AM-42, AM-45, and AM-47 Multimeters Product Manual
Contents
1. z AutoCheck Lo Z DEV 833kQ 4 2kQ when Hi Z ACV 5MQ 90pF nominal displaying Auto 90pF nominal ACV AutoCheck Threshold Hi Z DCV 5MQ 90pF nominal gt NMRR gt 30dB 50Hz 60Hz ese vai nominal CMRR gt 100dB DC 50Hz 60Hz Rs 1kQ 2Range for AM 47 only DCV AutoCheck Threshold gt 1 2VDC or lt 0 6VDC nominal DAM 45 AutoCheck DCV only 2AM 47 AutoCheck DCV only 3 AM 47 Hi Z DCV only DC Voltage AM 42 RANGE 400 0mV Accuracy 1 0 2d 2 0 2d 2 5 4d 4 000V 40 00V 400 0V 600V NMRR gt 50dB 50Hz 60Hz CMRR gt 120dB DC 50Hz 60Hz Rs 1kQ Input Impedance 10 MQ 30pF nominal 1000MQ for 400 0mV range AC Voltage AM 42 RANGE 50Hz 60Hz 4 000V 40 00V 400 0V 60Hz 500Hz 4 000V 40 00V 400 0V 50Hz 500Hz 600V 3 5 5d Input Impedance 10 MQ 30pF nominal CMRR gt 60dB DC to 60Hz Rs 1kQ Accuracy 2 0 5d 3 0 5d Capacitance AM 45 amp AM 47 RANGE 100 0nF 1000nF 10 00uF T 100 0uF 9 2000uF4 Satoi Accuracy below 50nF is not specified 2 Accuracies with film capacitor or better 3 AM 45 top range Updates gt 1 minute on large values AM 47 only Updates gt 1 minute on large values 5 Specified with battery voltage above 2 8V half full battery Accuracy decreases gradually to 12 at low battery warning voltage of approx 2 4V Capacitance AM 42 RANGE 500 0nF 5 000uF 50 00uF TR 500 02. or 3 CENELEC DIRECTIVES The instrument conforms to CENELEC Low voltage directive 73 23 EEC and Electromagnetic compatibility directive 89 336 EEC 4 OPERATION Note All function operations described hereafter are via the Red test lead for positive polarity and Black test lead for Ground reference or otherwise specified 4 1 FUNCTIONS IN Auto V Q POSITION AM 47 amp AM 45 only Quick Start AM 47 amp AM 45 only AutoCheck mode is the default function in Auto V Q position Press the SELECT button momentarily to select and step through the functions AutoCheck Continuity EF ACV DCV Q Hz Cx AutoCheck AutoCheck mode AM 47 amp AM 45 only This innovative AutoCheck feature automatically selects measurement function of DCV ACV or Resistance Q based on the input via the test leads eWith no input the meter displays Auto when it is ready eWith no voltage signal but a resistance below 6MQ is present the meter displays the resistance value When below 25Q is present the meter AM 47 produces a continuity beep tone eWhen a signal above the threshold of DC 1 2V or AC 1 5V up to the rated 600V 450V for AM 45 is present the meter displays the appropriate voltage value in DC or AC whichever larger in peak magnitude e Overload Alert Feature When above rated 600V 450V for AM 45 is present the meter displays OL with a warning beep tone Disconnect the test leads from th
3. AN am PROBE AM 42 AM 45 amp AM 47 USER S MANUAL 1 PRODUCT DESCRIPTION Note Our top of the line model is used as the representative for illustration purposes Please refer to your respective model for function availability 1 LCD display 2 Rotary Selector to Select additional functions AM 47 amp AM 42 only and to turn the Power On or Off AM 42 only AM 45 does not have a physical Rotary Selector 3 Push button to Select additional functions all models and to switch the Power On or Off AM 47 amp AM 45 only AMA zaim ls 4 Input for all functions or otherwise specified Red test lead l for positive polarity and Black test lead for Ground reference 2 SAFETY Terms in this manual WARNING identifies conditions and actions that could result in serious injury or even death to the user CAUTION identifies conditions and actions that could cause damage or malfunction in the instrument This manual contains information and warnings that must be followed for operating the instrument safely and maintaining the instrument in a safe operating condition If the instrument is used in a manner not specified by the manufacturer the protection provided by the instrument may be impaired The meter is intended only for indoor use The meter is protected by double insulation per EN61010 1 IEC61010 1 CSA C22 2 No 1010 1 92 and UL61010B 1 to CAT III 300V amp CAT II 600V CAT II 450V for model AM 45 Measurement Cate
4. Performance above 3V m is not specified Overload Protection AM 42 amp AM 47 600VDC amp VAC rms AM 45 450VDC amp VAC rms Low Battery Below approx 2 4V Power Supply 3V standard button battery x 1 IEC CR2032 ANSI NEDA 5004LC Power Consumption typical AM 42 amp AM 45 2mA AM 47 6mA for Voltage functions on Auto VQ position and 2mA for other functions APO Consumption typical 2 2uA APO Timing AM 42 Idle for 30 minutes AM 45 amp AM 47 Idle for 3 minutes Dimension Weight L122mm x W65mm x H13mm Approx 100 gm Special Features AM 42 Data Hold and 30ms MAX Hold AM 45 amp AM 47 AutoCheck Automatic V amp Q Selection and EF Detection Accessories Battery installed and User s manual Electrical Specification Accuracy is given as of reading digits number of digits or otherwise specified 23 C 5 C and less than 75 R H DC Voltage AM 45 amp AM 47 AC Voltage AM 45 amp AM 47 RANGE Accuracy RANGE Accuracy 6 000V 0 5 3d 50Hz 60Hz 60 00V 1 0 5d 6 000V 60 00V 450 0V 1 1 5 5d 450 0V 1 2 5d 600 0V 2 600 0V 2 2 0 5d CMRR gt 60dB DC to 60Hz Rs 1kQ 600 0V 3 1 5 5d AM 45 Input Impedance AutoCheck Lo Z ACV 160kQ 160pF nominal AM 45 Input Impedance AutoCheck Lo Z DCV 160k 160pF nominal AM 47 Input Impedance AM 47 Input Impedance AutoCheckTM Lo Z ACV 833kQ 4 2kQ when displaying Auto 90pF nominal
5. 48mA for AM 47 DC uA Current AM 47 only Non Contact EF Detection AM 45 amp AM 47 RANGE Accuracy Burden Voltage 400 0uA 1 5 3d 6mV uA Typical Voltage Bar Graph Indication 15V to 55V 30V to 85V 2000uA 1 2 3d 6mV uA 55V to 145V AC uA Current AM 47 only 85V to 190V RANGE Accuracy Burden Voltage above 120V Indication Bar graph segments amp audible beep tones 400 0uA 2 0 3d 6mV uA proportional to the field strength 2000uA 1 5 3d 6mV uA Detection Frequency 50 60Hz Detection Antenna Top left corner of the meter Audible Continuity Tester Probe Contact EF Detection For more precise Open Circuit Voltage 0 4VDC typical indication of live wires use the Red probe for Audible Threshold direct contact measurements AM 45 amp AM 47 between 50Q and 300Q AM 42 between 10Q and 120Q LIMITED WARRANTY Congratulations Your new instrument has been quality crafted according to quality standards and contains quality components and workmanship It has been inspected for proper operation of all of its functions and tested by qualified factory technicians according to the long established standards of our company Your instrument has a limited warranty against defective materials and or workmanship for one year from the date of purchase provided that in the opinion of the factory the instrument has not been tampered with or taken apart Should your instrument fail due to defec
6. AM 45 use micro controller like a computer to run the meter system WHEN THE METER IS POWER ON intermittence battery power failure fast intermittence battery contact interval in the order of millisecond may cause the meter reset re startup abnormally Simply press and hold the SELECT button for approximately 6 seconds to master reset the system if such a situation occurs 6 SPECIFICATION GENERAL SPECIFICATIONS Display amp Update Rate AM 42 3 3 4 digits 4000 counts Updates 3 per second nominal AM 45 amp AM 47 3 5 6 digits 6000 counts Updates 5 per second nominal Operating Temperature 0 C 40 C Relative Humidity Maximum relative humidity 80 for temperature up to 31 C decreasing linearly to 50 relative humidity at 40 C Altitude Operating below 2000m Storage Temperature 40 C 60 C lt 80 R H with battery removed Temperature Coefficient Nominal 0 15 x specified accuracy C 0 C 18 C or 28 C 40 C or otherwise specified Sensing Average sensing Pollution Degree 2 Safety Meets IEC61010 1 CAN CSA C22 2 No 1010 1 92 Transient Protection 4kV lightning surge 1 2 50us Measurement Category AM 42 amp AM 47 CAT II 600V and CAT III 300V AM 45 CAT II 450V and CAT III 300V E M C Meets EN61326 1997 1998 A1 EN61000 4 4 1995 amp EN61000 4 3 1996 In an RF Field of 3V m Capacitance function is not specified Other function ranges Total accuracy Specified accuracy 45d
7. fails to operate check battery leads etc and replace as necessary Double check operating procedure as described in this user s manual If the instrument voltage resistance input has subjected to high voltage transient mostly caused by lightning or switching surge to your system by accident or abnormal conditions of operation the series fusible resistors will be blown off become high impedance like fuses to protect the user and the instrument Most measuring functions through this input will then be open circuit The series fusible resistors and the spark gaps should then be replaced by qualified technician Refer to the LIMITED WARRANTY section for obtaining warranty or repairing service Battery replacement If the meter starts up with persistent resetting display or with low battery icon EJ turns on replace the battery ASAP The meter uses one 3V coin battery IEC CR2032 Before opening the case bottom make sure the meter is switched off to avoid abrupt power reset to a running meter system Disconnect test leads from live circuits Loosen the screw from the case bottom Lift the end of the case bottom nearest the input test leads until it unsnaps from the case top Replace the battery Observe battery polarities with positive faces up towards the case bottom Replace the case bottom and ensure that the snap on the case top near the LCD side is engaged Re fasten the screw Note for AM 47 and AM 45 battery replacement AM 47 and
8. CT button momentarily selects Continuity function The Audible annunciator turns on Continuity is convenient for checking wiring connections and operation of switches A continuous beep tone indicates a complete circuit Press SELECT button momentarily AGAIN selects Diode test function The annunciator F turns on The reading shows the approximate voltage drop across the test leads Normal forward voltage drop forward biased for a good silicon diode is between 0 400V to 0 900V A reading higher than that indicates a leaky diode defective A zero reading indicates a shorted diode defective An OL indicates an open diode defective Reverse the test leads connections reverse biased across the diode The digital display shows OL if the diode is good Any other readings indicate the diode is resistive or shorted defective Press SELECT button momentarily AGAIN selects Capacitance function Frequency function AM 42 only Rotate the rotary selector to the Hz position selects Frequency function Unlike the Line Level Hz Frequency function for AM 47 only as stated this Common Hz Frequency function is set only at the highest input sensitivity mainly for measuring small electronic signals of below 20VAC rms 4 3 OTHER FEATURES Power On amp Off For models AM 47 and AM 45 press and hold the SELECT button for 1 second and then release to turn the power ON or OFF Press and hold the SELECT button for approximately 6 secon
9. cates a leaky diode defective A zero reading indicates a shorted diode defective and the meter will give a long beep as continuity warning An OL indicates an open diode defective Reverse the test leads connections reverse biased across the diode The digital display shows OL if the diode is good Any other readings indicate the diode is resistive or shorted defective Press SELECT button momentarily selects the lowest 600Q range for lower resistance measurements It is an extended range to complement the AutoCheck Resistance Q function DC uA amp AC uA Micro Amp functions AM 47 only Rotate the rotary selector to the uA position The display reading unit is in uA although there is no unit annunciator on the display DC uA is the default function There is no annunciator for DC Press SELECT button momentarily to select AC uA The AC annunciator Y turns on These ranges like other functions are protected up to the maximum rated voltages of the meter 4 DCV amp ACV functions AM 42 only Rotate the rotary selector to the V position selects common impedance Hi Z voltage measurements DCV is the default function The DC annunciator turns on Press SELECT button momentarily to select ACV The AC annunciator Y turns on Resistance Continuity Diode amp Capacitance functions AM 42 only Rotate the rotary selector to the Q BF 4 position Resistance Q is the default function Press SELE
10. ds to master reset the system to the default stage if in case the meter hangs up unexpectedly For model AM 42 rotate the rotary selector to turn the power ON or OFF Auto Power Off Models AM 47 and AM 45 turn off after approximately 3 minutes of idle measurement readings and no button switch activities Model AM 42 turns off automatically after approximately 30 minutes of no button switch activities HOLD and 30ms MAXU features AM 42 only The Hold feature freezes the display for later viewing Press the HOLD MAX button momentarily to activate or to exit the Hold feature The Max feature captures voltage signals that have durations as short as 30ms milliseconds within a single range and has automatic up range capability This mode is available in DCV amp ACV functions Press the HOLD W MAX button for 1 second or more to activate or to exit the Max feature Auto ranging If the function selected has more than one range the meters will auto range to the best range and resolution No manual ranging is required 5 MAINTENANCE WARNING To avoid electrical shock disconnect test leads from live circuits before opening the case Do not operate with open case 5 Cleaning and Storage Periodically wipe the case with a damp cloth and mild detergent do not use abrasives or solvents If the meter is not to be used for periods of longer than 60 days remove the battery and store it separately Trouble Shooting If the instrument
11. e signal immediately to avoid hazards Note Range Lock Feature When a measurement reading is being displayed in AutoCheck mode press the SELECT button momentarily 1 time can lock the function range it was in The LCD annunciator PEKA turns off Range lock can speed up repetitive measurements Press the SELECT button momentarily again to return to AutoCheck mode Hazardous Alert When making resistance measurements in AutoCheck mode an unexpected display of voltage readings alerts you that the part under test is still energized AutoCheck nominal input impedances are slightly lower than that of common digital multimeters They are in fact more similar to that of most traditional analog multimeters Loz will display on the LCD to remind the users in such cases Although not likely if such impedance might damage your circuits use the common impedance Hi Z voltage mode AM 47 and AM 42 only for making voltage measurements on them Continuity Audible With Symbolic Display AM 47 amp AM 45 only From AutoCheck with Auto being displayed press the SELECT button momentarily 1 time to select Continuity function The meter displays a symbolic open switch display i a when itis ready Continuity is convenient for checking wiring connections and operation of switches A continuous beep tone with a symbolic closed switch display indicates a complete circuit In noisy environments it is helpful to
12. gory Ill CAT III is for measurements performed in a building installation Examples are measurements on distribution boards circuit breakers wiring including cables bus bars junction boxes switches socket outlets in the fixed installation and equipment for industrial use and some other equipment for example stationary motors with permanent connection to the fixed installation Measurement Category II CAT Il is for measurements performed on circuits directly connected to the low voltage installation Examples are measurements on household appliances portable tools and similar equipment WARNING To reduce the risk of fire or electric shock do not expose this product to rain or moisture To avoid electrical shock hazard observe the proper safety precautions when working with voltages above 60 VDC or 30 VAC rms These voltage levels pose a potential shock hazard to the user Do not touch test lead tips or the circuit being tested while power is applied to the circuit being measured Keep your fingers behind the finger guards of the test leads during measurement Inspect test leads and probes for damaged insulation or exposed metal before using the instrument If any defects are found replace them immediately INTERNATIONAL ELECTRICAL SYMBOLS Caution Refer to the explanation in this Manual Caution Risk of electric shock Earth Ground Double Insulation or Reinforced insulation Fuse AC Alternating Current DC Direct Current
13. nly as stated this Common Hz Frequency function is set only at the highest input sensitivity mainly for measuring small electronic signals of below 20VAC rms 4 4 OTHER FUNCTIONS DCV ACV amp Line Level Hz functions AM 47 only Rotate the rotary selector to the V position selects common impedance Hi Z voltage measurements DCV is the default function Press SELECT button momentarily to select ACV The AC annunciator Y turns on Press momentarily again to activate the Line Level Hz function Note Line Level Hz input sensitivity varies automatically with ACV range selected when Line Level Hz is selected AC 6V range has the highest and AC 600V range has the lowest sensitivity Measuring the signal in ACV function WHILE selecting Line Level Hz function in that ACV range automatically sets the most appropriate sensitivity for higher voltage applications This can avoid electrical noises as in 110 220V line voltage applications for example If the reading shows zero due to insufficient signal levels select Line Level Hz function BEFORE making measurements at AC 6V range will set the highest sensitivity Diode amp 600Q functions AM 47 only Rotate the rotary selector to the F 1 600Q position Diode test is the default function The reading shows the approximate voltage drop across the test leads Normal forward voltage drop forward biased for a good silicon diode is between 0 400V to 0 900V A reading higher than that indi
14. see continuity measurements 3 Electric Field EF Detection AM 47 amp AM 45 only From AutoCheck with Auto being displayed press the SELECT button momentarily 2 times to select EF Detection feature The meter displays EF when it is ready Signal strength is indicated as a series of bar graph segments on the display and variable beep tones e Non Contact EF Detection An antenna is located at the top left corner of the meter which detects electric field surrounds current carrying conductors It is ideal for tracing live wiring connections locating wiring breakage and to distinguish between live or earth connections eProbe Contact EF Detection For more precise indication of live wires such as distinguishing between live and ground sockets use the Red test probe for direct contact measurements V and Q of AutoCheck In Manual Selection AM 47 amp AM 45 only From AutoCheck with Auto being displayed press the SELECT button momentarily 3 times to select ACV 4 times to select DCV and 5 times to select Resistance Q functions of AutoCheck Such selected function remains auto ranging Frequency And Capacitance AM 47 amp AM 45 only From AutoCheck with Auto being displayed press the SELECT button momentarily 6 times to select Frequency Hz 7 times to select Capacitance F functions and 8 times to return to AutoCheck mode Note Unlike the Line Level Hz Frequency function for AM 47 o
15. tive materials and or workmanship during this one year period a no charge repair or replacement will be made to the original purchaser Please have your dated bill of sale which must identify the instrument model number and serial number and call the number listed below Repair Department ATP Amprobe TIF Promax Miramar FL Phone 954 499 5400 Toll Free 800 327 5060 Fax 954 499 5454 Website www amprobe com Please obtain an RMA number before returning product for repair Outside the U S A the local representative will assist you Above limited warranty covers repair and replacement of instrument only and no other obligation is stated or implied P N 7M1C 0661 0000
16. uF 3000uF 3 3 5 6d Additional 50 00nF range accuracy is not specified 2 Accuracies with film capacitor or better 3 Updates gt 1 minute on large values Specified with battery voltage above 2 8V half full battery Accuracy decreases gradually to 12 at low battery warning voltage of approx 2 4V T Ohms AM 45 amp AM 47 600 00 2 0 6d2 Open Circuit Voltage 0 4VDC typical AutoCheck is for 6 000kQ 6 000MQ ranges 600 0Q is an independent range for AM 47 only 2 Add 40d to specified accuracy while reading is below 20 of range Ohms AM 42 400 0Q 4 000KQ 40 00KQ 400 0KQ 4 000MQ2 1 5 4d 40 00MQ 2 5 4d Open Circuit Voltage 0 4VDC typical Hz Frequency AM 45 1 amp AM 47 12 RANGE _ Accuracy Specified at 30 00KH2 nant 30 00kHz 0 5 4d lt 20V Sine rms Sensitivity Sine rms Hz in Auto VQ position gt 3V 2 Line level Hz in V position AM 47 only 6 000VAC range gt 3V 60 00VAC range gt 6V 600 0VAC range gt 60V Hz Frequency AM 42 RANGE Accuracy 5 000Hz 1 000MHz 0 5 4d Specified at Input Voltage lt 20VAC rms Input Signal Sine wave or Square wave with duty lt 600V Sine rms cycle gt 40 amp lt 70 Sensitivity V peak 5Hz 100kHz gt 1 3Vp 100kHz 500kHz gt 2 2Vp 500kHz 1MHz gt 4 2Vp Diode Tester AM 42 amp AM 47 only Test Current Typical Open Circuit Voltage lt 1 6VDC 0 25mA for AM 42 0
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