20140221 impedo duo user guide - ct lab power · pdf fileimpedo’duo! user!guide!! 4 1...

Impedo DUO Power Quality Recorder

User Guide

Version 1.0.0 © CT Lab February 2014

CT LAB (Pty) Ltd

PO Box 897, Stellenbosch, 7599, South Africa

15 Termo Lane, Techno Park, Stellenbosch, 7600, South Africa

Tel: +27 21 880 9915 Fax: +27 21 880 1088

Email: [email protected]

Web: www.ctlab.com

Impedo DUO User Guide 2

Table of Contents 1 Impedo DUO Product Description ................................................................................................ 4 1.1 Xross-‐Trigger® and Snapshot® Mechanisms .................................................................................. 4 1.2 Measurement Interfaces .......................................................................................................................... 4 1.3 Power sources ............................................................................................................................................. 4 1.4 Communication ........................................................................................................................................... 4 1.5 Enterprise Support .................................................................................................................................... 5 1.6 Multi-‐touch LED Display .......................................................................................................................... 5 1.7 Sampling Rate .............................................................................................................................................. 5 1.8 The 1/6th Sense .......................................................................................................................................... 5 1.9 Event Recording .......................................................................................................................................... 5 1.10 10/12-‐Cycle Block Recording .............................................................................................................. 5 1.11 Clock synchronised recording ............................................................................................................. 5 1.12 Synchrophasors ........................................................................................................................................ 6

2 Impedo DUO External Interfaces ................................................................................................... 6 1.1 Power Supply ............................................................................................................................................... 6 2.1 Voltage Inputs .............................................................................................................................................. 7 2.2 Current Inputs ............................................................................................................................................. 8 2.3 Current Transducer Inputs ..................................................................................................................... 9 2.4 Relay Outputs .............................................................................................................................................. 9 2.5 GPS Antenna .............................................................................................................................................. 10 2.6 Ethernet Ports .......................................................................................................................................... 10 2.7 USB Peripheral Ports ............................................................................................................................. 11 2.8 OLED Display (Start Gesture) .............................................................................................................. 11 2.9 Multi-‐Touch Display ............................................................................................................................... 11

3 Impedo DUO Installation ............................................................................................................... 12 3.1 Panel Mounting Installation ................................................................................................................ 12 3.2 19” Rack Mounting Installation .......................................................................................................... 13 3.3 AC Power .................................................................................................................................................... 13 3.4 Voltage Circuits ........................................................................................................................................ 14 3.4.1 110 V Voltage Transformer (VT) Circuits & 400V Direct (Star/ 4-‐wire systems) ................... 14

3.5 110V Voltage Transformer (VT) Circuits or 400V/550V Direct (Delta/3-‐wire systems)14 3.6 Current Circuits ........................................................................................................................................ 15 3.6.1 1A/5A Current Transformer (CT) Circuits ................................................................................................ 15 3.6.2 1V Output Current Transducer Circuits ...................................................................................................... 15

3.7 Time and the DUO ................................................................................................................................... 16 4 Embedded Software Functionality ............................................................................................ 16


4.1 Unpacking and setup of ImpedoDUO ................................................................................................ 16 4.2 Starting the Impedo DUO ...................................................................................................................... 16 4.3 Impedo DUO Unlock Screen ................................................................................................................. 16 4.4 How to navigate the DUO user interface .......................................................................................... 17 4.5 OLED Status Icons .................................................................................................................................... 17 4.6 System Preferences ................................................................................................................................ 17 4.6.1 Time Zone ................................................................................................................................................................ 17 4.6.2 Communication ..................................................................................................................................................... 18

4.7 Standalone vs. Enterprise mode ......................................................................................................... 18 4.8 Registering a meter in Standalone mode with Osprey Lite ....................................................... 19 4.9 Metering Points and Instrument Configuration ........................................................................... 19 4.10 Create and attach a meter point ...................................................................................................... 19 4.11 Configuration of an instrument ....................................................................................................... 19 4.12 Trends ....................................................................................................................................................... 19 4.13 Monitors ................................................................................................................................................... 20 4.14 Other ......................................................................................................................................................... 20 4.15 Commit ..................................................................................................................................................... 20 4.16 Real-‐Time View ..................................................................................................................................... 20 4.17 Manage Data ........................................................................................................................................... 20 4.18 PQ Events ................................................................................................................................................. 20 4.19 Log Viewer ............................................................................................................................................... 20 4.20 Timed Recording ................................................................................................................................... 21


1 Impedo DUO Product Description The Impedo DUO is a comprehensive Dual Feeder Multi-‐function power monitor with GPS locked time synchronisation that complies with the following IEC norms:

• Power Quality Measurement (IEC 61000-‐4-‐30 (Rev3.0) -‐ Class A)

• Harmonic & Inter-‐harmonics (IEC 61000-‐4-‐7)

• Flicker Meter (IEC 61000-‐4-‐15)

• Synchrophasor Recorder

• Billing Meter (IEC 62053-‐22/23-‐Class 0.2) (Optional)

• SCADA Transducer (IEC 61850) (Optional)

The Impedo Duo contains two independent GPS synchronised instruments in one – each with 4 x voltage and 4 x current inputs. It is housed in a rugged machined aluminium enclosure and features an on-‐board GPS, high-‐resolution LED Display, multi-‐touch man-‐machine interface, audio I/O, 2 x Gigabyte Ethernet ports and 2 x USB2.0 (HS) ports. All communication is secure and the instrument password protected.

1.1 Xross-‐Trigger® and Snapshot® Mechanisms The Xross-‐Trigger® event synchronisation mechanism enables the recording of a Snapshot® of GPS time synchronised data from a group of remotely installed instruments. Each instrument maintains a large buffer of raw GPS time synchronised voltage and current data. When triggered, one instrument will dispatch a Xross-‐Trigger® command to the others via the IP network. Upon receipt of a Xross-‐Trigger® command, each instrument will retrieve and store the requested raw historic data from its’ large on-‐board buffer. Once retrieved, the user can analyse and display the Snapshot® of data.

1.2 Measurement Interfaces Each voltage measurement unit interfaces directly to VT circuits (110V) or Mains (<600V) through the differential voltage measurement interface. The first 3 voltage inputs are Neutral referenced (R-‐N, W-‐N, B-‐N). The 4th voltage input is a differential measurement.

The instrument calculates line voltages from the simultaneously sampled phase voltages.

Permanently installed 1A or 5A CT’s, or clamp-‐on CT’s interface directly to the galvanically isolated current inputs. The instrument calculates the “missing current” by assuming the sum of all currents = zero.

Alternatively, 1 VRMS voltage output current transducers can be used to measure current. Current to voltage transducers directly interface to 4 low voltage differential inputs.

1.3 Power sources The instrument is powered from a power factor corrected AC supply input (90–300V AC/DC) or via IEEE 802.3-‐2008 compliant PoE Plus (<25W) sources.

The internal LiFePO4 battery powers the instrument in the absence of power. This battery guarantees 2,000 charge/discharge cycles. It translates to a 5-‐year life expectancy if cycled once per day.

1.4 Communication 2 x Gigabyte Ethernet ports facilitate local and networked external communication. One port is used to interface with corporate networks (DHCP or fixed IP support). The other port is used to create a local network (local DHCP server).

The remote support software supports automatic service discovery protocols. Laptops, when connected to the Impedo DUO, will receive an IP from the instrument. The remote support software will automatically discover which instruments are connected to the network.


USB ports are only used to interface to external devices like mass storage, WiFi modules, GPRS Modems, actuators, digital I/O sensors etc.

1.5 Enterprise Support When connected, each instrument automatically establishes a permanent secure communication link to a corporate server (local or internet based). An instrument management system (IMS) keeps track of each instrument’s location, configuration, health (telemetry) and data.

Downloading of data is automated and recorded data can be accessed via the internet in graphical, tabled and report form as and when it becomes available. Raw data can be exported for further analysis.

Specialist analysis tools are available to group events and classify and report on data according to industry standards such as NRS048, EN50160 and IEE1158. All communications are encrypted and each instrument is password protected.

1.6 Multi-‐touch LED Display Captured data are stored in an on-‐board SQL database. The multi-‐touch LED Display facilitates powerful local data browsing and instrument configuration. Real-‐time data and an installation wizard enable fault-‐free installations. No laptop or mobile phone is required to install, browse or retrieve data.

1.7 Sampling Rate The instrument samples all analog inputs at a sampling rate of 0.5 MHz. All parameters are calculated and events are triggered from the high-‐speed digitised waveforms.

Captured waveform data are subsampled to reduce stored data size. The user can configure the waveform-‐sampling rate from 1kHz to 50kHz.

1.8 The 1/6th Sense The Impedo DUO calculates a complete set of 1-‐cycle sliding RMS and fundamental phasor parameters on every zero-‐cross of each of the 3 voltage phases to obtain 1/6th cycle parameters (6 samples per cycle).

This high resolution of 1-‐cycle data enables accurate depth/duration calculations and smooth event profiles.

1.9 Event Recording Upper and/or lower thresholds can be defined for waveform, 1/6th sense, 10/12-‐Cycle block and aggregated parameters. Single-‐phase and multiple-‐phase triggers can be defined. When exceeded, the Impedo DUO will retain pre-‐ and post information of the event.

1.10 10/12-‐Cycle Block Recording The Impedo DUO records all RMS and harmonic data from each 10/12-‐cycle block (≈200ms block). These block values contain both amplitude and angle information of harmonics and unbalance phasors. Each block is time-‐stamped with a 1μs time resolution. Alternatively, the user can average N x blocks to reduce the sampling rate. Averaged block harmonic and unbalance phasors does not contain angle information.

1.11 Clock synchronised recording 10/12-‐Cycle block RMS and Harmonic parameters are aggregated according to IEC61000-‐4-‐30 requirements over a user-‐defined time interval. Clock synchronised parameters are time-‐stamped with a 1 second time resolution.


1.12 Synchrophasors The ImpedoDUO is also a Phasor Measurement Unit (PMU). Recording of synchrophasors can be activated in the configuration setup but it can generate a lot of data with a premium on the bandwidth of the communication in use. Contact CT Lab for support if interested in the synchrophasor.

2 Impedo DUO External Interfaces The ImpedoDUO is a three-‐phase power quality recorder that contains 2 independent meters in one. It is a stand-‐alone instrument, designed to record power quality anomalies for months at a time. Anomalies are recorded as events (including pre-‐ and post event recordings) or as trends (10-‐minute and 3-‐second interval) and are stored in on-‐board memory.

1.1 Power Supply

The Impedo DUO can be powered and charged via a power factor corrected universal input mains supply port or via IEEE 802.3-‐2008 compliant Power over Ethernet. A built in LiFePO4 battery will power the instrument for up to one hour in the absence of power. This battery has a design life expectancy of more than 2,000 charge/discharge cycles.

The Power Supply port contains 3 terminals on a removable/lockable plug. Each terminal can accommodate conductors with size up to 2.5mm2.


Terminal Legend Description

1. L Live Terminal

2. E Safety Earth

3. N Neutral Terminal

The supply voltage input range is from 90 VRMS to 300 VRMS AC or DC (42-‐69Hz for AC sources).

The supply current is power factor corrected and the maximum supply power to the Impedo DUO is actively limited to 25VA enabling Impedo DUO to be powered directly from 110V 50/60Hz VT circuits.

An internal electronic fuse protects the Impedo DUO. The Impedo DUO will automatically disconnect from mains if excessive current is drawn from the universal AC/DC supply input port. When this protection was activated, it needs a few minutes to cool, during which the Impedo DUO will not restart even with valid mains voltage.

In the absence of power, the on-‐board battery will power the instrument for up to one hour. When the State of Charge (SoC) of the battery drops below 30%, the instrument will gracefully shut down to protect the battery from being damaged. When power is restored, the instrument will only restart when the battery SoC has recovered to at least 35%. During this period an icon on the OLED-‐display will indicate a battery warning symbol.

The Safety Earth terminal connects all exposed metal parts to external earth.

Built-‐in Surge protection devices will protect the instrument from short period overvoltage conditions.

IEEE 802.3-‐2008 compliant Power over Ethernet (PoE) is available on both Ethernet ports. The PoE capability enables the Impedo DUO to be powered through the communication infrastructure. The Impedo DUO will therefore be available at all times if the communication infrastructure stays active.

2.1 Voltage Inputs Each individual meter contains 4 resistive differential voltage inputs. The first 3 voltage inputs share a common reference input. The voltage inputs are available on a 6-‐terminal lockable connector plug. Each terminal can accommodate conductors with size up to 2.5mm2.



1. V1 Phase 1

2. V2 Phase 2

3. V3 Phase 3

4. Vcom Reference for V1-‐3

5. V4+ Phase 4

6. V4-‐ Reference for V4

A single 600 VAC-‐RMS voltage input range with 20 mV resolution simplifies installation and ensures good accuracy for both the fundamental component and harmonics.

High impedance inputs prevent the accidental shorting of VT inputs to system ground and eliminates ground loops. Differential resistive inputs assure a safe, stable analog input stage with minimum phase error, high bandwidth and zero temperature drift.

2.2 Current Inputs Each individual meter contains 4 galvanically isolated resistive current shunt inputs with input impedance of 20 mΩ and a full-‐scale measurement range of 6 AAC-‐RMS.

Resistive shunts provide excellent AC and DC response; zero offset drift and very low temperature drift.

The 3-‐second over current withstand rating of each input is 50 A. The galvanic isolation voltage between each channel and earth is 1 kV.

The current inputs are available on an 8-‐terminal lockable connector plug with screw terminals. Each terminal can accommodate conductors with size up to 2.5mm2.



1. I1+ Phase 1 Current Input

2. I1-‐ Phase 1 Current Return







2.3 Current Transducer Inputs Each individual meter contains 4 voltage output current transducer inputs with a full-‐scale reading of 1.4 VAC-‐RMS per meter. These voltage inputs can be used to directly interface with voltage output current sensors such as Hall-‐effect devices and Rogowsky coils.

The current inputs are available on an 8-‐terminal lockable connector plug with screw terminals. Each terminal can accommodate conductors with size up to 1.5mm2.

Terminal Legend 1V Output Current Transducer Circuits

1. V1+ Voltage 1

2. V1-‐ Voltage 1 Reference

3. V2+ Voltage 2


5. V3+ Voltage 3


7. V4+ Voltage 4


2.4 Relay Outputs Six relay outputs (100 mAAC-‐RMS, 350 VAC-‐RMS) are used to provide pulsed outputs or to control external processes. The outputs are arranged into 2 galvanically isolated clusters (1 kV isolation); each containing 3


switched contacts with a common return path. The relay outputs are available on an 8-‐terminal lockable connector plug with screw terminals. Each terminal can accommodate conductors with size up to 1.5mm2.


1. S1 Switch A1

2. S2 Switch A2

3. S3 Switch A3

4. CA Switch A Common

5. S4 Switch B1

6. S5 Switch B2

7. S6 Switch B3

8. CB Switch B Common

2.5 GPS Antenna The female SMA port is used to interface an external powered (+3V3) GPS antenna to the Impedo DUO. The built-‐in GPS is used to measure absolute time. The Impedo DUO locks its internal clock to within 100ns from absolute time.

2.6 Ethernet Ports Two Gigabit Ethernet ports provide an external communication interface to the Impedo DUO.

The port marked Eth.2 is used to establish communication to an enterprise network or to a laptop/PC running Osprey Lite (CT Lab’s licence free support software suite). The user has the ability to manually configure the IP address of this port or to allow the address to be issued by a remote DHCP server.


The port marked Eth.1 is used to create a local network. The Impedo Duo is configured by default to issue DHCP addresses. This port is primarily used to establish communication to a Laptop/PC that is not connected to an enterprise network.

IEEE 802.3-‐2008 compliant Power over Ethernet (PoE) is available on both Ethernet ports. The PoE capability enables the Impedo DUO to be powered through the communication infrastructure. The Impedo DUO will therefore be available at all times while the communication infrastructure stays on-‐line.

2.7 USB Peripheral Ports Two powered USB2.0 compliant (450 MBit) USB ports are used to interface to external peripherals like: Memory sticks, WiFi Dongles, GPRS modems, RS485 serial ports, external I/O modules etc. Each port can power peripherals with a peak power of 2.5W. However – it is recommended not to exceed simultaneous average power of 2.5W.

2.8 OLED Display (Start Gesture) The OLED display is used to display instrument status.

A multi-‐touch gesture (single finger slide from top to bottom) is used to switch on the instrument.

The detail of each icon on the OLED display is discussed later in this document under the embedded software section.

2.9 Multi-‐Touch Display A high-‐resolution full colour multi-‐touch enabled display is used to

• Directly configure the instrument

• Provide an installation wizard with real-‐time voltage and current information during installation


• Provide real-‐time waveform, RMS phasor and harmonic feedback

• Configure instrument preferences and Ethernet IP addresses

The detail of each icon on the Multi-‐Touch display is discussed later in this document under the embedded software section.

3 Impedo DUO Installation

3.1 Panel Mounting Installation Two stainless steel mounting plates are used to mount the Impedo DUO into panels. Both mounting plates form a dust collecting/water repelling “roof” on both the front and backside of the instrument, while concealing the rough edges of the cutout area required through the panel. Four M4 Stainless steel screws are used to bolt the plates onto the Impedo DUO.


3.2 19” Rack Mounting Installation A 19” rack (4U) stainless steel mounting plate carry the Impedo DUO while providing a mechanical interface for 19” racks.

3.3 AC Power IMPORTANT: Always connect the Safety Earth terminal located on the Power connector first!


1. L Live Terminal

2. E Safety Earth

3. N Neutral Terminal


3.4 Voltage Circuits

3.4.1 110 V Voltage Transformer (VT) Circuits & 400V Direct (Star/ 4-‐wire systems)

Important: Always connect the Safety Earth terminal found on the Power connector first!

Terminal Legend 110V VT Circuit or 400V/550V Star (4-‐wire) Systems

1. V1 Phase 1

2. V2 Phase 2

3. V3 Phase 3

4. Vcom Neutral (Star connection point)

5. V4+ Earth (optional for 400V systems only)

6. V4-‐ Star connection point (Neutral) (Optional for 400V systems only)

• Connect Phase 1,2 and 3 to Voltage Inputs 1-‐3 as shown in the figure below.

• Connect Neutral (on 400V systems) or the star-‐point (on 110V VT circuits) to Vcom.

• The fourth voltage input may be used on 400V systems to measure Neutral-‐Earth voltage.

3.5 110V Voltage Transformer (VT) Circuits or 400V/550V Direct (Delta/3-‐wire systems) IMPORTANT: Always connect the Safety Earth terminal found on the Power connector first!

Terminal Legend 110V VT Circuit or 400V/550V Delta (3-‐wire) Systems

1. V1 Phase 1

2. V2 Phase 2

3. V3 Phase 3

4. Vcom Open (Note: Vcom may also be connected to the earthed Phase/Phase 2 on 110V VT circuits)

5. V4+ Open

6. V4-‐ Open

1) Connect Phase 1,2 and 3 to Voltage Inputs 1-‐3 as shown in the figure below.

2) Leave Vcom open or connect Vcom to the earthed Phase (Phase 2) on 110V VT circuits.


3.6 Current Circuits

3.6.1 1A/5A Current Transformer (CT) Circuits










• The DUO can be configured to derive the Neutral current by the summation of the 3 line currents in star connected (4-‐wire) circuits.

• The DUO can be programmed to derive any one of the missing line currents by the summation of the other 2 currents in Delta connected (3-‐wire) circuits

3.6.2 1V Output Current Transducer Circuits

Terminal Legend 1V Output Current Transducer Circuits

1. V1+ Voltage 1


3. V2+ Voltage 2


5. V3+ Voltage 3


7. V4+ Voltage 4


The current transducer input on the Impedo DUO has a peak voltage input range of 2 V (1.4 VRMS).


3.7 Time and the DUO The Impedo DUO has three sources of time. The selection of which time source to use is transparent and automatic, with the most accurate source available given preference. The current selected time source is shown on the OLED display with one of three icons.

Sources (in order of increased accuracy):

No synchronisation. The internal RTC, with an accuracy of 10 ppm, can drift up to 0.86 seconds per day.

NTP time synchronisation is available with a permanent internet connection, enabling time to be managed to be within 20 ms of the NTP time source.

The built-‐in GPS needs an active external antenna and enables time to be managed to within 100 ns.

4 Embedded Software Functionality

4.1 Unpacking and setup of ImpedoDUO

F Check battery charge level first After removing the instrument from its packaging, touch the LCD screen. If the OLED display does not show a flashing power icon, the battery has discharged too far and the instrument will not power up before sufficient battery charge level has been obtained. Place the instrument on power and wait until the flashing power icon is visible on touching the LCD screen.

The fast charge mode will require 2 hours to restore the battery to 100% state of charge (instrument must be powered down). A maximum of 40 minutes would be required to restore 35% power, where after the instrument can be started.

4.2 Starting the Impedo DUO The Impedo DUO does not contain a physical power switch. A start gesture on the OLED display is required to power it up (single finger slide from top to bottom).

On the first touch (anywhere on the glass panel), the Impedo DUO power management unit (PMU) will scan the battery status. If more than 35% of power is available, the PMU will switch on the OLED to display a large power switch symbol. When touching the power switch symbol, the PMU will animate the gesture required to switch on the instrument.

A small processor icon followed by a tick symbol will follow after recognition of a valid start gesture. The tick symbol indicates successful booting of the embedded operating system.

Note: External power is required if no response was received on the OLED display (battery state of charge is less than 30%).

4.3 Impedo DUO Unlock Screen The Impedo DUO will switch off the main display to save power and to protect the instrument from unauthorised access. Touching the glass panel will switch on main display with the unlock-‐screen with an unlock button towards the upper right corner of the screen. The unlock-‐screen is password protected, but the user may choose to disable password protection.

Note: Password protection is disabled by default – enable password protection in the Registration application to protect the instruments from unauthorised access.


4.4 How to navigate the DUO user interface

The Back button returns you to the previous screen in an application. When on the first screen of an application, it will return you to the DUO home screen.

The Keyboard Hide button replaces the back button whenever the keyboard is visible onscreen. Pressing it hides the keyboard.

The Home button returns you to the home screen immediately.

The Window List button brings up a list of applications currently active. Touch an item in the list to navigate to that application.

The Power button. Touching the power button will lock the instrument and will display the Unlock-‐ screen. Within a few seconds after the unlock screen was displayed, the processor will shut down the main display to save power.

To power down the entire instrument, the user must touch and hold the power button. A ‘Power Off’ window will pop up to ask the user to confirm powering the instrument down. Pressing the OK button will power the instrument down.

4.5 OLED Status Icons The OLED display is used to provide permanent visual feedback of the instrument status.

When the and icons are displayed at the top row, both sides of the instrument are assigned to a valid metering point and are recording data as per configuration. When or icons are displayed, meter A or B are disabled and are not recording data.

The following are displayed on the OLED:

Meter Enabled icons

• Impedo DUO serial number; • IP address of ETH. 2 ; • Internal temperature; • Battery capacity; • Remaining disk capacity; and • System clock icons.

The following applications are available from the desktop of the instrument:

4.6 System Preferences

4.6.1 Time Zone

Ensure the correct time zone for your region is selected.


4.6.2 Communication

4.6.2.1 Communicating via 3G/GPRS modem

Connect the modem to the USB 1 port. Under preferences, click the 3G/GPRS option to search for modem. Enter APN information if a private APN is used. Click on ‘Connect’.

Note: the DUO currently only supports the HAUWEI model: K3565 USB modem.

4.6.2.2 Communicating via Ethernet on LAN

Connect the DUO to the network through Ethernet Port 2. In the Preferences application, set up the DUO to either receive IP configuration from a DHCP source or enter a fixed IP configuration, depending on your connection model. DHCP is only advised when running the instrument in Enterprise mode.

4.6.2.3 Communicating via Ethernet through a Router

Connect the DUO to the router through Ethernet Port 2. In the preferences application, set up the DUO to have a fixed IP in the same IP range as the DUO. Please ensure that the gateway address of the DUO is set as the router’s local IP address. Example:

Router:

IP: 192.168.254.1 Netmask: 255.255.255.0

DUO:

IP: 192.168.254.2 Netmask: 255.255.255.0 Gateway: 192.168.254.1

On the router, port forwarding needs to be set up to forward ports 27030 -‐ 27045 to the DUO’s address.

4.6.2.4 Communicating directly with a laptop or PC

Ethernet Port 1 is used for local direct connection to the instrument with a laptop or PC. The instrument acts as a DHCP server and will allocate an IP to the PC/laptop.

This means the laptop/PC needs to be set up to receive its IP configuration through DHCP.

Clicking Discover button on the Address Book page of the Osprey software will then connect the instrument and the laptop without needing to know any IP information.

4.7 Standalone vs. Enterprise mode The DUO can operate in either Standalone or Enterprise mode, with standalone mode being the default mode.

In Standalone mode:

-‐ Recording configuration is set directly on the instrument or via Osprey Lite. -‐ Meter points can be created either on Osprey Lite or directly on the instrument. -‐ Data is downloaded manually by connecting to the instrument with Osprey Lite and activating a

download task. -‐ The instrument needs to be registered in Osprey Lite for this mode of operation.

Enterprise mode:

-‐ Requires an Osprey Pro Enterprise Server or connection to the CT Lab Bureau server. The server address is set in the Registration application and the DUO will automatically maintain a connection with the server.

-‐ Downloads to the server is automated.


-‐ Meter points can be generated only on the server and pushed to the DUO with the configuration software

4.8 Registering a meter in Standalone mode with Osprey Lite Each instrument is supplied with a digital key (meter file) that needs to be registered in the Osprey Lite software before access to the instrument with the software is granted. The Register Meters page can be found in the Setup section of the Osprey Lite menu.

4.9 Metering Points and Instrument Configuration

F The DUO will only record when a meter point is attached to a meter.

4.10 Create and attach a meter point To create a meter point and attach it to a specific meter, click on either Meter A or Meter B. Click the ‘Create’ button that appears bottom right. Enter the meter point name, description and the voltage level (nominal voltage) under which the meter point operates. Click on ‘Next’.

Select the installation topology, supply frequency and the declared voltage. Declared Voltage can be different from the nominal voltage in that the utility can operate the network at a higher level than designed. This ensure that the client at the furthest end of the line still receive adequate voltage.

Enter the VT ratios. If the 4th channel is used with a VT that has a different ratio than the main VT, uncheck the Link Channel 4 button to enter the different ratio for channel 4. Click on ‘Next’.

Click the ‘Enable’ button should you plan to record current data. Select the sensor type used to measure the current. This should correspond with the physical connections of the chosen sensor type to the instrument. Enter the transducer ratio. If channel 4 uses a transducer with a different ratio than the rest, uncheck the Link Channel 4 button to enter the different ratio for channel 4. Note that it is possible to use a different sensor type on channel 4 than channels 1-‐3. Click “Next”.

A verification screen for the voltage channels is now available. Verify the physical connections by the phase rotation as displayed, the VT ratios and the declared voltage. Errant values can be corrected from this screen. Once the voltage channel setup is confirmed, click “Next”.

A verification screen for the current channels is now available. Verify the physical connections from the phasor rotation as displayed. Correct the polarity of CT’s if necessary. Ensure that the current readings are as expected and correct CT ratios if not. Click “Finish” when confident about the setup.

The newly created meter point is now attached to the specific meter selected. The instrument is now recording. Click on the Meter A or Meter B text in the Meters list. This will fold open the configuration menu.

4.11 Configuration of an instrument Once a meter point is attached, you can configure what it should record.

4.12 Trends The different trended data to be recorded has to be activated The DUO can record all the IEC61000-‐4-‐30 prescribed trend periods. On top of those, 2 custom trend periods are available should the user need it. The DUO can also record Synchrophasors.

See the Osprey Lite manual for a description of each trend type.


4.13 Monitors The monitors are devices used to recognise certain network events and then record diagnostic data when such events occur.

See the Osprey Lite manual for a description of each event type.

4.14 Other The DUO records waveforms as part of the diagnostic data captured by the monitors or a timed recording. The default sampling rate (retained samples) is the highest option of 1000 samples/cycle. To conserve disk space or bandwidth costs, applying a subsample rate can reduce the sampling rate.

4.15 Commit Once all settings in all sections have been set – click the ‘Commit’ button to apply the configuration to the meter.

4.16 Real-‐Time View Three screens are available to view the real-‐time information as measured by the DUO. They are screens for Vrms & Irms, Power and Harmonic data. Navigation between screens can be done either by touching the arrow buttons on the right of the screen, or by downwards and upwards swiping gestures.

4.17 Manage Data The DUO will manage its own disk space by deleting the oldest data first when it is full. Through the Manage Data application one can however selectively delete data when needed.

4.18 PQ Events Browse a simple list of events captured by the instrument. These events are not classified to any specific standard. Classification is done offline with the Osprey Software.

4.19 Log Viewer View the Android system and CTLab software log. This is support information, not measurement information.


4.20 Timed Recording

Schedule a recording of fixed duration, optionally repeatable to capture diagnostic data based on a timed schedule. One schedule per meter is possible. Saving a new schedule will overwrite the previous saved one

20140221 impedo duo user guide - ct lab power · pdf fileimpedo’duo! user!guide!! 4 1...

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