Category: WattsOn

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WattsOn Troubleshooting
Most issues regarding unexpected readings from the WattsOn meter are related to wiring.  Specifically, the proper installation including orientation, polarity and phasing (voltage to current phas...
Modbus Troubleshooting
For detailed RS-485 Troubleshooting steps, please see AN0303: http://www.elkor.net/pdfs/AN0303-Modbus_RTU_Troubleshooting.pdf When troubleshooting communications issues, it is best to completely s...
Current Transfomers
The WattsOn transducer is unique in that it can be configured to work with a variety of current transformer (CT) types. It can be ordered to work with industry standard 5A, 333mV or mA output type CT...
CT Ratios Explained
The WattsOn was designed to be used with a variety of CT types including mA output, 5A output and mV output types. WattsOn meters with inputs configured for 5A and 333mV may be used with any CT ...
CT Wire Length and Extension
Depending on the type of CT used, the leads may be extended varying distances. For 5A CTs, refer to this table: http://www.elkor.net/pdfs/5A_CT_Distance.pdf For mA CTs (MSCTx Series, MS Series, ...
Power Supply
The WattsOn requires a 15-24VAC or 20-30VDC, 100mA power supply. Normal current consumption is approximately 50mA, however startup current can peak around 100mA for a second or two. Multiple Watts...
Pulse Scaling
By default, the pulse value is 1Wh / pulse, but you need to include the CT multiplier. The CT multiplier is typically calculated as the full scale of the meter divided by 5. For example: WattsOn-110...
WattsOn-DISP Troubleshooting
The DISP installation manual is located here: http://www.elkor.net/pdfs/AN0801-WattsOn-DISP_Wiring_and_Configuration.pdf 1) Before configuring the meter for use with the display, ensure that you...
WattsOn Fusing
The WattsOn Power Meter requires fuses on the input to the voltage terminals at some point within the system. In some cases, the voltage may be tapped off of existing fuses or breakers. If this is not...
Using Multiple CTs per phase
Depending on the model of WattsOn used, it is possible to use multiple CTs per phase. This is desirable when multiple conductors are used per phase and one CT is not large enough to encompass them al...
Using WattsOn in Single/Split phase installations
The WattsOn meter was natively designed for three-phase applications, however because of its flexibility, it can be used in single phase, split-phase and "multi-phase" installations. Because the Watt...
WattsOn Re-calibration / Re-certification Period and Requirements
Periodic Re-calibration / Re-certification periods may be mandated in specific projects.  It is the role of the client to understand the requirements in their end applications. Elkor Technologie...
RC-600 (Rogowski Coil) Output Lead Length
Elkor's RC-600 Rogowski Coils are precision devices with special attention paid to performance and accuracy.  All Rogowski Coils are subject to external influences, but the RC-600 is specially de...
Understanding Modbus Register Addressing
  Application Note                            &nbs...

 
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