Dwyer DL8 - Manual (Page 2)

If more than one logger icon appears on the screen or more
than one Open COM is highlighted on the Communicate
menu, this means you have more than one COM port avail-
able on your computer. Choose the port that the particular
logger is connected to.
The logger window will display the serial number of the log-
ger Trendreader software is communicating with. See
Figure 1. To contact another logger connected to the com-
pute. 1. Double-click the serial number displayed to high-
light it. 2. Type the serial number of the logger you want to
contact. 3. Click the Contact button.
Enabling and Disabling Channels
Enabling a channel activates that channel and it will contin-
ually record and store readings in memory. In the channel
ON column, Yes means the channel is active, No means it
is not. Click on the channel being changed to toggle
between yes and no. Disable any channels not required to
conserve memory space.
Equation Numbers
Equations are calculations the software uses to convert raw
logger data to understandable units. Refer to page one
(Table 1) for the appropriate equation number.
To see a list of standard equations available, double click
one of the equation numbers in the Eqn column. The Select
an Equation dialog box will appear, enabling you to scroll
through the standard equations. If you want to choose one
of the equations on the list, click it to highlight, and click
Accept (or Enter). You can also choose an equation by typ-
ing the number in the selected Equation Number box and
clicking Accept (or Enter).
Custom equations can be created and assigned to specific
logger channels. For additional information on creating cus-
tom equations, please refer to the instruction manual includ-
ed with the Trendreader software.
Calibrations
The calibration values displayed in the low, med, high
columns are factory set and match the sensor applied.
Viewing Realtime Readings
The realtime function allows the user to view measurements
as they are being recorded. Viewing current readings can
be useful when monitoring remote loggers by modem. In
realtime mode, the logger reads and displays the variable
every 8 seconds. If the sample rate is greater than 8-sec-
onds, the average value for the sample interval is stored
(based on 8-second readings).
Do not leave realtime running if you want to perform other
tasks in Trendreader or if you want to switch to another
Windows
™ application. The operation of Trendreader of
other Windows ™ program will be slowed considerably with
realtime running. To stop or start realtime, click the Edit
Setup button. Stopping realtime has no effect on the log-
ger’s information gathering.
Units of Measure
The units of measure can be changed to fit your particular
needs. To change the units displayed in Realtime and on the
logged data choose the Options menu, highlight the para-
meter being measured. The units appropriate for that par-
ticular parameter will be displayed in the units window.
Select the box corresponding to the desired units of mea-
sure and press Enter.
Filename
You cannot name the file during setup. Name the file when
you are backing up the logger.
Current Time
Make sure the current time is correct. To change the time,
access the Program manager on your computer and follow
instructions in your computer setup manual.
Stop When Full and Continuous Mode
The logger can be set to stop taking readings when the
memory is full, or to continue to take readings when the
memory is full. To choose the first option, click the box in
front of Stop When Full so that there is an “X” in it. To
choose the continuous mode, click the box in front of Stop
When Full so there is no “X” in it. The logger will continue to
take readings when the memory is full, discarding the old-
est reading as it records new readings.
Stopping Realtime
When the logger window is opened, the logger is operating
in realtime mode, which means current readings are being
displayed in the window. Before changing any settings, click
Edit Setup.
Clearing Stored Data
To empty stored data, click Clear Stored Data.
Figure 1
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