DeFelsko PosiTector SST User Manual

5
Step [3]: Begin Test (applies to both patch styles)
a) Once the water is injected into either patch, press the (+) button to start the test timer.
Tip:
After starting the test timer, the operator can select Power Off from the Gage menu to
conserve battery life. The test timer will continue to run and the elapsed test time will be
displayed when the Gage is powered-up.
b) Without removing the needle/dispensing tip from the patch, use the syringe to repeatedly
withdraw and inject the water. ISO 8502-6 recommends this process be completed at least
four times and that the test time be agreed between interested parties.
c) After the desired amount of time has elapsed, withdraw the solution from the patch.
d) To complete the measurement, completely fill the PosiTector SST probe’s test cell with the
solution from the patch. Wait until the measurement stabilizes (up to 5 seconds), then press
the (+) button to save the temperature (T
2
) and conductivity (γ
2
) of the solution. Δγ, the
difference between the γ
2
soluble salt reading and the γ
1
background reading, is displayed.
t = test duration
T
2
= sample temperature
Δγ = The change in conductivity. The initial
background measurement (γ
1
) is automatically
subtracted from the final measurement (γ
2
). Test
results are displayed in units of microsiemens per
centimeter (conductivity).
ρA = The surface density of soluble salt expressed
as sodium chloride. Test results are displayed in units
of milligrams per square meter, or micrograms per
square centimeter.
If a memory batch is open, the measurement result
will be stored in memory (pg. 10).
e) Press the (+) button to begin a new test.
Patch Removal
The Bresle Method DeFelsko Patch peels off the surface easier and with less residue than
conventional Bresle patches. Remove it immediately after the test and dispose.
The Bresle Method PosiPatch lifts cleanly off the surface, with absolutely no residue. The user
may choose to discard the PosiPatch and begin the next test with a new one, or simply rinse it
with DI water and reuse for several more tests until worn.

DeFelsko PosiTector SST Specifications

General

Brand	DeFelsko
Model	PosiTector SST
Category	Measuring Instruments
Language	English