about 120 or 220 psig (according to option). There is no need to get sharp 100 psig or sharp 200 psig. A pressure from 95 to 105 or respectively 190 to210 psig is acceptable. A relief valve built-in HeP will flow out exceeding pressure. • Open valve V01 • Read the pressure on the cabinet

• If the pressure reading is less than set point, turn clockwise the cabinet regulator knob to obtain the expected value and close back valve V01 • If pressure reading is greater than set point: • Close valve V01 • Open valve V02 while...