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1. 19 General Specifications 19 Technical Specifications 20 MAINTENANCE sena rain 24 General Maintenance 24 Battery Replacement 0nanaaoeanenan anane 25 Test Leads Replacement asane suse 25 Contact Dawson een 25 DAWSON LIMITED WARRANTY AND LIMITATION OF LIABILITY This instrument from Dawson Tools Inc will be free from defects in workmanship and material for three years from the date of original purchase This warranty does not cover defects resulting from damage caused by the user such as drops neglect misuse unauthorized alteration usage outside of specified conditions contamination or improper repair maintenance To receive service on the instrument if it becomes necessary during the warranty period contact your nearest Dawson authorized service center at 800 898 6991 or visit www DawsonTools com to obtain a return authorization within the US only Areturn authorization is necessary before returning any instrument to Dawson no service will be provided without areturn authorization The user is responsible for properly packing the unit and charges such as shipping freight and insurance charges The extent of Dawson s liability is limited solely to the repair replacement of the instrument The above warranty in its entirety is inclusive and no other warranties written or oral are
2. 1 2 reading 3 digits Continuity Function Resolution Description The meter will beep if 01 0 10 measured resistance is less than 500 Over voltage protection 250V DC AC rms Diodes Function Resolution Description E 0 001V Displays forward biased voltage drop Forward DC current 1mA Reverse DC voltage 3 3V Over voltage protection 250V DC AC rms ei Over voltage protection 250V DC or AC RMS Maintenance General Maintenance To avoid possible electric shock or personal injury repairs or servicing not covered in this manual should be performed only by qualified personnel Before opening the meter remove test leads from all circuits to avoid damage to the meter or personal injury To avoid electrical shock remove test leads from input jacks before cleaning To avoid false readings that could lead to possible electric shock replace the batteries as soon as the low battery indicator appears e Clean the instrument case with a damp cloth and mild detergent Do notuse abrasives or chemical solvents Keep in mind the internal capacitors may retain dangerous voltages even when the instrument is turned off Remove the batteries if the meter is not going to be used for an extended period of time 24 DAWSON Battery Replacement ZA WARNING REMOVE THE TEST LEADS FROM THE METER BEFORE REMOVING THE BATTERY CASE
3. DAWSON DCM730 Digital Clamp Meter User s Manual ALL A E MAX cari 10004 Dawson mem DCM730 6000 Counts AC CLAMP METER E MAXMIN CIP REL E DAWSON Table of Contents LIMITED WARRANTY AND LIMITATION OF LIABILITY 1 Qutof ING BOX ames SANE aaa Ta agi 1 Safety Information ee 2 INTRODUCTION osaanssnnnnnsnnnnnnnnnnnnnnnnnnnnnna 4 Components and Buttons 6 Names of the Components 6 Switches and Buttons 9 Display EE 10 USING THE METER 11 Display Hold eser erede aba ace Ts 11 Manual Mode uuu lae nan aa ie azar aan gak 11 MAXIMIN Display seem 11 Switching Between Functions 11 Backlight and clamp light 12 Auto Power Off cease eaa dada 12 Measurement Preparation 12 AG GCUFTetiE uu cias ced vo gea a tw Ten dia ES ces 13 DAWSON Table of Contents ACIDGC Voltage u kanan rl eie ae a ani 13 Frequency and Duty Cycle 14 Resistance iii E 16 DIOdeS zmena asik a a 17 CONN s ku Kae anakan nana tik qaspay ode 17 CapacitanC6s cs44Aioasssnapas aa aa Ag a GAN 18 Non Contact Voltage NCV 18 SPECIFICATIONS
4. pt position The default mode is diode mode 3 Connect the red lead to the anode and the black lead to the cathode 4 Read the measured forward biased voltage drop on the display Note If the leads are connected backwards or to an open circuit the display will show OL Continuity ZA WARNING TO AVOID ELECTRICAL SHOCK AND INJURY TURN OFF POWER TO THE CIRCUIT AND DISCHARGE ALL CAPACITORS BEFORE MEASURING CONTINUITY 1 Insert the black test lead into COM jack and red test lead into INPUT jack 2 Turn the rotary switch to the o position Press FUNC to switch to continuity mode 2 Connect the test leads across the circuit to be tested 3 Read the measured resistance value on the display 4 If the resistance is less than 500 the meter s buzzer will sound 17 DAWSON Note If the resistance is higher than 6000 or the leads are disconnected the display shows OL Capacitance AN WARNING TO AVOID ELECTRICAL SHOCK AND INJURY TURN OFF POWER TO THE CIRCUIT AND DISCHARGE ALL CAPACITORS BEFORE MEASURING CAPACITANCE 1 Insert the black test lead into COM jack and red test lead into INPUT jack 2 Turn the rotary switch to the J position 3 Connect the test leads across the circuit to be tested 4 Read the measured capacitance value on the display Note For better accuracy on measurements below 10nF touch the tips of the leads together bef
5. TO AVOID ELECTRICAL SHOCK AND INJURY 1 Replace the batteries once the display shows to avoid false readings 2 Remove test leads and unscrew the battery cover and remove the cover 3 Replace the used batteries with new ones 4 Replace the battery cover and tighten the screw Note Double check the polarity of the batteries before replacing Test Leads Replacement AN WARNING REPLACE THE TEST LEADS WITH IDENTICAL OR COMPATIBLE LEADS LEAD SPECS 1000V 10A Replace test leads if leads become damaged or worn Contact Dawson Dawson Tools Inc 1142 S Diamond Bar Blvd 4858 Diamond Bar CA 91765 Phone 310 728 6220 www DawsonTools com ms 00 05 0000
6. and actions that a failure to follow the instructions could result in false readings damage the meter or the equipment under test 03 DAWSON Introduction Overview DCM730 is a portable hand held professional meter that measures AC DC voltage AC current resistance capacitance diodes continuity frequency duty cycle and non contact voltage This meter is easy to use with one hand suitable for professional users or amateurs and ideal for school or home use Precautions Users must follow standard safety instructions while using the meter 1 Once the meter is out of the package check for any damage to the meter before using 2 Double check the meter to make sure all the components are in good condition 3 Check the test leads before operation Check the test leads for damage to the insulation or wires before use 4 Use the original test leads included in the package for best performance and safety If necessary use compatible leads with same specifications as the originals 5 Make sure to set the meter to the correct functions and measuring range 6 Do not use the Meter on a circuit where the measuring range is over the capable range specified in the User s manual 7 Do not touch the tips of the test leads when performing measurement 8 If the measurement is above 60V DC or 30V AC make sure to keep fingers behind the barrier and finger guards 9 Do not use the meter on a circuit if the vol
7. NPUT A d abar d T AC CLAMP METER 7 9 mm C MAXMIN EY A REL x PF Ja x is Lp oe UE TET P s 0 07 DAWSON DAWSON Switches and Buttons FUNC button to switch between functions RANGE button to switch to manual range Bil button to hold the reading or to turn on backlight MAX MIN button to switch between max and min display Hz button to switch between frequency and duty cycle NCV button to activate non contact voltage detection Rotary Switch switch between measurement modes INPUT Input jack for measuring voltage resistance capacitance diodes continuity frequency duty cycle COM Common input jack DAWSON Display qu MAX MIN Eon REL r _ DC unF Hz AC kMO P m m m mVA AC DC Alternating current Direct current DF on Diode continuity AUTO Auto range mode MAK Maximum measurement MIN Minimum measurement eo Auto power off E Low battery H Display hold Percentage duty cycle mV V MilliVolt Volt voltage A Amp current nF uF Nanofarads microfarads millifarads Q KQ MQ Ohms kilohms megaohms Hz kHz MHz Hertz kilohertz megahertz 10 DAWSON Using the Meter Display Hold During measurement press I e to hold the current reading on the display Press again to release th
8. cancel out readings Only measure one conductor at a time For bestresults keep the conductor in the middle of the clamp lt A indicates the maximum input AC Current is 1000 A ACIDC Voltage AN WARNING USE CAUTION WHEN MEASUREING HIGH VOLTAGE CIRCUITS TO AVOID ELECTRICAL SHOCK AND INJURY DO NOT MEASURE INPUT VOLTAGES HIGHER THEN 600V AC DC 1 Insert the black test lead into COM jack and red test lead into INPUT jack 2 Turn the rotary switch to the Vzz The default mode is DC voltage press FUNC to switch to AC voltage if necessary press FUNC to switch back to DC voltage 2 Connect the test leads across the voltage source or load 3 Read the measured voltage value on the display 13 DAWSON Note When measuring small voltage sources the display will show unsteady readings until the leads are connected to the circuit This is normal due to the high sensitivity of the meter The meter will display the correct reading once the leads are connected to the circuit W indicates the maximum input voltage is 600V DC AC In mV range the maximum input voltage is 600mV DC AC Inthe mV range the meter will beep if the reading is greater than 600mV DC AC Frequency and Duty Cycle In Current Mode A AN WARNING REMOVE THE TEST LEADS FROM THE METER WHEN PERFORMING A CURRENT MEASUREMENT WITH THE CLAMP TO AVOID ELECTRICAL SHOCK AND INJURY 1 Turn t
9. e hold Manual Mode The default range in voltage and resistance modes is auto To switch to manual range press RANGE and the display switches to manual mode Each press of the button increases the range and returns to the lowest range when pressed in the highest range Hold RANGE to switch back to auto range Note In current mode manual is the only mode available In frequency and capacitance modes only auto range is available MAX MIN Display Press MAX MIN to show the maximum value recorded since the button was pressed Press MAX MIN again to show the minimum value recorded since the button was pressed Hold MAX MIN to return the display to normal Note The meter is setto manual mode when in Max Min mode The meter cannot display Max Min measurements when in frequency duty cycle capacitance diode or continuity modes Switching Between Functions When the meter is in voltage mode press FUNC to switch between DC and AC voltage When the meter is in diode continuity mode press FUNC to switch between them 11 DAWSON Backlight and clamp light e Hold I e to turn on the display backlight the backlight will stay on for 30 seconds before it automatically turns off To turn off the backlight manually hold B again When the meter is in current mode turning on the backlight will also activate the worklight making it easier to use the clamp in dark a
10. expressed or implied Out of the Box Check the meter and accessories thoroughly before using the meter Contact your local distributor if the meter or any components are damaged or malfunction Accessories Test leads 1pc User s manual 1pc 1 5V AAA battery 3pc Case 1pc 01 DAWSON Safety Information AN WARNING TO REDUCE THE RISK OF FIRE ELECTRICAL SHOCK DAMAGE TO THE INSTRUMENT OR PERSONAL INJURY PLEASE FOLLOW THE SAFETY INSTRUCTIONS DESCRIBED IN THE USER MANUAL AN WARNING TO ENSURE SAFE OPERATION AND LIFE OF THE METER DO NOT PLACE THE METER IN ANY ENVIRONMENT WITH HIGH PRESSURE HIGH TEMPERATURE DUST EXPLOSIVE GAS OR VAPOR Safety Symbols Symbol Definition A Important safety message C Conforms to relevant European Union directives Dangerous voltage may be present n Double Insulation Protection Class ll CONFORMS TO UL STD 61010 1 m IEC 61010 2 032 oN CERTIFIED TO CSASTD C22 2 Intertek No 61010 1 and IEC 61010 2 032 DAWSON This product has been tested to the requirements of CAN CSA C22 2 No 61010 1 second edition including Amendment 1 or a later version of the same standard incorporating the same level of testing requirements Ground Warning Symbols ZA WARNING Risk of danger important safety information See User s manual ZA CAUTION Statement identifies conditions
11. he rotary switch to the current position with the correct range 2 Press the clamp trigger to open the clamp and insert the conductor to be measured 3 Press Hz button to measure frequency 4 Press Hz again to measure duty cycle if necessary 5 Read the measured frequency or duty cycle value on the display 14 DAWSON Note Measuring two or more conductors will cancel out readings Only measure one conductor at a time AA indicates the maximum input current is 1000A AC RMS Frequency range is 10Hz 1kHz When the frequency being measured is less than 10Hz or if the frequency is higher than 1kHz the accuracy is not guaranteed In Voltage Mode V AN WARNING DO NOT MEASURE VOLTAGES OF MORE THAN 600V AC TO AVOID ELECTRICAL SHOCK AND INJURY 1 Insert the black test lead into COM jack and red test lead into INPUT jack 2 Turn the rotary switch to the V position Press FUNC to switch to AC voltage 3 Press Hz button to measure frequency 4 Press Hz again to measure duty if necessary 5 Connect the test leads across the voltage source or load 6 Read the measured frequency or duty cycle value on the display Note A indicates the maximum input voltage is 600V AC RMS Frequency range is 10Hz 10kHz When the frequency being measured is less than 10Hz or if the frequency is higher than 10kHz the accuracy is not guaranteed 15 DAWSON I
12. n Hertz Mode Hz AN WARNING DO NOT MEASURE INPUTS OF MORE THAN 250V AC TO AVOID ELECTRICAL SHOCK AND INJURY 1 Insert the black test lead into COM jack and red test lead into INPUT jack 2 Turn the rotary switch to the Hz position The default mode is frequency press Hz to switch to duty cycle if necessary 3 Connect the test leads across the voltage source or load 4 Read the measured frequency or duty cycle value on the display Note Frequency range is 10Hz 10kHz When the frequency being measured is less than 10Hz or if the frequency is higher than 10kHz the accuracy is not guaranteed Resistance A WARNING TO AVOID ELECTRICAL SHOCK AND INJURY TURN OFF POWER TO THE CIRCUIT AND DISCHARGE ALL CAPACITORS BEFORE MEASURING RESISTANCE 1 Insert the black test lead into COM jack and red test lead into INPUT jack 2 Turn the rotary switch to the O position 3 Connect the test leads across the circuit to be tested 4 Read the measured resistance value on the display 16 DAWSON Note If the resistance is too high or the test leads are disconnected the display shows OL The meter may take several seconds to get a steady reading if the resistance being measured is more than 1MQ This is normal for high resistance circuits Diodes 1 Insert the black test lead into COM jack and red test lead into INPUT jack 2 Turn the rotary switch to the on
13. ore measurement and subtract the distributed capacitance of the meter from the actual measurement For measurements on large capacitances allow up to 30 seconds for the reading to stabilize Non Contact Voltage NCV 1 Hold the NCV button 2 Move the tip of the meter toward the object to be tested 3 If the voltage detected is greater than 90V AC rms the NCV indicator will flash and the buzzer will sound Note Even if no indication is given voltage may still be present Do not rely solely on NCV detection to determine the presence of voltage When measuring AC DC voltage the NCV indicator may flash due to induced voltage 18 DAWSON External power sources interference may trigger the NCV indicator Specifications The meter should be calibrated annually between 18 C 28 C and a relative humidity less than 75 General Specifications Manual and auto range Power overload protection Maximum voltage between circuit and ground 600V AC DC Maximum working height 2000m Display LCD Maximum display value 5999 Polarity indication automatically displays e Overload indication OL Or OL Sampling frequency 3 times sec Units displayed functions with units Auto power off 15 mins Power 1 5V AAA batteries Low battery indication display shows TI Operating temperature 18 C 28 C Storage temperature 10 C 50 C Tempera
14. reas Note The meter uses an LED for a backlight even though the backlight is set to turn off after 30 seconds use only when necessary to conserve battery life Auto Power Off lt If the meter is not used for 15 minutes the meter will turn itself off to conserve battery life To turn the meter back on after auto off press FUNC To disable auto power off hold FUNC while turning the meter on Measurement Preparation Make sure that when measuring current the current being measured does not exceed the range selected for an extended period of time This can cause overheating and damage the meter When measuring in manual range and the value to be measured is unknown start in the highest range and adjust the range as needed Make sure to turn the rotary switch to the proper position before connecting the leads to a circuit When connecting to a circuit connect the black lead COM jack first before connecting the red lead INPUT jack Remove the leads in the opposite order when finished DAWSON AC Current AN WARNING TO AVOID ELECTRICAL SHOCK AND INJURY PLEASE REMOVE TEST LEADS BEFORE MAKING CURRENT MEASUREMENTS 1 Turn the rotary switch to the current position with the correct range 2 Press the clamp trigger to open the clamp and insert the conductor to be measured 3 Read the measured current value on the display Note Measuring two or more conductors will
15. tage is above 600V 04 10 11 12 13 14 15 16 17 DAWSON In manual mode if the value to be measured is unknown start the meter in the maximum range and then adjust accordingly Remove the leads from the circuit first before switching between functions Disconnect power and discharge all capacitors before measuring resistance capacitance continuity or diodes Do not measure capacitance before the capacitors are discharged Do not operate the meter near explosive gas vapor or dust Stop using the meter if the meter or test leads appear damaged or do not function properly Do not use the meter unless the battery case is securely fastened to the back of the meter Do not expose the meter to direct sunlight heat or moisture DAWSON Components and Buttons Names of the Components 1 Current clamp 2 NCV indicator 3 Function button 4 Range button 5 Maximum Minimum button 6 Display 7 Common jack 8 Input jack 9 Frequency duty cycle button 10 Non contact voltage button 11 Data hold backlight button 12 Rotary switch 13 Clamp center 14 NCV sensor 15 Worklight 16 Test lead holder 17 Battery cover 18 Clamp trigger 19 Hook to hang meter 20 Test lead holder N Dawson ALLE A A Em MAX nd 0 Aa o o o COM I
16. ter is highly sensitive When the test leads are connected to the circuit the true reading will be shown Frequency In Current Mode A Resolution Accuracy 2999M DD 1 5 reading 5 digits 999 9Hz 0 1Hz gt 1kHz 0 001kHz Measurement range 10Hz 1kHz Input range gt 60A AC rms input current will increase as frequency increases Maximum input current 1000A AC rms Reference only Measurement range 10Hz 10kHz Input range gt 0 6V AC rms input voltage will increase as frequency increases Input impedance TOMO Maximum input voltage 600V AC rms In Hertz Mode Hz Range Resolution 9 999Hz 0 001Hz 99 99Hz 0 01Hz 999 9Hz 0 1Hz 9 999kHz 0 001kHz 0 3 reading 5 digits 99 99KHz 0 01kHz 999 9KHz 0 1KHz 9 999MHz 0 001MHz Measurement range 10Hz 10MHz Input range gt 0 2V AC rms input voltage will increase as frequency increases Inputimpedance TOMO Maximum input voltage 250V AC rms DAWSON DAWSON Duty Cycle Capacitance Range Resolution Accuracy Range Resolution 0 1 99 9 0 1 0 3 40nF 0 01nF Resistance A E S Range Resolution Accuracy E 4 0 reading 5 digits 6000 0 10 SOME ODE 6kQ 0 001kQ ADDHE COTE 0 01 kO 0 8 reading 3 digits 4000uF 1uF 0 1kQ 0 001MQ 0 1MQ Open circuit voltage 0 4V Over voltage protection 250V DC AC rms
17. ture coefficient less than 0 1 accuracy C Size 244x99x48mm Weight 410g Including batteries 19 DAWSON Technical Specifications Temperature 2345 C Relative humidity lt 75 AC Current Range Resolution Accuracy 600A eae 2 0 reading 5 digits 1000A 1A Maximum input current 1000AAC Frequency Range 40 400Hz DC Voltage Range Resolution Accuracy 600mV 0 1mV ov m 0 7 reading 3 digits 60V 0 01V 600V 0 1V 1000V 1V 2 0 reading 2 digits Input impedance TOMO Maximum input voltage 600V DC AC rms Note At small voltage ranges unsteady readings will appear before the test leads make contact with the circuit This is normal since the meter is highly sensitive When the test leads are connected to the circuit the true reading will be shown DAWSON DAWSON AC Voltage In Voltage Mode V Range Resolution Accuracy Range Resolution Accuracy 6V 0 001V 99 99Hz 0 01Hz 60V 0 01V 0 8 reading 3 digits 999 9Hz 0 1Hz 1 5 reading 5 digits 600V 0 1V 9 999kHz 0 001kHz 750V 1V 1 0 reading 4 digits gt 10kHz 0 01kHz Reference only Input impedance TOMO Maximum input voltage 600V DC AC rms Frequency Range 40 400Hz Note At small voltage ranges unsteady readings will appear before the test leads make contact with the circuit This is normal since the me

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