20
6.3 Water (Mar 2022)
Overview
●
Purified water must be supplied to all Q-SUN Xe-2 testers.
●
Water is used by the humidifier to produce humidity.
●
Water is also used to spray on the test specimens in Xe-2 models with water spray.
●
Q-SUN models with water spray require much higher water purity than those with a humidifier and no water spray.
●
Reverse osmosis / deionized (RO/DI) water is
required
.
●
The Q-SUN tester warranty is voided if water purity conditions are not met.
Specifications
System
(Model)
Inlet Pressure
Flow Setting
Resistivity
Conductivity
Silica
Total
Dissolved
Solids
pH
Front Spray
(Xe-2-HSE)
30-80 psi
(207-522 kPa)
0.5L/min
> 5 M Ω•cm
< 0.2 μS/cm
< 0.1 ppm
< 0.1 ppm
6-8
Front and Back Spray
(Xe-2-HBSE)
5 psi
> 5 M Ω•cm
< 0.2 μS/cm
< 0.1 ppm
< 0.1 ppm
6-8
Humidifier
(Xe-2-HE)
3-80 psi
(21-552 kpa)
1.0 L/hr
> 200 k Ω•cm
< 5.0 μS/cm
Not
Important
< 2.5 ppm
6-8
NOTE:
Average Daily Volume is dependent on individual test cycles. See
Section 11
.
Figure 6.3a: Q-SUN Xe-2 water purity requirements.
Reverse Osmosis / Deionization System
The reverse osmosis / deionized (RO/DI) water system described on the next page produces water pure enough for
spray systems.
This type of RO/DI system is required for water spray in Xe-2 testers.
Use Type I, not Type II anion in the mixed bed tanks of the DI system.
The Strong Base
Type I
Anion resin in the mixed bed tanks is the most important part of these systems to prevent water
spotting. This is because strong base Type I anion resin is the only resin that can effectively remove suspended silica.
Suspended silica is the major cause of specimen spotting.
Type I anion is much better at removing suspended silica
than Type II. Unfortunately, Type II is the most common anion. So be sure to insist that your water purification supplier
installs Type I, not Type II. The cost for Type I anion is about the same as Type II.
Type I anion is only necessary in the mixed bed “polishing” stages of the deionization (
, Stage E), not in the
initial “rough” purification stages.
Flush out the water supply line prior to connecting to the Xe-2 tester.
Section 6. Set Up