ENGLISH. User manual.
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1 ENGLISH User manual Copyright HT ITALIA 2011 Release EN /05/2011
2
3 Table of contents: EN - 1 HT PRECAUTIONS AND SAFETY MEASURES Preliminary instructions During use After use Definition of measurement (overvoltage) category GENERAL DESCRIPTION Measuring average values and TRMS values Definition of true root mean square value and crest factor Harmonics PREPARATION FOR USE Initial checks Instrument power supply Calibration Storage OPERATING INSTRUCTIONS Instrument description Description of the controls Alignment marks Hand protection Indication of the conventional direction of Current Description of the keys Keys F1 F2 F3 F Key H Key Initial screen INSTRUMENT FUNCTIONS Phase detection Settings position: Instrument settings General Date/Time Log InRush Continuity Position V : DC, AC+DC voltage measurement and phase sequence verification DC voltage measurement Key F4 Fnz Hold Backlight AC+DC voltage and Voltage Harmonics measurement Key F2 Par AC+DC voltage Key F4 Fnz in AC+DC voltage measurement Voltage harmonics Key F4 Fnz in Voltage Harmonics measurement Hold Backlight Checking phase sequence and phase concordance with a lead Verification of Phase Sequence Verification of Phase Concordance Position A : DC, AC+DC current measurement DC current measurement Key F4 Fnz Hold Backlight AC+DC current and Current Harmonics measurement Key F2 Par AC+DC current Key F4 Fnz in AC+DC current measurement Current harmonics Key F4 Fnz in Current Harmonics measurement Hold Backlight... 27
4 5.5. Position W : DC, AC+DC power measurement DC power measurement Key F2 Par DC power Key F4 Fnz in DC Power measurement DC voltage and current Key F4 Fnz in DC Voltage and Current measurement DC Energy Hold Backlight Measurement of AC 1P or AC 3P Powers Key F2 Par AC+DC power Pf and dpf Key F4 Fnz in Power or Pf-dPf measurement AC+DC Voltage and Current Key F4 Fnz in AC Voltage and Current measurement Voltage harmonics Current harmonics Key F4 Fnz in Voltage and Current Harmonics measurement AC Energy Hold Backlight Position W : Log, On-Line Scope, SnapShot, MemorY, Download Key F3 Sys Start Log recording On-line Memory SnapShot Download Position Ω : Resistance and continuity measurement Key F4 Fnz Hold Backlight Position InRush A : inrush current measurement Virtual key Zero Key F3 Run Key F4 Mem MAINTENANCE General information Battery replacement Cleaning the instrument End of life TECHNICAL SPECIFICATIONS Technical characteristics Safety standards General characteristics ENVIRONMENT Environmental conditions for use Accessories provided SERVICE Warranty conditions Service APPENDIX THEORETICAL OUTLINE Calculation of powers in AC 1P mode Calculation of powers in AC 3P mode Calculation of powers in DC mode voltage and current harmonics Limit values for harmonics Causes of the presence of harmonics Consequence of the presence of harmonics EN - 2
5 1. PRECAUTIONS AND SAFETY MEASURES HT9022 The instrument has been designed in compliance with directive IEC/EN relevant to electronic measuring instruments. For your safety and in order to prevent damaging the instrument, please carefully follow the procedures described in this manual and read all notes preceded by the symbol with the utmost attention. Before and after carrying out the measurements, carefully observe the following instructions: Do not carry out any voltage or current measurement in humid environments. Do not carry out any measurements in case gas, explosive materials or flammables are present, or in dusty environments. Avoid contact with the circuit being measured if no measurements are being carried out. Avoid contact with exposed metal parts, with unused measuring probes, circuits, etc. Do not carry out any measurement in case you find anomalies in the instrument such as deformation, breaks, substance leaks, absence of display on the screen, etc. Pay special attention when measuring voltages higher than 20V, since a risk of electrical shock exists. In this manual, and on the instrument, the following symbols are used: Warning: observe the instructions given in this manual; an improper use could damage the instrument or its components. High voltage danger: electrical shock hazard. Double-insulated meter AC voltage or current DC voltage or current Connection to earth EN - 3
6 1.1. PRELIMINARY INSTRUCTIONS This clamp has been designed for use in environments of pollution degree 2. It can be used for CURRENT and VOLTAGE measurements on installations with measurement category CAT IV 600V and CAT III 1000V. For a definition of measurement categories, see 1.4. We recommend following the normal safety rules devised by the procedures for carrying out operations on live systems and using the prescribed PPE to protect the user against dangerous currents and the instrument against incorrect use. Only the leads supplied with the instrument guarantee compliance with the safety standards. They must be in good conditions and replaced with identical models, when necessary. In case the lack of warning against the presence of voltage may constitute a danger for the operator: 1. always carry out a continuity measurement before carrying out the measurement of the live system to confirm the correct connection and condition of the leads; 2. before carrying out the critical measurement, carry out a measurement at a power socket where voltage is surely present. As an alternative, make this verification at your site before going to the unknown measuring point. Do not test circuits exceeding the specified current and voltage limits. Check that the battery is correctly inserted. Before connecting the test leads to the circuit to be tested, make sure that the switch is correctly set. Make sure that the LCD display and the switch indicate the same function DURING USE Please carefully read the following recommendations and instructions: WARNING Failure to comply with the Caution notes and/or Instructions may damage the instrument and/or its components or be a source of danger for the operator. Before activating the switch, remove the conductor from the clamp jaw or disconnect the test leads from the circuit under test. When the instrument is connected to the circuit under test, do not touch any unused terminal. Keep your hands always under the hand protection. This protection is always located in a suitable position to guarantee a correct safety distance from possible exposed or live parts (see Fig. 3: hand protection Avoid measuring resistance if external voltages are present. Even if the instrument is protected, excessive voltage could cause a malfunction of the clamp. During current measurement, any other current near the clamp may affect measurement precision. When measuring current, always put the conductor as near as possible to the middle of the clamp jaw, to obtain the most accurate reading. While measuring, if the value or the sign of the quantity being measured remain unchanged, check if the HOLD function is enabled AFTER USE When measurement is complete, switch OFF the instrument. If the instrument is not to be used for a long time, remove the batteries. EN - 4
7 1.4. DEFINITION OF MEASUREMENT (OVERVOLTAGE) CATEGORY Standard CEI 61010: Safety requirements for electrical equipment for measurement, control and laboratory use, Part 1: General requirements defines what measurement category, commonly called overvoltage category, is. In 6.7.4: Measured circuits, circuits are divided into the following measurement categories: (OMISSIS) Measurement category IV is for measurements performed at the source of the low-voltage installation. Examples are electricity meters and measurements on primary overcurrent protection devices and ripple control units. Measurement category III is for measurements performed on installations inside buildings. Examples are measurements on distribution boards, circuit breakers, wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial use and some other equipment, for example, stationary motors with permanent connection to fixed installation. Measurement category II is for measurements performed on circuits directly connected to the low-voltage installation. Examples are measurements on household appliances, portable tools and similar equipment. Measurement category I is for measurements performed on circuits not directly connected to MAINS. Examples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS-derived circuits. In the latter case, transient stresses are variable; for that reason, the standard requires that the transient withstand capability of the equipment is made known to the user. EN - 5
8 2. GENERAL DESCRIPTION The clamp meter HT9022 carries out the following measurements: DC voltage and AC+CD TRMS voltage DC current and AC+CD TRMS current Phase sequence Active, reactive, apparent power and power factor on single-phase and/or balanced three phase systems Active, reactive, apparent energy on single-phase and/or balanced three-phase systems AC voltage harmonics (1 st 25 th ) and THD% up to 75Hz (1 st 8 th above 75Hz) AC current harmonics (1 st 25 th ) and THD% up to 75Hz (1 st 8 th above 75Hz) DC power Frequency on voltage (leads) and current (clamp jaw) Resistance and continuity test with buzzer Electric motor starting currents (INRUSH) Detection of presence of AC voltage with and without contact with in-built sensor in the clamp jaw Each of these functions can be selected using the 7-position selector switch, including an OFF position. Keys F1, F2, F3, F4 e H / are also provided; for their use, please refer to 4.2. EN - 6
9 2.1. MEASURING AVERAGE VALUES AND TRMS VALUES Measuring instruments of alternating quantities are divided into two big families: AVERAGE-VALUE meters: instruments measuring the value of the sole wave at fundamental frequency from 10 to 400Hz TRMS (True Root Mean Square) VALUE meters: instruments measuring the TRMS value of the quantity being tested. In the presence of a perfectly sinusoidal wave, the two families of instruments provide identical results. In the presence of distorted waves, instead, the readings shall differ. Average-value meters provide the RMS value of the sole fundamental wave, TRSM meters, instead, provide the RMS value of the whole wave, including harmonics (within the instrument s bandwidth). Therefore, by measuring the same quantity with instruments from both families, the values obtained are identical only if the wave is perfectly sinusoidal. In case it is distorted, TRMS meters shall provide higher values than the values read by average-value meters DEFINITION OF TRUE ROOT MEAN SQUARE VALUE AND CREST FACTOR The root mean square value of current is defined as follows: "In a time equal to a period, an alternating current with a root mean square value of the intensity of 1A, circulating on a resistor, dissipates the same energy that, during the same time, would have been dissipated by a direct current with the intensity of 1A". This definition results in the numeric expression: t0 +T 1 2 G= g ( t) dt T t0 The root mean square value is indicated with the acronym RMS. The Crest Factor is defined as the relationship between the Peak Value of a signal and its G p RMS value: CF (G)= GRMS This value changes with the signal waveform, for a purely sinusoidal wave it is 2 =1.41. In case of distortion, the Crest Factor takes higher values as wave distortion increases HARMONICS See Appendix (Par.9.4) EN - 7
10 3. PREPARATION FOR USE HT INITIAL CHECKS Before shipping, the instrument has been checked from an electric as well as mechanical point of view. All possible precautions have been taken so that the instrument is delivered undamaged. However, we recommend generally checking the instrument in order to detect possible damage suffered during transport. In case anomalies are found, immediately contact the forwarding agent. We also recommend checking that the packaging contains all components indicated in paragraph 7.3. In case of discrepancy, please contact the Dealer. In case the instrument should be replaced, please carefully follow the instructions given in chapter INSTRUMENT POWER SUPPLY The instrument is supplied by two 1.5V LR03 AAA UM-4 batteries. Battery charge duration is approximately 54 hours of continuous use in Power mode (selector switch to W ). Replace them following the instructions in paragraph CALIBRATION The instrument has the technical specifications described in this manual. The instrument s performance is guaranteed for one year STORAGE In order to guarantee precise measurement, after a long storage time under extreme environmental conditions, wait for the instrument to come back to normal condition (see the environmental specifications contained in before use). EN - 8
11 4. OPERATING INSTRUCTIONS 4.1. INSTRUMENT DESCRIPTION Description of the controls CAPTION: 1. Inductive clamp jaw 2. AC voltage indicator LED 3. Jaw trigger 4. Rotary selector switch 5. Key H / backlight 6. Function keys F1 F2 F3 F4 7. LCD display 8. Input terminal VΩ 9. Input terminal COM Fig. 1: Instrument description Alignment marks Put the conductor as close as possible to the middle of the jaws on the intersection of the indicated marks (see Fig. 2) in order to meet the meter accuracy specifications. CAPTION: 1. Alignment marks 2. Conductor Fig. 2: alignment marks EN - 9
12 Hand protection CAPTION: 1. Hand protection 2. Safe area Fig. 3: hand protection Always keep your hands under the hand protection. This protection is always located in a suitable position to guarantee a correct safety distance from possible exposed or live parts (see Fig. 3) Indication of the conventional direction of Current The photo in Fig. 4: current direction arrow shows an arrow which indicates the conventional direction of current. Fig. 4: current direction arrow 4.2. DESCRIPTION OF THE KEYS Keys F1 F2 F3 F4 Keys F1 - F2 - F3 - F4 take different functions according to the measure set (for detailed information, see the single functions) Key H Short pressing key H activates the function Data HOLD, i.e. the value of the measures quantity is frozen. The symbol "H" is displayed when this function is enabled. This operating mode is disabled when key H is pressed again or the switch is operated Key To improve the readability of the values measured in dark places, the display has been provided with a backlighting function (backlight), which is turned on and off by longpressing key H. This function automatically deactivates after approximately 10 seconds after being activated, in order not to discharge the battery. EN - 10
13 4.3. INITIAL SCREEN When switching on the instrument, the initial screen appears for a few seconds. It shows: the instrument model; the serial number of the instrument; the firmware version in the instrument s memory. HT9022 Sn V WARNING Please note down this information, especially the firmware version, in case it should be necessary to contact the Service Department. After a few seconds, the instrument switches to the selected function. EN - 11
14 5. INSTRUMENT FUNCTIONS HT PHASE DETECTION With the selector switch set to V (Voltage measurement) or A (Current measurement), by taking the end of the clamp jaw near an AC source, the red LED at the base of the clamp jaw will turn on (see Fig. 1 part 2), which indicates that current is present. WARNING Phase detection is not active when the clamp selector switch is set to OFF, SETTINGS, W, Ω, InRush A SETTINGS POSITION: INSTRUMENT SETTINGS By positioning the selector switch to Settings, the screen aside will appear, containing the possible settings of the instrument. Press keys F2, F3 (, ) to move the cursor and key F4 (OK) to confirm the selected item. OK General Date/Time Log InRush Continuity General By selecting General, the screen to the side will appear. Press key F1 (Sel) to move the cursor and keys F2, F3 (, ) to change the selected item. Press key F4 (OK) to save the changes made and go back to the previous screen (see par.5.2). Language: the language of the clamp may be chosen among: Italian, English, Spanish. German, Swedish, Danish, Norwegian, French, Dutch, Portuguese, Finnish and Polish. Sel OK Language: Italian Auto-Off: OFF Auto-Off: the auto power off of the clamp may be set to ON or OFF. If set to ON, the clamp will switch off after 5 minutes after it is last used Date/Time By selecting Date/Time, the screen to the side will appear. Press key F1 (Sel) to move the cursor and keys F2, F3 (, ) to change the selected item. Item Format allows selecting the date and time format between EU (European) or USA (American). Press key F4 (OK) to save the changes made and go back to the previous screen (see par.5.2). Sel OK Year: 11 Month: 01 Day: 19 Hour: 17 Minute: 00 Format: EU EN - 12
15 Log By selecting Log, the screen to the side will appear. Press keys F2, F3 (, ) to change the duration of the integration period. It will take the following values: 1, 5, 10, 30, 60, 120, 300, 600 or 900 seconds. Press key F4 (OK) to save the changes made and go back to the previous screen (see par.5.2) InRush By selecting InRush, the screen to the side will appear. Press key F1 (Sel) to move the cursor and keys F2, F3 (, ) to change the selected item. Press key F4 (OK) to save the changes made and go back to the previous screen (see par.5.2). Thresh: threshold value beyond which the inrush current event is detected and recorded by the instrument. The current value may be set between 5A and 900A in steps of 1A. OK Int.Period: 001 s Sel OK Thres: 080 Window: 1/1 Mode: Fix Window: the value of the inrush current measuring window. The following values are available: 1/1: sampling occurs every half-period; 1/2: sampling occurs one every two half-periods; 1/4: sampling occurs one every four half-periods; Mode: the inrush current measuring mode. Following modes are available: Fix; Var. For details about the measurement of Inrush Currents see par Continuity By selecting Continuity, the screen to the side will appear. Press keys F2, F3 (, ) to change the setting of the resistance limit value below which the buzzer will sound. It may be set between 1Ω and 150Ω in steps of 1Ω. Press key F4 (OK) to save the changes made and go back to the previous screen (see par.5.2). Sel OK Res Lim: 010 Ω EN - 13
16 5.3. POSITION V : DC, AC+DC VOLTAGE MEASUREMENT AND PHASE SEQUENCE VERIFICATION WARNING The maximum DC or AC+DC input voltage is 1000V. When the display shows > 999.9V, it means that the maximum value the clamp is able to measure has been exceeded. Exceeding these limits could result in electrical shocks to the user and damage to the instrument. Mod Par Fnz AC <10.0 Hz By positioning the selector switch to V will appear., the screen to the side ---- V Press key F1 (Mod) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F1, the cursor will scroll through the available items, as follows: AC: AC+DC voltage measurement; DC: DC voltage measurement; Ph Seq: verification of phase sequence; Help: it displays the connection diagram of the instrument to the system; Select the desired mode and press key F4 (OK) to confirm DC voltage measurement Mod Par AC AC DC Ph Seq Help Esc OK <10.0 Hz ---- V Fig. 5: DC voltage measurement EN - 14
17 Insert the red cable into the input lead VΩ and the black cable into the input lead COM (Fig. 5), and position the leads to the desired points of the circuit being tested. Mod Par Fnz DC The screen shows an example of DC Voltage measurement V Key F4 Fnz Press key F4 (Fnz) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F4, the cursor will scroll through the available items, as follows: Max: it constantly displays the maximum value of the measured DC Voltage; Min: it constantly displays the minimum value of the measured DC Voltage; Cr+: it constantly displays the maximum positive crest value; Cr-: it constantly displays the minimum negative crest value; Rst: it deletes all stored Max, Min, Cr+ and Cr- values; Esc: it goes back to a normal measuring mode. Mod Par OK Fnz DC Max Min Cr V Cr- Rst Esc WARNING Note: the measurement of the 4 Max, Min, Cr+ and Cr- values is simultaneous, regardless of the one displayed. By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function. Mod Par Fnz Max DC 12.0 V Hold Short pressing key H activates the function Data HOLD. The display shows the message H and the screen of the measurement in progress is frozen. This operating mode is deactivated when key H is pressed again or the switch is operated Backlight Long pressing key H activates or deactivates the display backlight. This function automatically deactivates after approximately 10 seconds after being activated, in order not to discharge the batteries. EN - 15
18 AC+DC voltage and Voltage Harmonics measurement Fig. 6: AC+DC voltage measurement Insert the red cable into the input lead VΩ and the black cable into the input lead COM, and position the leads to the desired points of the circuit being tested (Fig. 6). The voltage and frequency value is shown on the display Key F2 Par Press key F2 (Par) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F2, the cursor will scroll through the available items, as follows: Voltage: it shows the measured Voltage value; Voltage Har: it shows the measured Voltage harmonics; Esc: it closes the drop-down menu. Select the desired parameter and press key F4 (OK) to confirm AC+DC voltage The screen shows an example of AC+DC Voltage measurement. Mod Par OK Voltage AC 50.0 Hz Voltage Har Esc V Mod Par Fnz AC 50.0 Hz V EN - 16
19 Key F4 Fnz in AC+DC voltage measurement While measuring AC+DC voltage, press key F4 (Fnz) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F4, the cursor will scroll through the available items, as follows: Max: it constantly displays the maximum RMS value of Voltage; Min: it constantly displays the minimum RMS value of Voltage; Cr+: it constantly displays the maximum positive crest value; Cr-: it constantly displays the minimum negative crest value; Rst: it deletes all stored Max, Min, Cr+ and Cr- values; Esc: it goes back to a normal measuring mode. By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function. Mod Par OK Fnz AC 50.0 Max Hz Min Cr Cr- V Rst Esc Mod Par Fnz Max AC 50.0 Hz V Voltage harmonics The screen shows an example of Voltage Harmonics measurement. By pressing keys F1 ( ) or F3 ( ), it is possible to move the cursor over the graph and to select the harmonic to be measured. It is possible to measure up to the 25 th harmonic, for fundamental frequencies between 10Hz and 75Hz, and up to the 8 th harmonic for fundamental frequencies between 75Hz and 400Hz Key F4 Fnz in Voltage Harmonics measurement While measuring Voltage Harmonics, press key F4 (Fnz) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F4, the cursor will scroll through the available items, as follows: Max: it constantly displays the maximum RMS value of the selected current harmonic; Min: it constantly displays the minimum RMS value of the selected current harmonic; Abs: it displays the absolute value of the harmonics in Volts; Par Fnz H V ThdV 10.0 % Par OK Fnz Max Min Abs % H Rst V Esc ThdV 10.0 % EN - 17
20 %: it displays the value of the harmonics as percentage value with respect to the fundamental; Rst: it deletes all stored Max, Min values; Esc: it goes back to a normal measuring mode. Note: since the menu contains functions with a different meaning (Max-Min and Abs-%), it is necessary to enter the menu twice: once for displaying Abs or % values and another time to enable the Max or Min functions. Par Fnz By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function. H V ThdV 10.0 % Max Hold Short pressing key H activates the function Data HOLD. The display shows the message H and the screen of the measurement in progress is frozen. This operating mode is deactivated when key H is pressed again or the switch is operated Backlight Long pressing key H activates or deactivates the display backlight. This function automatically deactivates after approximately 10 seconds after being activated, in order not to discharge the batteries. EN - 18
21 Checking phase sequence and phase concordance with a lead WARNING While measuring, the instrument must be held in the operator s hand. Press key F1 (Mod) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F1 (Mod), the cursor will scroll through the available items. Select Ph Seq and press key F4 (OK) to confirm the selected item. Mod Par AC AC DC Ph Seq Help Esc HT9022 Ok <10.0 Hz ---- V Verification of Phase Sequence. Fig. 7: verification of phase sequence 1. The instrument shows the screen here to the side, and waits for the detection of phase L1. 2. Insert the red cable into input terminal VΩ and connect the red lead to phase L1 (Fig. 7). Mod Ph Seq PH1 Wait Go EN - 19
22 WARNING If the frequency of the measured voltage is lower than 40Hz or higher than 70Hz, the display shows the message F<40 Hz or F>70 Hz and phase detection does not start. 3. When a voltage higher than or equal to 100V is detected, the instrument gives an acoustic signal (buzzer) and the message Meas is shown on the display. Do not press any key and keep the test lead connected to L1 phase cable. Mod Ph Seq PH1 Meas Mod Ph Seq Go Go 4. Once phase L1 acquisition is complete, the displays shows the screen here to the side. Disconnect the test lead from phase L1 cable. Discon. Wait Mod Ph Seq Go 5. The instrument shows the screen here to the side, and waits for the detection of phase L2. Connect the test lead to phase L2 cable. PH2 Wait WARNING If more than 3 seconds elapse before detecting phase L2, the instrument displays the message Time Out. It is necessary to repeat the measuring cycle from the beginning, by pressing key F4 (Go) and starting from step 1 again. Mod Ph Seq Go 6. When a voltage higher than or equal to 100V is detected, the instrument gives an acoustic signal (buzzer) and the message Meas is shown on the display. Do not press any key and keep the test lead connected to L2 phase cable. PH2 Meas EN - 20
23 7. If the two phases, to which the test lead has been connected, are in the correct sequence, the instrument displays the screen here to the side. Should the phase sequence be incorrect, the display shows 132. To start a new measurement, press key F4 (Go) Verification of Phase Concordance Mod Ph Seq 123 Go Fig. 8: verification of Phase Concordance 1. The instrument shows the screen here to the side, and waits for the detection of phase L1. 2. Insert the red cable into input terminal VΩ and connect the red lead to phase L1 of the first sequence (Fig. 8). Mod Ph Seq PH1 Wait Go EN - 21
24 3. When a voltage higher than or equal to 100V is detected, the instrument gives an acoustic signal (buzzer) and the message Meas is shown on the display. Do not press any key and keep the test lead connected to L1 phase cable. Mod Ph Seq PH1 Meas Mod Ph Seq HT9022 Go Go 4. Once phase L1 acquisition is complete, the displays shows the screen here to the side. Disconnect the test lead from phase L1 cable. Discon. Wait Mod Ph Seq Go 5. The instrument shows the screen here to the side, and waits for the detection of the second sequence of phase L1. Connect the test lead to phase L1 of the second sequence. PH2 Wait WARNING If more than 3 seconds elapse before detecting the phase L1 of the second sequence, the instrument displays the message Time Out. It is necessary to repeat the measuring cycle from the beginning, by pressing key F4 (Go) and starting from step 1 again. 6. When a voltage higher than or equal to 100V is detected, the instrument gives an acoustic signal (buzzer) and the message Meas is shown on the display. Do not press any key and keep the test lead connected to L1 phase cable of the second sequence. 7. If there is concordance between the two phases, to which the test lead has been connected, the instrument displays the screen here to the side. Otherwise, it displays 123 or 132. To start a new measurement, press key F4 (Go). Mod Ph Seq PH2 Meas Mod Ph Seq 11- Go Go EN - 22
25 5.4. POSITION A : DC, AC+DC CURRENT MEASUREMENT HT9022 WARNING The maximum measurable DC or AC+DC current is 1000A. When the display shows > 999.9A, it means that the maximum value the clamp is able to measure has been exceeded. Exceeding these limits could result in electrical shocks to the user and damage to the instrument. We recommend holding the clamp respecting the safety area created by the hand protection (see Fig. 3) Mod Par Fnz AC <10.0 Hz By positioning the selector switch to A will appear., the screen to the side ---- A Press key F1 (Mod) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F1, the cursor will scroll through the available items, as follows: AC: AC+DC voltage measurement; DC: DC voltage measurement; Help: it displays the connection between instrument and system; Esc: it closes the drop-down menu. Select the desired mode and press key F4 (OK) to confirm DC current measurement Mod Par AC AC DC Help Esc OK <10.0 Hz ---- A Fig. 9: DC current measurement WARNING Insert the cable in the middle of the clamp jaws, in order to obtain accurate measures. Use the marks as a reference (see Fig. 2). EN - 23
26 Mod Par Fnz DC The screen shows an example of DC current measurement A Key F4 Fnz Press key F4 (Fnz) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F4, the cursor will scroll through the available items, as follows: Max: it constantly displays the maximum value of DC current; Min: it constantly displays the minimum selected value of DC current; Cr+: it constantly displays the maximum positive crest value; Cr-: it constantly displays the minimum negative crest value; Zero: it zeroes the measured DC current; Rst: it deletes all stored Max, Min, Cr+ and Cr- values; Esc: it goes back to a normal measuring mode. Mod Par OK Fnz DC Max Min Cr Cr- A Zero Rst Esc WARNING Note: carry out current zeroing before clamping the conductor; the measurement of the 4 Max, Min, Cr+ and Cr- values is simultaneous, regardless of the one displayed. Mod Par Fnz Max DC By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function A Hold Short pressing key H activates the function Data HOLD. The display shows the message H and the screen of the measurement in progress is frozen. This operating mode is deactivated when key H is pressed again or the switch is operated Backlight Long pressing key H activates or deactivates the display backlight. This function automatically deactivates after approximately 10 seconds after being activated, in order not to discharge the batteries. EN - 24
27 AC+DC current and Current Harmonics measurement Key F2 Par Fig. 10: AC+DC current measurement WARNING Insert the cable in the middle of the clamp jaws, in order to obtain accurate measures. Use the marks as a reference (see Fig. 2). Press key F2 (Par) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F2, the cursor will scroll through the available items, as follows: Current: it shows the measured current value; Current Har: it shows the measured Current harmonics; Esc: it closes the drop-down menu. Select the desired parameter and press key F4 (OK) to confirm AC+DC current Mod Par OK Current AC 50.0 Hz Current Har Esc A Mod Par Fnz AC 50.0 Hz The screen shows an example of AC+DC current measurement A EN - 25
28 Key F4 Fnz in AC+DC current measurement While measuring Current, press key F4 (Fnz) to open the dropdown menu shown on the screen to the side. At each subsequent pressure of key F4, the cursor will scroll through the available items, as follows: Max: it constantly displays the maximum RMS value of current; Min: it constantly displays the minimum RMS value of current; Cr+: it constantly displays the maximum positive crest value; Cr-: it constantly displays the minimum negative crest value; Zero: it zeroes the average value of the measured current; Rst: it deletes all stored Max, Min, Cr+ and Cr- values; Esc: it goes back to a normal measuring mode. Mod Par OK Fnz AC 50.0 Max Hz Min Cr Cr- A Zero Rst Esc WARNING Note: carry out current zeroing before clamping the conductor. Mod Par Fnz Max AC 50.0 Hz By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function A Current harmonics The screen shows an example of Current Harmonics measurement. By pressing keys F1 ( ) or F3 ( ), it is possible to move the cursor over the graph and to select the harmonic to be measured. It is possible to measure up to the 25 th harmonic, for fundamental frequencies between 10Hz and 75Hz, and up to the 8 th harmonic for fundamental frequencies between 75Hz and 400Hz Key F4 Fnz in Current Harmonics measurement While measuring Current Harmonics, press key F4 (Fnz) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F4, the cursor will scroll through the available items, as follows: Max: it constantly displays the maximum RMS value of the selected current harmonic; Min: it constantly displays the minimum RMS value of the selected current harmonic; Abs: it displays the value of the harmonics in Amperes; Par Fnz H A ThdI 10.0 % Par OK Fnz Max Min Abs % H Rst A Esc ThdI 10.0 % EN - 26
29 %: it displays the value of the harmonics as percentage value with respect to the fundamental; Rst: it deletes all stored Max and Min values; Esc: it goes back to a normal measuring mode. Note: since the menu contains functions with a different meaning (Max-Min and Abs-%), it is necessary to enter the menu twice: once for displaying Abs or % values and another time to enable the Max or Min functions. Par Fnz By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function. H A ThdI 10.0 % Max Hold Short pressing key H activates the function Data HOLD. The display shows the message H and the screen of the measurement in progress is frozen. This operating mode is deactivated when key H is pressed again or the switch is operated Backlight Long pressing key H activates or deactivates the display backlight. This function automatically deactivates after approximately 10 seconds after being activated, in order not to discharge the batteries. EN - 27
30 5.5. POSITION W : DC, AC+DC POWER MEASUREMENT WARNING The maximum DC or AC+DC input voltage is 1000V and the maximum measurable DC or AC+DC current is 1000A. Do not measure voltages and currents exceeding the limits given in this manual. Exceeding these limits could result in electrical shocks to the user and damage to the instrument. We recommend holding the clamp respecting the safety area created by the hand protection (see Fig. 3) Mod Par Sys Fnz AC <10.0 Hz By positioning the selector switch to W side will appear., the screen to the ---- kw ---- kvari ---- kva 1P Press key F1 (Mod) to open the drop-down menu shown on the Mod Par Sys OK screen to the side. At each subsequent pressure of key F1, the AC 1P AC <10.0 Hz cursor will scroll through the available items, as follows: AC 3P AC 1P: measurement of AC Powers on single-phase system; DC ---- kw AC 3P: measurement of AC Powers on three-phase Help ---- kvari Esc balanced system; ---- kva DC: DC Power measurement; Help: it displays the connection between instrument and system; Esc: it closes the drop-down menu. Select the desired measuring mode and press key F4 (OK) to confirm. See par.9.1, 9.2 and 9.3 for details about calculation formulas. EN - 28
31 DC power measurement Fig. 11: DC power measurement Insert the red cable into input lead VΩ and the black cable into input lead COM. Position the red lead to + and the black lead to - and insert the + cable into the clamp jaws, respecting the direction of current indicated by the arrow (see Fig. 4) ATTENZIONE Insert the cable in the middle of the clamp jaws, in order to obtain accurate measures. Use the marks as a reference (see Fig. 2) Key F2 Par Press key F2 (Par) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F2, the cursor will scroll through the available items, as follows: Power: it shows the measured Power value; Volt-Curr: it displays the measured Voltage and Current values; Energy: it shows the measured energy value. This measurement is only active when a recording is active (see par ). Esc: it closes the drop-down menu. Select the desired parameter and press key F4 (OK) to confirm. Mod Par Sys Power DC Volt-Curr Energy Esc OK 0.40 kw EN - 29
32 DC power The screen to the side shows an example of DC power measurement. Mod Par Sys Fnz DC 0.40 kw Key F4 Fnz in DC Power measurement While measuring DC Power, press key F4 (Fnz) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F4, the cursor will scroll through the available items, as follows: Max: it constantly displays the maximum value of the measured parameter; Min: it constantly displays the minimum value of the measured parameter; Rst: it deletes all stored Max and Min values; Esc: it goes back to a normal measuring mode. By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function. Mod Par OK Fnz DC Max Min Rst Esc 0.40 kw Mod Par Sys Fnz Max DC 0.40 kw DC voltage and current The screen shows an example of DC Voltage and Current measurement. Mod Par Sys Fnz DC 80.0 V 20.0 A EN - 30
33 Key F4 Fnz in DC Voltage and Current measurement While measuring Voltage and Current, press key F4 (Fnz) to open the drop-down menu shown on the screen to the side. At DC each subsequent pressure of key F4, the cursor will scroll through the available items, as follows: Max: it constantly displays the maximum value of the measured parameter; Min: it constantly displays the minimum value of the measured parameter; Cr+: it constantly displays the maximum positive crest value measured; Cr-: it constantly displays the minimum negative crest value measured; Zero: it zeroes the measured DC current; Rst: it deletes all stored Max, Min, Cr+ and Cr- values; Esc: it goes back to a normal measuring mode. WARNING Note: carry out current zeroing before clamping the conductor. Mod Par OK Fnz Max Min Cr V Cr Zero A Mod Par Sys Fnz Max DC Rst Esc By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function V 20.0 A DC Energy The screen shows an example of DC Energy measurement. Mod Par Sys Fnz DC 2.20 kwh Log Hold Short pressing key H activates the function Data HOLD. The display shows the message H and the screen of the measurement in progress is frozen. This operating mode is deactivated when key H is pressed again or the switch is operated Backlight Long pressing key H activates or deactivates the display backlight. This function automatically deactivates after approximately 10 seconds after being activated, in order not to discharge the batteries. EN - 31
34 Measurement of AC 1P or AC 3P Powers Fig. 12: measurement of AC 1P or AC 3P Powers Insert the red cable into the input lead VΩ and the black cable into the input lead COM, and connect the instrument as described in Fig Key F2 Par WARNING Insert the cable in the middle of the clamp jaws, in order to obtain accurate measures. Use the marks as a reference (see Fig. 2). Press key F2 (Par) to open the drop-down menu shown on the Mod Par Sys OK screen to the side. At each subsequent pressure of key F2, the P-Q-S AC <10.0 Hz cursor will scroll through the available items, as follows: Pf-dPf P-Q-S: it displays the measured values of Active, Reactive ---- Volt-Curr kw and Apparent Power; Voltage Har ---- Pf-dPf: it displays the measured values of Power Factor and Current Har kvari Cosphi; ---- Energy kva Esc Voltage Harm: it shows the measured Voltage Harmonics; Current Harm: it shows the measured Current Harmonics; Energy: it shows the measured energy value. This measurement is only active when a recording is active (see par ). Esc: it closes the drop-down menu. Select the desired parameter and press key F4 (OK) to confirm. EN - 32
35 AC+DC power The screen shows an example of AC+DC Power measurement. Mod Par Sys Fnz AC 50.0 Hz kw 7.68 kvari kva 1P Pf and dpf The screen shows an example of Power Factor and Cosphi measurement. Mod Par Sys Fnz AC 50.0 Hz Pf dpf 0.94 i 0.94 i 1P Key F4 Fnz in Power or Pf-dPf measurement While measuring Power or Pf-dPf, press key F4 (Fnz) to open the drop-down menu shown on the screen to the side. At each subsequent pressure of key F4, the cursor will scroll through the available items, as follows: Max: it constantly displays the maximum value of the measured parameter; Min: it constantly displays the minimum value of the measured parameter; Rst: it deletes all stored Max and Min values; Esc: it goes back to a normal measuring mode. By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function. Mod Par OK Fnz AC 50.0 Max Hz Min Rst kw 7.68 kvari Esc kva Mod Par Sys Fnz Max AC 50.0 Hz kw 7.68 kvari kva 1P EN - 33
36 AC+DC Voltage and Current The screen shows an example of AC+DC Voltage and Current measurement. Mod Par Sys Fnz AC 50.0 Hz Key F4 Fnz in AC Voltage and Current measurement V 1P 99.6 A While measuring Voltage and Current, press key F4 (Fnz) to Mod Par OK Fnz open the drop-down menu shown on the screen to the side. At AC 50.0 Max Hz each subsequent pressure of key F4, the cursor will scroll Min through the available items, as follows: Cr+ V Max: it constantly displays the maximum value of the Crmeasured parameter; Zero 99.6 Rst A Min: it constantly displays the minimum value of the Esc measured parameter; Cr+: it constantly displays the maximum positive crest value measured; Cr-: it constantly displays the minimum negative crest value measured; Zero: it zeroes the average value of the measured current; Rst: it deletes all stored Max, Min, Cr+ and Cr- values; Esc: it goes back to a normal measuring mode. WARNING Note: carry out current zeroing before clamping the conductor. Mod Par Sys Fnz Max AC 50.0 Hz By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function V 99.6 A 1P EN - 34
37 Voltage harmonics The screen shows an example of Voltage Harmonics measurement. By pressing keys F1 ( ) or F3 ( ), it is possible to move the cursor over the graph and to select the harmonic to be measured. It is possible to measure up to the 25 th harmonic, for fundamental frequencies between 10Hz and 75Hz, and up to the 8 th harmonic for fundamental frequencies between 75Hz and 400Hz Current harmonics The screen shows an example of Current Harmonics measurement. By pressing keys F1 ( ) or F3 ( ), it is possible to move the cursor over the graph and to select the harmonic to be measured. It is possible to measure up to the 25 th harmonic, for fundamental frequencies between 10Hz and 75Hz, and up to the 8 th harmonic for fundamental frequencies between 75Hz and 400Hz. Par Fnz H V ThdV 2.4 % Par Fnz H A ThdI 10.7 % Key F4 Fnz in Voltage and Current Harmonics measurement While measuring Voltage or Current Harmonics, press key F4 Par OK Fnz (Fnz) to open the drop-down menu shown on the screen to the Max side. At each subsequent pressure of key F4, the cursor will Min scroll through the available items, as follows: Abs Max: it constantly displays the maximum RMS value of the % selected current or voltage harmonic; H Rst A Esc Min: it constantly displays the minimum RMS value of the ThdI 10.0 % selected current or voltage harmonic; Abs: it displays the value of the harmonics in Amperes or Volts; %: it displays the value of the harmonics as percentage value with respect to the fundamental; Rst: it deletes all stored Max and Min values; Esc: it goes back to a normal measuring mode. Note: since the menu contains functions with a different meaning (Max-Min and Abs-%), it is necessary to enter the menu twice: once for displaying Abs or % values and another time to enable the Max or Min functions. Par Fnz By pressing key F3 (OK), the selected item is confirmed. To the side, an example of measurement with active Max function. The display shows the active function. H A ThdI 10.0 % Max EN - 35
38 AC Energy The screen shows an example of AC Energy measurement. The values of Active Energy, Reactive Energy, Inductive Energy and Capacitive Reactive Energy are shown. Mod Par Sys Fnz AC 50.0 Hz 2.24 kwh 0.84 kvarih 0.00 kvarch Log 1P Hold Short pressing key H activates the function Data HOLD. The display shows the message H and the screen of the measurement in progress is frozen. This operating mode is deactivated when key H is pressed again or the switch is operated Backlight Long pressing key H activates or deactivates the display backlight. This function automatically deactivates after approximately 10 seconds after being activated, in order not to discharge the batteries. EN - 36
39 5.6. POSITION W : LOG, ON-LINE SCOPE, SNAPSHOT, MEMORY, DOWNLOAD WARNING The maximum DC or AC+DC input voltage is 1000V and the maximum measurable DC or AC+DC current is 1000A. Do not measure voltages and currents exceeding the limits given in this manual. Exceeding these limits could result in electrical shocks to the user and damage to the instrument. We recommend holding the clamp respecting the safety area created by the hand protection (see Fig. 3). Turn the rotary switch to W. Insert the red cable into the input lead VΩ and the black cable into the input lead COM, and connect the instrument as described in Fig. 12 WARNING Insert the cable in the middle of the clamp jaws, in order to obtain accurate measures. Use the marks as a reference (see Fig. 2) Key F3 Sys While measuring DC, AC 1P or AC 3P Power, press key F3 Mod Par Sys OK (Sys) to open the drop-down menu shown on the screen to the AC Start 50.0 Log Hz side. At each subsequent pressure of key F3, the cursor will Online scroll through the available items, as follows: Memory kw Start Log: it starts a recording of the electrical mains 7.68 SnapShot kvari parameters; Download kva Esc On-line: it starts a Bluetooth On-Line Scope; Memory: it shows the list of the saved data; SnapShot: it carries out an instant saving of the measured parameters; Download: it sets to the mode for downloading the data saved in the memory; Esc: it closes the drop-down menu. By pressing key F4 (OK), the selected item is confirmed. The electrical parameters recorded during a Recording, transmitted during an On-Line Scope or saved in a SnapShot, according to the mode set, are the following: AC 1P:AC 1P: P, Q, S, pf, dpf, V, I, THDV, THDI, hv01..hvxx (xx=25 for fundamental frequency Hz; xx=8 for fundamental frequency Hz); AC 3P: P, Q, S, pf, dpf, V, I, THDV, THDI, hv01..hvxx (xx=25 for fundamental frequency Hz; xx=8 for fundamental frequency Hz); DC: P, V, I Start Log recording Upon confirming the Start Log item, the instrument sets to stand-by and waits for a recording to start. A recording shall be started when reaching the following minute as indicated by the instrument s time. The message Wait is displayed. Mod Par Sys Fnz AC 50.0 Hz kw 7.68 kvari kva Wait 1P 19/01-17:00:35 EN - 37
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