The instrument SDI-Easy is composed by a plastic handbag that contains the following components:
- 47 mm diameter membrane filter support
- 47 mm diameter membrane filters 0.45 micron pore size (kit 25 membranes)
- 1 to 2,5 bar manometer
- Pressure regulator
- Needle valve for pressure adjustment
- Timer
- Pipes and fittings
The analylis procedure is very simple:
1- Place the membrane filter on its support, bleed water pressure on carefully, tighten the O-ring seal and fix the support
vertically.
2- Adjust feed pressure to 2.1 bar (30 PSI) and measure initial time, to, necessary to filter 500 ml of sample water (feed
pressure to be keptconstant by continuous adjustment).
3- Keep filter in operation for 15 minutes under 2.1 bar (30 PSI) feed pressure.
4- After 15 minutes measure again time, t1, necessary to filter 500 ml. Membrane filter should be kept for further analysis.