AC/DC True RMS Power Clamp Meter ELECTRONIC TEST INSTRUMENTS MODEL 325
CONTENTS 1. FEATURES ................................................ 2 2. Safety precaution ........................................ 2 Symbols Description .................................... 3 3. Specifications.............................................. 4 4. Electrical Specifications ................................ 4 800A rms ........................................... 4 800Arms (60 second).............................. 4 DC 500V AC500V rms ............................ 5 600V rms .....................
25 1. FEATURES Thank you for purchasing this instrument. Please read this instruction manual carefully and completely before using the digital clamp meter. Correct operation will insure the best performance and decrease the possibility of damages. 2. SAFETY PRECAUTION CAUTION Take extreme care for the conditions while measuring following 1. Measuring voltage over 20V as it may cause human body electricity conduction. 2. Measure AC power. 3.
325 8. In order to avoid reading incorrect data, replace the battery immediately when the symbol “ ” appears on the LCD. 9. In order to avoid the damage caused by contamination or static electricity, do not touch the circuit board before you take any adequate action. 10. Operating Environment: Indoors use. This instrument has been designed for being used in an environment of pollution degree 2. 11. Operation Altitude: Up to 2000M. 12. Operating Temperature & Humidity: 5 ? ~ 40 ? ,below 80%RH. 13.
325 3. SPECIFICATIONS 1. Display: 3 3/4 digits LCD with max. reading 3999, plus decimal point, unit symbol indication. 2. Overload Indication: LCD will show “OL” in the left highest position. 3. Low Battery Indication: Replace battery immediately when LCD displays “ ”. 4. Sampling Rate: 2 times per second for digital display. 5. Power Supply: 9V NEDA 1604 IEC 6F22 JIS 006P battery x 1pc. 6. Battery Life: About 200 hours. 7. Jaws opening: Max. 36 mm. 8. Conductor size: Max. 35mm. 9.
325 AC CURRENT (TRUE RMS:From 10% to 100% of range) Range 400A 600A Resolution 0.1A 1A Accuracy 40Hz~65Hz 65Hz~1kHz ± (2.0%+5) ± (3.0%+8) ± (2.0%+5) ± (3.0%+8) Overload Protection 800A rms (60 second) CURRENT 1 mS PEAK HOLD Range 400A 600A Resolution 0.1A 1A Overload Protection 600V rms Accuracy ± (1.5%+15) ± (2.5%+15) DC VOLTAGE Range 400V 600V Resolution 0.1V 1V Accuracy Overload Protection ± (1.
325 4000Ω 1Ω ± (1.0%+3) 0.4VDC Accuracy Max. Sensibility ± (0.5%+3) 5Vrms 600V rms Frequency Test Range Resolution 4KHZ 1HZ 40KHZ 10HZ 400KHZ 100HZ 5. Overload Protection DC600V AC600V rms INSTRUMENT DESCRIPTION (fig.1) 1. Inductive clamp jaw. 2. Safety guard. 3. HOLD button 4. Rotary switch Selector. 5. MAX/MIN key. 6. LCD 7. V/O Jack 8. COM Jack 9. PEAK-H 10. ZERO button. 11. Jaw Trigger.
325 Fig.
325 6. ALIGNMENT MARKS Put the conductor within the jaws on intersection of the indicated marks as much as possible (Figure 2) in order to meet the meter accuracy specifications. Fig.2 7. MEASUREMENT 7-1. DC CURRENT (DCA) MEASUREMENT WARNING Make sure that all the test leads are disconnected with the meter’s terminal for current measurement. 1. Set the rotary switch to A . 2. Check if the display shows zero in advance. If the display doesn’t show zero, press ZERO key. 3.
325 6. If the reading is difficult, press the HOLD key to hold the obtained value. To exit from this function press HOLD key again. The analogy barograph isn’t affected of enabling of this function. CORRECT INCORRECT Current Flow Current Flow Fig.3 7-2. AC CURRENT (ACA) MEASUREMENT WARNING Make sure that all the test leads are disconnected with the meter’s terminal for current measurement. 1. Set the rotary switch to A ~ . 2. Open the clamp and put the tested conductor in the center of the clamp jaw. 3.
325 7-3. DC VOLTAGE (DCV) MEASUREMENT WARNING Max. input for DCV or ACV is 600V. Do not attempt to take any voltage measurement which exceeds the limits. Exceeding the limits could cause electrical shock and damage the clamp meter. 1. Set the rotary switch to V . 2. Plug the test leads into the jacks. The red test lead plugs into V/O jack, and the black test lead plugs into COM jack. 3.
325 2. Plug the test leads into the jacks. The red test lead plugs into V/O jack, and the black test lead plugs into COM jack. 3. Connect the two long ends of test leads with the desired circuit, and then the reading will be displayed with automatic detection of the appropriate range. 4. If the reading is difficult, press the HOLD key to hold the obtained value. To exit from this function press HOLD key again. The analogy barograph isn’t affected of enabling of this function. 7-5.AC+DC WATT MEASUREMENT 1.
325 1. Set the rotary switch to O . 2. Plug the test leads into the jacks. The red test lead plugs into V/O jack, and the black test lead plugs into COM jack. 3. Connect the two long ends of test leads with the desired circuit, then the reading will be displayed with automatic detection of the appropriate range. 4. If the reading is difficult, press the HOLD key to hold the obtained value. To exit from this function press HOLD key again. The analogy barograph isn’t affected of enabling of this function.
325 7-8.FREQUENCY MEASUREMENTS WARNING Max. input for DCV or ACV is 600V. Do not attempt to take any voltage measurement which exceeds the limits. Exceeding the limits could cause electrical shock and damage the clamp meter. 1. Set the rotary switch to Hz. 2. Plug the test leads into the jacks. The red test lead plugs into V/O jack, and the black test lead plugs into COM jack. 3.
325 ? ZERO relative function 1.The ZERO relative function subtracts an OFFSET (stored when the key has been pressed) from the present measurements and displays the result. 2.To enable this function press the ZERO key for less than 1 second. Consequently on the display will appear the message "ZERO" and the relative value. 3.Pressing the ZERO key again for less than 1 second the display will show the offset; and the message "ZERO" start blinking.
325 This value will be automatically update if a lower value will occur. 4. Pressing again the MAX/MIN key less than 1 second, the blinking message “MAX MIN” will appear on the display. In this mode the clamp measures and store the minimum and the maximum values of the selected quantity. To get the minimum or maximum stored value press less than 1 second the MAX/MIN key until the display shows the desired quantity. l l The MAX/MIN function will be disable if: The MAX/MIN is pressed for more than 1 second.
325 Fi g 4 The PEAK -H function will be disable if: l The PEAK-H is pressed for more than 1 second. l The position of the rotary switch is changed. ? AUTO POWER OFF function 1. In order to save the battery the clamp will be switched off 30 minutes later last selecting function or changing range operation. 2. If this function is enabled the symbol is displayed. 3. To disable this function select OFF position then select the V~ position while the MAX/MIN key is pressed. 4.
325 equivalent DC value that causes the same amount of heat to be dissipated in a resistor. True RMS measurement greatly simplifies the analysis of complex AC signals. Since the RMS value is the DC equivalent of the original waveform, it provides a reliable basis for comparing dissimilar waveforms. By contrast, many meters use average-responding AC converters rather than true RMS converters. The scale factor in these meters is adjusted so that they display the RMS value for a harmonic-free sine wave.
325 AC coupled Input Waveform Peak Peak 0-Peak RMS CAL (*) 27E DC components only TRUE RMS 2 AC + DC 2 Sine Rectified sine (Full Wave) Rectified sine (Half Wave) 2.828 1.414 1.000 1.000 0.000 1.000 1.414 1.414 0.421 0.436 0.900 1.000 2.000 2.000 0.779 0.771 0.636 1.000 2.000 1.000 1.111 1.000 0.000 1.000 1.414 1.414 0.875 0.707 0.707 1.000 2.000 2.000 4.442K 2K 2D 2√D 3.464 1.732 0.962 1.000 0.000 1.
325 5. Put the battery cover back to its right place and tighten it with screws. ? Maintenance and Cautions 1. This meter is a precision digital instrument. Whether in use or in storage, please do not exceed the specification requirements to avoid any possible damage or danger 2. during in operation. 3. Do not use strong / abrasive detergents , water or wet cloth to clean the instrument. 4. Do not put the instrument in high temperature or in humid condition. Being exposed to direct sunlight is prohibited.
Limited One-Year Warranty B&K Precision Corp. warrants to the original purchaser that its product and the component parts thereof, will be free from defects in workmanship and materials for a period of one year from the data of purchase. B&K Preci sion Corp. will, without charge, repair or replace, at its’ option, defective product or component parts. Returned product must be accompanied by proof of the purchase date in the form a sales receipt. To obtain warranty coverage in the U.S.A.
Service Information Warranty Service: Please return the product in the original packaging with proof of purchase to the below address. Clearly state in writing the performance problem and return any leads, connectors and accessories that you are using with the device. Non-Warranty Service: Return the product in the original packaging to the below address. Clearly state in writing the performance problem and return any leads, connectors and accessories that you are using with the device.
B&K Precision 22820 Savi Ranch Parkway Yorba Linda, CA. 92887 P/N.
