TRAMEX Skipper Plus Manuel utilisateur

Skipper Plus

MOISTURE METER

FOR THE MARINE INDUSTRY

Non-Destructive Moisture

Detection Instrument for GRP

(Glass Reinforced Plastic)

and Wooden Boats

User

Guide

Skipper Plus

User Guide

Introduction ............................................................4

Fig. 1 Skipper Plus Non-Destructive Testing ....4

Instrument Features ................................................5

Diagnosis ................................................................6

Osmosis in GRP......................................................7

Wooden Boats ........................................................7

Important ................................................................8

Operating Instructions ............................................8

Fig 2. Skipper Plus Features ..............................9

Working With Your Skipper Plus ..........................11

RANGE 1 ................................................................11

Testing Hardwood ..............................................11

Wood Decking....................................................12

Depth Of Field Penetration................................12

Relationship Between Relative ........................

Humidity and Moisture Content ........................13

Fig. 3 Relative Humidity / ................................

Wood Moisture Content Relationship................13

Notes on Specific Gravity (S.G.) ......................13

Fig 4. Wood Density Categorisation. ................14

How to use the Wood SG Tables ......................14

Fig. 5. Wood Specific Gravity ..........................

Adjustment Table ..............................................14

RANGE 2.................................................................15

Testing Glass Reinforced Plastic (G.R.P.) ........15

RANGE 3.................................................................15

Testing for Elevated Surface Moisture ..............15

Notes ......................................................................16

Warranty..................................................................17

Warranty Claims ....................................................18

Product Development ............................................18

Skipper Plus

User Guide

TRAMEX MOISTURE/HUMIDITY INSTRUMENTS

SURVEY ENCOUNTER: The intelligent moisture meter.

“State of the art” non-destructive moisture meter for measurement

and data logging of moisture in building materials.

MOISTURE ENCOUNTER PLUS

General purpose non-destructive moisture meter employing

advanced analog and digital technology.

CONCRETE ENCOUNTER CME 4

Non-destructive moisture meter for concrete floors.

CRH FLOORING

Non-destructive testing and data logging of moisture content and

relative humidity measurements in concrete (to ASTM F 2170-02,

ASTM F 2420-05 and BS 5325:2001 & 8203:2001), gypsum

screeds and sub-floors.

FLOOR INSPECTION KIT

Complete kit for moisture testing concrete, hardwood flooring,

sub-flooring and environmental monitoring.

MRH

Digital Moisture and Humidity Meter with 4 scales for wood,

roofing, masonry and drywall. Humidity probe also available.

Suitable for humidity testing of flooring by either the in situ probe

method (to ASTM F 2170-02 and BS 5325:2001 & 8203:2001) or

the RH hood method (ASTM F 2420-05).

PROFESSIONAL MOISTURE METER

Digital resistance meter with probes, tests deep into wood.

COMPACT MOISTURE METER

Economical pin-type resistance meter for wood.

DEC SCANNER

Mobile non-destructive surveying of flat roofs.

WET WALL DETECTOR

Non-destructive moisture evaluation and tracing in EIFS.

RWS ROOF AND WALL SCANNER.

For moisture scanning and leak tracing on roofing, EIFS and the

building envelope.

MOISTURE & HUMIDITY INSPECTION KITS ARE

AVAILABLE FOR THE FOLLOWING INDUSTRIES:

Floor inspection / EIFS wall inspection / Roof inspection /

Indoor Air Quality / Water damage restoration.

Skipper Plus

User Guide

Introduction

The Skipper Plus is a moisture detection instrument

that uses the latest in electronic technology to take

non-destructive moisture readings in GRP (Glass

Reinforced Plastic) and wooden boats. It enables you

to quickly check hulls and decks both inside and out-

side for trapped moisture.

Your Skipper Plus meter features three Ranges

enabling you to select the correct range for the mate-

rial and environment in which you are working. Use

Range 1 to give you the percentage moisture content

in Wood. Use Range 2 to indicate

on the comparative scale, moisture in GRP and use

Range 3 to indicate Surface Moisture on the com-

parative scale.

The instrument operates on the principle that the

electrical impedance of a material varies with its

moisture content. To measure / detect moisture, the

two co-planar conductive rubber electrodes mounted

on the base of the instrument case are pressed onto

the wood or GRP sample. The instrument measures

the electrical impedance of the material being tested

by creating a low frequency alternating electric field

between the electrodes.

This field penetrates the material under test up to a

depth of approximately 30 mm (1.25 inches),

depending on material being tested and range used.

The very small current flowing through the field is

inversely proportional to the impedance of the mate-

rial. The instrument detects this current, determines

its amplitude and, after processing, drives the point-

er of the moving coil meter to the computed mois-

ture value.

Skipper Plus

User Guide

Fig. 1 Skipper Plus Non-Destructive Testing

As there is a wide variation in the nominal electrical

impedance of different material types, the instrument

is provided with three selectable ranges which are

optimized for testing (1) Hardwood, (2) GRP and (3)

Surface Moisture.

Instrument Features

Your Skipper Plus employs advanced analog and

digital technology to enable the incorporation of

many useful features, which greatly extend the capa-

bility of the instrument.

• Three simple pushbutton controls, ON, RANGE

and HOLD.

• Non-destructive moisture readings taken in Wood

from 5% to 30% are displayed on a clear, easy to

read moving coil meter with a linear scale.

Comparative readings between 0 and 100 can be

taken in GRP.

• Audio signal sounds when meter indicates high

reading and can be disabled if required.

Transmit

Electrode

SKIPPER PLUS

Alternating

Electric Field

Material sample

under test

Receive

Electrode

Skipper Plus

User Guide

• The HOLD button freezes moving coil meter,

which facilitates readings taken out-of-sight.

• If HOLD was selected prior to supply timeout, the

held reading is restored next time the meter is

powered on.

• Automatic supply timeout (2 minutes) conserves

battery life.

• Supply timeout is automatically extended if a

change in the meter reading is detected or if any

button is pressed.

• Bleep warning on instrument sounder 10 seconds

prior to end of supply timeout period.

• Last used RANGE is memorized at supply time-

out and automatically selected next time ON but-

ton is pressed.

• Three LEDs indicate selected range, indicate if

HOLD selected and provide warning of battery

nearing end of useful life.

Diagnosis

Your Skipper Plus can be used to diagnose trapped

moisture which can contribute to osmosis in GRP

boats and rot and decay in wooden boats and wood-

en components. The Skipper Plus is also essential in

monitoring drying out of hulls and other boat com-

ponents prior to remedial treatment.

Skipper Plus

User Guide

Osmosis in GRP

Use Range 2 when checking GRP boats. Osmosis is

a general term used to categorise a condition where

GRP degrades under water. This degradation is

caused by water penetrating the gel coat and reacting

chemically with uncured resins, binders and other

elements in the GRP lay-up. Once reaction takes

place, pressure builds up and eventually blisters

form.

Osmosis is most often found on the underwater area

of the hull or immediately above the waterline. If the

Skipper Plus gives a high reading, it may indicate

osmosis. It is recommended that the immediate area

is thoroughly examined for blistering or other evi-

dence of osmosis.

(Note that some anti-foulings may give elevated

readings due to the presence of conductive material

in its composition. In these circumstances, it is sug-

gested that the anti-fouling be removed and further

testing carried out on the area.) The Skipper Plus

can be used to monitor the drying out prior to the

remedial treatment. Tramex Ltd. cannot accept any

responsibility for incidental or consequential dam-

age or cost caused as a result of using this instru-

ment.

Wooden Boats

Use Range 1 for Wooden boats. Moisture readings

for wood should be read from the top scale of the

meter marked %H2O Wood, which gives percentage

of moisture by weight from 5% to 30%.

In wooden boats, excess moisture trapped in the

wood itself or beneath layers of paint or within joints

HOLD

Skipper Plus

User Guide

in keel, bow etc. can lead in time to rot, decay and

structural damage.

As with a GRP boat, your Skipper Plus is a useful

preventative maintainance tool which can be used

for the annual examination of the hull above and

below the waterline, decks, cabin and inside and out-

side the boat.

The Skipper Plus can also be used to ensure the

wood is sufficiently dry to accept paint or other

coatings.

Important

Always drain water from the bilges before inspect-

ing a boat as water from within the boat could be

detected through the hull by your Skipper Plus . You

may get a slightly different reading from some

species of wood which may be of higher or lower

density than 0.6 S.G. (Hardwood), at which your

Skipper Plus is calibrated. See notes on Specific

Gravity and reading adjustment in Fig. 5 on page 11.

Operating Instructions

The instrument face with brief notes on the push but-

ton controls and LED indicators is shown below.

Skipper Plus

User Guide

Fig 2. Skipper Plus Features

1. Press the ON button to power up. The LED for the

last used scale will light. [Note – If the battery

voltage is getting low, the three LEDs will flash

sequentially for a short period. The instrument

will continue to operate for some time but it is rec-

ommended that the PP3 (9 volt) battery be

changed as soon as convenient.]

2. To change range, press/release the RANGE but-

ton until the LED opposite the required range

lights.

3. Press and hold your Skipper Plus directly on the

material being tested, ensuring both conductive

rubber electrodes are fully in contact with the sur-

- Surface Moisture

-Hardwood (0.6 S.G.)

Power On button.

Automatic switch off after

2 minutes if :

1. No button pressed.

2. No change in meter

reading.

Range Select button

LED indicators show:

1. Selected Scale/Power on.

2. Hold –

flashing LED .

3. Low battery

LEDs

flash sequentially.

Moving coil meter

Hold button

RANGE

Range 1. (%H2

Range 2. (Comparative

)

Range 3. (Comparative

)

100

%H?O

Wood

Com parative

- G.R.P.

Skipper Plus

User Guide

face. (Partial contact will give reduced readings).

4. Select RANGE 1 when measuring moisture con-

tent in Wood and read the upper line (% H2O

Wood) of the meter dial which is marked from 5%

to 30%. The audio signal will sound when meter

indicates a reading above mid scale.

5. Select RANGE 2 when surveying or inspecting a

GRP hull or fitting and read the bottom compara-

tive scale, which is marked from 0 to 100.

6. Select RANGE 3 when testing for elevated near

surface moisture in GRP and Wood materials and

read the bottom comparative scale, which is

marked from 0 to 100.

7. To turn audio signal on or off, press ON button

twice in quick succession.

8. The instrument will automatically power-off after

two minutes if no button is pressed or if no change

in meter reading is detected. If a button is pressed

or the meter reading changes, the power-off will

be extended for a further two minutes.

9. To hold readings press the HOLD button once.

While on Hold, the LED for the selected range

will flash. This facility is extremely useful if read-

ings are being taken in areas where it is difficult

to see the instrument dial. To release HOLD, press

the HOLD button again.

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