User's Manual Datalogging AC/DC Power Clamp-on Meter Model 382068 Table of Contents Specifications General Specifications …………………………………………………………. 3 Range Specifications……………………………………………………………. 3 Safety Information ……………………………………………….………………. 5 Meter and Display Descriptions………………………………..……….……… 6 Measurements AC/DC Power Measurements………………………………………………….. 7 AC/DC Voltage Measurements………………………………………………… 16 AC/DC Current Measurements………………………………………….……… 17 Resistance and Continuity Measurements…………………………….……… 18 Diode Tests …………………….…………….……………………………..…… 19 Min/Max Mode ………………………………….……………………………..…… 19 Peak Detector ………………………………….……………………………..…… 19 Data Hold .………………………………….…………………………………..…… 19 Datalogging …………………………………….……………………………...…... 20 Maintenance Battery Replacement..………………………………….…………………..…… 21 Cleaning ………………………………….……………………………..……….. 21 Repair and Calibration Services ………………………………………….……. 21 Tech Support Hotlines..………………………………….………………………. 21 Introduction Congratulations on your purchase of the Extech 382065/382068 Datalogging AC/DC Power Clampon Meter. Measurements include DC and AC True Power, Apparent Power, Power Factor, and True RMS Voltage, Current, & Watts. Status indication for Lead/Lag and PF is included as well as dual displays of KW + PF, KVA + PF, V + A, A + Hz, and V + Hz. The frequency of Voltage and Current measurements can be displayed also. Datalogger and PC interface features are built into the meter. The Datalogger/Data Acquisition Software package is for exclusive use with the Model 382065/382068 Clamp on Power Datalogger. Windows® XP, Vista, Window’s 7-32 bit, and 7-64 bit operating systems are supported. Users can download readings stored in the datalogger to a PC, program sample rates for datalogging, remotely monitor readings, and save readings to ASCII files for export to spreadsheet and other programs. Careful use will provide years of reliable service. 2 382068-EU-EN-V4.0 12/11 Specifications General Specifications Main display 4-digit (10,000 count) multi-function LCD Bargraph display 40-segment bargraph Datalogger 4000 data point continuous logging (25 point manual logging) Peak hold Built-in detector captures positive and negative peaks to .1ms Maximum voltage 600Vrms between any terminal and earth ground with MIN / MAX and Peak detect recording Meter power 9V battery Battery life 30 hours (approx.) Low battery indication Battery icon is displayed Auto power off After 30 minutes (approx.) Display update rate 2 times per second (Bargraph); 5 times per second (Digits), (once every 6 seconds for the KW function) Jaw opening For Cables φ 1.8” (46mm) Operating temperature 32 to 122 F (0 to 50 C) o o Operating Humidity R.H. < 80% non-condensing. Storage temperature 14 to 140 F (-10 to 60 C) o o o Storage Humidity RH < 70% non-condensing Dimensions/Weight 10.24 x 3.66 x 1.77" (260 x 93 x 45mm) / 1 lb. (450g) Accessories Range Specifications Carrying case, test leads, and 9V battery o o o o Accuracy specs are ± (reading + no. of digits) at 64 to 82 F (18 to 28 C) and RH to 80% True power & Apparent power measurements (600KW Max.) Frequency Input Resolution Accuracy range Overload protection V<130V, A<150A V>130V, A<150A 0.01 ±(2%+5) 0.1 ±(2%+1) 45Hz to 500Hz 600V/1100A Range* Resolution Accuracy Frequency Range 0.30 to 1.00 ± (4% + 10d) 0.001 10Hz to 5KHz 0.00 to 0.30 Not specified *Minimum voltage: 100V AC, Minimum Current: 20A AC Sensitivity >100V / 10A V<130V, A>150A V>130V, A>150A Power Factor DCA Range 2 to 1000A Resolution Accuracy Overload protection 0.1A ±(1.5% + 5) 1100A 3 382068-EU-EN-V4.0 12/11 ACA Range Resolution Accuracy Frequency range Overload protection 2 to 1000A 0.1A ±(1.5% + 5) 45Hz to 500Hz 1100A Crest factor < 3 for stated accuracy DCV Range Resolution Accuracy 2 to 600V 0.1V ±(0.5% + 5) Input impedance Overload protection 1MΩ 600V ACV Range Resolution Input Frequency impedance range 45Hz to 500Hz 1MΩ Accuracy 2 to 600V 0.1V ± (0.5%+5) Crest factor < 3 for stated accuracy Overload protection 600Vrms Peak indication Range Resolution 20A~80A 0.1A 80A~1000A 0.1A Peak detect acquisition time .1ms Accuracy ±(10% + 10) ±(6% + 10) Overload protection 1100A 1100A Peak indication Range Resolution 20V~80V 0.1V 80V~600V 0.1V Peak detect acquisition time .1ms Accuracy ±(10% + 10) ±(6% + 10) Overload protection 600Vrms 600Vrms Audible continuity Continuity Range beeper Open circuit voltage Overload protection 3.2V 600Vrms < 50 Ω Resistance ( Ω ) Range Resolution Accuracy 10KΩ 1Ω ±(1% + 5) Open circuit voltage 3.2 V Overload protection 600Vrms Diode test Range Resolution Overload protection 0.001V 600Vrms Frequency (Hz) Range Resolution 1KHz 0.1Hz 5KHz 10 Hz Voltage sensitivity Accuracy ±(0.5% + 5) 10V or 10A 4 Overload protection 600V / 1100A 382068-EU-EN-V4.0 12/11 Safety Information 1. Read the following safety information carefully before attempting to operate or service the meter. 2. Read all operating instructions before use. 3. To avoid damage to the instrument do not exceed the published input limits. 4. Do not use the meter or test leads if they appear damaged. Use extreme caution when working around bare conductors or bus bars. Accidental contact with a conductor could result in electric shock. 5. Use the meter only as specified in this manual otherwise the protection provided by the meter may be impaired. 6. Use caution when working with voltages above 60VDC or 30VAC RMS. Such voltages pose a shock hazard. 7. Before taking resistance or continuity measurements, disconnect the circuit from the main power supply and disconnect all loads from the circuit. 8. Safety Specifications: • Installation categories III • Pollution degree 2 • Altitude: 2000m max • Indoor use only Safety symbols Caution: Refer to this manual before using the meter. Dangerous voltages. Meter is protected throughout by double insulation or reinforced insulation. When servicing, use only specified replacement parts. Complies with EN-61010-1, IEC 1010-2-32 5 382068-EU-EN-V4.0 12/11 Meter Description 1. Transformer jaws 9. 2. Jaw trigger 10. PC Interface Jack 3. Data Hold button 11. COM terminal 4. Function selector 12. VΩHz terminal 5. Peak Detector READ button 13. Low battery indication 6. MIN/MAX/PEAK function button 14. Analog Display 7. DC A/W ZERO button 15. Bargraph Display 8. RECORD button 16. Units Symbols LCD display Figure 1 HOLD Hz V OFF 1000A KW 3 3W 3 4W WL123MEMREADP P- HOLDMAX- MIN 3 3W3 4W Hz KVA PF lead lag RECORD KW KVA K 600V Figure MAX CAT WL123MEMREADP PP-HOLD HOLDMAX- MIN 3 3W3 4W Hz KVA PF lead lag RECORD 2 KW KVA K 6 382068-EU-EN-V4.0 12/11 AC/DC Power Measurements AC/DC 1φ2W Power (W) and Power Factor (PF) Measurements HOLD Hz V OFF 1000A KW 3 3W 3 4W PF lag KW PF lag KW 600V MAX CAT 600V MAX CAT Figure 3 WARNING Do not clamp on to a conductor when zeroing the jaw's residual magnetic field until the LCD reads zero. 1. With the clamp jaws empty, turn the clamp meter on by setting the rotary switch to the KW position (refer to figure 3). 2. Insert the test leads into the input terminals (black lead to COM and red lead to '+'). 3. Connect the probe end of the black test lead to the neutral line. 4. Connect the probe end of the red lead to the power line. 5. Clamp the meter onto the conductor where the red test lead is connected. 6. The power clamp will automatically select the appropriate range. 7. Read the Watt (middle of display) and PF (top display) values on the LCD. 8. Press the READ button to scroll through the dual displays of KW + PF, A + V, and KVA + PF. 7 382068-EU-EN-V4.0 12/11 Note: When calculating KVAR, the KVAR accuracy greatly depends on V, A and KW measurement accuracy (especially when PF is very close to 1). To get a more accurate value when PF is greater than 0.91 (φ < 25°), use the following equation for a pure sine wave PF = KW KVA KVA (Apparent Power): KVA = V *A 1000 KVAR (Reactive Power): KVAR= (KVA)2 − (KW) 2 Note: The "+" sign printed on the jaw must face the power source. 3φ3W AC/DC Power Measurement HOLD Hz V OFF 1000A KW 3 3W 3 4W WL12 3 3W PF lag KW WL12 3 3W WL12 PF lag 3 3W KW 600V 600V MAX CAT MAX CAT Figure 4 8 382068-EU-EN-V4.0 12/11 A. With the Clamp jaws empty, turn the meter on by setting the rotary switch to the 3φ3W position. WL12 will appear on the upper left side of the LCD prompting the user to take a WRS (L2 L1) measurement. 1. Insert the test leads into the input terminals (black to COM terminal and red to '+'). 2. Select one phase (eg. S or L2) as COM and connect the probe end of the black lead to that phase (eg. S or L2). 3. Connect the probe end of the red test lead to the second phase (eg. R or L1). 4. Clamp the meter onto the same phase as the red test lead (eg. R or L1). 5. The meter will automatically select the proper range. 6. Wait until the reading is stable (about 6 seconds), and then press the READ button. WL23 will appear prompting the user to take a measurement of WTS (WL3 L2). B. Measure WTS (L3 L2) (refer to figure 5). 1. Disconnect the red test lead from the phase where the clamp is connected. 2. Connect the red test lead to the third phase (eg. T or L3). 3. Clamp onto the third phase (where the red test lead is connected; eg. T or L3). 4. The meter will automatically select the proper range. 5. Wait until the reading is stable (about 6 seconds) and then press the READ button. C. The power clamp will process these measurements and display the result. WL123 appears in the upper left corner of the LCD and the 3φ3W power measurement is displayed in watts (this value is now stored in meter memory). The following equations are provided for your information. W3φ3W = WRS(L1L2) + WTS(L3L2) KVA3φ 3W = K W 2 3φ 3W + KVAR 2 3φ 3W PF 3φ 3W = KW 3φ 3W KVA3φ 3W Notes: 1. Once a phase is designated as common (COM) it should remain as such in all subsequent measurements. For example, if the S (or L2) phase is selected, S (or L2) phase is connected to COM during the measurements of WRS (or WL1L2) and WTS (or WL3L2) in 3φ 3W unbalanced power. 2. The "+" sign printed on the jaw must face the power source. 3. In 3φ3W unbalanced power measurements, if either WRS or WTS is negative (connection error) ensure that all test lead and clamp connections are correct. 9 382068-EU-EN-V4.0 12/11 HOLD Hz V OFF 1000A KW 3 3W WL 23 3 4W 3 3W WL 23 PF lag 3 3W KW WL 23 3 3W PF lag KW 600V MAX CAT 600V MAX CAT Figure 5 WL123 HOLD 3 3W PF lag KW 600V MAX CAT Figure 6 10 382068-EU-EN-V4.0 12/11 3φ4W AC/DC Power Measurement HOLD Hz V OFF 1000A KW 3 3W 3 4W WL1 3 4W WL1 3 4W WL1 PF PF lag KW lag 3 4W KW 600V 600V MAX CAT MAX CAT Figure 7 HOLD Hz V OFF 1000A KW 3 3W 3 4W WL 2 3 4W WL 2 PF lag 3 4W KW WL 2 3 4W PF lag KW 600V 600V MAX CAT MAX CAT Figure 8 11 382068-EU-EN-V4.0 12/11 HOLD Hz V OFF 1000A KW 3 3W WL 3 3 4W WL 3 PF 3 4W lag 3 4W KW WL 3 3 4W PF lag KW 600V MAX CAT 600V MAX CAT Figure 9 WL123 HOLD 3 4W PF lag KW 600V MAX CAT Figure 10 12 382068-EU-EN-V4.0 12/11 A. Measure WR (L1) / PFR (L1) (refer to figure 6). 1. With the jaw enclosure empty, turn the meter on by setting the rotary switch to the 3φ4W position. 2. Insert the test leads into the input terminals (black lead to the COM terminal and red to '+'). 3. Connect the black lead's probe end to the neutral line. 4. Connect the red lead's probe end to the first phase (eg. R or L1). 5. Clamp on to the same phase as the red test lead (eg. R or L1). 6. The meter will automatically select the proper range. 7. Wait until the reading is stable (about 6 seconds) then press the READ button. WL1 will disappear and WL2 will appear prompting the user to take a WS (L2) / PFS (L2) measurement. B. Measure WS (L2)/PFS (L2) (refer to figure 7) 1. Disconnect the red test lead from the phase where the jaws are clamped. 2. Connect the red test lead to the second phase (eg. S or L2). 3. Clamp onto the phase where the red test lead is connected (eg. S or L2 phase) 4. The meter will automatically select the proper range. 5. Wait until the reading is stable (about 6 seconds) then press the READ button. WL2 will disappear and WL3 will appear prompting the user to take a WT (L3) / PFT (L3) measurement. C. Measure WT (L3)/PFT (L3) (refer to figure 8) 1. Disconnect the red test lead from the phase where the meter's jaws are clamped. 2. Connect the red test lead to the third phase (eg. T or L3 phase). 3. Clamp onto the phase where the red test lead is now connected (eg. T or L3). 4. The meter will automatically select the proper range. 5. Wait until the reading is stable (about 6 seconds) and then press the READ button. WL3 will disappear from the upper left hand area of the LCD. 6. The meter will process these three sets of data (refer to figure 9) and display the 3φ4W power measurement (WL123 will be displayed). The 3φ4W measurement will then be stored in memory. The following equations are provided for your information. W3φ4W = WR(L1) + WS(L2) WT(L3) KVA3φ 4W = K W 2 3φ 4W + KVAR 2 3φ 4W PF 3φ 4W = KW 3φ 4W KVA3φ 4W Notes: 1. The "+" sign printed on jaw must face the power source. 2. For 3φ4W power measurements, WR or WS and WT must be positive. If any are negative, check the test lead and clamp connections for polarity errors. 13 382068-EU-EN-V4.0 12/11 1φ3W Power Measurement HOLD Hz V OFF 1000A KW 3 3W 3 4W WL12 3 3W PF lag KW WL12 3 3W WL12 PF lag 3 3W KW 600V 600V MAX CAT MAX CAT Figure 11 HOLD Hz V OFF 1000A KW WL 23 3 3W WL 23 PF 3 3W lag 3 4W 3 3W KW WL 23 3 3W PF lag KW 600V MAX CAT 600V MAX CAT Figure 12 14 382068-EU-EN-V4.0 12/11 1φ3W power measurements are similar to 3φ3W unbalanced power measurement except for the nomenclature. Two measurements are required: (L1G) and WTS (L2G). WRS WL123 A. Measure WRS (L1G) (refer to figure 11). HOLD 3 3W PF lag 1. With the Clamp jaws empty, turn the meter on by setting the rotary switch to the 3φ3W position. KW 2. Insert the test leads into the input terminals. 3. Connect the probe end of the black lead to ground. 4. Connect the probe end of the red lead to the second phase (eg. L1). 600V 5. Clamp onto the second phase (eg. L1). MAX CAT 6. The meter will automatically select the proper range. 7. Wait until the reading is stable (about 6 seconds) and then press the READ button. 8. WL23 will appear prompting the user to take the WTS (L2G) measurement. Figure 13 B. Measure WTS or WL2G (refer to figure 12). 1. Disconnect the red test lead from the phase where the jaws are clamped. 2. Connect the red test lead to the L2 line. 3. Clamp onto the L2 line (where the red test lead is connected). 4. The meter will automatically select the proper range. 5. Wait until the reading is stable (about 6 seconds) and then press the READ button. C. The power clamp sums the two values, displays the result, and stores the 1φ3W power measurement in memory. Note the following equation: W1φ3W = WRST = WRS(L1G) + WTS(L2G) 15 382068-EU-EN-V4.0 12/11 Current and Voltage Measurements AC, DC, and AC+DC Voltage Measurements HOLD Hz V OFF 1000A KW 3 3W 3 4W Hz V 600V MAX CAT Figure 14 Warning: The maximum input is 600V. Do not attempt to take voltage measurements that exceed this limit; electrical shock and damage to the clamp meter can result. 1. Set the rotary switch to the 'V' position (refer to figure 14). 2. Insert the test leads into the input terminals (black lead to COM and red to '+'). 3. Connect the probe ends of the test leads in PARALLEL to the circuit to be measured. 4. The meter will automatically select the appropriate range and units (AC or DC). 5. Read the voltage and frequency values displayed on the LCD. Note: The sensitivity for frequency measurements is 10V. The frequency range is 45 – 500Hz. If the frequency is less than 45 Hz, the LCD will display "------". 16 382068-EU-EN-V4.0 12/11 AC, DC, and AC+DC Current Measurements A HOLD Hz V Hz OFF 1000A KW A 3 3W 3 4W Hz A 600V 600V 1. CAT MAX CAT Figure 15 Set the rotary switch to the '1000A' position (refer to figure 15). 2. For DC, press and hold the ZERO button until a beep is heard to zero the reading; the LCD will display “- - - -” while zeroing. 3. Press the trigger to open the jaw. 4. Fully enclose the conductor to be measured. Do not allow a gap between the two jaw halves when measuring. 5. The clamp will automatically select the appropriate range. 6. Read the current and frequency values displayed on the LCD. Note: The current sensitivity for frequency measurements is 10A. The frequency range is 45 - 500Hz. If the frequency is less than 45 Hz, the LCD will display "------" 17 382068-EU-EN-V4.0 12/11 Resistance and Continuity Measurements Warning: Before taking any in-circuit resistance measurements, remove power from the circuit under test and discharge all capacitors. 1. Set the function switch to the Ω position for both resistance and continuity measurements. 2. Connect the black test lead to the COM terminal and the red test lead to the '+' terminal. 3. Connect the test leads to the circuit being measured and read the displayed resistance value. Refer to Figure 16. 4. For Continuity measurements, an audible tone will sound when the reading is below 50Ω. HOLD Hz V OFF 1000A KW 3 3W 3 4W K 600V MAX CAT Figure 16 18 382068-EU-EN-V4.0 12/11 Diode and Continuity Measurements 1. Connect red test lead to the "+" terminal and black test lead to the "COM" terminal. 2. Set the range switch to the diode test position " ". 3. Connect the red test lead to the anode side and black test lead to the cathode side of the diode being tested. 4. Read the forward voltage value on LCD. The value for a good diode is 0.3VDC for germanium diodes and 0.7VDC for silicon diodes. 5. If the test lead connection is reversed, the digital reading should reflect an open circuit condition if the diode is good. 6. Continuity measurement: When the reading is below 50mV an audible tone will sound. MIN/MAX Recording 1. Set the Function Switch to the Voltage or Current position. 2. To record and view MIN and MAX values while taking measurements, press the MIN MAX button. 3. Now while measurements are being taken, the display only the MIN or the MAX reading. Use the MIN MAX button to toggle between MIN and MAX readings. The LCD will display MIN or MAX as selected. 4. To exit this mode, press and hold the MIN MAX button until the MIN and MAX display icons disappear from the LCD. Peak Detection Peak Detect mode is used to capture fast transients signals (to 0.1ms) such as those caused by motor startup surges or arc welding equipment switching. 1. Set the Function Switch to the Current or Voltage position. 2. Engage the Peak detector by pressing and holding the READ button until a short beep is heard. (Note that if the button is held longer, a longer beep will sound and the meter will be in the datalogging view mode; refer to the datalogging section for more info). 3. The LCD will display 'P-P+' when the Peak Detect mode is accessed correctly. Use the PEAK button to toggle between ' P+ Max' (captures positive polarity peaks) and 'P- MIN' (captures negative polarity peaks). 4. To exit the Peak mode, press and hold the PEAK button for two seconds (until the P- and P+ icons disappear). 5. Take a Voltage or Current measurement on a transient signal and the display will show the peak of the pulse. The fastest surge the meter can detect is 0.1ms. Data Hold 1. To freeze a displayed reading, press the HOLD key. 2. The HOLD icon will appear on the top of the LCD to let the user know that the meter is in the Data Hold mode. 3. To return the meter to the normal operation mode, press the HOLD key again. The HOLD icon will extinguish. 19 382068-EU-EN-V4.0 12/11 Datalogging Single mode 1. Single mode datalogging records one reading at a time. 2. To record one reading, press the RECORD key until one beep heard. (Note that if the button is held longer, 2 beeps will sound and the meter will be in continuous mode; see below). The record number (1 through 25 or FULL) will briefly appear on the LCD. 3. The meter can store up to 25 readings. When the memory is full, FULL will display. 4. To view the readings, press and hold the READ button until two tones are heard. The second tone is longer and louder than the first. 5. Now use the yellow and keys to scroll through the recorded readings. Continuous mode (for use with PC interface only) 1. In continuous mode the meter records one reading after another automatically. Up to 4000 records can be recorded. 2. Press and hold the RECORD until two tones are heard (not available in 3φ3W and 3φ4W function positions). The meter will begin recording data and the RECORD icon will appear on the LCD. 3. To exit the Record mode, press and hold the RECORD button until the RECORD display icon disappears. 4. Readings can only be transferred to a PC with optional Windows® software and interface cable. Instructions for use are provided with optional software/hardware kit. Clearing Datalog Data 1. Turn the meter off and hold down the RECORD button while turning the meter on. 2. Release the RECORD key when CLR appears. The datalog memory is now clear. Maintenance Battery Replacement Warning: To prevent electrical hazard or shock, turn off the clamp meter and disconnect the test leads before removing the back cover. When the 9V battery expires, the LCD will display the battery icon. To replace the battery: 1. Set the Range switch to the OFF position. 2. Remove the meter's three rear screws and carefully open the meter housing. 3. Replace the 9V battery and re-assemble the meter housing. Cleaning Periodically wipe the case with a dry cloth; do not use abrasives or solvents. Copyright © 2011 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form. 20 382068-EU-EN-V4.0 12/11