DeFelsko PosiTector SST Bedienungsanleitung

Table of Contents

Introduction…………………………………………….….…..

Page 1

Basic Operation………..………………………………………

Page 1

Menu Operation………..………………………………………

Page 2

Probes……………………………………………………...……

Page 2

How to Measure……………….………………………….……

Page 3

Patch Removal…………………………………………………

Page 5

Rinsing the Test Cell……………………………………………

Page 6

Why is Measurement Important?.……………………….……

Page 6

Calibration, Verification and Adjustment……………….……

Page 7

Setup Menu………………………….…………………….……

Page 8

Units………………………………………………..….

Page 8

Reset………………………………………………..…

Page 8

Gage Info………………………………………………

Page 8

- Cal Adjust…………………………………..…………

Page 9

Patch Volume……………………………..…………

Page 9

- Bresle Mode…………………………………………

Page 9

- Hi Res…………………………………………………

Page 9

Memory Management…………………………….……………

Page 10

Accessing Stored Measurement Data…………………….…

Page 12

PDM – PosiSoft Desktop Manager……………………….…

Page 12

Connect Menu……………………………………………..……

Page 13

WiFi……………………………………………………

Page 13

- USB……………………………………………………

Page 14

- Sync .net Now………………………………..………

Page 15

- Bluetooth Smart………………………………………

Page 15

- Bluetooth………………………………………………

Page 16

- Bluetooth Wireless Printer…………………..…

Page 16

- Updates……………………………………….………

Page 17

Power Supply/Battery Indicator……………………………….

Page 17

Technical Data………………………………………………….

Page 18

Returning for Service………………………………..…………

Page 19

Warranty…………….………………………………..…………

Page 19

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 Method) 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 Method-type patches including the Bresle

Method DeFelsko PosiPatch, Bresle Method DeFelsko Patch and other adhesive patches. While

compatible with any test patch, there are numerous advantages to the DeFelsko patch solutions.

The Bresle Method 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 Method 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 ASTM D4940-15.

See Bresle Mode (pg. 9)

Recommended:

PosiTector SST Video: www.defelsko.com/sst/video

Basic Operation

The PosiTector SST powers-up when the center navigation button is pressed.

To preserve battery life, the Gage powers down after approximately 5 minutes of no activity

(15 minutes while in Bresle Mode, pg. 9). Alternatively, select Power Off from the menu.

All settings are retained.

Menu Operation

Gage functions are menu controlled. To access the Menu, power-up the gage, then press the

center navigation button. Below is a sample menu for a PosiTector Advanced Model:

To navigate, use the Up and Down buttons to scroll vertically and to SELECT.

Press the (+) button to switch pages

in a multipage menu.

Press the (-) button to return to the

previous menu or page.

Select Exit to exit from any menu.

Probes

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.

The PosiTector gage body accepts a wide variety of probe types including magnetic, eddy-

current and ultrasonic coating thickness, surface profile, environmental, Shore hardness

durometer and ultrasonic wall thickness probes. See www.defelsko.com/probes

PosiTector SST probes consist of a purpose-built test cell, optimized for

the range, resolution and test volume of the Bresle Method. 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. 9).

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 rubber cap from the probe. Power-up the Gage by pressing the center

navigation button. In the default Bresle Mode, the Gage guides you through three simple

steps [1], [2] and [3].

Step [1]: Obtain Background (Blank) Conductivity Measurement (

NOTE: The Gage automatically displays the previous background measurement, if any. This

measurement can be reused and steps (c) to (e) can be skipped by pressing the (-) button.

a) Pour at least 4ml (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 3ml).

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

(approximately 1ml).

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

3ml of DI water remaining.

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 port between the 2 o’clock and 10 o’clock points before attaching the ring to the

surface.

c) Slowly inject 3.0ml of DI water into the port using the plastic dispensing tip. The air within the

PosiPatch automatically escapes through the air-permeable membrane.

(a) (b) (c)

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.

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.

(a) (b) (c)

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.

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 (T2) and conductivity (γ2) of the solution. Δγ, the

difference between the γ2 soluble salt reading and the γ1 background reading, is displayed.

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.

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.

Rinsing the Test Cell

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

out after each rinse.

Protective Cap

PosiTector SST probe is shipped with a protective cap over the probe. Remove this cap prior to

use. Replace the cap to protect the indentor and presser foot when not in use.

Wrist Strap

We recommend attaching and wearing the supplied wrist strap.

Protective Lens Shield

The Gage display lens is covered with a thin plastic film for

protection against fingerprints and other marks during

shipment. This film, while usually removed before using the

instrument, can be left in place if desired. Replacements can be purchased.

Certification

All PosiTector SST probe includes a Certificate of Calibration. For organizations with

re-certification requirements, instruments may be returned at regular intervals for calibration.

DeFelsko recommends that customers establish calibration intervals based upon their own

experience and work environment.

Based on our product knowledge, data and customer feedback, a one year calibration interval

from either the date of calibration, date of purchase, or date of receipt is a typical starting point.

Written calibration procedures are available from DeFelsko Corporation at no charge.

See: www.defelsko.com/quality/calibration_procedures.htm

Why is Measurement Important?

Before the application of protective coatings, steel substrates must be carefully cleaned. The

surface should then be tested to determine if the level of salt contamination is acceptable or not.

Soluble salts are not visible to the naked eye. If allowed to remain on the substrate in sufficient

quantities, they can draw moisture through the coating and cause premature coating failure from

osmotic blistering or disbondment.

The test for water-soluble salts is performed in accordance with ISO 8502-9. As a part of that

method, the extraction of soluble salt contaminants for analysis is performed in accordance with

ISO 8502-6, commonly known as the Bresle Method.

Put simply, the Bresle Method involves placing a volume of water in a chamber against the steel

surface. This water dissolves soluble salts present on the surface, raising the conductivity of the

water. The measured increase in conductivity establishes the concentration of soluble salts.

Calibration, Verification and Adjustment

Three 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.

3. Adjustment - to a known 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

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.

NOTE: Always use fresh or new conductivity standard. The solution expiry date indicated on

each bottle is valid only if the bottle is unopened. A good rule of thumb is to discard the solution

one month after the bottle has been opened.

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.

Adjustment

Adjustment, or Calibration Adjustment, is the act of aligning the Gage’s readings to match that of

a known conductivity standard. See Cal Adjust, pg. 9.

Setup Menu

Allows the operator to change the displayed units for both Temperature (°C or °F) and Surface

Density (mg/m2 or µg/cm2)

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 (γ 1) is erased.

- Menu settings are returned to the following:

Perform a more thorough Hard Reset as follows:

1. Power down the Gage and wait 5 seconds.

2. Simultaneously press and hold the (+) and center buttons until the Reset symbol

appears.

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

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

- Bluetooth Pairing info is cleared.

- Menu settings are returned to the following status:

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

Displays the model number & serial number, probe type & serial number, PosiSoft.net registration

key, the amount of remaining memory for storage of readings, date and time, and software

packages.

For security purposes, the registration key is required to add the instrument to your free

PosiSoft.net account.

Memory = OFF

Bluetooth & Stream = OFF

Bresle Mode = ON

WiFi & Access Point = OFF

Auto Dim = ON

Surface Density units = mg/m2

Display = None

Temperature units = °C

Patch Volume = 3.0ml

Hi Res = OFF

Flip Display = Normal

Language = English

Backlight = Normal

Battery Type = Alkaline

Auto Sync .net = ON

Bluetooth Smart = OFF

White on Black = ON

USB Drive= ON

Sound = ON

Units

Reset

Gage Info

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