Manual - Martindale Electric
Contents
1. The CM54 is guaranteed against faults in manufacture and materials for 24 months from date of invoice and will be rectified by us free of charge provided the unit has not been tampered with and is returned to us with its housing unopened Damage due to dropping abuse or misuse is not covered by this guarantee Batteries and fuses are not covered by this guarantee 4 Connect the black amp red test probe tips to the circuit or device under test making sure it is de energised first 5 Open circuits will be displayed as an overload condition 6 Test lead resistance can affect low resistance measurements and should be subtracted from resistance measurements for accuracy Select the lowest resistance range and short the test leads together The value displayed is the test lead resistance which should subtracted from the resistance measurement 7 After completing the measurement disconnect the test leads Note when using 2000MQ Range The 2000MQ range has a fixed 10 count offset in the reading When the test leads are shorted together in this range the meter will display 010 This residual reading must be subtracted from the measured resistance when this range is used For example when measuring 1500MQ on the 2000MQ range the display will read 1510 from which the residual reading of 10 must be subtracted to obtain the actual resistance of 1500MQ 3 4 CONTINUITY TESTING 1 Select the 14 position by turning the rotary selector s2. functions and ranges In addition a protective carrying case is included for protection of the meter whilst not in use 1000 ACA CLAMP METER 1000 OFF 2000M Q P ar 20k 200 i 1000 sw 20k s 750 20M eg 200 Q 2000M ofr 1000 A 1 Volt Input Terminal This is the positive input terminal for VOLT measurements Connection is made to it using the red test lead 2 COM Common Terminal This is the negative Ground input terminal for all measurement modes except current Connection is made to it using the black test lead 3 Q Ohms input terminal This is the positive input terminal for resistance and continuity measurements Connection is made to it using the red test lead 4 Display The display indicates the measured value of signal function mode low battery range max amp hold settings 5 Function Range selector rotary switch The rotary switch selects the function and desired range 6 Max Maximum recording mode This function is used to measure the maximum value of AC DC voltage AC DC current and resistance 7 Hold Button Freezes the last reading displayed 8 Clamp Jaws Detect AC current flowing through the conductor on test 9 Trigger Press the lever to open the clamp jaws When the lever is released the jaws will close 2 SAFETY INFORMATION The instrument complies with class II overvoltage CAT III 1000V of the IEC1010 1 EN61010 1 UL3111 1 and CAN CSA C22 2 1010 1
3. 92 standards pollution degree 2 in accordance with IEC 664 indoor use If the equipment is used in a manner not specified the protection provided by the equipment may be impaired This product complies with the requirements of the following European Community Directives 89 336 EEC Electromagnetic Compatibility and 73 23 EEC Low Voltage as amended by 93 68 EEC CE Marking Electrical noise or intense electromagnetic fields in the vicinity of the equipment may disturb the measurement circuit Measuring instruments will also respond to unwanted signals that may be present within the measurement circuit Users should exercise care and take appropriate precautions to avoid misleading results when taking measurements in the presence of electromagnetic interference 3 OPERATION 3 1 VOLTAGE MEASUREMENTS 1 Turn off power to the circuit device under test and discharge all capacitors 2 Plug the black test lead into the COM input jack on the meter and connect the test lead tip to a grounded point the reference point for measured voltage 3 Select the desired AC voltage range V or DC voltage range V If the magnitude of the voltage to be measured is unknown always start with the highest range WARNING To avoid possible electric shock instrument damage and or equipment damage do not attempt to take any voltage measurements if the voltage is above 1000V DC or 750VAC These are the maximum voltages that this instrument is de
4. CM54 CLAMP METER INSTRUCTION MANUAL MARTINDALE CM54 ELECTRIC 1000 ACA CLAMP METER BHoLo A 1000 OFF 2000M Q 200 2 20M 4 kg o Tra To tt gt L x L Zg w 0o VRO 100 V 7 gt a O Re 5 2 3 2 7 l Op My 00 Q 2000M OFF 1000 A Wy a A f ee MAX B Q o 4 aN f i yw MARTINDALE e ELECTRIC Trusted by professionals CONTENTS Introduction Description Unpacking amp Inspection Replacing the Battery Safety Information Operation Voltage Measurement Current Measurement Resistance Measurement Continuity Testing Maintenance Cleaning Repair amp Service Storage Conditions Warranty Technical Specification SAFETY INFORMATION Always read before proceeding WARNING This manual contains both information and warnings that are necessary for the safe operation and maintenance of the clampmeter It is recommended that you read the instructions carefully and ensure that the contents are fully understood Failure to understand and to comply with the warnings and instructions can result in serious injury damage or even death In order to avoid the danger of electrical shock it is important that proper safety measures are taken when working with voltages exceeding 30V AC rms 42V AC peak or 60V DC The clampmeter must only be used under the conditions and for the purposes for which it has been constructed Particular attention should be paid to th
5. closed before taking a reading 3 The most accurate reading will be obtained by keeping the conductor across the centre of the clamp jaws 4 The reading will be indicated on the display 5 Reduce the range if set too high until a satisfactory best resolution reading is obtained Max Maximum recording mode This function is used to measure the maximum value of AC DC voltage AC DC current and resistance To use this function select the function and range then press the MAX button When this is done the MAX indicator will appear on the display When the instrument detects a signal the maximum MAX value will be displayed and held in the internal memory To cancel the function press the MAX button once again Hold Button Press HOLD to toggle in and out of data hold mode In the data hold mode the HOLD indicator is displayed and the last reading is frozen on the display Press the HOLD button again to exit and resume taking readings 3 3 RESISTANCE MEASUREMENTS WARNING Attempting resistance or continuity measurements on live circuits can cause electrical shock damage to the instrument and damage to the equipment under test Resistance measurements must be made on de energised DEAD circuits only for maximum personal safety The electronic overload protection installed in this instrument will reduce the possibility of damage to the instrument but not necessarily avoid all damage or shock hazards 1 Isolate any p
6. ese warnings the precautions the technical specifications and the use of the CM54 in dry surroundings Always inspect your clampmeter test leads and accessories for any sign of damage before use If any abnormal conditions exist e g broken test leads cracked case display not reading etc do not attempt to use it Do not expose it to direct sunlight excessive temperature or moisture Keep this instruction manual for future reference Updated instructions and product information are available at www martindale electric co uk SYMBOLS Equipment complies with relevant EU Directives AC Alternating Current Ground Direct Current Equipment protected by Double Insulation Class II Caution refer to accompanying documents Caution risk of electric shock End of life disposal of this equipment should be in accordance with relevant EU Directives 1 INTRODUCTION This manual contains information and warnings which must be followed to ensure safe operation of the clampmeter WARNING READ SAFETY INFORMATION BEFORE USING THE METER 1 1 Description This clampmeter is a handheld 2000 count instrument that is designed for use in the laboratory field servicing and any circumstance where high current measurement is required The clampmeter incorporates a finger guard which ensures the safety of the user whilst operating the instrument a rugged case that is shock resistant and fire retardant and electronic overload protection for all
7. han 750 9 0Vde ypica Overload Protection 500v DC or AC rms DC Volts Input Impedance Overload protection 1000VDC 750V AC RMS AC Volts Average sensing RMS indicating Input Impedance Frequency Response 50Hz to 500Hz Overload protection 1000VDC or 750V AC RMS AC Current Average sensing RMS indicating 0 600A 1 5 rdg 5d 50 60Hz 200A 100mA gt 600A 2 0 rdg 5d 50 60Hz 0 600A 3 0 rdg 5d 61 400Hz 1000A 1A gt 600A 3 5 rdg 5d 61 400Hz Overload Protection 1200A for 60 seconds Maximum Resistance 20022 0 10 20kQ 109 20MQ 10kQ 2000MQ 1000kQ2 1 2 rdg 4d 1 0 rdg 3d 2 0 rdg 5d 5 rdg 10d Overload Protection 500v DC or AC RMS Other products from Martindale 16th Edition Testers All in one s Calibration Equipment Continuity Testers Electrician s Kits Full Calibration amp Repair Service Fuse Finders Digital Clamp Meters Digital Multimeters Microwave Leakage Detectors Motor Maintenance Equipment Non trip Loop Testers PAT Testers amp accessories Phase Rotation Units Proving Units Socket Testers Thermometers amp Probes Test Leads Voltage Indicators Specialist Metrohm Testers 4 amp 5kV Specialist Drummond Testers Martindale Electric Company Limited Metrohm House Penfold Trading Estate Imperial Way Watford WD24 4YY UK Tel 44 0 1923 441717 Fax 44 0 1923 446900 E mail sales
8. martindale electric co uk Website www martindale electric co uk Martindale Electric Company Ltd 1997 2006 Registered in England No 3387451 Rev 4
9. olt one observing correct polarity 4 Replace the battery cover and re install the screw 4 Plug the red test lead into the VOLT input jack on the meter and connect to the circuit where a voltage measurement is required Voltage is always measured in parallel across a test point 5 Energise the circuit or device under test and make the voltage measurements Reduce the range setting if set too high until a satisfactory best resolution reading is obtained 6 After completing the measurement turn off the power to the circuit device under test discharge all capacitors and disconnect the meter test leads 3 2 CURRENT MEASUREMENTS WARNING The clamp jaws are designed to take current measurements on circuits with a maximum voltage difference of 500VAC between any conductor and ground potential Using the clamp jaws for current measurements on circuits above this voltage may cause electric shock instrument damage and or damage to the equipment under test Before measuring current make sure that the test leads are removed from the instrument The clamp jaws are overload protected up to 500VAC for up to 1 minute Do not take current readings on circuits where the maximum current potential is not known Do not exceed the maximum current that the instrument is designed to measure 1 Set function switch to ACA 1000A range 2 Press the trigger to open the clamp jaws and clamp them around a conductor The jaws should be completely
10. ower which may be present at the resistance to be measured and discharge any capacitors Any voltage that may be present during a resistance measurement will cause inaccurate readings and could damage the meter if the voltage exceeds the overload protection of 500V DC or AC 2 Insert the black amp red test leads into the COM and Q input terminals respectively 3 Select the desired ohms Q range 4 MAINTENANCE Maintenance consists of periodic cleaning and battery replacement Repairs or servicing not covered in this manual should only be performed by qualified personnel 4 1 Cleaning The CM54 may be cleaned using a soft dry cloth Do not use abrasives solvents or detergents which can be conductive 4 2 Repair amp Service There are no user serviceable parts in this unit Return to Martindale Electric Company Ltd if faulty Our service department will quote promptly to repair any fault that occurs outside the guarantee period Before the unit is returned please ensure that you have checked the unit and associated leads thoroughly for flat batteries check amp replace blown fuses check amp replace and other poor connections 4 3 Storage Conditions The clampmeter should be kept in warm dry conditions away from direct sources of heat or sunlight and in such a manner as to preserve the working life of the unit It is strongly advised that the unit is not kept in a tool box where other tools may damage it 5 WARRANTY
11. signed to measure The COM terminal potential should not exceed 500V measured to ground 1 2 Unpacking and Inspection Before unpacking the clampmeter examine the shipping carton for any sign of damage Unpack and inspect the clampmeter and any associated leads for damage If there is any damage then consult your distributor immediately After removing your new Digital Clamp Meter DCM from its packaging you should have the following items 1 Digital clampmeter 2 Test lead set one black one red 3 9 Volt battery installed in meter 4 Instruction manual 5 Protective carry case If any of the above items are missing or are received damaged please contact the distributor from whom you purchased the unit 1 3 REPLACING THE BATTERY WARNING To avoid electrical shock disconnect the test leads and any input signals before replacing the battery Replace only with same type of battery This meter is powered by a NEDA type 1604 or equivalent 9 volt battery When the meter shows the E2 sign the battery must be replaced to maintain proper operation Follow the procedure below to replace the battery 1 Disconnect the test leads from any live source turn the rotary switch to off and remove the test leads from the input terminals 2 The battery cover is secured to the bottom case by a screw Using a Phillips head screwdriver remove the screw and then remove the battery cover 3 Replace the battery with a new equivalent 9 v
12. witch 2 Follow steps 2 amp 4 as for resistance measurements 3 The clampmeter emits a tone when measuring resistance of approximately 75Q or less After measurements have been carried out disconnect the test leads from the circuit and from the input terminals of the clampmeter MARTINDALE Specification ELECTRIC CMo54 Clamp Meter 3 rs e EA H Display 3 digit 21mm large LCD maximum reading 1999 with function and units sign annunciators Polarity Automatic positive implied negative indicated Over Range Indication OL is displayed Low Battery Indication The 5 is displayed when the battery voltage drops below accurate operating level Display Update Rate 2 5 per second nominal Operating Environment 0 C to 50 C at lt 70 Relative Humidity Storage Environment 20 C to 60 C at lt 80 Relative Humidity with battery removed from meter Temperature Coefficient 0 1 X specified accuracy C lt 18 C or gt 28 C Altitude 2000M max Power Standard 9 volt battery NEDA 1604 IEC 6F22 JIS 006P PP3 Battery Life 300 hours typical with alkaline battery Jaw Opening Capability 57mm conductor 70 X 18mm bus bar Size H x W x D 189 x 87 x 37mm Weight Approx 540grams including battery Accuracy is given as of reading number of least significant digits at 18 C to 28 C with relative humidity up to 70 Continuity Test Audible Threshold Open Circuit vot Less t
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