User’s Guide MINI AC/DC CLAMP-ON MULTIMETER ADAPTOR Model 380945 Introduction Congratulations on your purchase of the Extech Mini 200A AC/DC Clamp-On MultiMeter Adaptor. The 380945 Clamp Adaptor measures temperature and displays the results on a multimeter or oscilloscope. There is no need to break circuits when measuring current with a clamp device, simply open the meter jaw and clamp around the conductor under test. With careful use, this device will provide years of reliable service. Specifications Ranges Output to multimeter Accuracy 0 - 4A DC 100mV per ADC ± (2.0% + 5mA) 0 - 40A DC 10mV per ADC 0 - 150A DC 1mV per ADC 150 – 200DC ± (1.0% + 20mA) ± (1.0% + 200mA) ± (2.2% + 200mA) 0 – 4A AC 100mV per AAC ± (2.0% + 5mA) 0 to 40A AC 10mV per AAC ± (1.5% + 30mA) 0 - 150A AC 1mV per AAC 150 – 200A AC ± (1.5% + 300mA) ± (2.2% + 300mA) Measurement Examples 380945 Range Current Measurement Multimeter display 4A Range 2A 200mV 40A Range 25A 25mV 100A 100mV 200A Range Jaw size AC Bandwidth Power Power indication Low Battery indication Power consumption Operating conditions Storage conditions Altitude Dimensions Weight 0.9” (23mm) max 40Hz to 1kHz Two (2) 1.5V ‘AA’ batteries Power status LED Red status LED 6mA (approximately) o 14° to 122°F (-10 to 50 C), <85% R.H. o -4° to 140°F (-20 to 60 C), <75% R.H. Operate below 2000 meters. For indoor use only. 7.2 x 2.5 x 1.4” (183 x 61.3 x 35.6mm) 6.7oz (190g) Safety Information Safety Symbols This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information. This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages may be present WARNING: CAUTION: This indicates that a potentially hazardous condition which, if not avoided, could result in death or serious injury. This indicates that a potentially hazardous condition which, if not avoided, could result in injury or damage to the meter. Safety Precautions 1. WARNING: Improper use of this meter can cause damage, shock, injury or death. Read and understand this user's manual before operating the meter. 2. Make sure any covers or battery doors are properly closed and secured. 3. Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC. These voltages are considered a shock hazard. 4. Remove the battery if the adaptor is to be stored for long periods. Model 380945 Version 1.1 October 2002 Panel Description 1. 2. 3. 4. 5. 6. 7. Transformer jaw Jaw trigger ON/OFF and range switch Zero button Power-On LED Low battery LED Output terminals 1 2 3 4 56 7 AC and DC Current Measurements The 380945 Clamp Meter must first be connected to the Multimeter or Oscilloscope that will be displaying the measurement results. For multimeters, this is accomplished using the red and black test leads. Connect the red lead from the 380945 positive terminal to the multimeter positive voltage terminal. Connect the black lead from the 380945 negative terminal to the multimeter’s negative or COM terminal. For Oscilloscope connections use a ‘Y’ cable (BNC to two standard test leads), connect the BNC to the Oscilloscope input and connect the test leads to the 380945 output terminals. 1. Set the multimeter or oscilloscope to a mV or low voltage range. Use an AC Volt range for AC current measurements or a DC Volt range for DC current measurements. Note that for AC measurement applications, a true rms multimeter is strongly recommended for best accuracy. 2. Determine the highest anticipated current reading and set the 380945 range accordingly. If the approximate range of the measurement is not known, start with the 200A range and work downward. 3. If the POWER status LED does not light when a range is selected, the batteries may require replacing (refer to battery replacement section later in this guide). 4. For DC measurements, press the 380945 ZERO button (with no conductor in the jaw) to zero the meter. 5. Press the Jaw Trigger to open the jaw. Clamp around a single conductor (refer to the diagram below on correctly clamping around a conductor). 6. The 380945 will output a millivolt signal to the multimeter proportional to the current it measures. 7. Read the Current measurement on the multimeter or oscilloscope display. If needed, refer to the specifications chart earlier in this manual for details on interpreting the displayed measurement. Yes No Connecting the 380945 to a Multimeter Clamping around a conductor Model 380945 Version 1.1 October 2002 Battery Replacement The Low Battery status LED lights when the battery voltage falls to a critical level. To replace the two (2) 1.5V ‘AA’ batteries, open the rear battery compartment by removing the Phillips head screw (back, center of meter). Replace the batteries and re-assemble the compartment. Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website at www.extech.com (click on ‘Contact Extech’ and go to ‘Service Department’ to request an RA number). A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied. Support Hotline (781) 890-7440 Tech support: Ext. 200; Email: [email protected] Repair/Returns: Ext. 210; Email: [email protected] Website: www.extech.com Copyright © 2002 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form. Model 380945 Version 1.1 October 2002