DeFelsko PosiTector SST Manual de usuario

Soluble Salt Tester

Innovative

PosiPatchTM

For use with all

Bresle patch types

including the

Instruction Manual

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The Bresle ethod DeFelsko Patch is low cost,

latex-free, and works on nearly any surface

geometry or material. It features a low-tack

adhesive which creates a tight seal while

remaining easy to remove without leaving behind

any foam residue.

The Bresle ethod DeFelsko PosiPatch further

simplifies the Bresle method. It requires no

adhesive, as it is held to a steel surface by a

magnetic holding ring. It has a built-in port which

allows deionized (DI) water to be injected using a

dull polypropylene dispensing tube, eliminating sharp needles

from the test. It features a patented air-permeable membrane,

which automatically releases trapped air as DI water is injected,

then allows air bubbles to return and agitate the surface as

solution is withdrawn. It is also reusable, and a single PosiPatch

can be used for multiple tests.

The PosiTector SST can be used as a conventional conductivity

meter making it ideal for testing abrasive materials in accordance

with ISO 11127-6 and AST D4940-15. See Bresle Mode (pg.

10).

Introduction

The PosiTector Soluble Salt Tester (SST) is a hand-held

electronic instrument that measures the conductivity of a solution

and calculates the concentration of water-soluble salts on metal

surfaces in accordance with ISO 8502-6 (the Bresle ethod) and

ISO 8502-9. It consists of a PosiTector body (Standard or

Advanced) and an interchangeable probe.

The PosiTector SST is compatible with all Bresle ethod-type

patches including the Bresle ethod DeFelsko PosiPatch, Bresle

ethod DeFelsko Patch and other adhesive patches. While

compatible with any test patch, there are numerous advantages to

the DeFelsko patch solutions.

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Menu Operation

To access the enu, power-up the gage, then press the center

navigation button . Either the keypad or touch screen can be

used to navigate the menu. If desired, touch screen functionality

can be disabled within the Setup menu (See Touch, pg. 10).

Select a menu option by touching it, or use the and but-

tons to highlight the desired option and press to select it.

On menus longer than one page, the current page number is

displayed below the menu name. Navigate between pages using

when the first menu item is selected, or when the last

menu item is selected. If using touch, navigate between pages

by touching or , or by swiping up or down.

Press the button to power up the Gage. To conserve battery

life, the gage will automatically go to sleep after 5 minutes of

inactivity (15 minutes while in Bresle Mode, pg. 10). While in

Sleep Mode, the gage powers up significantly faster— convenient

when moving between parts or locations. The gage will completely

power off after 4 hours of inactivity. Alternatively, select Power Off

from the main menu. All settings are retained.

Quick Start

When a enu option is highlighted, the

icon indicates on-gage help is available.

Press or touch the icon to display the

help.

indicates that a sub-menu exists for the

enu option. Select the option to display its

sub menu.

Update your gage to ensure that you

have the latest on-gage help information.

NOTE:

Press the button or swipe right to return to a previous screen.

Select Exit to close the enu.

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When powered-up, the PosiTector automatically

determines which probe is attached and does a self-

check. To disconnect a probe from a body, slide the

plastic probe connector horizontally (in the direction of

the arrow) away from the body. Reverse these steps to

attach a different probe. It is not necessary to power-

down the Gage when switching probes.

Additionally, the PosiTector gage body accepts a wide variety of

probe types including magnetic, eddy-current and ultrasonic

coating thickness, surface profile, environmental, hardness, salt

contamination, and ultrasonic wall thickness probes.

PosiTector SST probes consist of a purpose-

built test cell, optimized for the range, resolution

and test volume of the Bresle ethod.

Conductivity measurements are compensated

to 25°C (77°F) using a built-in temperature

sensor, and the sample temperature is recorded

for each measurement. The probe can be used

as a conventional conductivity meter by

unchecking Bresle Mode (pg. 10).

Test

Cell

How To Measure

Test Preparation:

Use deionized (DI) water to thoroughly clean the PosiTector

SST test cell, test cup, syringe and PosiPatch (if used in test).

All test materials should be handled in a manner that minimizes

the potential for contamination. The PosiTector SST operator

may choose to wear nitrile or other non-contaminating gloves

when performing the test.

Remove the protective cap from the probe. Power-up the Gage

by pressing the button. In the default Bresle Mode, the Gage

guides you through three simple steps - 1, 2 and 3.

Probes

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Step 2: Prepare Bresle Method Patch

Option A: DeFelsko PosiPatch

a) Turn the PosiPatch and magnetic ring upside down. Place the

PosiPatch into the magnetic ring ensuring the arrows align

with the injection port. Do not touch the PosiPatch’s interior.

b) Carefully place the magnetic ring on the steel surface. When

used on vertical surfaces, position the injection port between

the 4 o’clock and 8 o’clock points before attaching the

magnetic ring to the surface.

c) Slowly inject 3.0 ml of DI water into the port using the plastic

dispensing tip. The air within the PosiPatch automatically

escapes through the air-permeable membrane.

Step 1: Obtain Background (Blank) Conductivity

Measurement (γ1)

The Gage automatically displays the previous

background measurement, if any. This measurement can be

reused and step (c) to step (e) can be skipped by pressing the

button.

a) Pour at least 4 ml (milliliters) of deionized (DI) water into the

supplied cup (to prevent contamination of the water source).

b) Fill the syringe completely with DI water from the cup (slightly

more than 3 ml).

c) Completely fill the PosiTector SST probe’s test cell with water

from the syringe (approximately 1 ml).

d) Wait until the measurement stabilizes (up to 5 seconds), then

press the button to save a new background conductivity

measurement (γ1) and the water temperature (T1).

e) Use the syringe to draw all of the water from the test cell.

Shake any remaining water out of the test cell.

f) With the syringe pointing up, expel the air and excess solution

from the syringe until there is 3.0 ml of DI water remaining.

NOTE:

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When used on horizontal surfaces, fully insert the dispensing tip

into the PosiPatch. On vertical surfaces, insert the dispensing tip

only as far as is needed to see the tip inside the PosiPatch.

b) c)

Option B: Bresle Method DeFelsko Patch (or equivalent)

a) Remove the backing and foam center from the patch, taking

care not to touch the interior surface.

b) Press the patch firmly onto the surface making sure most of

the air escapes.

c) Pierce the top of the patch at the foam perimeter, allowing the

needle to penetrate into the center of the patch.

d) Inject half of the water into the patch. Then, use the syringe to

withdraw trapped air.

e) Remove the needle, point it upwards and expel the air.

f) Re-insert the needle and inject the remaining water into the

patch.

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t= test duration

T2= sample temperature

Δγ= The change in conductivity. The

initial background measurement (γ1)

is automatically subtracted from the

final measurement (γ2). 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.

Step 3: Begin Test (applies to both patch styles)

a) Once the water is injected into either patch, press the but-

ton to start the test timer.

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. DeFelsko recommends a test time of two minutes or

longer.

c) After the desired amount of time has elapsed, withdraw the

water from the patch.

d) To complete the measurement, completely fill the PosiTector

SST probe’s test cell with the water from the patch. Wait

until the measurement stabilizes (up to 5 seconds), then press

the button to save the temperature (T2)and conductivity

(γ2) of the solution. Δγ, the difference between the γ2soluble

salt reading and the γ1background reading, is displayed.

TIP:

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If a memory batch is open, the measurement result will be stored

in memory (pg. 11).

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.

Rinsing the Test Cell

Rinse the test cell with unused DI water several times after each

measurement, shaking the water out after each rinse.

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Calibration and Verification

Two steps ensure best accuracy…

1. Calibration: typically performed by the manufacturer. All probes

include a Certificate of Calibration.

2. Verification of Accuracy: typically performed by the user by

measuring known reference standards such as the supplied

conductivity standard.

Calibration - Calibration is the high-level, controlled and

documented process of measuring traceable calibration standards

over the full operating range of the probe, and verifying that the

results are within the stated accuracy of the probe. Calibrations are

performed by the manufacturer, their authorized agent, or by an

accredited calibration laboratory in a controlled environment using

a documented process

Verification of Accuracy - Verification is an accuracy check

performed by the user with a solution of known conductivity. To

perform a verification, ensure that the conductivity standard and

instrument are at the same temperature. Remove any remaining

DI water in the test cell by filling it with the conductivity standard,

then inverting the test cell to empty it. Fill the test cell with the

conductivity standard again. If the reading is not within the

combined tolerance of the gage and conductivity standard,

proceed to Cleaning the Test Cell, below.

Cleaning the Test Cell - If the Verification reading is outside the

combined accuracy of the conductivity standard and gage, the

probe may need to be cleaned by filling it with DI water and

rubbing the walls of the cell with a supplied foam tip swab. Rinse

with DI water several times before using the cell.

Verify accuracy at the beginning and the end of each work shift.

During the work shift, if the Gage is dropped or suspected of giving

erroneous readings, its accuracy should be re-verified.

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Reset (menu Reset) restores factory settings and returns the

Gage to a known condition. The following occurs:

- All batches, stored measurements, batch names and screen

captures are erased.

- Calibration adjustments are returned to factory settings.

- The last stored background measurement (γ1) is erased.

- enu settings are returned to the following:

1. Power down the Gage and wait 5 seconds.

2. Simultaneously press and hold the and buttons until

the Reset symbol appears.

This returns the Gage to a known, “out-of-the-box” condition.

performs the same function as a menu Reset with the addition of:

- Date, Time and WiFi settings are not affected by either Reset.

Reset

Setup Menu

Memory = OFF

Bresle Mode = ON

Auto Dim = ON

Display = None

Patch Volume = 3.0 ml

Hi Res = OFF

Bluetooth & Stream = OFF

iFi & Access Point = OFF

USB Keyboard & Stream = OFF

BLE Keyboard = OFF

Surface Density units = mg/m2

Temperature units = °C

Units

Perform a more thorough Hard Reset as follows:

Flip Lock = OFF

Backlight = Normal

Auto Sync .net = ON

Sound = edium

Touch = ON

Language = English

Battery Type = Alkaline

Bluetooth Smart = OFF

USB Drive = ON

- Bluetooth Pairing info is cleared.

- enu settings are returned to the following status:

NOTE:

Allows the operator to change the displayed units for both

Temperature (°C or °F) and Surface Density (mg/m2or µg/cm2).

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