Water (Sep 2020) - Q-Lab Q-SUN Xe-3 Series Quick Setup Manual

5.9 Water (Sep 2020)

Overview
● Purified water must be supplied to all Q-SUN Xe-3 testers.
● Water is used by the humidifier to produce humidity.
● Water is also used to spray on the test specimens in Xe-3 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
Spray System
Inlet Pressure Flow Setting
(Model)
Front Spray*
("S" models)
30-90 psi
(207-620 kPa)
Front and Back Spray*
("B" models)
Humidifier 10-90 psi
(non-"S" models) (69-620 kPa)
* A minimum of 30 psi is needed continuously during spray steps to ensure all specimens are exposed to water spray
uniformly. Failure to maintain adequate pressure for the duration of a spray step will cause the tester to produce a fault and
interrupt the test.
**15 psi is the flow setting for the Back Spray only.
*** Average daily volume during a spray step is based on a spray on time of 10 seconds and a spray off time of 50 seconds.
Adjusting the spray on/off time will change the average daily volume.
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-3 testers.
Important: Use Type I, not Type II anion in the mixed bed tanks of the RO/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. Note that Type I anion is only necessary in the mixed bed
"polishing" stages of the deionization, not in the initial "rough" purification stages.
Average Daily
Volume
0.16 liter/minute ×
1.4 liter/min
spray time***
0.65 liter/minute ×
15 psi**
spray time***
0.1 liter/min 44 liters/day
Resistivity Conductivity
>5M ohm•cm <0.2 μS/cm
> 200k ohm•cm <5.0 μS/cm
Section 5. Setup
Total
Silica Dissolved pH
Solids
<0.1 ppm <0.1 ppm 6-8
Not
<2.5 ppm 6-8
Important
41