Introduction

The DeltaLog2 program allows you to manage from your own PC all the minidatalogger functions in an easy and intuitive manner: you can set logging start and stop times and alarm thresholds, download data into the computer memory and view them either in table or graphic format, display, in real time, the measurements acquired by the instrument and save them on file, print data and export it in Excel® format, read the remaining battery charge… A password protects the instrument settings and prevents unauthorized modifications.

Starting from version 2.5 of the software, data downloaded by the instrument or recordered directly into the PC memory, are protected from tampering according to EN12830.

Any altering of the file content would turn the section of Deltalog2 software unreadable.

 



DELTALOG2 installation

To install the program, insert the Cd-Rom in its drive, select Start, Run, then type in D:\setup.exe (“D” indicates the Cd-Rom drive) and press OK.

Follow the on-screen instructions. During the installation procedure, the software licence agreement will be displayed: click on ACCEPT to accept the agreement terms and proceed with the installation. To add the program icon on your desktop, select “Shortcut on desktop” at the end of the setup.

On the same Cd-Rom there is a copy of the manual in PDF format, which can be read using Acrobat Reader® (this program can be downloaded free of charge from www.adobe.com/acrobat/ ).

 



Uninstall DELTALOG2

During the installation of the software, the “Uninstall DeltaLog2” command will be created in the DeltaOhm directory in the Start menu. Run it to uninstall the program and all its components.

 



Preliminaries – Starting DeltaLog2

Connect the instrument to a free serial port on your PC using the appropriate serial cable provided with the software.

Start the program by double-clicking on the desktop program icon, or select DeltaLog2 in the DeltaOhm directory in the Start menu.

Press the Connect key or select the “Instrument Connect” command: the program will automatically search the serial line to which the instrument is linked and will connect to it.

If the connection has succeeded, the following symbol will appear on the right side at the bottom of the page:

If the connection has failed, the following symbol will appear:

If the program is unable to connect to the instrument, see the Troubleshooting section in this manual.

 



Definition of functional areas

After the data has been downloaded, DeltaLog2 will appear as shown in the figure below:

The following functional areas can be identified:

1. Main menu
2. Commands bar
3. Downloaded reports information display area
4. Data display area
5. Current report data summary display area
6. Serial port connection status

 



1. Main menu

The main menu appears at the top of the window. It enables you to access all the functions offered by the DeltaLog2 program.

To activate a function, open the pop-up menu related to the desired function and select it with the mouse.

The various commands available are listed below; for further information regarding their use, see the following paragraphs, where the main functions are described in detail.

 

 



A) File Menu

Open It opens a File.

Save It saves the File in the directory where it already is.

Save As… It saves the File in the desired directory.

Export to Excel It opens Microsoft Excel and exports data currently active to an Excel directory. In order for this function to be active, Microsoft Excel must have already been installed on your PC. Up to 30000 samples per time can be exported: for lager quantities, you will be asked which data block you wish to export.

Export as formatted text It exports current report data to a text file, separated by ";". This file can be easily imported from other applications.

Close It closes a previously opened file.

Print… It prints the current report and, more precisely, the data displayed in the “Data Display Area” and in the “Current Report Data Summary Display Area”. Any comments entered by the user through the menu item “ToolViewEdit Comments” are also printed.

Printer Setup… It opens the panel for printer setup settings.

Print Graph Setting If the printed graph dimensions are not the same as the displayed ones, it's possible to manually set the width and length of graph. The two squares length and width can be modified by the user selecting the CUSTOM name.

 

Exit It closes the program.

 



B) Instrument Menu

Connect It connects the DeltaLog2 program to the instrument and sets the serial port parameters automatically.

Disconnect It disconnects the DeltaLog2 program from the instrument, and enables the use of the serial port for other programs.

Inst. Info (Information about the instrument) It opens a window containing the information concerning the instrument connected to the program.

Read Temp/Hum. (Temperature/Humidity Reading) It starts the function used to view on the PC monitor the measurements read by the minidatalogger in real time.

Start Recording It starts data logging on the minidatalogger.

Stop Recording It stops data logging on the minidatalogger.

Dump data It transfers to the PC the data the instrument has stored while operating. A window will appear showing the progress of the download and the number of logged records. This window will also allow you to interrupt the download operation.

New session It deletes the data downloaded to the PC and opens a new measuring session. You will initially be asked whether you wish to save the measurements in a file. When in “endless loop memory” mode, this command does not delete data from the PC’s hard disk but only from the screen, as they are automatically saved while downloading.

Instr.Setup (Configuration of the instrument) It opens the window for configuration of the instrument connected to the PC.

 

 



C) View Menu

Graph It displays the selected data file in graph format. If a graph is already available, it refreshes it: this function is useful to bring the window to its start condition rapidly.

Table It switches from graph to table format.

Instrument bar It activates or deactivates the instrument bar

Status bar It activates or deactivates the status bar

 

 



D) Tool Menu


Copy to Clipboard
This command copies the current window into Windows clipboard, both as graph and as table and allows to paste it in another program as an image.
After selecting Copy to Clipboard, open the allocation program (editor, spreadsheet, graphics program, ...) and use the Paste command (or Paste Special, if available) to paste the clipboard content.

Set limits It opens a window that allows you to set an alarm lower limit and upper limit for each channel of the instrument. This option is particularly useful for faster analysis of the data when you are looking for any exceeded alarm limits.

 

View Limits It activates the display of the alarm limits. This function operates on a single graph at a time: to select a channel, click on the line corresponding to that channel in the Current Report Data Summary Display Area.

Calc Avg (Calculate average value) It calculates the average value of a group of data selected in a table. To select a group of contiguous data, click on the first datum and, holding the Shift key down, click on the last datum. To select a group of non-contiguous data, click on the data to be selected holding the Ctrl key down.

View/Edit Comments It opens a window where you can view, edit or add personal comments to the file containing downloaded data. These comments will be printed along with the data and, more precisely, together with the information summary.

Change channel description It opens a window where you can change the channel description that appears on the display.

Zoom + It magnifies a previously selected area of the graph. To select the area to be magnified, press the left-hand mouse button and slide the cursor over the graph. When you have selected the area, use the Zoom+ command (or the Apply Zoom key) to magnify.

Zoom - Returns to standard view.

Filter setup… It opens the data filter setup window when the table format display is active.

Filter apply It applies the filter to the current data displayed in table format.

 

 



E) Virtual Memory Menu

Instrument manager (File management on PC) Function used to manage data related to the registered minidataloggers and to the files saved on PC in endless loop memory mode.

Split & Archive Dynamic Record File It allows you to file data downloaded while the instrument is in endless loop memory mode.

Sort data It reorganizes the groups of data downloaded while the instrument is in endless loop memory mode, according to the date, (time, day, week, month, year) or according to the logging session.

View Overrun Info When the instrument is in endless loop memory mode, this command summarizes the time intervals when the new data, stored in the minidatalogger’s memory, have overrun the old ones.

 

 



F) Options Menu

Port settings (Serial Port Configuration) It opens the window used to set or view the serial communication port parameters. This function is active only when no instrument is connected. Selecting “Autodetect”, the program sets the port parameters automatically.

Lock Program This function locks the “Setup Instrument” item for minidatalogger configuration but leaves all the other functions of the program active. It is useful to prevent other people modifying the minidatalogger settings without authorization. A password is required to unlock the program.

The dafault password is "deltaohm".

Unlock Program It completely restores the functionality of the program by entering the password.

The dafault password is "deltaohm".

Modify Prog. Password (Modify program password)This command enables you to change the current password of the program. You will be asked to enter the current password: if your entry is correct, a window will open where you can enter the new password. For security reasons the password has to be typed twice in the two available boxes. Warning: the password must be typed exactly as it was first written, respecting capital and small letters.

Enable emergency dump When the instrument is in endless loop memory mode and you start downloading data, only data logged in the last session will be downloaded. In particular cases (for example if the previous data have been unintentionally deleted or spoiled) it might be necessary to download the entire contents of the memory. In this case emergency dump has to be enabled, keeping in mind, however, that this operation might overrun other data already present in the PC, which might therefore be lost.

Calibration It starts the calibration of the relative humidity probe on models HD206-2 and HD226-2. This item is disabled if the program setup lock has been entered by means of the Lock Program command.

 



G) ? Menu (Help)

DeltaLog2 Info Information regarding the software version

DeltaLog2 License Software licence agreement with the end user.

DeltaLog2 Handbook (User’s Manual) DeltaLog2 software user’s manual.

 

 



2. Toolbar

In order to speed-up the use of the system, some operations accessible through the menus are available also on the toolbar placed immediately below the main menu (series of buttons).

File/Open It opens a file of previously saved data.

File/Save as… It saves data downloaded from the instrument.

Instrument/New Session It starts a new session and deletes the data downloaded to the PC: before closing, you will be asked if you wish to save the data. It does not clear the minidatalogger’s memory: to do it, use the “Clear Memory Now” command in the instrument setup .

Instrument/Connect It starts the connection of the instrument to the PC. The serial port settings are established automatically by the program and no operator’s action is required.

Instrument/Disconnect It disconnects the instrument at the end of the work session. This command leaves the serial port available for other applications.

Instrument/Read Instrument It reads the measurements taken by the instruments and displays them on the PC screen – see related paragraph .

Instrument/Dump data It starts data download from minidatalogger to PC.

Instrument/Start Recording It starts data recording.

Instrument/Stop Recording It stops data recording.

Instrument/Instr.Setup (Instrument/Instrument setup) It opens the instrument setup window.

View/Table It displays the downloaded data in table format.

Tool/Filter setup It opens the data filter setup window when table format display is active.

Tool/Filter apply It applies the filter to current data displayed in table format.

View/Graph It displays the selected data file in graph format. To select a block of data, click on the corresponding name in the Report List Area.

Tool/View Limit It displays on the graph the limits set through the ToolSet Limit command. The command is active when one channel only is displayed.

Tool/Zoom + It enlarges an area of the graph.

Tool/Zoom - It reduces an area of the graph.

File/Export to Excel It opens Excel and sends current data to it. This function is active when the data is displayed in graph format. To be active, this function requires Microsoft Excel to be installed on your PC.

Tool >> Copy to Clipboard
The command copies into Windows clipboard the current window displayed as graph or table and allows to paste it into another program as an image.

View/Edit comments It opens a window where you can view, edit or add personal comments to the file containing downloaded data. These comments will be printed along with the data and, more precisely, together with the information summary.

Tool/Calc Avg (Tool/Calculate average) It calculates the average value of data selected in a table. To select a group of contiguous data, click on the first datum and, holding the Shift key down, click on the last datum. To select a group of non-contiguous data, use “Ctrl” instead of “Shift”.

File/Print It prints the current data as they are displayed (table or graph). You will be asked to enter a title for the print.

Option/Unlock Program It unlocks the setup functions of the DeltaLog2 program by entering the password.

Option/Lock Program It locks the setup functions of the DeltaLog2 program. To unlock them, use the Unlock Program command.

 

 



3. Downloaded Reports Information Display Area

It shows the logging start and stop date and the number of logged samples for each report.

 

 



4. Data Display Area

This is the area where the values of logged samples for the currently selected report are displayed.

The values related to each sample concern: acquisition date (in year – month – day format) and time (in hour – minutes – seconds format), as well as the values of the different channels with the corresponding unit of measurement.

 

 



5. Current Report Data Summary Display Area

This is the area where summary information for each channel of the currently selected report is displayed.

The following information appears for each channel:

·        Description
·        Sampling Time
·        Maximum Value
·        Minimum Value
·        Average Value
·        Type of sensor
·        Other parameters

 

 



6. Serial Port Connection Status

This is the symbol that indicates the status and connection parameters of DeltaLog2 with the serial port.

Depending on the connection status, the symbol can take the following values:

DeltaLog2 not connected with the serial port.

DeltaLog2 not connected with the serial port because an error occurred while connecting.

DeltaLog2 is properly connected with related parameters.

 

 



Instrument Setup

With the instrument connected, press the Setup key to open the parameter setting window.

The window is composed of 5 cards:

Current Settings: it shows the current instrument settings – this card cannot be modified by the user.

Info: it provides information concerning the instrument: the user can enter a name in the user code box that helps him identify the instrument.

Date - Time: the upper part of the card (identified by Date - Time) is used to update, if necessary, the instrument date and time; if you select “Update instrument Date-Time to PC Date-Time” the instrument date and time will automatically be updated to the PC date and time.

Sample time represents the interval between two successive loggings (sampling interval) and can be chosen in the range between 1 second and 1 hour.

Start Mode: it indicates in which mode logging will start; if you select Manual mode, logging will start when the operator presses the LOG key (or LOGGING key, depending on the model) on the instrument. If you select Start Mode=Date, the Start Date-Time (delayed start) and Stop Date-Time boxes (logging delayed stop) will become active: here you can enter logging start and stop date and time.

Anyhow, you can start and stop logging from PC in both cases.

Alarms: it manages the alarms of each channel. Selecting the different items, related alarms are enabled and you can enter the maximum and minimum values, or both of them, in the dialog boxes. Each channel can be enabled independently of the other.

The rest of the card shows the current status of the alarms: the red LED on shows the alarm limits that have been exceeded: if you press the Reset key the corresponding alarm will be cleared.

Battery level indicates the battery charge level: if the red LED is on the battery should be replaced as soon as possible.

Option: the card is divided into six areas:

1) Memory: A) Endless loop mode activates the continuous memory function (see below the detailed description of this function). B) Clear memory now is the button used to clear the instrument memory content. When you press this button, you will be asked to confirm the operation: press YES to continue or NO to cancel.

2) Select channel to store: used to select the channel or channels to be memorized. If no change is made, the current setting will be held (visible in the first card “Current settings”)

3) Select Unit measurement: used to select the unit of measurement for the temperature between °C and °F.

4) Display: used to select the instrument channel to be displayed: the first only, the second only or both of them alternately.

5) Lock keyboard: the instrument keyboard can be locked to prevent other non-authorized people changing the instrument operation. The lock can be: partial (partial lock: start button free) – only the start logging function is accessible; or total (total lock) – all the keys are locked and all operations can be managed from PC only.

6) Custom settings: it stores (save settings) and recalls (load settings) an instrument setting.

Press APPLY ALL to confirm the settings or Cancel to cancel the operation.

 

 



Reading Measurements in Real Time on a PC

With the instrument connected to the PC, press Read Instrument to read on the PC monitor the measurements detected by the minidatalogger in real time. The sampling time is automatically set at 1 second. The following window will appear:

1) Measurement registered by the two input channels of the instrument

2) Graph of the two channels. The vertical yellow lines represent the storage interval activated through the “Store Data On File” command at the bottom of the window.

3) Alarm current status. The red LED turns on when the limit is exceeded. Press the Reset key to clear it.

4) Alarm history: it records all the alarms occurred since this window was opened.

5) Select “Enable Storing” to store the measurements registered by the two channels. If you disable it or quit the function, you will be asked if you wish to save the data in a file.

 

 



Logging start and stop

After setting the setup parameters (sampling interval, channels to be stored,…) press the “Start Recording” key to start with immediate logging. Recording will start immediately regardless of the type of Start Mode selected in the Setup.

Press “Disconnect“ to disconnect the instrument, then disconnect the serial cable.

To stop logging, connect the serial cable, start the DeltaLog2 program, connect the instrument and press the Stop Recording key. N.B.: if the keyboard has not been locked during setup, logging can be stopped by pressing the LOG key on the instrument.

 

 



Data dump

To download data contained in the minidatalogger’s memory, connect the serial cable to the PC, start the DeltaLog2 program, then connect the instrument (Connect key).

Press the “Dump data on PC” key. When the data have been downloaded, they will be shown in table format.

Press the Disconnect key to disconnect the instrument. Disconnect the serial cable.

 



Data Display in Graph or Table Format

The contents of the minidatalogger’s memory can be viewed in graph or table format. The window on the left side (Report List) shows the groups of data corresponding to the different logging sessions, with the logging start and stop date and the number of samples. To select a group of data, click the name in the report list with the left button of the mouse.

 



Data Display in Table Format

The table display shows the list of measurements registered by the instrument, together with the date and time.

A filter can be applied on these data, to extract from all the data a subgroup according to the value of an upper threshold, a lower threshold or the overlay of both of them. The filter can be applied to one of the two channels or to both: in the latter case, only the groups that satisfy both conditions simultaneously will be shown.

After setting a filter using the “Filter setup…” command, apply it by using the “Filter apply” command: a window similar to the one shown below will appear.

The filter setup is shown at the top of the window, while a summary of the groups of data that satisfy the set limits appears below. The largest group of data, the smallest one and the total number of groups are given. The key at the bottom, “Go to interval”, takes you directly to each interval in the list. When a filter is applied, the different groups are separated from each other by dashes, as shown below.

 

 



Data Display in Graph Format

Each group of measurements can be displayed in graph format through the ViewGraph command or the related key. As well as displaying the graph of both channels, the program enables you to view the graph of each channel separately. To get it, just select the desired channel by clicking with the mouse on the “Current Report Data Summary Display Area”.

To go back to the display of all the channels, press the View Graph key again.

The "overrun event" item displays on the graph the points where overruns have occurred.

By pressing the right-hand button of the mouse you can activate a menu with some useful commands:

Point marks display of sampling instants.

Axis: it applies a dotted grid on the graph.

Graph Time Format: set the variable to display in the graph abscissa which can be: date and time, only date or only time.

Zoom functions to enlarge a graph area.

Fit functions (Fit…) that allow you to adapt the graph in order to cover the entire height (Height), width (Width) or window (Page) available.

 

 



Endless Memory

It is a logging mode that exploits the power of the PC’s hard disk to store huge quantities of data. This function is activated in the Option card under "Setup Instrument".

After setting the logging interval and selecting “Endless loop memory”, start logging. Before the instrument’s memory gets full and without stopping logging, the contents of the memory can be downloaded: DeltaLog2 will link the newly downloaded data together with those already loaded on the PC from previous loggings. To ensure that everything works properly, when you first connect the program will ask you to register the minidatalogger so that it will be identified every time that it is connected again to the same PC. Answer YES when you are asked to register.

In order to log the data according to EN12830, it is necessary to fill in the "Location" field by indicating where the instrument is going to be placed for recording.This information will be reported in the downloaded data.

In the next screen, click the Register Instr. key: the new minidatalogger will be added to the list of the instruments registered on that PC. Close Instrument Manager by clicking on the Close button.

If the endless loop memory function has been activated and a too long time has elapsed, the latest data will overrun the old data: in this case, when downloading data again, the program will signal an “overrun” indicating the date and duration of this overrun. In the latter case, there will be a “hole” in the initial data of the last logging.

N.B.: to guarantee data continuity, once the endless loop memory function has been activated it should not be deactivated.

This type of logging works much like a chart recorder. The minidatalogger’s memory can be compared to a complete turn of the paper roll. If logging starts at Ti1, to avoid losing useful data it is sufficient to download data before Ti1 goes beyond T0, as you can see in the drawing on the left at the point indicated by pen no. 1. If, on the contrary, initial instant Ti2 goes beyond To, as in case 2, the data contained in the darker rectangle from Ti2 to To will be overwritten and it will be impossible to recover them. Every time that data is downloaded, the entire memory will be available again for new loggings, as if a new roll of paper were mounted on the chart recorder.

Step-by-step procedure (the first 5 steps have to be made only the first time):

1) Start DeltaLog2.

2) Connect the minidatalogger’s serial cable to the PC’s serial port.

3) Connect the minidatalogger to the PC by pressing the Connect button on the DeltaLog2 command bar. If it is the first time that you carry out this operation, you need to register the new instrument as explained above.

4) Press Instrument Setup to access the Setup page and set the sampling interval (Sample time), the Start Mode, the required alarms (clear previous alarms by pressing the Reset button found next to each LED); then select “Endless Loop” memory and confirm by clicking on Apply All.
If you set a stop date that is prior to the start date, the instrument will continue to log data and, when no more space is available, it will overrun the old data. If, on the contrary, the stop date is subsequent to the start date, the instrument will stop logging when that date is reached.

5) Disconnect the instrument after you have started logging using the Start Recording key; Logging can also be started in automatic mode with the date or manually using the LOG key on the instrument’s keyboard.

6) Before the memory is completely full, and without stopping logging, reconnect the instrument. Start downloading the data (Dump Data on PC): a window will appear asking whether you wish to download the new measurements only. Press OK to confirm.

7) The data will be downloaded and displayed in table format after having been processed. The user will be informed of any Overruns.

8) If you wish to go on logging, just disconnect the instrument (Disconnect button) without stopping logging.

9) Disconnect the serial cable.

When connecting next time, repeat the above steps starting from point 6.

The quantity of available memory varies according to the chosen sampling interval and number of channels to be memorized: the Time - Date setup card shows the remaining memory space. Keep in mind that, in endless loop mode, after each data download the entire memory of the minidatalogger is available again.

There are cases when it is important to monitor a variable, and only if this variable has exceeded the set limit its temporal trend during the last logging period will have to be checked. Suppose that, for example, you need to monitor the temperature of a fridge and that the limit is set at -15°C. The instrument will go on monitoring the temperature; if an alarm occurs, you will check when this alarm was triggered and how the temperature has changed in the meantime. You will then download the data to find out what happened. On the contrary, i.e. if no alarm occurs, the instrument will continue to log the data. Since the minidatalogger’s memory is organized in a cyclic pattern, it is not necessary to delete old data to have free space in the memory as the latest data cyclically replace the old ones.

To set the minidatalogger to this operating mode, proceed as described in the paragraph for the step-by-step procedure above, replacing step 6 with the following one:

6) When an alarm occurs – signalled on the screen by an arrow indicating ALRM or by the lighting up of the red flashing LED – start the DeltaLog2 program. Connect the minidatalogger to the PC via the serial cable and press the Connect button.

Start downloading data (Dump Data on PC): a window will appear asking you whether you wish to download the new measurements only. Press OK to confirm.

Before disconnecting the instrument, clear the alarm signals in the Alarms directory under Setup Instrument.

 

 



Data archive

When you download data to the PC using the endless loop memory function, the latest data are queued to those already present in the PC’s memory and represent a single group of consecutive measuring sessions: this group of measurements, which appears in the Report List, is called "Dynamic Report File" and is referred to as DRF. For instance, a group may be composed of the seven daily measurements taken in a museum in the course of a week. When this block of measurements has been completed, the group of data can be conveniently stored, so that it will no longer appear in the Report List every time a new download is made. All the data stored in a PC can be called up to be viewed and, if necessary, deleted.
Data downloaded during an endless loop memory session are reorganized by groups using the Sort Data command: each group of data will be composed of measurements taken within the same hour, on the same day, in the same week, month or year, or according to the download date.

To be archived, a group of measurements must form a complete block. If, for instance, the data are sorted based on the day (By Day), the "Split & Archive data" function will be enabled only if the data cover at least a whole day. Moreover, only completed intervals will be filed: in case of one day and a half of measurements, only the complete day will be filed. The rest will continue to appear in the Report List until the next storage or until the final storage, which is obtained using the Instrument Manager command "Close DRF & Archive". Sorting based on the download date (Sort Data By Download Date) is complete by itself, and therefore it will always be fully filed. After two complete downloads of the minidatalogger’s memory, you will be asked to archive data before proceeding with a new download to avoid working with oversize files. The same thing happens when modifications have been made to the instrument settings between a download and the next one: since the two groups of data are not compatible with each other, it is necessary to file the old ones before downloading the new ones.

The “Split & Archive dynamic record file” command calls up the following window:

In addition to the instrument parameters, it shows the storing options:

Date Time: current date and time.
Storing Interval: data sorting criteria.
Create new Archive: select it to enter the name of the new archive Archive Name.
Add to existing Archive: it allows you to select an existing data archive among those listed in the pop-up window.
Note: additional notes can be entered here. Stored data can be recalled using the "Instrument Archive" command in Instrument Manager.

 

 



Instrument manager

 

The Instrument Manager function enables management of the data files stored in the PC when the “endless loop memory” function is active. When connecting for the first time the instrument has to be registered: all the registered instruments are listed in the "Instrument List" window. The commands located in the lower part of the window are applied to the instrument highlighted at that moment: to select it, click on the description line in the "Instrument List". The data pertaining to the currently highlighted instrument are shown on the left side, while the Instrument Manager commands are grouped on the right-hand side.

Register Instrument: used to register the instrument currently connected to the PC.

Delete Instrument: used to delete the selected instrument and all the files connected to it.

Load DRF: used to call up the list of data blocks previously downloaded to the PC up to the last filing. Data stored using the "Split & Archive data" command no longer appear in the "Report List" but can be called up using the "Instrument Archive" command at the bottom.

Close DRF & Archive: used to close the DRF file and archive it definitively. Compared to the "Split & Archive data" command, it also archives incomplete blocks of data. No additional blocks of data can be queued to this kind of archive

Instrument Archive: used to open the management window for the active instrument’s archives.

The selected archive can be opened (Open) to be either viewed or definitively deleted (Delete).

 

 



Troubleshooting

1) Connection failure

If the program is unable to connect, proceed as follows:

2) Print Problems

If there are any problems during the print procedure, try to upgrade the printer driver by downloading it from the manufacturer's Web site.
Modify the dimensions of printed image selecting File >> Print Graph Setting.
Use the Copy to clipboard function to copy the active window and paste it in another application: for example, to print a graph, copy and paste it in Windows Paint and try to print it from there.

3) Battery replacement

After the replacement of the battery, the keyboard of the instrument is unable to be used in order to avoid that the starting of a new storage can cancel any data already stored.
Follow these instructions:

 



Calibration of the Relative Humidity Probe
(HD206-2 and HD226-2 only)

On minidatalogger models HD206-2 and HD226-2, operating with a combined external probe, the user can calibrate the humidity probe. To calibrate the probes properly, it is important to know and observe the laws of physics that govern the measuring process. We therefore recommend that you carefully follow the instructions provided below and that you carry out new calibrations only if you possess the necessary technical knowledge. Before starting the calibration procedure, you should check, with the help of 33%RH and 75.4%RH saturated solutions, whether a new calibration is indeed necessary: the probe should be re-calibrated only if a measurement error is detected at one of these two points. This calibration procedure deletes previous calibration data. To calibrate the probe properly, the first point must be at 75%RH and the second at 33%RH. To carry out an accurate calibration it is very important that the probe and saturated solutions be at the same temperature, and that this is as stable as possible throughout the calibration procedure. The entire calibration procedure is protected by the program password (Lock Program) as well as a second password specific for this function, which you will be asked to enter when starting the procedure. While the first password can be changed by the user of the program, the second one is fixed and cannot be modified.

Calibration sequence:

1. Switch on the minidatalogger, connect the combined temperature/humidity probe to the external connector.

2. Open the back panel of the minidatalogger by unscrewing the four screws in the rear cover.

3. Connect the HD206/54 serial cable to the internal connector as explained in the paragraph titled "When to use the internal connector" in the "Connecting to a PC" chapter on page 21 of this manual.

4. Start the DeltaLog2 program and connect the instrument using the "Connect" button.

5. If the instrument settings are protected by password (Lock Program), you need to unlock the program before proceeding.

6. Click on “Calibration” in the Option Menu:

7. Enter the CAL password (capital letters) and confirm. Select RH and confirm by clicking on OK. In the next window, select the first calibration point at 75%RH and click on OK. The following window will appear. Warning: do not confirm immediately.

8. Loosen the sensor protection at the top of the probe.

9. Replace it with the perforated cap (screw it down carefully) and its threaded ring nut (they come in different sizes depending on the type of probe).

10. Open the cap on the 75%RH saturated solution.

11. Make sure that there are no drops of solution inside the measuring chamber: if there are, wipe them off with a paper towel.

12. Insert the probe in the container, making sure that the cap with the probe is properly fitted. The measuring chamber must be perfectly sealed, otherwise it won’t reach saturation: no external air must be allowed to penetrate inside the chamber.

13. Wait at least 30 minutes.

14. When this time has elapsed you can click on OK to confirm: after a few seconds you will be asked to enter the humidity value actually applied. This value is the one shown in the table on the label of the container of saturated solution, corresponding to the temperature provided by the program.
In the example below, to the 22.3°C temperature provided by the program corresponds a relative humidity of approximately 75.3%: this is the value to be entered.

15. Select 33%RH in the next window.

16. Remove the probe from the container with the 75%RH solution, replace the cap on the container, open the container with the 33%RH saturated solution. Make sure that there are no drops of solution inside the measuring chamber: if there are, wipe them off with a paper towel.


17. Insert the probe in the container, making sure that the cap with the probe is properly fitted. The measuring chamber must be perfectly sealed otherwise it won’t reach saturation.

18. Wait at least 30 minutes, then click on OK to confirm.

19. In the next window, enter the humidity value actually applied and click on OK to confirm.

20. Remove the probe from the container with the 33%RH solution, then replace the cap on the container.


21. Unscrew the ring nut with the cap and replace it with the sensor protection. Calibration is now completed.


Important Notes:

1. Do not touch the RH sensor with your hands.

2. The base of the sensor is made of alumina,therefore it can break easily.

3. During the entire calibration procedure, operate at constant temperature as much as possible. Plastic materials are usually poor heat conductors, therefore it takes time for them to reach thermal equilibrium.

4.If no satisfactory results are obtained, make sure that:
- the sensor is not faulty or corroded
- during the calibration procedure the measuring chamber is closed tight
- the saturated solutions are not exhausted. A 33%RH saturated solution is exhausted when inside it, between the two walls, there is no more salt but only a thick liquid: in this case the chamber can no longer reach saturation. For the 75%RH saturated solutions, make sure that the salt is not dry (crystallized): in order to reach saturation the salt must be damp.


5. Storage of saturated solutions: saturated solutions must be stored in the dark at a constant temperature of approx. 20°C, with the container tightly closed and in a dry room.


 

 

15102002