Instruction Manual IDM 71/72/73 Digital Multimeter
Contents
1. Level Over Voltage Category Level defines at which circuit level masure ments may be safely made Different category circuits have different high voltage transients PER IEC 1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measurements are taken to limit the transient overvoltage to an appropriate low level Note examples include protected electronic circuits OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY II is energy consuming equipment to be supplied from a fixed installation OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is equipment in fixed installa tions Note examples include switches in a fixed installation and some equipment for industrial use with permanent connection to the fixed installation OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATRGORY IV is for use at the origin of the installations Note examples include electricity meters and primary over current protection equipment PER IEC1010 Pollution degree POLLUTION Addition of foreign matter solid liquid or gaseous ionized gases that may produce a reduction of dielectric strength or surface resistively POLLUTION degree For the purpose of evaluating spacing of this product the following degrees of POLLUTION in the microenvironment are defined Safety Compliance And Certification POLLUTION DEGREE 1 No POLLUTION or o2. be used Introduction Introduction Unpacking and Inspection Upon removing your new Digital Multimeter from its packing you should have the following items 1 2 3 4 Digital Multimeter Test lead set one black on red User Manual Protective holster Environmental Conditions This product is safe at least under the following conditions 1 2 3 Indoor Use Altitude up to 2000 Meter Operating Temperature and Relative Humidity Non condensing lt 10 C 11 C 30 C lt 80 R H 31 C 40 C lt 75 R H 41 C 50 C lt 45 R H Storage Temperature and Relative Humidity 20 C 60 C 0 80 R H when battery removed from Meter Pollution degree 2 Installation category The standard 70 series models meet the requirements for double insulation to IEC 61010 2001 EN61010 2001 UL3111 1 6 1994 CSA C22 2 NO 1010 1 92 to terminals VIQIUA IDM 71 72 and 73 Cat IV 600 Volts A IDM 72 and 73 only Cat IV 600 Volts Shock Vibration Sinusoidal vibration per Mil T 28800E 5 55 Hz 3g maximum Drop Protection 4 feet drop to hardwood on concrete floor Introduction The Meter Description Front Panel Illustration 1 6000 count LCD display 2 Push buttons for features 3 Rotary switch to turn the power on or off and to select a function 4 Input terminal for A current function 5 Input terminal for all functions EXCEPT current A functions 6 Common Gro
3. effect of the meter is expressed as following 100 x 20010 9 L Es gt Zeircuit Zcircuit 0 01 Q Eburden gt or E ure 100 x poe Sagem AMMETER SHUNT Es The DC pA input terminal is protected by a 1 5K PTC 600V rating thermistor 11 Making Basic Measurements Measuring Capacitance A Caution To avoid possible damage to the meter or to the equipment under test disconnect circuit power and discharge all high voltage capacitors before measuring capacitance Use the DC voltage function to confirm that the capacitor is discharged Note To improve the measurement accuracy of small value capacitor record the reading with the test leads open then substract the residual capacitance of the meter and leads from measurement CUNKNOWN C MEASUREMENT C RESIDUAL Making Basic Measurements Testing Diodes and Continuity Diode A Caution For in circuit test turn circuit power off and discharge all high voltage capacitors through an appropriate resistance load Note Use the diode test to check if the semiconductor junction is good or bad The meter sends a current through the semiconductor junction to measure the voltage drop across the junction A good junction drops between 0 4 V to 0 9 V 13 Features Features Feature Description The meter has the following features Display Hold Freezes the display Min Ma
4. or transistor junction to conduct so it is better to disconnect the resistance from the circuit to get a correct measurement The resistance of test leads is about 0 1Q 0 20 To test the leads resistance touch the probe tips together For accurate measurement in low resistance Runenown RMEASUREMENT Rrest LEAD Measuring DC uA DC A AC A Current 920 Disconnect ht HA i i j 5929 OOOO i ee ee AS tte Ay TIA amp MA Not IDM 71 A A Warning Never attempt an in circuit measurement where the open circuit potential to earth potential is greater than 500V for example a 3 phase system measurement you may damage the meter or be injured Making Basic Measurements A Caution To avoid possible damage to the meter or to the equipment under test check the meter s fuses before measuring current Use the proper terminals function and range for your measurement Never place the probes across in parallel with any circuit or component when the leads are plugged into the current terminals When measuring current the meter acts like an impedance such as 0 01 at AC DC A approximately 1 5K Q at DC pA in series with the circuit This loading effect of the meter can cause measurement errors loading effect error especially in low impedance circuits For example To measure a 19 impedance circuit will cause a 1 measuring error The error percentage of the loading
5. 0 counts updates 1 5 sec Polarity Indication Automatic positive implied negative indicated Overrange Indication OL or OL Low Battery Indication cs is displayed when the battery voltage drops below operating voltage Auto Power Off Approx 10 minutes Operating Ambient Non condensing lt 10 C 11 C 30 C lt 80 R H 31 C 40 C lt 75 R H 41 C 50 lt 45 R H Storage Temperature 20 C to 60 C 0 to 80 R H when battery removed from Meter Temperature Coefficient 0 15 x Spec Acc y lt 18 C or gt 28 C Power Requirements Alkaline 1 5V LRO3 x 2 batteries for 71 Alkaline 9V battery 6LR61 for 72 73 Battery Life Alkaline 300 hours approximately Dimensions W x H x D 76mm x 158mm x 38mm without holster 82mm x 164mm x 44mm with holster Accessories Battery installed Test leads and User manual Electrical Specifications Accuracy is 6 reading number of digits at 23 C 5 C less than 80 R H 1 DC AC Volts DC Accuracy AC Accuracy 600 0mV 6 000V 50Hz 60Hz sinewave only for 600 0mV range 60 00V 0 5 2dgt 0 9 5dgt ROGO 50Hz 500Hz 4 DC1000V AC750V Over voltage protection DC1000 V or AC 750 Vrms Input Impedance 10MO less than 100pF 20 Specification CMRR NMRR Common Mode Rejection Ratio Normal Mode Rejection Ratio Vac CMRR gt 60dB at DC 50Hz 60Hz Voc CMRR gt 100cB at DC 50Hz
6. 60Hz NMRR gt 50cB at DC 50Hz 60Hz AC Conversion Type 71 Average sensing rms indication 72173 AC conversions are ac coupled true rms responding calibrated to the sine wave input The basic accuracy is specified for a sine wave below 4000 counts Over 4000 counts add 0 6 to the accuracy For a non sine wave the crest factor of the waveform is specified at lt 3 at full scale up to 2000 counts decreasing linearly to a crest factor lt 1 5 at 1000 counts Add 1 5 for a non sinusoidal waveform Crest Factor C F is the ratio of Peak value to RMS value 2 DC AC Current sexan exa OE 600 0HA N A lt 4mV pA 6000A 1 0 2 dgt 2V max 6 000A 2 1 5 5 dgt 50Hz 500Hz 10 00A 2 4 Overload Protection A input 10A 600V high energy fuse Not IDM 71 HA input 600V rms 4 AC Conversion Type Conversion type and additional specification are same as DC AC Voltage 2 Not IDM 71 21 Specification 3 Resistance Overload 600 0Q 2 6 000KQ 0 7 2 dgt 60 00KQ 600V rms 600 0KQ 6 000MQ 1 0 2 dgt 60 00MQ 1 1 5 2 dgt Open circuit Voltage 1 3V approx 1 lt 100 dat rolling 2 lt 10 dgt rolling 4 Diode Check and Continuity For 0 4V 0 8V Max Test Current 1 5mA Max Open Circuit Voltage 3V Overload Protection 600V rms Continuity Built in buzzer sounds when resistance is less than approximately 1009 Response time is approx
7. ISO Instruction Manual IDM 71 72 73 Digital Multimeter T RMS RS232 GB d O ar nar af When ISO TECH 1DM73 MINMAX RS 232 RANGE HOLD Z N v J7 xo WA R yr ap HA Je an Hz Vv A OFF Jf JI gt NO 7 8 Ye lt 4 Es N NN MAX 10A _Jleovoarw J FUSED 1000V CATIN Safety Alert Symbol A NS A canton READ and UNDERSTAND all UA safety alert symbols A in this manual Failure to read and understand safety instructions can result in INJURY or DEATH Limited Warranty This meter is warranted to the original purchaser against defects in material and workmanship for 3 years from the date of purchase During this warranty period RS Components will at its option replace or repair the defective unit subject to verification of the defect or malfunction This warranty does not cover fuses disposable batteries or damage from abuse neglect accident unauthorized repair alteration contamination or abnormal conditions of operation or handling Any implied warranties arising out of the sale of this product including but not limited to implied warranties of merchantability and fitness for a particular purpose are limited to the above RS Components shall not be liable for loss of use of the instrument or other incidental or consequential damages expenses or economic loss or for any claim or claims for such damage expense
8. If the meter is not to be used for a long period more than 60 days remove the battery and store it separately Fuse Replacement Not IDM 71 Refer to the following figure to replace fuse QSNNNQassssnnnnnn nnn p A Caution VPAPAPPAS PPA LP LLL L ALLA LALLA NNNNA e Use ONLY a fuse with the amperage interrupt voltage and speed rating specified e Fuse rating 10A 600V high energy fuse 10x38 mm Fast Acting Ferraz G330010 RS 188 7971 or equvilent Trouble Shooting Battery Replacement Refer to the following figure to replace the battery t ya 3 z 2 e B A Caution t 3 i Peer PRANAN e Replace the battery as soon as the _ O low battery indicator es appears to avoid false reading e 71 Battery 1 5V x 2 72 73 Battery 9V Trouble Shooting Do not attempt to repair your meter unless you are qualified to do so and have the relevant calibration performance test and service information Basic Trouble Shooting If the meter fails first check the battery the battery connection fuse test leads and replace as necessary Review this manual to make sure that you are operating the meter correctly Testing the Fuse and Test Leads Test the fuse and test leads as shown below Testing the Fuse Not IDM 71 Testing the Test Leads lt 0 5 n OK A oL x O 19 Specification Specification General Specifications Display 600
9. imately 100 msec 22 Specification 5 Frequency 6000Hz 100mV rms 60 00KHz Frequency 600 0KHz 0 1 1 digit 6 000MHz 250mV rms Overload Protection 600V rms Sensitivity level tested by a square wave form Less than 20Hz the sensitivity is 1 5V rms Max Sensitivity lt 5 Vac rms 6 Capacitance ea 1 9 8 dgt 600Vrms 600 0jF lt 100 dgt of reading rolling 7 Auto Power Off APO If the meter idles for more than 10 minutes the meter automatically turns the power off 23 Asia Iso Tech 460 Alexandra Road 15 01A PSA Building Singapore 119963 USA 7410 Pebble Drive Fort Worth Texas 76118 6961 Europe Iso Tech PO Box 99 Corby Northamptonshire NN17 9RS United Kingdom Canada 1701 Woodward Drive Ste 108 Ottawa Ontario K2C 0R4 Canada Japan West Tower 12th Floor Yokohama Business Park 134 Godocho Hodogaya Yokohama Kanagawa 240 0005 Japan South America Av Pdte Eduardo Frei M 6001 71 Centro Empresas El Cortijo Conchali Santiago Chile
10. ke the meter stop updating the maximum and minimum value When display Hold mode is nested in MIN MAX mode the MIN MAX mode must be released before the display Hold 15 Using The Features RS232 IDM 73 only Press mi O qu Press Press mi qu Press Note Press the Hold button to toggle in and out of the display Hold mode The MAX MIN feature is unavailable when display Hold is active Backlight YA es Press m lt i Press Note Press the Backlight Button to toggle the display backlight on and off Using The Features Auto Power Off Battery Saver up Note If the meter idles for more than 10 minutes the meter automatically turns the power off When this happens the LCD displaying state of the meter is saved The meter can be turned back on by pushing any button the LCD displays the saved state Pushing Hold button to disables the hold state Any button press or rotary switch change resets the time of Auto Power OFF Disable Auto Power Off 17 Maintenance Maintenance A Caution e Do not attempt to repair this meter It contains no userserviceable parts Repair or servicing should only be performed by qualified personal e Failure to observe this precaution can result in injury and can damage the meter Cleaning and storage Periodically wipe the housing with a damp cloth and mild detergent Dirt or moisture in the terminals can affect readings
11. ment A Warning Alert Symbol A A Warning Statement identifies hazardous conditions and actions that could cause BODILY HARM or DEATH A Caution Alert Symbol A ACaution Statement identifies conditions and actions that could DAMAGE the meter or the equipment under test A Warnings and A Cautions A A Warnings e When using test leads or probes keep your fingers behind the finger guards Remove test lead from meter before opening the battery door or meter case Use the meter only as specified in this manual or the protection by the meter might be impaired Always use proper terminals switch position and range for measurements Never attempt a voltage measurement with the test Lead inserted into the A input terminal Verify the meter s operation by measuring a known voltage If in doubt have the Meter serviced Do not apply more than the rated voltage as marked on meter between terminals or between any terminal and earth ground Do not attempt a current measurement when the open circuit voltage is above the fuse protection rating Check the open circuit voltage with the voltage function Only replace a blown fuse with one of the proper rating as specified in this manual e Use caution with voltages above 30 Vac rms 42 Vac peak or 60 Vdc These voltages pose a shock hazard Safety To avoid false readings that can lead to electric shock and injury replace battery as soon as lo
12. nly dry non conductive POLLUTION occurs The POLLUTION has no influence POLLUTION DEGREE 2 Normal POLLUTION only non conductive POLLUTION occurs Occasionally however a temporary conductivity caused by condensation must be expected POLLUTION DEGREE 3 Conductive POLLUTION occurs or dry non conductive POLLUTION occurs which becomes conductive due to condensation which is expected NOTE In such conditions equipment is normally protected against exposure to direct sunlight precipitation and full wind pressure but neither temperature nor humidity is controlled Safety Compliance And Certification Safety compliance The meter conforms to CENELEC LVD Low Voltage directive 73 23 EEC and EMC Electromagnetic Compatibility directive 89 336 EEC The meter meet the requirements of IEC 61010 1 2001 EN 61010 1 2001 UL 3111 1 Jan 1994 CSA C22 2 NO 1010 1 92 A2 Feb 1997 Safety Certification C TEST EQUIPMENT RISK ASSESSMENT Users of this equipment and or their employers are reminded that Health and Safety Legislation require them to carry out a valid risk assessments of all electrical work so as to identify potential sources of electrical danger and risk of electrical injury such as from inadvertent short circuits Where the assessments show that the risk is significant the use of fused test leads constructed in accordance with the HSE guidance note GS38 Electrical Test Equipment for use by Electricians should
13. or economic loss Some states or countries laws vary so the above limitations or exclusions may not apply to you For full terms and conditions refer to the current RS Catalogue Table of Contents Title Page SAFETY 3 A Warning and A Caution Alert Symbol Statements 3 Warning and Cautions 3 Symbols as Marked on The Meter 4 Symbols and Terms in The Manual 5 Safety Compliance And Certification 6 Safety Compliance 6 Safety Certification 6 Introduction 7 Unpacking and Inspection 7 Environmental Conditions 7 Meter Description 8 Making Basic Measurements 8 Preparation and Caution Before Measurement 8 Measuring AC DC Voltage and Frequency 9 Measuring Resistance 9 Measuring DC pA and AC DC A Current 10 Measuring Capacitance 12 Testing Diodes and Continuity 13 Features 14 Features Description 14 Features Available vs Functions 14 Using The Features 15 Manual Ranging and Auto Ranging 15 Min Max Recording Mode 15 RS 232 16 Display Hold 16 Backlight 16 Auto Power Off Battery Saver 17 Disable Auto Power Off 17 Maintenance 18 Cleaning and Storage 18 Fuse Replacement 18 Battery Replacement 19 Trouble Shooting 19 Basic Trouble Shooting 19 Testing the Fuse and Test Leads 19 Specification 20 General Specification 20 Electrical Specification 20 Safety Safety A Warning and 4 Caution Alert Symbol State
14. und reference input terminal for all functions Display O Features Functions amp Power On Off A Input Not IDM 71 O EH VOA gt Input COMMON Input Making Basic Measurements Preparation and Caution Before Measurement A Observe the rules of A Warnings and A Cautions When connecting the test leads to the DUT Device Under Test connect the common COM test lead before connecting the live lead when removing the test leads remove the test live lead before removing the common test lead The figures on the following pages show how to make basic measurements Making Basic Measurements Measuring AC DC Voltage And Frequency The non zero display reading is normal when the meter test leads are open but this will not affect actural measurement accuracy The meter will show zero or close to zero when the test leads are shorted In reading AC voltage or current reading settling time increases to several seconds at the low end of AC voltage and current ranges in rms models Measuring Resistance O Disconnect Circuit Power Off Making Basic Measurements A Caution To avoid possible damage to the meter or to the equip ment under test disconnect circuit power and discharge all high voltage capacitors before measuring resistance Note The meter provides an open voltage lt 1 5V to the circuit under test that causes the diode
15. w battery indicator appears Disconnect circuit power and discharge all high voltage capacitors before testing resistance continuity diodes or capacitance Do not use the meter around explosive gas or vapor To reduce the risk of fire or electric shock do not expose this product to rain or moisture A Cautions Disconnect the test leads from the test points before changing the position of the function rotary switch Never connect a source of voltage with the function rotary switch in 0 8 5 A Hz position Do not expose Meter to extremes of temperature or high humidity Never set the meter in A function to measure the voltage of a power supply circuit in equipment as it could result in damage the meter and the equipment under test Symbols as Marked on The Meter AC Alternating Current DC Direct Current le Caution Risk of Electric shock To alert you to the presence of a potentially hazardous voltage Caution Risk of Danger Refer to Warnings and A Cautions in the manual o gt gt Double Insulation protection against electric shock A M Conforms to European Union directives Safety Symbols and Terms in The Manual Symbols A Caution Risk of Danger A Warning Identifies hazardous conditions and actions that could cause BODILY HARM or DEATH A Caution Identifies conditions and actions that could DAMAGE the meter or equipment under test E Fuse Terms CAT
16. x Hold Record the Max or Min reading of the display Range Selects the manual ranging mode The default mode is Automatic Range RS232 An optical isolated interface output for data communication Backlight lt LCD display backlight APO Auto Power Off Battery Saver The meter automatically enters Sleep Mode and blanks the display if the meter is not used for 10 minutes Press any of the feature buttons or change the rotary switch position to reset the time of APO When the RS232 output is active the APO is disabled Features Available vs Functions nV ab Hz NA HOLD ES po fo lo mwasho o o Jo jo jo Jo o o 0 V Q A BackueHt 0 o o o 0 o o 0 0 Using The Features Using The Features Manual Ranging and Auto Ranging 2503 2587 259 O Press 11 gt Press I gt Press nii Press gt 1sec IIE Press gt 1sec IIIN Press gt 1sec IIE Note The Range button is pressed to select manual ranging and to change ranges When the Range button is pressed once the AUTO indicator turns off Press the Range button to select the appropriate range for the measurement you want to make Press the Range button and hold for 1 second to return to Autorange mode MIN MAX Record Press mib Press mi gt un Press Press gt 1sec III Press gt 1sec mia Note Press the HOLD button in MIN MAX mode to ma
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