ELOG automatically detects what type of instrument it is communicating with and adjusts the appropriate options accordingly. This makes setting up your equipment even easier. All of the options are fully user configurable and can be turned ON or OFF with just one click. Examples of each page of the Setup Table follow, including asking for connection diagrams and what a Setup Table List looks like.

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Communications capabilities can be explored with the Tool Bar including the LoggerList which is a listing of all loggers that are set up for Wired or Wireless communications.

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Real Time Display

After connecting the logger to a load, it is often useful to look at the parameters the logger is measuring to verify that the sensors have been installed and are operating correctly. Their are two types of Real-Time Data Display formats that you can choose; Text or Graph. Examples of both formats follow.

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Data Analysis

Once the data stored in the Logger has been retrieved to a PC, there are three options available:

1. The data may be opened for viewing
2. You can select a range of data
3. From this data you can create many different types of graphs and even export the data as a comma separated variable file (.CSV) for viewing or further analysis in other applications such as spreadsheets

A very useful way to get a quick summary of the data is to call up the Data File Summary. The Data File Summary opens Notepad and creates a new file that provides a snapshot of the data including; the measured parameters, the setup table and the logger itself.

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Harmonic Analysis & Waveform Capture

The buttons along the lower left side of the window select the Channel to be displayed. One channel may be viewed at a time. This screen includes a good deal of information. The voltage and current harmonics are presented graphically in the upper part of the window. The y-axis is scaled in percent of the fundamental. The x-axis is the harmonic. Both even and odd harmonics are shown.

The actual value of the voltage and current for each harmonic may be found in the Harmonic Values box. By clicking on the arrow buttons, higher or lower order harmonics may be selected. The Waveform Values box provides summary statistics for the overall current and voltage waveforms. This includes the RMS value, Total Harmonic Distortion (THD), Peak values, and Crest Factor.

Note: (image 1) The individual harmonic values and THD can be shown as a percentage of the fundamental (IEEE Standard 1035-1989) or as a percentage of the total RMS value (CSA and IEC standard). The number of harmonics shown can be out to the 64th place plus the DC component.

Note: (image 2) The image displayed shows a highly distorted (current) waveform from a computer power supply. These waveforms are typical for switching power supplies and are a major cause of line harmonics.

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Automatic Data Collection

One problem with having multiple sites is having to download all of the files from those sites. ELOG™ supports multiple remote data collection options: AutoPoll™ and AutoHost™.

AUTOPOLL: Unattended PC initiates calls to the loggers

AutoPoll is a Windows™ application that comes with ELOG2001. It allows you to have your PC perform automatic, scheduled data downloads from loggers that are connected to a modem. After the program is setup with the Logger List and Schedule, you can go home for the day knowing that your PC will do all the Data Collection for you. The cost to you? Nothing! AutoPoll is included with your software purchase. An example of the AutoPoll schedule window is below:

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AutoHost: Unattended Logger initiates calls to the PC

AutoHost is the second remote data collection package. It is very useful for loggers equipped with an internal or external modem. It enables you to setup the loggers to automatically call a host computer. In applications such as residential homes, it can be very beneficial to use the homeowner's existing phone line. This shared communication capability could save a project hundreds of thousands of dollars (it already has for some of our customers). The loggers can be scheduled to call an 800 (or other) number at times that the homeowners are not awake. The loggers will even automatically hang up if the phone is needed late at night. This feature will change the way remote data logging is done! The cost to you? Again, Nothing! It's included with your logger purchase.

ELITEpro and DATApro instruments with modems can be configured to automatically initiate telephone data retrieval sessions (AutoHost, short for Automatic PC Host), as well as answer calls from the PC (AutoPoll). The AutoHost configuration function in ELOG allows storing of a call-out schedule, task-list and telephone number for the logger to call. At the time(s) specified in the configuration table stored in the logger, the logger will call a host computer at the telephone number in its memory.

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The configuration table makes it easy to set-up automatic meter reading for your data loggers.

ELOG also supports preset alarms. Alarms are set-points configurable by the user. The user can set an alarm condition set-point (see the following example) as follows:

(e.g.. if the kW exceeds 40 kW or the Voltage drops below 112 Volts) for example, if the measured quantity exceeds 3.0 call the AutoHost computer and report an alarm condition. When an alarm condition occurs, whether it is a high or low condition, the logger records the condition into the logger's data and calls out to a computer setup with AutoHost. The logger then downloads an alarm report (see the following example) and performs a full data download of the data prior to the alarm condition. This will allow the user to analyze the condition leading up to the alarm. Invaluable information can be obtained for trouble-shooting a system using this information. An example of an alarm report follows:

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The possibilities for application of these software packages are limited only to your imagination. If you have any further questions feel free to contact us. We would be glad to help you automate your data collection.