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XI. OPTIONAL DATA LOGGER

1. Description:

When enabled in the analyzer software, the data logger records the measured residual,

sample water temperature, turbidity, and pH value (if being measured) at a selectable frequency.
This data is recorded on the Micro SDHC memory card and can be retrieved using any text-reading
program. The Micro SDHC memory card is installed in the slot on the MB220 board as indicated on
Figure 11 of this manual. To use the data logger the controller must be provided with the MJ500 Real
Time Clock board (which mounts directly on the MB220 board as shown on Figure 11).

2. Operation:

To enable, enter the conﬁ guration menu on the residual analyzer control software and

select the option “DL”. The ﬁ rst menu option that appears will be the On/Oﬀ menu. The menus which
follow allow for adjustment of the data logger frequency and for changes to the clock (date and time).
See ﬁ gure 7.

Frequency

: The frequency is the time interval between data recordings. The frequency is

adjustable in seconds, with a minimum setting of 5 seconds.

Data Logger Clock

: The clock is factory-set before shipment. However, because the clock is set

on Eastern Standard time it may be necessary to change the date and time upon start-up.

3. Stored Data Files:

The data will be written to text ﬁ les on the Micro SDHC memory card. The

formatting and handling of these ﬁ les is as described below:

File Format:

The following is an example data ﬁ le to illustrate the format used. As you can see,

there is a three line header for each ﬁ le. The fourth and ﬁ fth lines are headers for the data. You
will see that each header and data entry is delimited by a comma.

File Name:

Each data ﬁ le will be named according to the date on which it was created. For

example if created on May 24, 2016, the ﬁ le name would be May24_16.txt

i. If the Micro SDHC memory card already has a ﬁ le started earlier on the same day, then data

will be written onto the existing ﬁ le.

ii. The text ﬁ les are limited to 5 MB. Once this limit has been reached, a new ﬁ le will

automatically be created to allow data to continue to be written.

Importing data into Excel:

The data ﬁ les can be imported into Excel as follows:

NOTE: This assumes use of Excel 2007 version.

i. Select the “Data” tab.

ii. Among the “Get External Data” tabs on the toolbar, select “From Text”

iii. A pop up window will appear allowing you to search for and select the data ﬁ le that you wish

to import. After you have selected the ﬁ le, click on “IMPORT”.

iv. Another pop up window “Text Import Wizard – Step 1 of 3” will then appear.

Here under “Original Data Type” you must select “Delimited”.

Lower down you are asked to select “Start import at row:___”. In order to eliminate the 3

line ﬁ le header, you can select “4” here to start the data import on row 4 of the ﬁ le.

Then click “Next”.

v. On the next pop up window “Text Import Wizard – Step 2 of 3” you need to select the type of

delimiter being used in the data ﬁ le. The data entries in these ﬁ les are delimited by commas
and so you must select “Comma”. After selecting Comma and only Comma, then click “Next”.

vi. On the next pop up window “Text Import Wizard – Step 3 of 3” you can accept the “Column

data format” setting of “General” and then click “Finish”.