Frequently Asked Questions

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General FAQs

What's the difference between displacement and apparent power factor?
Displacement power factor is the ratio of the fundamental (60 Hz) real power to apparent power. Apparent power factor is a ratio of total real power (including harmonic component) to apparent power.
How can there be a Power Factor of .87 on a 3-Phase Delta lighting load?
The line currents in a delta are shifted 30° compared to the line-line voltage. One line current will be shifted +30° and the other line current shifted -30° when compared to the line-line voltage. Since power factor is COS(theta), then COS 30° = .866. This will be true for the hardware channels. If the power sum channel (5 or 6) is used, the power factor for the whole load should be as expected.
Why am I seeing negative Watts on one phase of a 3-Phase Delta system?
The line currents in a delta are shifted 30° compared to the line-line voltage. When connected to a load that has a PF of <.5 (>60°) (e.g. a motor not fully loaded) one line current becomes shifted >90° (30° +>60°) when compared to the line-line voltage. The other phase is shifted >30° (-30° + >60°). The COS of an angle >90° is negative, therefore WATTs = COS(theta)VA is negative for that phase. However, as with the power factor the sum of the watts in a delta should be positive. If not, check the CT orientation, one or both may be reversed. Also check to make sure the CT's are referenced to the correct line voltages.
Can I use the software to assist in verifying a current transformer connection?
Yes. If no current transformer is connected to a channel that is turned on, then a non-zero reading will be displayed. If the CT is connected but shows a '0' for a value, then the CT is probably connected but the monitored load is turned off. On the other hand if a constant value for current is displayed, a CT wire may have come off of the logger.
Is the battery on my DENT ELITEpro/DATApro/SMARTlogger rechargeable?
No. These DENT loggers have single-use Lithium cell batteries that cannot be recharged and should be disposed of properly. Please contact DENT Instruments for replacement batteries.

ELITEpro XC

How do I obtain a copy of ELOG 15 software and which operating systems is it compatible with?
To obtain a free download of ELOG software, please visit our Downloads page. The most current software is always posted to this page. ELOG 15 is compatible with Windows 10, 8, 7, and Vista. It is not compatible with Windows XP. If you are running Windows XP on your computer, please continue to use ELOG 14.
I am currently running ELOG 11/12/13/14. Is there a free upgrade to the newest ELOG?
If you have purchased ELOG software in the past, you may upgrade to the latest ELOG free of charge. Please visit our Downloads page to obtain a copy of the latest software for your instrument.
How do I update the firmware in my ELITEpro?
Current firmware files and instructions can be found on the Downloads page. Please click here to visit the download page.
Is ELOG 11/12/13/14 compatible with Windows 7 32/64-bit? Windows?
ELOG 11/12/13/14 is compatible with Windows 7 (32 and 64 bit) operating systems as well as Windows 8. It is also compatible with Vista 32 and 64 bit and Windows XP.
Does the ELITEpro XC/SP have an internal battery?
The ELITEpro XC does have an internal battery, but it is only for powering the logger's internal clock--it does not power the ELITEpro XC. The ELITEpro XC is line powered, but maybe also be powered from a USB connection or from a wall transformer (sold seperately). Request a quote on a wall transformer here.
What is the typical lifespan of the clock battery?
The typical battery life is 10 years. The battery is not user replaceable. Contact DENT Instruments for replacement information.
Which CTs can I use with my ELITEpro XC/SP?
The ELITEpro XC is compatible with any split-core, clamp-on, or flexible RoCoil current transformers found on the DENT website. Any CTs that are compatible with the legacy ELITEpro instrument are also compatible with the ELITEpro XC.
What type of antenna is available with the Wi-Fi option?
ELITEpro XC loggers that are equipped with a Wi-Fi package contain an internal antenna. An external antenna is optional (and can be ordered in addition to the internal antenna--that is, a logger with external antenna will also have an internal antenna). You may toggle between using the internal and external antenna (if it is available on your logger) by checking or unchecking the User External Antenna checkbox in ELOG.
Are Wi-Fi, Bluetooth, and Ethernet-equipped ELITEpro XC/SP instruments compatible with ELOG 11?
No, ELITEpro XC/SP instruments with additional communications options are not compatible with ELOG 11. They must be used with ELOG 12 or newer. However, "older" ELITEpro SP instruments without additional communication options are also compatible with ELOG 12. Contact DENT tech support to obtain ELOG software that is compatible with your meter.

PowerScout Series

Is ViewPoint v2.24 compatible with Windows 10/8?
ViewPoint version 2.24 and later is compatible with Windows 8, Windows 7 (32 and 64 bit), and Windows XP. ViewPoint 4 is compatible with Windows 10, Windows 8, and Windows 7, but not Windows XP. Please visit our Downloads page to obtain a copy of the latest software for your instrument.
What is the maximum distance for Modbus communication?
Modbus can reach a distance up to 1200 yards with data rates at 100 kbps.
What is the purpose of setting a scalar value?
Each Modbus register is only 16 bits wide and is in integer format without any fixed number of decimal points. Simply putting a value directly into one of these registers would limit the smallest number to be 1, and only allow for a maximum value of 65535. To handle larger numbers, or numbers with better resolution, we use a scalar value that is used to apply a factor to the 16-bit register value.
One (or more) of the PhaseChek LEDs is red. What does this mean?
Any number of red lights indicates the PowerScout is wired incorrectly. Review the table in the PhaseChek section of the manual for a description of the indicator lights.
How is the PowerScout powered?
All PowerScout instruments are line-powered. An internal power supply attached between L1 and L2 provides power to the unit.
How many PowerScout 3/3037 instruments can be connected together?
Up to 254 PowerScout 3 or 3037 meters can be connected together if they are using Modbus for communications. Up to 127 PowerScout 3 or 3037 meters may be connected together if they are communicating via BACnet.
How is hexadecimal (HEX) to decimal converted?
Use the Hexadecimal to Decimal conversion table in the Appendix section of the PowerScout manual.
What is true RMS?
RMS stands for "Root-Mean-Square." True RMS is the Ac voltage/current that will produce the equivalent amount of heat in a resistor as a DC voltage/current, whether sinusoidal or not. For example, if a resistive heating element is rated at 15 kW of heat at 240VAC RMS, then the heat would be the same if we applied 240V of DC instead of AC. A meter without true RMS will incorrectly read distorted waveforms. All DENT Instruments' meters measure true RMS.
How accurate is the PowerScout 3037 and 3 Plus?
The PowerScout 3037 and 3 Plus meets the stringent ANSI C12.20-2010 Class 0.2 Accuracy standard.
How accurate is the PowerScout 24?
The PowerScout 24  meets the ANSI C12.20-2010 Class 0.5 Accuracy standard.
How long can I extend the leads on my RoCoil and/or split core current transformers?
The maximum length for RoCoils is 100 ft and the maximum length for split cores in 500 ft. Both cases require that the same wire type/AWG is used. To learn more about extending the leads on your current transformer, visit our blog post which outlines specifications and purchasing options.
Can a 3-phase balanced load be monitored with one CT?
This is not the best way to measure a three phase load, but there is an Amp Multiplier register (44605) that can be set for three which will multiply the current by three and, therefore, amps, watts, VA, and VARs will be three times greater.

RoCoil TCA-5

How can I tell if the amplifier is clipping?
The voltage across the output terminals is above 250mV RMS. Correct this by using a larger wire gauge or moving the TCA-5 closer to the meter.
Does output clipping damage the unit?
No, clipping the output signal does not harm the TCA-5.
Why does the TCA-5 run so hot?
Each channel dissipates approximately 5 watts of heat at full power.
Why is the TCA-5 limited to 4.5 Amps RMS on 3 single-phase loads?
The TCA-5 has a peak internal current of 19 amps.
Is there any configuration that can cause the TCA-5 to fail?
Yes. For example, over-ranging the TCA-5 on any single channel can burn it out. Ensure that the TCA-5 is not delivering more than 5 Amps RMS.
Is there a single phase version?
The TCA-5 can be used on single-phase circuits, however there is currently no "1 channel model."
Can the TCA-5 be used with 333mV current sensors?
The TCA-5 includes a 90 degree phase shifter. It can only be used with 333mV sensors to report current, NOT POWER.
I had the 50Hz selector on by mistake. Is my collected data any good?
Yes, the phase angle will be reported 0.6 degrees higher than actual, which is also about 0.6% low for a PF of 0.866.

SMARTloggers

Is SMARTware 11 compatible with Windows 10/8?
SMARTware 11 is compatible with Windows 10, Windows 8, Windows 7 (32 and 64 bit), and Windows XP. Please visit our Downloads page to obtain a copy of the latest software for your instrument.
Will my MAGlogger be able to sense a load if I just place it on the incoming line?
The MAGlogger can be used successfully without actually placing it on or near the actual device you are measuring. Sometimes you may need to experiment with the orientation of the logger or you may need to adjust the sensitivity. The MAGlogger will sense any signal greater than 40 milligaus. The MAGlogger will not sense a load if the L1 and L2 lines are close together as they tend to cancel each other out.
What type of information are the SMARTlogger instruments designed to provide?
Total running time, transition times, peak load times, kWh, and more.
How many records can a SMARTlogger store?
Memory is rated by number of transition points (on's & off's) and is 32,000.
Are TOU (time-of-use) instruments the same as SMARTloggers?
Yes. TOU simply stands for time-of-use, while SMARTloggers™ is the trade name we give our series of TOU loggers.
Does the MAGlogger require me to mount it directly on my dirty, hot, vibrating motor?
No, you can simply place it next to the incoming power line and the internal magnetic sensor will sense the flow of electricity and trigger the transition data.
Is there an instrument I can use to simply monitor the running time of a stand-alone device that has a cord?
Using the CTlogger TOU Plug Adapter with a CTlogger is the best way to monitor a device with a power cord, such as an appliance. Visit our blog to learn how to use the CTlogger in this type of application or request a quote for the Plug Adapter here.
If I use a SMARTlogger to monitor a load, can I get kWh calculations?
Yes, by simply asking the software to set the kW scale factor then reading the results in the summary. This works well under certain circumstances, but it's important to understand what the SMARTloggers were designed for and their limitations. SMARTloggers are primarily designed to give you run-time information for a load. So when the software calculates kWh, it needs to assume that the load remains constant during the measurement period (i.e., the amp draw is the same from start to finish). If it's not, or you're not sure, you may be better off with a true power meter, such as the ELITEpro XC. Learn more about selecting the right instrument here
How long does the battery last with the SMARTloggers?
The typical battery life of the SMARTloggers is 5 years. The battery is user replaceable. Contact the factory for availability.

 

Software / Communications

Where can I get a copy of the DENT software that I need?
Software for all DENT products can be downloaded from the Software Downloads page on the DENT website. If you need help installing or troubleshooting software, please contact DENT Tech Support at techhelp@dentinstruments.com.
Which operating systems are ELOG, SMARTware and ViewPoint compatible with?
ELOG, SMARTware, and ViewPoint are all compatible with Windows 10, Windows 8, and Windows 7. ELOG 2009 and newer, SMARTware 11 and newer, and ViewPoint are all compatible with Windows 7 (32 and 64 bit), Windows Vista (32 and 64 bit), and Windows XP. ELOG 12 and newer, SMARTware 11, and ViewPoint v2.24 and newer are also compatible with Windows 8.
The "Total Usage (channel 5) KWh" reported in the Data File Summary does not exactly match the individual channel 5 KWh "Total" number--why?
The "Total Usage (channel 5)" value is only updated once per minute. If your integration period is set to less than one minute, channel 5 KWh "Total" column will aquire data that has not been added to the "Total Usage (channel 5)" value. (For example, if your logger is set to 15 second integration and you aquire 1.5 minutes of data--or 6 intervals--that "Total Usage (channel 5)" will not include the final 2 recorded data points.)
How do I scale the graphs to suit my purposes in the software?
You can scale the graphs in ELOG by double clicking on the Y or X axis. Data can also be exported to Excel® for further manipulation and graphing.
How do I zoom-in when working with ELOG software?
Simply position the mouse pointer near the area to be zoomed. Hold the Control (Ctrl) key and left mouse button down at the same time, then drag the pointer to make a rectangle that covers the area to be zoomed. Let go of the mouse and Control Key and the graph will redraw a zoomed portion of the graph. The graph may be zoomed as many times as desired. Use the View > UnZoom (Ctrl U), or the key to unzoom, to zoom out again. 
When I am monitoring a load that requires more than one channel (such as a 3 Phase - 3 Wire Delta load) which channel shows my totals in my ELOG™ software?
When using more than one channel for one load, the results from each channel need to be added together to obtain the total power consumption. This is done using the computed channels 5 and 6.
Do I need software, and does it have to be ordered separately?
Yes, software is used to program and start the PRO series (ELOG™ software) and SMARTlogger™ (SMARTware™ software) series instruments, in addition to retrieving and analyzing the collected data. Current versions of DENT software can be found on the Software Downloads page.
Can I order the communication cables separately?
The ELITEpro XC and PowerScout meters communicate through a standard USB (A to B) cable which can be found at any office supply store. In addition, the ELITEpro XC is supplied with one USB cable. The SMARTloggers require a proprietary cable which can be obtained through DENT Instruments. Contact us for ordering information.
Once I have the data, can I export it to a spreadsheet?
Yes, data can easily be exported as a CSV file to spreadsheet programs like Excel®.
How will I know if I have sufficient memory to complete my study (ELITEpro/DATApro/ELITEpro XC/SP)?
The first page of the Setup Table automatically calculates memory capacity allowing the user to do "what-ifs." For example, if you adjust the recording interval, type of service, and recording flags, the Memory Capacity estimate will be updated in real-time.
Is the software the same for all the SMARTloggers™?
Yes, the SMARTware™ software is used for all SMARTlogger™ instruments.

ELITEpro & DATApro (discontinued)

Is the DATApro compatible with ELOG 11/12?
No, the DATApro is not compatible with ELOG 11/12. If you require replacement software for your DATApro, ELOG 2009 is compatible. Contact the factory for details.
I've installed ELOG on my Windows 2000 PC, but the program will not start. It says that I'm missing a .dll file.
Some Windows 2000 computers are missing the "gdiplus.dll." Please download this file here or from the Support Documents page of this website and place it in the main ELOG folder on your hard drive.
What is "Integration (or Recording) Interval"?
These are the periods that the logger will post data for. You can use 3, 15, or 30 sec., 1, 2, 5, 10, 15, or 30 min., or 1, 12, or 24 hour interval periods with the ELITEpro. All recorded values will have a time stamp using one of the above periods.
How exactly does an ELITEpro gather data to record a sample?
There are two answers to this question: (1) for situations where your ELITEpro is running on battery power only and (2) in situations where your ELITEpro is using external (wall) or Line-Power. (1) A logger using battery power only will take a sample every 1 minute and then go to sleep. For example: If you are set for a 5 minute integration period, the logger will wake every 60 seconds and take a sample. After 5 minutes, the logger will average the 5 samples and record the requested data. (2) If the logger is using external power, it will take a sample every 3 seconds regardless of the specified recording interval. So for example, if you are set for a 5 minute integration period, the logger will take a sample every 3 seconds and then use all 100 samples taken to find the Average, Minimum, and Maximum readings.
What exactly happens when an ELITEpro records a sample?
When a sampling interval occurs, the ELITEpro measures 128 points along a single 360° cycle for each phase being measured. It then calculates RMS values for each point and records the product for each requested sample as determined by the setup table.
What is "Waveform Sampling"?
This is the process of digitizing an analog waveform. The logger has a sampling frequency of 7.68kHz (128 points per waveform). The ELITEpro uses two 12 bit A/D to sample both current and voltage waveforms simultaneously. The data points from the waveform sampling are used for all calculations.
Why will the ELITEpro™ not allow me to set my integration interval at 30 seconds?
Most likely it is because you are powering the instrument from the internal batteries. When running from the internal batteries the rate at which it will sample is once per minute. This preserves the batteries. When sampling on external power (9V transformer) the instrument senses the power and switches into a fast sampling mode (once every 3 seconds).
How fast can I sample with the DENT ELITEpro™ logger?
Every three seconds is the fastest sampling rate at which the ELITEpro can record data. In order to record at less than one minute intervals, the ELITEpro must be either plugged into a wall outlet, or, if the unit has the 'Line-Power' option, drawing out power through the voltage leads. One minute is the fastest sampling rate for an ELITEpro using battery power only.
I'd like to use my own CT's. What voltage output will be compatible with the DENT Instruments?
The CT inputs of the ELITEpro can handle a maximum of 450mV or AC current. All of the CT's provided by DENT Instruments are shunted to output 0-333mVAC at rated current.
I've got a remote site with no phone line. How do I get the data?
The logger can use a external cell modem to provide data transfer from a remote location. Cell phone modems can be connected to the loggers serial port and provide a baud rate of 2400 baud. There is an option in PC Setup to set the software for extended timeouts for cellular communications. This feature will add timing delays and prevent dropouts. You can use AUTOPOLL, AUTOHOST or the manual dial features to retrieve logger data.
How long does the battery last and is it replaceable?
Battery life for the PRO series instruments is generally 3 years. The standard instrument uses one lithium C cell and the modem instrument uses two lithium C cells. The batteries are in holders and are easily replaceable. Contact the factory for availability and instructions. Note: Use the wall transformer whenever possible as this provides external power to the instrument and extends battery life.
What is the modem capability?
The internal modem of the PRO series instruments is 14.4k baud.
How will I know if I have sufficient memory to complete my study?
The best way to calculate the memory is in the first page of a setup table. Create the set up table in ELOG and view the calculated memory from the first page of the set up table. You can alter the table easily and see how it affects total memory.
Can I use the ELITEpro™ to monitor 400Hz (military) loads?
Yes! Simply set the logger to 50Hz on the first page of the Set Up Table. At 400Hz, the logger will sample at 16 times per cycle. This method works very well as long as there is little harmonic current beyond the 7th harmonic (2800Hx). 
When I compare the ELITEpro™ measurements on three phase loads with another meter, I notice that the watts and VAR's agree but VA and Power Factor do not. Why?
The usual reason is that the two meters are not calculating VA and Power Factor in the same way. Some meters include harmonics in the calculation and some do not. The ELITEpro can do both depending on whether the 2 watt-element method is being used (does not include harmonics) or the 3 watt-element method (does include harmonics).
What is the difference between the ELITEpro™ and the DATApro™?
The ELITEpro is a poly-phase power meter designed to measure electrical loads up to 600V. The DATApro is a four channel logging device designed to measure data provided from outside sensors that can produce any of the following inputs; 4-20mA, 0-10VDC, electrical currents, temperature signals, or pulse signals.
Which instruments record harmonics and waveforms?
Only our ELITEpro™ can monitor harmonics and waveforms and allow you to view it in real time however, the ELITEpro™ will not store this data. It will allow you to take a snapshot to attach to a file.
What are the memory capacities of the ELITEpro™ & DATApro™?
The standard memory is 128k (25,000 records) and the upgraded 512k memory (100,000 records) comes as an option. Memory capacity is a function of the integration interval, and recording flags set.
Can I upgrade my memory at a later date?
We are no longer offering upgrades to the legacy ELITEpro and DATApro instruments. Contact the factory for details.
What are the recording intervals of the ELITEpro™ & DATApro™ instruments?
3,15,30 seconds, 1, 2,5, 10, 15, 20, 30 minutes, and 1,12, 24 hours.
What kind of current transformers are available?
Three types: split-core, clamp-on and flexible (Rogowski). You may learn more about available CTs here.
Can I use CT's that I currently own with my new ELITEpro™ & DATApro™ instruments?
Only if they are shunted to 333mV's. This is the required input for both instruments. The CT inputs of the ELITEpro can handle a maximum of 450mV of AC current.
If power to the instrument is lost, does it stop recording and/or lose saved data?
Recording continues using the internal battery, however the sampling rate will change from every 3 seconds to once per minute to help extend battery life. Data that has been captured will be lost if the instrument goes completely dead.
Can I have an monitored event trigger the start of monitoring?
No, however you can delay start until a specific date and time.
How long does the battery last with the ELITEpro™ & DATApro™ instruments?
The typical battery life with these instruments is 3 years when the integration (data collection) interval is 1 minute or longer. The battery life can be as short as 1 month if the integration interval is set to less than 1 minute. The battery is user replaceable. Contact the factory for availability and replacement instructions.
What is the sampling rate of the ELITEpro™?
Sampling rate is the frequency measured in times per second that a logger reads each sensor. The ELITEpro™ reads once every three seconds (except when battery power is being used then it is once every minute). The integration interval is the period of time over which the samples that are read during the sampling rate, are averaged and then stored into the loggers memory.
What is the waveform sampling rate for the ELITEpro™?
This is the number of points on a given waveform that are measured and the values used to calculate RMS volts, and watts. The ELITEpro™ samples at 128 points per cycle regardless of how often a channel is read.
How do I connect my ELITEpro™ or my DATApro™ to my USB port?
Simply purchase our USB to Serial Port adapter.

Software Downloads

Misplaced the software disk or upgraded your computer? Download a current version of DENT software for your power meter or data logger here. ELOG, ViewPoint, and SMARTware software packages are available.

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Technical Documents

Visit DENT’s comprehensive online library of DENT’s technical content including product manuals, specification sheets, special application information, and more.

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