® 345 Power Quality Clamp Meter Users Manual PN 2560401 October 2006 © 2006 Fluke Corporation, All rights reserved. Printed in China Product names are trademarks of their respective companies.
LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days.
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BESCHRÄNKTE GARANTIE UND HAFTUNGSBEGRENZUNG Fluke gewährleistet, dass jedes Fluke-Produkt unter normalem Gebrauch und Service frei von Material- und Fertigungsdefekten ist. Die Garantiedauer beträgt 1 Jahr ab Lieferdatum. Ersatzteile, Produktreparaturen und Servicearbeiten haben eine Garantie von 90 Tagen. Diese Garantie wird ausschließlich dem Ersterwerber bzw.
GARANZIA LIMITATA E LIMITAZIONE DI RESPONSABILITÀ Si garantisce che ogni prodotto Fluke è esente da difetti nei materiali e nella manodopera per normali situazioni di uso. II periodo di garanzia è di un (1) anno a decorrere dalla data di spedizione. La garanzia sulle parti sostituite, sulle riparazioni e sugli interventi di assistenza è di 90 giorni. La garanzia è valida solo per l'acquirente originale o l'utente finale che abbia acquistato il prodotto presso un rivenditore Fluke autorizzato.
GARANTÍA LIMITADA Y LIMITACIÓN DE RESPONSABILIDAD Todo producto de Fluke está garantizado contra defectos en los materiales y en la mano de obra en condiciones normales de utilización y mantenimiento. El período de garantía es de un año a partir de la fecha de despacho. Las piezas de repuesto, reparaciones y servicios están garantizados por 90 días.
GARANTIA LIMITADA E LIMITAÇÃO DE RESPONSABILIDADE Todos os produtos da Fluke são garantidos contra defeitos de material e de mão-de-obra, sob condições de uso e serviço normal. O período de garantia é de 1 (um) ano, a partir da data de expedição. As peças, reparos do produto, e serviços são garantidos por 90 dias.
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Table of Contents Title Introduction .......................................................................................... Symbols ................................................................................................ Safety Instructions ................................................................................ Specifications........................................................................................ Electrical Data ..........................................................
345 Users Manual Display Symbols .............................................................................. Navigation and Measuring Keys ...................................................... Navigation through the Display........................................................ Measurement Setup .............................................................................. Basic Adjustments Required before Measuring ............................... Voltage Range Settings ................................
List of Tables Table 1. 2. 3. 4. 5. 6. 7. 8. Title Symbols ................................................................................................ Navigation and Measuring Keys........................................................... Voltage Measurements ......................................................................... Current Measurements .......................................................................... Waveforms Measurements....................................................
345 Users Manual iv
List of Figures Figure 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. Title Voltage Measuring Input ...................................................................... Slider Switch for Line Power Voltage (115 V and 230 V) ................... Power Adapter and USB Connection.................................................... 345 Front View ..................................................................................... Rear and Side View ...................................................
345 Users Manual vi
345 Power Quality Clamp Meter Introduction The Fluke 345 Power Quality Clamp Meter, referred throughout this document simply as the “Clamp Meter”, is a rugged, accurate, professional power industry tool for measuring current, voltage, and power quality. Symbols Table 1 lists the symbols used on the instrument and/or in this manual. Table 1. Symbols Symbol X W J ~ T M F Description Hazardous voltage. Risk of electrical shock. Important information. Risk of danger.
345 Users Manual Safety Instructions Please read this section carefully. It will familiarize you with important safety instructions for handling your Clamp Meter. In this manual a Warning identifies conditions and actions that pose hazard(s) to the user. A Caution identifies conditions and actions that may damage the test instrument. The design and manufacture of the device conforms to the latest state of technology and the safety standards specified in IEC 61010-1/ 2nd edition.
Power Quality Clamp Meter Safety Instructions • Before use, inspect the Clamp Meter, voltage probes, test leads, and accessories for mechanical damage, and replace if damaged. Look for cracks or missing plastic. Pay special attention to the insulation surrounding the connectors. • Avoid working alone when working with live circuits. • Use only insulated test leads and adapters as supplied with the Clamp Meter, or indicated as suitable for the Fluke 345 Clamp Meter.
345 Users Manual Specifications Electrical Data All accuracies specified at 23 °C ± 1 °C Temperature coefficient of current ≤ ±0.15 % of rdg per °C Temperature coefficient of voltage ≤ ±0.15 % of rdg per °C Current Measurement (DC, DC RMS, AC RMS) Measuring range................................................. 0 – 2000 A dc, 1400 ac rms Autorange facility ................................................ 40 A / 400 A / 2000 A Resolution...........................................................
Power Quality Clamp Meter Specifications Harmonics THD (Total Harmonic Distortion) 1 % ≤ THD 1 % to 100 %:............................... ± 3 % rdg ± 5 digits 100 % to 600 %: ............................................. ± 5 % rdg ± 5 digits Resolution....................................................... 0.1 % DF (Distortion Factor) 1 % ≤ DF < 100 % ......................................... ± 3 % rdg ± 5 digits Resolution....................................................... 0.1 % H02 ≤ Iharm < H13......
345 Users Manual Harmonics THD (Total Harmonic Distortion) 1 % ≤ THD < 100 %........................................ ± 3 % rdg ± 5 digits 100 % ≤ THD < 600 %.................................... ± 5 % rdg ± 5 digits Resolution....................................................... 0.1 % DF (Distortion Factor) 1 % ≤ DF < 100 % .......................................... ± 3 % rdg ± 5 digits Resolution....................................................... 0.1 % H02 ≤ Vharm < H13 ...............................
Power Quality Clamp Meter Specifications VAR Measurement (Single and 3 Phase) Measuring range................................................. 0 – 1200 kVAR Autorange facility ................................................ 4 kVAR, 40 kVAR, 400 kVAR, 1200 kVAR Resolution........................................................... 1 VAR in 4 kVAR range 10 VAR in 40 kVAR range 100 VAR in 400 kVAR range 1 kVAR in 1200 kVAR range Accuracy VAR > 4 kVAR ................................................ ± 2.
345 Users Manual Accuracy kWHr > 2 kWHr .............................................. ± 3 % ± 5 digits kWHr < 2 kWHr .............................................. ± 0.08 kWHr All Watts /VA /VAR /PF measurements Frequency range ............................................ DC and 15 Hz to 1 kHz Current range ................................................. 10 A to 1400 A rms Voltage range ................................................. 1 V to 825 V rms Maximum input ......................................
Power Quality Clamp Meter Specifications Inrush Current Function Ranges ............................................................... 40, 400 and 2000 A Resolution........................................................... 10 mA in 40 A range 100 mA in 400 A range 1 A in 2000 A range Accuracy I > 10 A .......................................................... ± 5 % rdg ± 1 pixel I < 10 A ........................................................... ± 0.
345 Users Manual Logging Times: Average Time 1s 2s 5s 10 s 30 s 1 min 5 min 10 min 15 min Average Time 1s 2s 5s 10 s 30 s 1 min 5 min 10 min 15 min Average Time 1s 2s 5s 10 s 30 s 1 min 5 min 10 min 15 min 10 Volts and Current Mode Logging Time (1 area) 1 h 49 m 3 h 38 m 9 h 06 m 18 h 12 m 2 d 06 h 36 m 4 d 13 h 12 m 22 d 18 h 00 m 45 d 12 h 00 m 68 d 06 h 00 m V & A Harmonics Mode Logging Time (1 area) 0 h 34 m 1 h 08 m 2 h 52 m 5 h 44 m 17 h 13 m 1 d 10 h 26 m 7 d 04 h 10 m 14 d 08 h 20 m 21 d 12 h 3
Power Quality Clamp Meter Specifications General Data Display Color transmissive LCD 320 x 240 pixels (70 mm diagonal) with 2 level backlight. Power Supply Battery type 1.5 V Alkaline AA NEDA 15A or IEC LR6 x 6 Battery life typically: >10 hours (backlight on full) >12 hours (backlight reduced) Battery Eliminator BE345 Input................................................................ 110V / 230V, 50/60 Hz Output ............................................................
345 Users Manual Qualified Personnel Adequate personnel qualifications are the following: • Trained and authorized to switch on/off, earth ground, and mark power distribution circuits and devices in accordance with the safety standards of electrical engineering. • Training or instruction in accordance with the standards of the safety engineering in maintenance and use of appropriate safety equipment. • Training in first aid.
Power Quality Clamp Meter Warranty Do not use the device for any purpose other than measuring of voltages and currents that are within the measuring ranges and categories, including voltage to earth ground, as specified in “Technical Information” section. Improper use of the device shall void the warranty. Warranty The warranty period for fault free operation is limited to 1 year from the date of purchase.
345 Users Manual Device Shutdown • If you detect any damage to the housing, controls, power cable, connecting leads, or connected devices, immediately disconnect the unit from the power supply. • If you are in doubt regarding the safe operation of the device, immediately shut down the Clamp Meter and the respective accessories, secure them against inadvertent switching on, and bring them to an authorized service agent. Maintenance and Repairs 14 • Do not open the housing.
Power Quality Clamp Meter Measuring Inputs and Power Adapter Measuring Inputs and Power Adapter Voltage Measuring Input The maximum input voltage for over-voltage category CAT IV may not exceed 600 V to earth ground (825 V line to line voltage). Figure 1 shows the voltage measuring input of the Clamp Meter. COM V 600V eln02.eps Figure 1. Voltage Measuring Input Note • Do not remove any covers other than the cover of the battery compartment. • Refer all servicing to qualified personnel.
345 Users Manual W X Warning • Use only the power supply, Battery Charger/Power Adapter (Model BE345). • Before use check that the selected voltage range indicated on the BE345 matches the local line power voltage and frequency (refer to Figure 2). If necessary, set the slider switch of the BE345 to the correct voltage. • For the BE345, use only ac line plug adapters or ac line cords that comply with local safety regulations.
Power Quality Clamp Meter Design and Functions Front View Figure 4 shows the front view of the 345 Power Quality Clamp Meter. Colour display transmissive LCD 320 x 240 pixels (70mm diagonal) Function Selector Turn for required measurement function Tactile Barrier Record / Measure key selects measurement or recording function Menu / Esc access menu or go up one menu level.
345 Users Manual Rear and Side View Figure 5 shows the rear and side view of the 345 Power Quality Clamp Meter. Current Clamp Tactile Barrier Current Clamp trigger DC Power Input Current Cover USB Port eln05.eps Figure 5.
Power Quality Clamp Meter Using the Clamp Meter Using the Clamp Meter Check the Shipment Before using the Clamp Meter for the first time, ensure the shipment is complete using the following list and the delivery specifications: • 1 345 Power Quality Clamp Meter • 1 Users Manual • 1 Battery Charger/Power Adaptor (BE345) • 1 set of voltage measuring leads • 1 CD-ROM containing software • 1 USB cable for connection to PC • 1 carrying case Preparing Clamp Meter for Use Follow the safety instructi
5 Users Manual Note The Clamp Meter operates from standard alkaline cells. The batteries are bypassed when the mains adaptor is plugged in to the Clamp Meter and a power source. Rechargeable cells cannot be charged inside the instrument. Switching the Clamp Meter On To turn on the Clamp Meter: 1. Turn the central rotary selector to selected measurement position. 2. The device is now ready for operation. Figure 6 displays the battery life screen following start-up. eln06.bmp Figure 6.
Power Quality Clamp Meter Connection to Circuits Switching the Device Off To switch the device off: 1. Turn the rotary switch to the OFF position. 2. If the device is not to be used for a prolonged period of time, disconnect the power adaptor, and store the Clamp Meter and accessories in the supplied carrying case.
345 Users Manual Overview The Clamp Meter offers the following options for connection: • Single-phase connection for voltage measurement. • Single-phase connection for current measurement. • Single-phase connection for power measurement. • Three-phase connection for balanced power. Voltage and Current Measurements W X Warning You could be seriously injured when touching connections, internal circuits, and measuring devices that are not properly connected to earth ground.
Power Quality Clamp Meter Connection to Circuits eln07.eps Figure 7.
345 Users Manual Single Phase Power Measurement Connection The Clamp Meter is well designed for measurement of single-phase power networks. Figure 8 shows the required connections for single-phase power measurement. eln08.eps Figure 8.
Power Quality Clamp Meter Connection to Circuits Note Carefully observe the direction of the current flow on the top of the Clamp Meter. Note Always adhere to the instructions regarding the sequence of connection. Balanced Three-Phase Power Measurement Connection In three-phase power networks where the load may be considered to be balanced, the Clamp Meter may be used to make some basic measurements such as watts, VA, PF, and kWHr. Note This measurement is only suitable for balanced loads.
345 Users Manual eln09.bmp Figure 9. Three-Phase Power Connection Note Always adhere to the instructions regarding the sequence of connection. Configuration Operating Controls and Display This section familiarizes you with some basic control elements, such as the display and the connections for the Clamp Meter. The Clamp Meter is turned on and off by rotating the central selector switch. Turn the selector clockwise for ON and counterclockwise to turn OFF.
Power Quality Clamp Meter Configuration Display Symbols Figure 10 details the display symbols of the Clamp Meter.
345 Users Manual Navigation and Measuring Keys All basic adjustments of the Clamp Meter are made through the main menu. Table 2 shows the keys and their respective functions. Table 2.
Power Quality Clamp Meter Measurement Setup eln11.bmp Figure 11. Navigation through the Display Measurement Setup Basic Adjustments Required before Measuring Before making measurements, some basic items must be considered, such as: Auto Power Down: Select OFF (or ON to conserve battery life). Voltage ranging: Voltage range may be selected for automatic or manual operation (4 V, 40 V, 400 V and 750 V).
345 Users Manual Additional instrument settings include: Low pass filter: Switch low pass filter ON or OFF to eliminate high frequency noise. PF/DPF Mode: Select either Power Factor or Displacement Power Factor. PF/DPF Display: Select displayed Power Factor. Harmonics type: Select either %H1 (fundamental) or %RMS. Date and Time: For time and date stamping of logged data. Voltage Range Settings To select either manual or automatic voltage ranging: 1. Press JK until Voltage Range is selected. 2.
Power Quality Clamp Meter Measurement Setup Current Range Settings To select either manual or automatic current ranging: 1. Press JK until Current Range is selected. 2. Press FG to change the setting. The available choices are AUTO, 40 A, 400 A, and 2000 A. 3. Press E to confirm selection. 4. To exit without changing, press M. Figure 13 shows the current range settings for the Clamp Meter. eln15.bmp Figure 13.
345 Users Manual Figure 14 shows the available additional instrument settings for the Clamp Meter. eln16.bmp Figure 14. Additional Instrument Settings Menu The items available in the additional Instrument Settings are: • Low Pass Filter • PF/DPF Mode • PF/DPF Display • Harmonics Type • Buzzer Volume These items may be changed by using the FG keys. Press E to confirm selections, or press M to exit without changing.
Power Quality Clamp Meter Measurements Figure 15 shows the items available in the additional instrument settings. eln17.bmp Figure 15. Additional Instrument Setting Items Measurements Measurement Tips Displaying Measurements When the Clamp Meter is in measurement mode, generally more than one set of the measurements will be available. Note For more details, refer to each measuring mode in the “Measuring Functions Overview” section.
345 Users Manual Is activated with J Is activated with G Is activated with F Is activated with K Indicates there are no other active screens The required measurement parameters can be displayed by pressing their associated keys. Saving Measurement Screens During the measurement process, the display may be capture for viewing or later download. To save a measurement screen: 1. 34 Press E to initiate screen saving. The following message is displayed.
Power Quality Clamp Meter Measurements eln18.bmp 2. Press E to accept the screen displayed. The screens are saved sequentially in the available memory locations. There are a total of 50 locations available. The saved screen may be managed, that is, viewed and deleted, using the main menu.
345 Users Manual eln19.bmp 3. Press JK to select the screen required for viewing; recall the screen by pressing E when the saved screen is highlighted. 4. Press E and the saved screen is displayed. W Note A warning is displayed at the top of the screen to indicate that the readings are not the active measurements. Screens may also be deleted in this mode. Logging Tips The Clamp Meter allows three kinds of Logging, and logged data is made up of average values.
Power Quality Clamp Meter Measurements Note The Auto ranging option is initially highlighted, although it is recommended that the Auto ranging be switched off. Otherwise, if the instrument re-ranges during the recording scaling, there may be a gap in the recording as the instrument stabilizes. Step 1 – Instrument Setup: To setup the instrument: 1. Select an item using JK andFG. 2. Press H to go to the next step as shown in the following display. eln21.bmp 3.
345 Users Manual The Battery Save function is still available when recording without the power adaptor connected. This function is switched on or off using the FG keys. In this mode the instrument switches itself off after approximately 5 minutes to preserve battery power. The initiation of the power down function is indicated by an intermittent audible bleep.
Power Quality Clamp Meter Measurements Logged data is made up of averaged values. There are standard averaging times of 1, 2, 5, 10, 30 seconds and 1, 5, 10 and 15 minutes. Additionally, it is possible to customize the averaging time from 1 second to 900 seconds in 1second steps. The averaging time is selected by highlighting the item Averaging Time and using the FG keys to select the required time, as shown in the following display. eln23.
345 Users Manual eln24.bmp During the logging, the available measurements (and logged values) may be accessed using the navigation keys (see “Navigation and Measuring Keys” section). During the logging, the average values (the minimum and maximum values) are recorded for each average period, as shown in the following display. eln25.
Power Quality Clamp Meter Measurements The minimum and maximum values are based on half-cycle RMS values. Minimum and maximum values are indicated by blue and red triangles on the respective graphed values. During logging, the headline bar is highlighted in red. Logging may be stopped by pressing R and a message Stop Logging? is displayed; to halt logging, press E key as shown in the following display. eln26.
345 Users Manual eln27.bmp The log number and type of recording is shown with date and time stamp. The logged data may be downloaded from the Clamp Meter via the USB cable and analyzed in detail on a PC using the supplied Power Log software package included on the CD. Measurement Function Overview Measurement modes are selected using the central rotary switch. Voltage Measurements The measurements available in measurement mode are described in Table 3.
Power Quality Clamp Meter Measurement Function Overview Table 3. Voltage Measurements Measurement Notation RMS voltage V rms dc voltage V dc ac voltage V ac Average voltage V avg Peak voltage V pk Volts frequency ratio V/Hz Voltage ripple %RPL Voltage crest factor CF Frequency Hz Scales and Ranging Auto ranging or Manual Associated Items and Comments Minimum and maximum of all values. Recording of average values available.
345 Users Manual Two major values are displayed initially. Additional values may be accessed by pressing J, which displays the following six-value screen. eln29.bmp Return to the previous screen by pressing K. The Minimum/Maximum value screens may be accessed by pressing R. The live value will be displayed initially. In addition, the time (or Run Time) elapsed since the time the button was pressed will be indicated above the measurement in green text.
Power Quality Clamp Meter Measurement Function Overview Current Measurement The measurements available in Current Measurement mode are described in Table 4. Table 4. Current Measurements Measurement Notation RMS current A rms dc current A dc ac current A ac Average current A avg Peak current A pk Current/frequency ratio A/Hz Current ripple %RPL Scales and Ranging Auto ranging or Manual Associated Items and Comments Frequency also indicated. Minimum and maximum of all values.
345 Users Manual This measuring function shows the voltages and currents in oscilloscope form, as well as their instantaneous values at the cursor position. This function clearly represents current and voltage waveforms and any distortion present. On entry to Waveforms mode, the time base is set to 5 ms/div. The symbol B is shown next to this setting to indicate that a 2 sec press of the HOLD/RUN button will change the setting. So long as a plus sign is shown, the sweep speed can be increased.
Power Quality Clamp Meter Measurement Function Overview The single scale display shows the waveforms at maximum magnification with the V and A scales at either side of the waveforms, as shown in the following display. eln31.bmp The measurement cursor may be positioned using the keys FG and the time (T=n ms) is indicated on moving the marker. LHarmonics Harmonics are sinusoidal voltage and current with a frequency that corresponds to an integer multiple of the fundamental of the mains (line) voltage.
345 Users Manual Table 6. Harmonics Measurements Measurement Voltage harmonics Notation Vfund to V40th 1st to the 40th Current harmonics Vfund to V40th Scales and Ranging Associated Items and Comments Adjustable zoom scale (100 %, 40 %, 10 % and 4 %) RMS parameter, THD, individual harmonic value (V, A or W) or as % of fundamental or % of distortion factor 1st to the 40th On first selecting the harmonics mode the ac RMS voltage and % distortion factor are displayed as shown following display.
Power Quality Clamp Meter Measurement Function Overview The second screen shows the fundamental voltage ac (V ac [1]) and %THD as shown in the following display. eln33.bmp As shown below in the A Harmonics screen, AUTO indicates the percentage is automatically scaled to the max of H (2) and above. Pressing the H key for 3 seconds allows the scaling between values of 100 %, 40 %, 10 %, or 4 %, and then back to AUTO.
345 Users Manual Fundamental value Measured value selected by cursor indicates % scale has been selected automatically H(1) / Fundamental H(0) DC component indicates whether % scale magnification is available eln34.eps A- detailed picture for current harmonics is presented in the same way. The point at which input is over- or under-range is displayed as measured values in the following V Harmonics screen example.
Power Quality Clamp Meter Measurement Function Overview eln35.bmp The scale is automatically set to 100 % and the overload (OL) symbol is displayed. Harmonic Recording Harmonic recording mode has two separate modes: Mode Recorded Harmonics V (Voltage) Vfund to V40th A (Current) Ifund to I40th On entering the logging mode while still measuring harmonics, the mode voltage (V) or current (A) must be selected, as shown in the following LogHarmonics screen.
345 Users Manual eln36.bmp The length of the time taken for recording will depend on the mode and recording area chosen. The type of harmonics to be logged, %H1 or %RMS, can also be selected. Unlike other recording modes, the recorded parameter is not shown as a line recording against time on the instrument display.
Power Quality Clamp Meter Measurement Function Overview eln37.bmp The upper part of the orange bar is the maximum value of the harmonic, and the lowest part of the orange bar is the minimum value measured during the logging period. The elapsed time of the logging period is displayed as Run Time on the display. The cursor may be moved left or right to select individual harmonics from dc to the 40th harmonic. Figure 16 shows the detailed view of the harmonic recording display. eln38.bmp Figure 16.
345 Users Manual WPower The measured power and associated variables for this function are described in Table 7. Table 7.
Power Quality Clamp Meter Measurement Function Overview The measurement displays in the power mode offer all the available measurements on one screen as shown in the following display. eln39.bmp Initiating power logging is the same process used in the V and A modes. Energy measurements are available while logging or REC mode. Since W is a signed value, WHr can go up or down, and can be either side of the zero axis. The same is true of VARHr as shown in the following display.
345 Users Manual eln40.bmp VA and AHr is unsigned, so can never decrease and never be below the zero axis as shown in the following display. eln41.
Power Quality Clamp Meter Measurement Function Overview XThree-Phase Power The three-phase power measurement and associated variables for this function are described in Table 8. Table 8.
345 Users Manual This mode should only be used for balanced three-phase power; only one current-phase and two separate voltage-phases are considered accurate since true three-phase power cannot be guaranteed. The connected load must be well balanced, and connected in either Wye or Delta. This method will not provide accurate results where there is power distortion present. For convenience on selecting this mode, a connection diagram is displayed on the Clamp Meter as shown in the following display. eln42.
Power Quality Clamp Meter Measurement Function Overview eln43.bmp Press R to continue to enter the setup menu and the following screen is displayed. eln44.
345 Users Manual On this Log-Inrush Current setup screen, the peak current present at the instrument terminals is displayed (Max peak current) to provide guidance for the required trigger levels. The current-trigger level may be selected from either a preset value of 0.5, 1, 3, 10, 30, 100, or 300 A, or a customized value from 0 to 1000 A in 0.1 A steps. The capture time may also be chosen from 1, 3, 10, 30 100, or 300 seconds.
Power Quality Clamp Meter Measurement Function Overview The Clamp Meter now waits for the trigger (current exceeding the preset level) as shown in the following display. eln46.bmp Once the trigger level is exceeded, the instantaneous values are drawn on the display and the message Capturing… appears as shown below. eln47.
345 Users Manual Once the inrush event is complete (that is, the capture time has elapsed), the message WARNING – SCREEN NOT LIVE flashes at the top of the display. The Trace value is incremented accordingly as shown in the following display. In the following example, there are 5 traces stored. eln48.bmp Stored traces may be reviewed using the right and left the cursor keys. The inrush event may now be analyzed by moving the cursor across the captured signal using the FG keys.
Power Quality Clamp Meter Measurement Function Overview eln49.bmp Once the cursor is in position, the blue marker can be shifted to that position by pressing the H key. The cursor may now be moved again and the relative time (T=) will be indicated below the graph, as shown in the following display. eln50.
345 Users Manual If additional inrush events are to be captured after exiting the inrush mode, these may be appended to an existing record by choosing a logging area that already contains inrush events, as in the screen displayed below. Alternatively, the old records may be overwritten by selecting the Inrush Logging item and choosing the NEW option (not shown). eln51.
Power Quality Clamp Meter Measurement Function Overview eln52.bmp Once in the View Logged Data sub-menu, select the appropriate record and press E to view the available recordings, as shown in the following display. eln53.
345 Users Manual Initially, Trace 1 of the inrush logged data will be displayed, as indicated in the example below. eln54.bmp It is possible to scroll through the captured traces by pressing the up and down cursor, or J or K keys. On selecting the saved inrush recording, captured screens may be viewed and analyzed in exactly the same way as described previously for the capture process.
