Lascar EL-USB-ACT

• Compatible with a.c. and d.c. current clamps
• Energy monitoring mode (to calculate power, cumulative energy andcumulative cost)
• a.c. and d.c. millivolt measurement mode
• Immediate, delayed and push-to-start logging
• Supplied with user replaceable AA batteries (2) and Windows control software

AC and DC Millivolt Data Logger with Current Clamp Input

When used with a current clamp, this standalone data logger measures and stores up to 127,232 a.c. and d.c. current readings over a 0 to 1000 amp d.c. measurement range (0 to 723 amps for a.c.). In ‘energy monitoring’ mode, this data is converted into power, energy (using a user defined voltage value) and cost (using a user supplied energy unit cost). The millivolt measurement mode allows for direct measurement of voltage, up to 1V d.c. (700mV a.c.).

The user can easily set up the logger and view downloaded data by plugging the data logger into a PC’s USB port and using the supplied software. The software has provision for a clamp scaling factor (the clamp input-output ratio of amps to millivolts). Stored data can then be graphed, printed and exported to other applications. The high contrast LCD can show a variety of current, power, energy and cost information. At the touch of a button, the user can cycle between the most recent, maximum and minimum measurement values. The data logger is fitted with 2 replaceable AA batteries.

Ensure the connector(s) from your current clamp are pushed fully home into the 4mm sockets of the EL-USB-ACT. Note: some designs of 4mm plugs require a noticeably higher force to be applied during the last 5-10mm of travel during insertion.

Also be aware that it is normal for the logger to show a small spike in the reading when either connecting or disconnecting to the current clamp, although this should decay to close to zero after a few seconds. You may wish to make use of either the delayed start, or push to start modes in the software if you want to avoid this effect appearing in your logged data.

EL-WIN-USB (CONTROL SOFTWARE)

Lascar’s EasyLog USB control software is supplied free of charge with each data logger. Easy to install and use, the control software runs under Windows 2000, XP, Vista & 7. The software is used to set-up the data logger as well as download, graph and export data to Excel

The software allows the following parameters to be configured:

• Logger name (up to 16 characters)
• Measurement mode (current, energy, power or voltage)
• Logging rate (1s, 10s, 10s average 1m, 5m, 30m, 1hr, 6hr, 12hr). Energy monitoring is limited to 1s and 10s average.
• Signal type (a.c. or d.c.)
• Supply voltage (energy monitoring only)
• Cost per kWh (energy monitoring only)
• High and low alarm levels
• Scaling factor (when using a current clamp only, to accomodate multiple turns through the clamp or different mV/A ratios)
• Immediate, delayed and push-to-start logging
• Display off, on for 30 seconds after button press, or permanently on
• Data rollover (allows unlimited logging periods by overwriting the oldest data when the memory is full)

DIMENSIONS

All dimensions in mm (inches)

BATTERIES
The EL-USB-ACT uses 2 x 1.5V AA batteries. Battery life will vary depending on the usage profile of the data logger. For example:

To achieve the best possible battery life choose the lowest sample rate suitable for your application and where acceptable choose for the LCD to turn off after 30 seconds. It is also advisable to use the best quality batteries available. We recommend that you replace the battery every month, or prior to logging critical data.

The EL-USB-ACT does not lose its stored readings when the battery is discharged or when the battery is replaced; however, the data logging process will be stopped and cannot be re-started until the battery has been replaced and the logged data has been downloaded to a PC.When replacing batteries, ensure the EL-USB-ACT is not connected to the PC.

Note: Leaving the EL-USB-ACT plugged into the USB port for longer than necessary will cause some of the battery capacity to be lost.

WARNING
Handle batteries carefully, observe warnings on battery casing. Dispose of in accordance with local regulations.

DISPLAY AND STATUS FUNCTIONS
The EL-USB-ACT features a high contrast LCD. The LCD shows logged values using seven segment numbers and corresponding symbols.
The LCD also shows information regarding the logger status.

The EL-USB-ACT has three different modes:

• In ‘current mode’, three different functions are available on the display – most recent logged current, maximum logged current and minimum logged current.
• In ‘millivolt mode’, three different functions are available on the display – most recent logged voltage, maximum logged voltage and minimum logged voltage
• In ‘energy monitoring mode’, five different functions are available on the display – most recent logged power, maximum logged power, minimum logged power, cumulative energy consumption and cumulative cost (only available if a cost per kWh is entered in the software during setup).