30 A current clamp User's Guide
Contents
1. Maximum input ranges Observe all ratings and warnings marked on the clamp The table below indicates the full scale measurement and overcurrent protection ranges The full scale measurement ranges are the maximum currents that can be accurately measured by the clamp The overcurrent protection range is the maximum current that will not damage the clamp Full scale measurement Overcurrent protection range range current that will not damage O to 20 A AC 0 to 30 A DC 500 A for 60 s WARNI NG Signals exceeding the voltage limits in the table below are defined as hazardous live by EN 61010 Signal voltage limits of EN61010 70 V DC 33 V AC RMS 46 7 V pk max CAUTI ON Exceeding the overcurrent protection range can cause permanent damage to the clamp and other connected equipment AN WARNI NG To prevent electric shock e Do not attempt to measure currents outside the specified full scale measurement ranges above e Take all necessary safety precautions when working on equipment where hazardous live voltages may be present e This product must be used only by qualified personnel practising applicable safety precautions e Dodo not use the clamp if it appears to be damaged in any way and stop using it immediately if you are concerned by any abnormal behavior e Always ensure that the clamp is removed from any live electrical circuit before removing the battery cover e Do not use in wet or damp conditions or near exp2. Specifications Electrical data 30 A AC peak or DC Measuring range 30 mA to 30 A DC accurate 5 mA to 30 A DC usable 500 A for 60 s 100 mV A Accurac 2 of reading 2 mA 1 mA DC after filtering di dt tracking capabilit gt 20 A us Conductor position 1 relative to center sensitivit coefficient 0 1 x specified accuracy C 0 C to 18 C 28 C to 50 C DC to 20 kHz 0 5 dB Battery type 9 V PP3 MN 1604 6F22 6LR61 Battery life 100 hours typical alkaline Min load impedance All accuracies stated at 23 C 5 C 70 RH max General data connectors with safety BNC connector 5 C to 40 C Storage temperature 20 C to 70 C excluding battery O to 80 RH Standards EN 61010 2 032 2012 CAT IV 600 V CAT II 1000 V EN 61326 2 2 2006 0 5 0 0 0 5 1 0 1 5 2 0 78 100 1k 10k 20k Gain dB Frequency Hz Warranty Your current clamp is guaranteed for one year from the date of purchase against defective material or workmanship If the clamp fails during the warranty period we shall at our discretion repair or replace it with a new or reconditioned unit provided we are satisfied that the failure is due to defective material or workmanship To make a claim under warranty return the clamp to us postage prepaid with a description of the defect The use of a battery other th
3. an that specified invalidates this warranty Goods alleged by the buyer to be defective shall not form the Subject of any claim for injury loss damage or any expense howsoever incurred whether arising directly or indirectly from such alleged defects other than death or personal injury resulting from the seller s negligence No condition is made or to be implied nor is any warranty given or to be implied as to the life or wear of goods supplied or that they will be suitable for any particular purpose or for use under specific conditions notwithstanding that such purpose or conditions may be made known to the seller Pico Technology James House Colmworth Business Park St Neots Cambridgeshire PE19 8YP United Kingdom Tel 44 0 1480 396395 Fax 44 0 1480 396296 Technical Support Support picotech com Web www picotech com Pico Technology and PicoScope are registered trademarks of Pico Technology Ltd Copyright 2015 Pico Technology All rights reserved DO247 2 Made in Korea CER TA234 oe ee 30 A current clamp Z O E 2 gt feeoovA OAT m30A QAN iia L L ONH li Max Current 20A RMS Output 100m A c User s Guide Introduction The TA234 is a 30 A current clamp It has extended measuring jaws that allow measurement in a confined space When measuring DC a simple thumbwheel on the clamp allows zero adjustment Safety information To preven
4. losive gas or vapor e Do not hold the clamp anywhere beyond the tactile barrier see Fig 1 Operating instructions Current measurement 1 Switch on the clamp using the ON OFF switch and check that the green POWER LED is lit 2 The red LOW BAT LED lights when the battery voltage is too low for normal operation Follow the procedure described below for changing the battery Connect the output BNC connector to the oscilloscope Ensuring that the jaws are closed but not clamped around or placed near a current carrying conductor turn the DC ZERO dial until the oscilloscope displays zero signal Repeat this procedure whenever the zero point drifts due to temperature changes 5 Clamp the jaws around the conductor ensuring a good contact between the closing faces of the jaws 6 Take measurements from the oscilloscope If using PicoScope select the 30 A current clamp probe to display the current in amperes For other oscilloscopes apply a conversion factor of 100 mV A Positive output indicates that the current is in the direction of the arrow marked on the fixed jaw a Remanence effect When measuring DC current a remanence effect can temporarily prevent zeroing of the clamp If this happens open and close the jaws several times and zero again If the jaws become magnetized by accidental exposure to a current greater than 30 A fit the clamp around the conductor in the opposite direction to reverse the magnetizati
5. on then remove from the conductor and zero the clamp Care of the product The product contains no user serviceable parts Repair servicing and calibration require specialized test equipment and must be performed only by Pico Technology or an approved service provider There may be a charge for these services unless covered by the warranty CAUTION Do not tamper with or disassemble the clamp Internal damage will affect performance WARNING When cleaning the clamp use a soft cloth and a solution of mild soap or detergent in water To prevent electric shock do not allow liquids to enter the casing as this will compromise the components inside Battery replacement The red LOW BAT LED Fig 1 will light when the minimum battery voltage is approached Use the following procedure to replace the battery 1 Turn off the clamp using the ON OFF switch and disconnect the output lead from external equipment 2 Loosen the captive screw that secures the battery cover and lift off the cover Replace the battery refit the battery cover and fasten the screw Jaws Tactile barrier Jaw trigger Zeroing thumbwheel On off range switch Power LED Low battery LED Output connector CON ODUBWNE m pa Q D L Kii E pA 5 qra rome T E a OTO Pa Figure 1
6. t possible electrical shock fire personal injury or damage to the product carefully read this safety information before attempting to install or use the clamp In addition follow all generally accepted safety practices and procedures for working with and near electricity The clamp has been designed and tested in accordance with the European standard publication EN 61010 1 2010 and left the factory in a safe condition The following safety descriptions are found throughout this guide A WARNING identifies conditions or practices that could result in injury or death A CAUTION identifies conditions or practices that could result in damage to the product or equipment to which it is connected Symbols These safety and electrical symbols may appear on the clamp or in this guide Direct current o W Alternating current AT Both direct and alternating current O Equipment protected through double or reinforced insulation A Possibility of electric shock A e i iyi IEC 61010 overvoltage category Do not dispose of this product as unsorted municipal waste Contact a qualified recycler for disposal or mmm Eturn it to the manufacturer WARNI NG To prevent injury or death use the clamp only as instructed Protection provided by the product may be impaired if used other than in the manner specified CAUTI ON To prevent damage always use and store your current clamp in appropriate environments see Specifications
Download Pdf Manuals
Related Search