DPM PosiTector Quick Manual

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PosiTector DPM

Quick Guide v. 3.1

Dew Point Meter

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Introduction

The PosiTector Dew Point Meter (DPM) is a hand-held, electronic instrument that measures, calculates and records climatic conditions, quickly and accurately. It consists of a body (Standard or Advanced) and probe (Built-In or Separate).

This Quick Guide summarizes the basic functions of the instrument. Download the full instruction manual at: www.defelsko.com/manuals

A typical instrument screen is shown below, consisting of RH, Ta, Ts, Td, and Ts-Td readings. This group of readings is referred to as a dataset

RH - Relative Humidity (measured) Ta - Air Temperature (measured) Ts - Surface Temperature (measured) Td - Dew Point (calculated) Ts-Td - Surface minus Dew Point

Temperature (calculated)

Tw - Wet Bulb Temperature (calculated)

(Advanced Models Only)

The PosiTector DPM powers-up when the center navigation button is pressed. Readings are updated automatically each second. To preserve battery life, the instrument powers down after approximately 5 minutes of no activity. All settings are retained.

Scroll through Trend Charts

(Advanced only)

Access the Menu

Pause / Resume

Restore brightness after dimming

(Advanced only)

The Pause/Resume (+) button stops values from automatically updating to allow for closer examination of the relationship between the values or to allow time to manually record the entire dataset. Press (+) again to resume.

Button Functions- Normal Operation

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To disconnect a probe from a body, power-down the instrument and pull the plastic probe connector horizontally (in the direction of the arrow) away from the body. Reverse these steps to attach a new probe.

When powered-up the PosiTector automatically determines what type of probe is attached and does a self-check.

Setup

Setup Menu

Reset

Reset (soft reset) restores factory settings and returns the instrument to a known condition. The following occurs:

- All batches, stored datasets, images and batch names are erased.

- Menu settings are returned to the following:

Memory = OFF Auto Log = OFF

Bluetooth = OFF Trend Chart = None

Perform a more thorough Hard Reset by powering down the instrument, waiting several seconds, then simultaneously holding both the center and (+) buttons until the Reset symbol appears. This returns the instrument to a known, “out-of-the-box” condition. It performs the same function as a menu Reset with the addition of:

The PosiTector DPM can automatically alert the user when current climatic conditions exceed pre-set values. When selected, the Alarm icon is displayed at the top of the screen.

Standard models will alert the user when the surface

temperature is less than 3°C (5°F) above the dew point temperature. Enable by selecting the tick box.

Advanced models allow the user to set up custom alarm

conditions for each reading in a dataset.

Alarm Mode

Alarm

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- Bluetooth Pairing info is cleared.

- Alarm values are set to default.

- Menu settings are returned to the following:

NOTE:

- Date and Time are not affected by either Reset.

Units = Celsius Flip Display = Normal Auto Sync = OFF Alarms = OFF Alarm Sound = OFF Wet Bulb = OFF White on Black = OFF

Language = English Battery Type = Alkaline Backlight = Normal Auto Log Interval = 5 min Bluetooth Streaming = OFF USB Drive= ON

Wet Bulb

When selected, the wet bulb temperature (Tw) is displayed on the main screen. It is calculated from Ta and RH using an air pressure of 1.0 atmospheres (1013 mbar). Variations of Tw at other pressures could be greater than ±1°C (±2°F).

This menu item only appears when all memory functions

are turned off. Wet Bulb readings cannot be stored in memory.

NOTE:

(Advanced models only)

Displays a real-time graph of the readings over the last three minutes. Use Trend Charts to monitor short-term environmental changes and spot trends.

Press the Up button to scroll through

the trend charts

Trend charts can only be displayed

when memory is off.

Trend Chart

Shortcut:

(Advanced models only)

NOTE:

Battery Type

Selects the type of batteries used in the instrument from a choice of “Alkaline”, “Lithium” or “NiMH” (Nickel-metal hydride rechargeable). If NiMH is selected, the instrument will trickle charge the batteries while connected via USB to a PC or optional AC charger. The battery state indicator icon is calibrated for the

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Advanced models store 100,000 datasets in up to 1,000

batches (groups). “New Batch” closes any open batch and creates a new batch name using the lowest available number. The icon appears. New batch names are date stamped when they are created.

Remove the last reading from the current open batch by

pressing (-).

Shortcut:

Scroll through display modes

(Advanced only)

Delete last dataset

Access the Menu

Store a dataset in memory

Restore brightness after dimming

(Advanced only)

Memory Management

Memory

The PosiTector DPM can record datasets in memory for printing to the optional Bluetooth wireless printer, transferring to a computer or synchronizing with PosiTector.net. Readings are time- stamped as they are taken. Datasets can be stored manually (using the (+) button), or automatically using the Auto Log mode (pg. 5).

Standard models store up to 2,500 datasets in one batch.

selected battery type. No damage will occur if the wrong battery type is selected.

DeFelsko recommends the use of eneloop (NiMH) rechargeable batteries. It may take as long as 12 hours to charge dead batteries.

NOTE:

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The PosiTector DPM can automatically display and record datasets at user selected time intervals. When selected, the Auto Log icon will appear on the display, with a countdown timer until the next dataset is stored. Connect the instrument to a USB power source for long-term use.

Auto Log Mode

Auto Log

Standard models remain powered-up while in auto log mode.

The instrument will take readings for 40-50 hours on a set of fresh alkaline batteries, depending on the frequency of measurements.

Advanced models power down between readings to conserve

batteries. At each interval, the instrument will wake up, take a reading, sync to PosiTector.net (if configured) and power down. The instrument can record approximately 8,000 datasets while in this mode using fresh alkaline batteries, or approximately one reading every hour for eight months.

-Auto Log continues recording until memory is full, the instrument loses power, or the user turns off Auto Log mode. Stored datasets will remain in memory.

-To conserve battery life, readings update only at the Log Interval. The last recorded readings will remain “frozen” on the display until the next dataset has been stored.

-It is recommended that fresh alkaline batteries, or newly recharged batteries be installed prior to an extended Auto Log.

NOTES:

Turn on instrument/ Cancel Auto Log mode

Scroll through display modes

(Advanced only)

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When connected, power is supplied through the USB cable. The batteries are not used and the body will not automatically power down. If rechargeable (NiMH) batteries are installed, the instrument will trickle charge the batteries.

Auto SYNC

Allows the instrument to automatically synchronize with PosiTector.net when initially connected (USB or Bluetooth) to an internet connected PC running PosiTector Desktop Manager.

Additional measurements added to memory while connected are synchronized only when the USB cable is disconnected, then reconnected or when Connect>Sync Now is selected.

Immediately initiates synchronization with PosiTector.net when connected (USB or Bluetooth) to an internet connected PC running PosiTector Desktop Manager (PDM).

Sync Now

Connect

Connect Menu

The PosiTector uses a USB mass storage device class which provides a simple interface to retrieve data in a manner similar to USB flash drives, cameras or digital audio players.

USB Drive

NOTE:

Outputting Stored Datasets

The PosiTector DPM can record datasets in memory for printing, transfer to a computer or synchronizing with PosiTector.net.

USB mass storage - connect your PosiTector to a PC/Mac using the suppled USB cable to access and print stored readings and

graphs. No software or internet connection required.

PosiTector.net - a free web-based application offering secure centralized storage of datasets. Access your readings from any web connected device. See: www.PosiTector.net

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Returning for Service

Before returning the instrument for service…

1.Install new batteries in the proper alignment as shown within battery compartment.

2.Examine the surface temperature probe tip for dirt or damage.

3.Ensure the holes in the white humidity/air temperature sensor are clear.

4.Perform a Reset (Page 4)

If you must return the instrument for service, please fill out and include the service form located at www.defelsko.com/support with the instrument.

To ensure optimal performance of your PosiTector DPM, do not obstruct the airflow near the air temperature and humidity sensors. Keep fingers away from the sensor, as body heat can cause incorrect readings. Allow time for the instrument to acclimate and for the readings to stabilize when moving the instrument between different environments.

When using the surface temperature probe, do not use excessive downward force, and do not drag it sideways. When the instrument is not in use, place the rubber cap over the surface temperature sensor to prevent damage.

CAUTION:

Updates

Determines if a software update is available for your instrument (must be connected to an internet connected PC with PosiTector Desktop Manager). See: www.defelsko.com/update

Allows the PosiTector to communicate wirelessly with the PosiTector Desktop Manager (PDM) or with the optional Bluetooth wireless printer.

Bluetooth

(Advanced models only)

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Limited Warranty, Sole Remedy and Limited

Liability

DeFelsko's sole warranty, remedy, and liability are the express limited warranty, remedy, and limited liability that are set forth on its website: www.defelsko.com/terms

Technical Data

Conforms to: ISO 8502-4, BS7079-B, ASTM D3276, US Navy

NSI 009-32, IMO PSPC, SSPC-PA 7 and others.

Range Accuracy Resolution

Surface Temperature

-40° to 80° C 80° to 190° C

-40° to 175° F 175° to 375° F

±0.5° C ±1.5° C ±1° F ±3° F

0.1° C

0.1° F

Air Temperature

-40° to 80° C

-40° to 175° F

±0.5° C

±1° F

0.1° C

0.1° F

Humidity

0 to 100% ±3 % 0.1 %

Operating Range

-40° C to +80° C

-40° F to +175° F

www.defelsko.com

DeFelsko and PosiTector are trademarks of DeFelsko Corporation registered in the U.S. and in other countries. Other brand or product names are trademarks or registered trademarks of their respective holders.

Every effort has been made to ensure that the information in this manual is accurate. DeFelsko is not responsible for printing or clerical errors.