Omega OM-70 Series User manual

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OM-70 SERIES
Data Logger Interface Software
Extended Warranty
Program
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User’s Guide

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It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

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Table of Contents
Quick Start.................................................................................................................................................................1
Connecting the Logger to Your PC ...........................................................................................................................1
Setting Up the Logger To Record Data.....................................................................................................................1
Custom Interval Setup ...............................................................................................................................................3
Alarm Setup...............................................................................................................................................................3
Using the Software to Check Logger Status..............................................................................................................4
General Logger Status and Data In Memory Pane ................................................................................................4
Alarm Status Pane .................................................................................................................................................5
Last Sample Pane...................................................................................................................................................6
Ending the Logging Session......................................................................................................................................6
Loading Logger Data.................................................................................................................................................6
Automatic Data Retrieval ..........................................................................................................................................6
Working the Data Graph............................................................................................................................................7
Using the Zoom Feature ............................................................................................................................................8
Data Listing Window.................................................................................................................................................9
Data Summary and Statistics.....................................................................................................................................9
Exporting Logger Data ............................................................................................................................................11
Printing the Logger Data .........................................................................................................................................12
Calibrating the Logger.............................................................................................................................................12
Setting the Calibration Password.............................................................................................................................13
Setting the Logger Clock.........................................................................................................................................14
Specifications...........................................................................................................................................................15
OM-70 Family of Loggers.......................................................................................................................................17
OM-74 Warning ......................................................................................................................................................17
Turning the Loggers On and Off .............................................................................................................................17
Logger Display and Buttons....................................................................................................................................18
Setting the OM-74 Thermocouple Type..................................................................................................................18
Checking the Thermocouple Type Connected to the OM-74..................................................................................19
Replacing the Logger Battery..................................................................................................................................19
OM-71, OM-72 and OM-73 Specifications.............................................................................................................21
OM-74 Thermocouple Logger Specifications .........................................................................................................22
Thermocouple Temperature Range and Accuracy...............................................................................................23

1
Quick Start
Follow the procedure below to quickly start using your logging device:
1. Connect the data logger to a free USB port on your computer.
2. Start the Interface Software on your PC.
3. From the Logger menu, select Setup.
4. Select the "Logging starts immediately when setup is complete" option.
5. Click Continue to start logging.
After the Continue button is pressed, the device will start logging. You can click on the icon on the toolbar to
download and view the logged data.
Connecting the Logger to Your PC
To connect the logger to your computer, follow these steps:
1. Connect the USB cable to the logger and to a free USB port on your computer.
2. If you are connecting the logger to the PC for the first time, the logger will automatically be recognized and
installed on your computer.
3. Start the Interface Program and click on the icon on the toolbar.
The logger status screen should now be displayed.
Note: The Windows operating system can not handle USB devices being unplugged and plugged back too fast.
When unplugging the logger, wait for about 5 seconds before plugging it in again. If you unplug and plug back a
device too quickly, the computer may stop recognizing any USB devices on that port. If this happens you will have
to restart the computer. This is a Windows USB problem and is not related to the Interface Software.
If more then one logger is connected to your computer at the same time, the program will ask you to select one of
the loggers. To select a logger click on one of the loggers on the list, and click the Connect button.
Setting Up the Logger To Record Data
To set your logger to start recording data, click the button on the toolbar, or select Setup from the Logger
menu. To avoid accidentally erasing the logged data, the logger can not be setup to log while it is logging.
The setup options window is shown below.

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•Logger Information: Gives information about the logger. The type of logger, the internal serial number and
the deployment (how many times the logger was setup to log) are given. You can not change this information.
•Unit Description: This field is used to identify the logger to the user. You can enter any text you want here
such as descriptive location, serial number, etc.
•Sample Interval (Length of Recording): Select the sample interval from a predefined list of intervals.
•Custom Interval: If the interval you want is not on the list, you can set a custom interval using this button.
•Overwrite oldest samples when full: Check this box to have the logger continuously record data, overwriting
oldest recorded data. When this box is not checked, logging is stopped when the logger memory becomes full.
•How to Start Logging: Logging can start in three ways depending on the selection you make:
oLogging starts when the Start button is pushed: Logging will start when the Start button is pushed for
about 3 seconds.
oLogging starts immediately when setup is complete: Logging will start immediately once the Continue
button is clicked.
oLogging starts at this time: Logging will start at the user specified time. There is no limit how far in the
future you can set the logging to start.

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•Channels to Log: This option only appears if the device has more than one channel. You can elect to disable
unused logger channels. When a channel is disabled, its memory is allocated to the other channels, increasing
the total logging time. The total logging time will be reflected in the Sample Interval window. Depending on
the logger, some channels are required and cannot be disabled. Channels that can not be disabled are grayed out
and can not be unchecked. For instance, in the picture above, the Temperature channel is required to record
Relative Humidity, so the Temperature channel cannot be disabled. At least one channel must be enabled for
logging.
•Alarm Setup: Click this button to open the Alarm Setup Window.
Custom Interval Setup
Commonly used intervals are predefined in the Sample Interval box in the Logger Setup screen. A custom interval
can also be defined by the user. To do this, click on the Custom Interval button in the Logger Setup screen. The
custom interval window is shown below. You can select a custom logging interval using this window.
In the window above, the sampling interval was set to 1 minute, 20 seconds, to allow about 20 days of recording.
Alarm Setup
Alarms are used to indicate if the data inside the logger exceeded a user specified threshold. This can be an
indication that an important event has occurred. The logger will indicate that an alarm condition has occurred by
displaying the Alarm icon. Once an alarm condition has occurred, the alarm icon will remain turned On for the
duration of the logging session to indicated that data stored in the device memory has alarms in it.
To get to the Alarm Setup window, click the Alarm Setup button in the Logger Setup screen. The Alarm Setup
windows allows you to set high and/or low alarm thresholds for each data channel, or disable these alarms. Alarms
are set by entering the thresholds as shown in the window below.

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The checkbox to the left of the low/high alarms enables the alarm when checked, and disables the alarm when clear.
Using the Software to Check Logger Status
Selecting Status from the Logger menu brings up the Logger Status window. You can also bring up the status
window by pressing the button on the toolbar. The logger status screen is separated into three panes:
General Logger Status and Data In Memory Pane
Logger State shows the internal state of the logger:
oPower Save Mode: This mode is entered when the logger idle (not logging and not setup to log) for about
1 hour. The logger uses very little power in this mode and the battery can last for up to 10 years. The
logger's real time clock is not running in this mode.
oIdle, waiting for setup: The logger is not logging. It is waiting for a setup from the user. The logger's
real time clock is active in this mode.

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oLogging will start on button press: Logging has been configured to start when the logger's Start button is
pressed.
oLogging will start at xxxx: Delayed logging. Logging will start at the time specified.
oLogging in Progress: The logger is currently logging data.
•Serial Number: This internal serial number is unique for each logger.
•Deployment: Indicates the number of times the logger has been setup to log.
•Logger Time: Shows the internal logger date and time. Depending on how the time was entered, this may be
different from the Windows clock.
•Battery Level: Shows the current level of the logger's battery. It is recommended that the battery is replaced
when this indicator reaches yellow. When this indicator reaches red, logging becomes unreliable, and the
battery should be replaced before starting a new logging session.
•Logging Started At: Shows when logging was started.
•Logging Duration: Shows how long the logging session has been active.
•Sample Rate shows how often the logger is recording the data.
•Wrap around shows how many times the sample memory wrapped around after becoming full.
•Samples in Memory: Shows information on how many samples are currently stored in the logger memory, and
how much space remains free. Note that if data wrap around occurs, this value will always be 100%.
Alarm Status Pane
The Alarm Status pane displays the alarm thresholds for the active channels. If a high alarm occurred the threshold
is displayed in red. If a low alarm occurred, the threshold is displayed in blue.

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Last Sample Pane
The Last Sample pane shows the value of the last sample taken, for all the active channels. It also shows when the
next sample will be taken.
Ending the Logging Session
There are a number of ways that the logging session can end:
1. When the logger memory becomes full, and data rollover was not selected during logger setup, the logger
will automatically stop logging and enter the idle state.
2. Selecting End Logging from the Logger menu.
3. Logging will stop automatically if the logger detects a low battery condition.
4. If the battery is removed from the logger, logging will stop. No data will be lost.
Once logging has ended, it cannot be resumed without erasing the logged samples stored in the logger memory.
Loading Logger Data
To get the sampled data from your logger, connect the logger to your computer and click the button on the
toolbar. Once the data is transferred from the logger to your PC, the data graph and data listing windows will be
displayed.
The graph display will be blank if there are less than two data points logged. The listing window will be blank if
there are no data points logged (as can happen during delayed logging, or when logging is set to start on button
press).
Automatic Data Retrieval
The Interface Software can be setup to automatically load the data from the logger into the computer as samples
become available. In this mode the graph and the listing windows will be updated automatically with the new data.
This is how to enable the automatic data retrieval:
•Make sure that the logging device is connected to your computer.
•Make sure that the device is logging data. Automatic retrieval is not available when the logger is not logging.

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•Manually download the data for the first time by clicking the button on the toolbar, or select Get Data
from the Logger menu.
•From the Logger menu select Auto Data Load.
The computer will download data when new data is logged by the device. For instance, if you set your device to
collect data once every minute, the software will perform a download once a minute. Of course the device has to be
connected to your computer while the Auto Data Load mode is active.
When the Auto Data Load mode is active, the software does not change the zoom level of your graph. Instead it
scrolls the graph as new data becomes available.
Working the Data Graph
Clicking anywhere within the graph window activates the graph toolbar buttons and the graph window features.