PCE Instruments PT-DPM User manual

Moisture Meter PT-DPM

PCE Americas Inc.

711 Commerce Way

Suite 8

Jupiter

FL-33458

USA

From outside US: +1

Tel: (561) 320-9162

Fax: (561) 320-9176

[email protected]

www.pce-instruments.com/english

www.pce-instruments.com

PCE Instruments UK Ltd.

Units 12/13

Southpoint Business Park

Ensign way

Hampshire / Southampton

United Kingdom, SO31 4RF

From outside UK: +44

Tel: (0) 2380 98703 0

Fax: (0) 2380 98703 9

[email protected]

Introduction

Throughout this manual, the symbol

indicates more information about the particular topic

or feature is available on our website.

Go to: www.defelsko.com/manuals

NOTE:

The Dew Point Meter is a hand-held, electronic

instrument that measures, calculates and records

climatic parameters, quickly and accurately.

Measured parameters are:

Ta- Air Temperature

RH - Relative Humidity

Ts- Surface Temperature

Td- Dew Point Temperature

- Surface minus Dew Point

Power-up / Power-down

The PosiTector DPM powers-up when any button is

pressed. To preserve battery life, the instrument

powers-down after approximately 3 minutes of no

button activity. To power-down immediately, hold

both (-)(+) buttons for 5 seconds. Settings are

retained during power-down.

Air temperature

and humidity

sensor

Surface

Temperature

Sensor

Temperature

Operation Overview

Upon power-up, the following 5 parameters are

displayed and updated automatically each second.

RH - The relative humidity sensor is located inside

the white plastic housing. The sensor may require a

longer period to stabilize in the event of extreme

humidity changes.

Ta- The air temperature sensor is also located

inside the white plastic housing.

Ts- A surface temperature thermocouple is located

on the tip of the silver probe. It is spring loaded and

designed to quickly self-align on a surface. Press it

against a surface and allow a few seconds for the

value to stabilize. Do not drag the sensor over the

surface. Wet the surface for a faster response.

For surface temperature measurement over

a long period of time, consider using the optional

Magnetic Surface Temperature kit (pg. 11).

Td - The dew point temperature is a function of air

temperature and relative humidity (see ISO 8502-4

Annex A). It is the temperature to which a volume of

air must be cooled in order to reach saturation.

- The delta value is the surface minus dew point

temperature (Ts- Td). This value is important in

judging the risk of condensation, or dew, forming on

a surface. For example, ISO 8502-4 recommends

that, unless otherwise agreed, the temperature of a

steel surface generally should be at least 3°C (5°F)

above the dew point when paints are applied.

The instrument may require a period of time

before the above climatic parameters stabilize. This

is most noticeable when the instrument is relocated

from one extreme environment to another (i.e. from

a warm location to a cold location). A period of up to

30 minutes should provide adequate time for

stabilization.

NOTE:

(-) Button: causes the display to rotate 180°. Ideal

for right-side-up viewing when sensors are pointing

away from you. Press (-) again to restore display

position.

(+) Button: freezes the display. The instrument will

measure one more time, then hold all values and

display the hold icon . Press (+) again to unfreeze

the display. This feature does not work while in

Memory Mode.

Button: accesses the instrument menu (pg. 5).

Within the menu, the button is used to select an

option.

Smart TrendTM Indicators - identify rising, falling

or stable readings. The instrument compares each

measurement with the average of recent values in

an attempt to provide the current direction of change.

While the absence of an arrow does not necessarily

signify stability, it can be taken to mean that particu-

lar parameter is undergoing little or no change. Slow

changes in a parameter could therefore occur

without being noted by an indicator arrow. When

instructed to manually store a dataset into memory

(pg. 6), the instrument will wait for these Smart Trend

Indicators to disappear before recording all values to

memory.

Button Shortcuts:

Smart Trend

Indicators

Menu Operation

Current selection is displayed

with darkened background

Instrument functions are menu controlled. To access

the Menu, turn the instrument on, then press the

button.

Reset

Gage Info

Flip Display

Units

Language

Set Clock

Memory

Auto Log

To navigate, press (-) to scroll DOWN, (+) to scroll UP

and to SELECT. Press both (-)(+) buttons at any

time to exit any menu or select Exit from the Menu.

List boxes have a down arrow on the right-hand side.

Use the (-) and (+) buttons until your desired choice

appears, then press to select this choice and

move focus onto the next item.

“Focus” is currently at this

unselected (empty) Radio button

“Radio” buttons. Only one

can be selected at a time.

“List“ box

a “tick” indicates this square

box has been selected

Alarm

Setup

Storing a dataset into memory manually

Place the surface temperature sensor on the

surface. Press (+) to store the current dataset into

memory. If the Smart Trend Indicators indicate one

or more values are changing, the instrument will

beep and blink once every second until the dataset

values stabilize. When the dataset values have

stabilized, the LED will blink twice and the instrument

will emit a double beep. Dataset values are now

stored in memory along with the current time.

Memory Management

The PosiTector DPM can record 2,500 datasets in

up to 100 groups (batches) for on-screen analysis,

for printing to an optional IR printer, or for

downloading to a personal computer using optional

PosiSoft software and USB cable.

Memory

New Batch

-closes any currently opened batch and creates a

new batch name using the next higher number. For

example, if only Batch 1 and Batch 3 exist, then Batch

4would be created and made the current batch.

Memory is activated and the icon appears. New

batches are date stamped when they are created.

No. of

stored datasets in

the current batch

Current

Batch

Current

(live) dataset

Adataset contains 6 values: RH, Ta, Ts, Td,

Delta and the date/time when they were

recorded.

NOTE:

View

Delete

-removes a batch completely from memory. The

name is deleted and its datasets are erased.

-stops the recording process, closes the current

batch, and removes batch information from the

display.

First to appear is a graph of

individual data points as

shown in Figure 1. Scroll

through each dataset

parameter using the (-).

Press or (+) button to

view batch statistics and

individual datasets (see Figure 2). Figure 1

-lists all datasets beginning with the current or most

recently used batch.

Open

-selects a previously created batch name to open

and make current. The current batch name and

number of stored datasets will be displayed.

To exit press (-)(+) buttons simultaneously.

Scroll datasets using the (-) or

(+) buttons. Hold for 1 second

to scroll a page at a time.

- Average

- Standard Deviation

- Minimum value

- Maximum value

To return to graph view or to exit press .

Figure 2

Shortcut:

Downloading Measurements Stored in Memory

Datasets stored in the instrument’s memory (in

batches) can be downloaded to a computer using

optional PosiSoft software and USB cable (pg. 12).

Datasets are not erased from memory after

downloading.

Auto Log

Automatically displays and records datasets at user

selected time intervals for unattended operation.

When selected, the Log Interval

menu will appear on the display

as shown.

Navigate using the (-) (+)

buttons. Press to select the

element in focus, then select

OK.

The instrument will display the Auto Log symbol

and will begin recording. An

audible tick sound will emit from

the instrument every few

seconds to indicate recording is

in progress. At each interval,

the displayed values update,

the LED flashes and the dataset

is stored into memory.

Recording will continue until memory is full, the

instrument loses power, or the user turns off Auto

Log.

-prints stored datasets and/or summary to the

optional IR printer or to a PC’s default Windows

printer via the optional USB cable and PosiSoft

software. Press (-)(+) simultaneously to cancel

printing.

When tick box is checked, the

instrument will alert the user

when the surface temperature

is less than 3°C (5°F) above

the dew point temperature (

value). According to ISO 8502-

4 and ASTM D3276, steel surfaces should general-

ly be 3°C (5°F) above the dew point when painting.

The instrument will alert the user with an audio tone

and the LCD screen will reverse (see above) when

conditions may be unsuitable for painting.

Alarm

To conserve battery life, displayed values

only update at the Log Interval. The last recorded

values will remain “frozen” on the display until the

next interval values have been stored.

Recorded datasets are stored into the currently

opened batch. If no batch is open, a new batch will

be created. Datasets are recorded regardless of the

state of the Smart Trend Indicators (see pg. 4).

To turn off Auto Log, press the button and hold

until the next tick sound. A final dataset will be stored

in memory and the current batch will remain open.

Recorded datasets can be viewed on the LCD,

viewed graphically for quick trend analysis on-site

(see pg. 7) or downloaded to a printer or PC.

Downloading to a PC requires optional PosiSoft

Software (pg. 12).

-It is recommended that fresh alkaline batteries be

installed prior to an extended Auto Log.

-Auto Log works best with optional Magnetic Surface

Temperature kit (see pg. 11)

-If memory becomes full, or the instrument loses

power and shuts off, all previously stored readings

will remain in memory.

NOTES:

NOTE:

Set Clock

All batches are date-stamped when created, and all

datasets are time-stamped (24 hour format) when

stored into these batches. It is therefore important to

keep both the date and time current using this menu

button. Alternatively, the date and time can be

updated when the instrument is connected to the

optional PosiSoft software (pg. 12).

Reset restores factory settings and returns

the instrument to a known, out-of-the-box

condition. It is handy when you want to “start all

over”. The following occurs:

- all batches are closed and stored datasets are

erased.

- menu settings are returned to the following:

Memory = OFF Alarm = ON

A more thorough Reset can be performed by holding

the (+) button when the instrument is powered

down until the Reset symbol appears. It

performs the same function as a menu Reset with

addition of Units = °C, and Language = English.

Date and Time are not affected by any Reset.

Setup Menu

Setup

Reset

NOTE:

This option causes the display to rotate 180°. Ideal

for right-side-up viewing in any position.

Flip Display

This menu button converts the display and all stored

datasets from Celsius to Fahrenheit or vice versa.

Units

Shortcut: The (-) button flips the display.

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