Clear the Tester from the old waterPress the plunger to the bottom. Open the DI water bottlethe CAP and push the needlebelow the surface of the water. Fill in theTester with water, pulling the pistonto the up position.
Drain the water from the old tester by pressing down on the plunger. Open the DI-water bottle cap and insert the needle beneath the surface of the water. Fill the tester with water, pulling the plunger to the upper position.
empty strip the old waterby pressing the plunger. open the di water bottlethe cap and insert the needlebelow the water surface. filla strip of water, by pulling the plungerin an upright position, please.