Multimeter metex 3640
Contents
1. FAX 815 433 5104 1 INTRODUCTION The new concept M 3600D Series Multimeters have Dual Display and Communication function with computer by RS 232C as basic The meter is a handheld 1999 count instrument with True Rms dB range temperature measurement for some models M 3640D M 3660D and frequency measurement up to 20MHz M 3650D M 3660D Please read these operating instructions very carefully before commencing your measurement Power Button Function Button Set Reset Button DC AC Button Up Button Down Button Transistor Socket Capacitance Temp Socket Rotary Switch 10 20A Terminal 11 mA Terminal 12 COM Terminal 13 V O Terminal 14 LCD 31 2 digit Max 1999 15 Analog Bargraph 16 Bargraph Scale WMNOMAwWNH 17 Overload Indication 18 Auto Hold 19 Data Hold 18 19 20 21 22 28 20 Minimum 29 21 Maximum 22 Relative 23 24 25 B n 23 Memory 30 31 M ni er e 24 Memory Recall 33 oe 25 Dual Display TER M 26 Communication 35 CAP 0 5 1 27 Comparison hFE 49 22 1 Me 37 LOGI bunnan 28 Address Number E 29 Diode Test 36 30 Alternating Current or Voltage r 31 Continuity Test rk 17 32 Negative Polarity Lt LR 33 Frequency 34 Temperature 35 Capacitance 36 Transistor hFE 37 Logic Test 38 Decibel 39 Sub display 40 Low battery indication 41 Annunciators Manual Documentation Number M3640D12. PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 MODEL FUNCTION RANGE ACCURACY RESOLUTION M 3640D 2 mA 0 5 of rdg 1 dgt 0 1 uA M 3660D 1 uA DC CURRENT 10 uA 200 mA 1 2 of rdg 1 dgt 100 uA 20 A 2 0 of rdg 5 dgts 100 mA 2 mA 1 0 of rdg 3 dgts 0 1 uA l uA AC CURRENT 10 uA 200 mA 1 8 of rdg 5 dgts 100 uA 20 A 3 0 of rdg 5 dgts 10 mA 40 C 200 C 3 0 of rdg 5 dgts 1 C TEMPOR HIS 200 C 1200 C 3 0 of rdg 2 dgts dB 200 mV 3 0 of rdg 5 dgts 0 1 dB 20V Notes AC Current Frequency for accuracy e 40 Hz to 10 KHz for 2 mA amp 200 mA ranges e 40 Hz to 1 KHz for 20A range Manual Documentation Number M3640D 1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 37 MODEL FUNCTION RANGE ACCURACY RESOLUTION M 3640D 2 KHz 1 0 of rdg 1 dgt 1Hz M 3660D 20 KHz 10 Hz 200 KHz 100 Hz FREQUENCY 1 MHz 1 0 of rdg 1 dgt 1 KHz 2 MHz 1 0 of rdg 1 dgt 1 KHz 20 MHz 10 KHz LOW 2nF 2 0 of rdg 10 dgts 1 pF 20nF 2 0 of rdg 3 dgts 10 pF 200 nF 100 pF CAPACITANCE HIGH 2 uF 3 0 of rdg 10 dgts_ 1 nF 20uF 3 0 of rdg 5 dgts 10 nF 200 uF 4 0 of rdg 5 dgts 100 nF DIODE Measures forward resistance of a semiconductor junction in KQ a test current of 1 mA Note FREQUENCY Not available in M 3640D 38 M
3. Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 17 OL Overload Indication OL is displayed with flashing the bar graph when input is too excess to display GL 5i Li o 5 0 15 20 bunibiodnnbintunieniuntiul 18 Auto Hold The meter will freeze a reading automatically recorded 4 seconds ago when last reading is completed 19 Data Hold In this mode you can freeze a reading on the sub display by pressing the SET RESET button and the subsequent reading will be displayed on the main display 20 MIND Minimum Lets you keep a minimum reading on the sub display while showing the present readings on the main display 21 Maximum Lets you keep a maximum reading on the sub display while showing the present readings on the main display 22 Relative Enables you to compare the reference value with a subsequent reading To set the reference value follow these steps 1 Set the function mode at mode 2 Store the polarity values of the reference value you desire by pressing the UP DOWN buttons and SET RESET button by turns 3 Press SET RESET button for final setting Manual Documentation Number M3640D 1598 11 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Example Store Polarity with UP DOWN gt SET RESET gt Store 1st Value gt SET RESET gt Store 2nd Value SET RESET Store 3rd Value SET RESET Store 4th Value gt SE
4. 815 433 5100 FAX 815 433 5104 8 2 Special Characteristics MODEL FUNCTION RANGE ACCURACY RESOLUTION M 3610D 200 mV 0 3 of rdg 1 dgt 100uV M 3630D 2V 1 mV M 3650D DC VOLTAGE 20V 10 mV 200V 100 mV 1000 V 0 5 of rdg 1 dgt_ 1 V 200 mV 0 8 of rdg 3 dgts 100 uV 2V 1 mV AC VOLTAGE 20 V 10 mV 200 V 100 mV 750 V 1 2 of rdg 3 dgts 1 V 200 Q 0 5 of rdg 3 dgts 0 1 Q 2 KQ 1Q 20 KQ 10 Q RESISTANCE 200 KQ 100 Q 2 MQ 1 KO 20 MQ 1 0 of rdg 2 dgts 10 KQ 2000 MQ 5 0 of rdg 5 dgts 1 MQ Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 33 MODEL FUNCTION RANGE ACCURACY RESOLUTION M 3610D 200 uA 0 5 of rdg 1 dgt 0 1 uA M 3630D 2 mA uA M 3650D DC CURRENT 20 mA 10uA 200 mA 1 2 of rdg 1 dgt 100 uA 20A 2 0 of rdg 5 dgt 100 mA 200 uA 1 0 of rdg 3 dgts 0 1 uA 2 mA l uA AC CURRENT 20 mA 10 uA 200 mA 1 8 of rdg 5 dgts 100 uA 20 A 3 0 of rdg 5 dgts 10 mA Notes 1 DC AC Current 20 mA Not available in M 3610D 34 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 MODEL FUNCTION RANGE ACCURACY RESOLUTION M 3610D 2 KHz 1 0 of rdg 1 dgt 1 Hz M 3630D 20 KHz 10 Hz M 3650D 200 KHz
5. Transmission rate 1200 baud e Character coding 7 bit ASCII Parity None e Stop Bits 2 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Data Format The data format consists of a frame of 14 bytes The frames are set as follows BYTE 123456789 ABCDE Example 1 DC 1 999VCR Example 2 1 999 Mohm CR Connection of MT RS 232C cable to the meter c RD FRONT FACE 3 OF 7 METER 2 The following program is an example of a BASIC program that gets a single reading from the meter 10 OPEN COMI 1200 N 7 2 RS CS DS CD AS 2 20 A D 30 PRINT 2 A 40 IN INPUTS 14 2 50 PRINT IN 60 CLOSE 2 70 END Manual Documentation Number M3640D1598 29 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 7 CARE AND MAINTENANCE Your digital multimeter is a precise electronic device Do not tamper with circuit To prevent electric shock hazard turn off the meter and disconnect test leads before removing the back cover 7 1 Replacing the Fuse WARNING TO AVOID ELECTRIC SHOCK DISCONNECT THE TEST PROBES BEFORE REMOVING THE BATTERY OR THE FUSE REPLACE ONLY WITH THE SAME TYPE OF BATTERY OR FUSE DO NOT REMOVE THE TOP COVER SERVICE SHOULD BE PERFORMED ONLY BY QUALIFIED PERSONNEL CAUTION FOR CONTINUED PROTECTION AGAINST FIRE OR OTHER HAZARD REPLACE ONLY WITH FUSE O
6. the hFE You can t measure the hFE of a transistor that is connected in a circuit You cannot measure the hFE of a FET or other non bipolar transistor High voltage junctions in power transistors prevent correct readings Also the larger leads of the power transistor can damage the test socket Do not try to determine type pin out or hFE for power transistors with this meter hFE is affected by temperature Try not to warm the transistor with your hand when you instalI the device in the socket If the hFE reading is not stable when you first measure it let the transistor s temperature stabilize 6 10 Measuring Temperature M 3640D 3660D only The meter can directly display the temperature with dual display by reading Celsius in the main display and Fahrenheit on the sub display at DUAL mode Temperature from 40 C to 1200 C can be measured by using optional K type thermocouple at TEMP position A 1 af ae not use Temperature Measurement Manual Documentation Number M3640D1598 25 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 6 11 Logic Test The logic function lets you easily check digital circuits to determine the logic state of different parts of the circuit Rather than display an absolute voltage this function displays Hi LO or indicate logic high low or undetermined respectively Follow these steps to perform a logic test 1 Rotate the rotar
7. 100 Hz FREQUENCY 1 MHz 1 0 of rdg 1 dgt 1 KHz 2 MHz 1 0 of rdg 1 dgt 1 KHz 20 MHz 10 KHz LOW 2nF 2 0 of rdg 10 dgts 1 pF 20 nF 2 0 of rdg 3 dgts 10 pF 200 nF 100 pF CAPACITANCE HIGH 2 uF 3 0 of rdg 10 dgts_ 1 nF 20 uF 3 0 of rdg 5 dgts 10 nF 200 uF 4 0 of rdg 5 dgts 100 nF DIODE Measures forward resistance of a semiconductor junction in KQ a test current of 1 mA Notes 1 FREQUENCY Not available in M 3610D amp M630D 2 CAPACITANCE Not available in M 3610D Manual Documentation Number M3640D 1598 35 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 8 2 Special Characteristics MODEL FUNCTION RANGE ACCURACY RESOLUTION M 3640D 200 mV 0 3 of rdg 1 dgt 100 uV M 3660D 2V 1 mV DC VOLTAGE 20V 10 mV 200V 100 mV 100 V 0 5 of rdg 1 dgt IV 200 mV 0 8 of rdg 3 dgts 100 uV AC VOLTAGE 2V 2 5 of rdg 5 dgts 1 mV True rms 20V 10 mV 200 V 100 mV 750 V 1 5 of rdg 3 dgts 1 V 200 Q 0 5 of rdg 3 dgts 0 1 Q 2 KQ 1Q 20 KQ 10 Q RESISTANCE 200 KQ 100 2 2 MQ 1KQ 20 MQ 1 0 of rdg 2 dgts 10 KQ Notes AC Voltage True rms 1 2 36 The nominated accuracy is guaranteed when the input value is full scale basis Frequency for accuracy e 40 Hz to 20 KHz for 200 mV 2V 20V amp 200V e 40 Hz to 400 Hz for 750 V Manual Documentation Number M3640D 1598 B amp B Electronics
8. and the computer s serial port as shown 2 Press ON OFF to turn on the meter 3 Turn on the computer 6 12 2 Using the Supplied Software We have included two programs to log and display data collected with your meter The MS DOS program is called METEX and is in the GRAPHIC subdirectory on the supplied diskette The Windows program is called Scopeview and is in the SCOPE directory on the supplied diskette Note You cannot log frequencies on the computer if the voltage exceeds 20V AC 6 12 3 Using the DOS Software Follow these steps to install and run the MS DOS software Note The following steps assume a basic knowledge of MS DOS commands and also assume you have a hard disk Refer to your computer s MS DOS User s Guide for information about MS DOS commands This software requires a VGA monitor 1 Insert the supplied diskette in your computer s drive 2 Create a directory on your hard disk for the software For example to make a directory called METER for the software type cd ENTER md METER lt ENTER gt 3 Make the directory you created the current directory For example if the directory is METER type cd METER lt ENTER gt 4 Copy the files from the GRAPHIC subdirectory on the floppy drive to your hard disk For example type Manual Documentation Number M3640D1598 27 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 copy a GRAPHIC c 5 Torun the pro
9. try to measure DC voltages above 1000 volts or AC voltages above 750 volts rms you might damage your meter and expose yourself to a serious shock hazard Use extreme care when you measure high voltages Never connect the probe you plug into the COM terminal to a source of voltage greater than 500 volts with respect to earth ground This creates a serious shock hazard 3 3 Using the Stand Use your meter s stand to prop up or hang the meter Propping Up the Meter If you prop your meter on a benchtop the stand helps provide a better viewing angle To use the stand as a prop just open it away from the meter and set it on a flat surface Hanging the Meter To hang the meter remove the stand by pressing the lower parts of the stand together Then insert the stand into top 2 holes LIC Manual Documentation Number M3640D1 598 5 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 4 PRE OPERATION CHECK To ensure correct operation and familiarize yourself with the meter follow these steps before you use it 4 1 Press the ON OFF button to ON 4 2 4 3 N 1000 5 E 1s 20 aitiadinibiar hand um nad 1n JUHNESNUAL UU LLAEHENEEH LAMENTA To select a function turn the rotary switch to the appropriate switch position at your desire The meter is ready for normal operation To select an additional operation press the appropriate push b
10. 598 1 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 2 SAFETY INFORMATION 2 1 Safety Requirements This meter has been manufactured and tested in accordance with IEC 348 and DIN57411 VDE0411 Part 1 Safety Requirement for Electronic Measuring Apparatus Safety Class II This manual contains information and warnings which must be observed to assure safe operation and maintain the meter in safe condition NOT FOR HIGH ENERGY INDUSTRIAL USE 2 2 Safety Symbols We have placed the following special markings on the panel to remind you of the measurement limitations and safety 20A mA MAX 500V MAX 1000V 750V 4 AN s The maximum current that you can measure at this terminal is 20 amps DC AC This terminal is fuse protected For your safety during continuous measurements keep the duty cycle within 30 seconds in use and more than 15 minutes in rest The maximum current that you can measure at this terminal is 200mA DC AC This terminal is fuse protected To avoid electrical shock or instrument damage do not connect the Common Input Terminal COM to any source of more than 500 Volts with respect to earth ground The maximum voltage this meter can measure is 1000V DC or 750V AC Be extra careful when making high voltage measurements DO NOT TOUCH THE TERMINALS OR PROBE ENDS Refer to the complete operating instructions Indicates protection class II do
11. 815 433 5100 FAX 815 433 5104 3 PREPARING FOR OPERATION 3 1 Installing the Battery Your meter requires a 9V battery for power The Em symbol appears when the battery voltage drops to certain limits For proper operation replace the battery as soon as possible Continued use with a low battery will lead to abnormal readings WARNING TO AVOID ELECTRIC SHOCK DISCONNECT BOTH LEADS FROM EQUIPMENT BEFORE YOU REMOVE OR INSTALL THE BATTERY Follow these steps to install the battery Turn off the power and disconnect the two test probes 2 Remove the screw to open the battery compartment 3 Place the battery into the insulation capsule and snap it on the contacts WARNING DO NOT DISCARD THE PROVIDED BATTERY INSULATION CAPSULE IF YOU DO NOT USE THIS INSULATION CAPSULE PROPERLY IT MIGHT CAUSE DAMAGE OR INJURY 4 Replace the battery compartment cover and secure it with the screw WARNING DO NOT OPERATE THE METER UNTIL YOU REPLACE THE BATTERY AND CLOSE THE BATTERY COMPARTMENT COVER 4 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 3 2 Using the Test Probes Use only the type of test probes supplied with your meter These test probes are rated for 1200 volts Cautions e Although the replacement test probes are rated for 1200 volts the maximum rating of your meter is 1000 volts DC and 750 volts AC If you
12. ET button to get the memorized value back on the LCD Then the reference value you chose will appear on the sub display 25 Dual Display Lets you have two primary secondary readings on the LCD in the following ranges See Table 3 Table 3 Dual Display INPUT RANGE MAIN DISPLAY SUB DISPLAY AC VOLTAGE VOLTAGE FREQUENCY FREQUENCY FREQUENCY AC VOLTAGE LOGIC HI LO FREQUENCY ex G00 19 9 9 5 LJ 5 20 5 Toreatrecedieradereatonrebecaetreeotantl LLTILE CEETTETET TPITEFTTTE TTTTTTTTTI IITTTI Notes Your meter will display Ripple Frequency at DC Voltage position e In the ranges of DC AC A Resistance Diode and hFE the sub display might show the FREQ 000 This is not intended for dual display mode e When you select dual measurement while measuring frequency the meter selects the 20V AC range for the secondary display To measure both the voltage and frequency when the voltage is greater than 20V AC select AC voltage as the primary measurement 26 Communication Manual Documentation Number M3640D1 598 13 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Allows you to interface the meter with your PC to communicate with your PC in all function ranges To avoid operation error do not set your meter at mode during communicating with a computer 27 Comparison Enables you to do the High Low Test of subsequent readings by comparing a reading with both the store
13. F THE SPECIFIED VOLTAGE AND CURRENT RATINGS Follow these steps to replace the fuse Press ON OFF button to turn the meter off and disconnect the test probes 2 Remove the back cover by unscrewing the four screws and pulling off the meter s cover PA 250V 4 Install the new fuse in the fuse compartment 5 Replace the back cover and secure it with the screws WARNING DO NOT OPERATE YOUR METER UNTIL THE BACK COVER IS IN PLACE AND FULLY CLOSED 30 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 7 2 General Maintenance Any adjustments maintenance or repair of the instrument except battery and fuse replacement should be done only by qualified service personnel 1 2 Keep your meter dry If it does get wet wipe it dry immediately Liquids might contain minerals that can corrode the electronic circuits Use and store your meter only in normal temperature environments Extreme temperatures can shorten the life of electronic devices damage battery and distort or melt plastic parts Handle your meter gently and carefully Dropping it can damage circuit boards and cases and cause the meter to work improperly Keep your meter away from dust and dirt which can cause premature wear of parts Wipe your meter with a damp cloth occasionally to keep it looking new Do not use harsh chemicals cleaning solvents or strong detergents to
14. Hz 2 20 MHz for M 3650D 3660D 34 TEMP Temperature M 3640D M 3660D only Can measure from 40 C to 1200 C by using the optional K type thermocouple 35 CAP Capacitance Except M 3610D Let you to measure capacitance from LO nF 2 20 200 to Hi uF 2 20 200 36 hFE Transistor hFE Except M 3610D Enables you to measure hFE value 37 LOG Logic Test Enables you to check logic levels without extra logic probes This function displays Hi Lo or to indicate logic high logic low or undetermined respectively 38 dB Decibels M 3640D 3660D only Enables to check the logarithmic ratio of input voltage to the standard stored value 39 Sub display Lets you see the secondary readings in all function modes 40 Low Battery Meter is powered by a single 9V battery At least 8 hours of battery life remain when L3 is first displayed Manual Documentation Number M3640D 1598 15 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 41 The following annunciators indicate the unit of the value displays AC DC mv V KHz MHz C F uF nF A mA Q KQ MQ dB Alternating current or voltage Direct current or voltage Millivolts 1x10 volts Volts Kilohertz 1x10 cycles Frequency Megahertz 1x10 cycles Frequency Centigrade Degree Fahrenheit Degree Microfarads 10 Farads Nanofarads 10 Farads Ampere Amps Current Milliampere 1x10 amps Current
15. If you set the meter for DC current appears or disappears to indicate the polarity of the measured current 6 3 Continuity Testing 039 mV o E 5 20 TETTTITTLT CETTE ECLLTITELLLTTTL LLULLLLLII Audible Continuity Test Continuity testing verifies that circuit connections are intact To perform audible continuity tests set the rotary switch to F and connect the meter to your circuit Caution Never perform a continuity measurement on a circuit that has power connected Note The buzzer sounds if the measured resistance is below 40 ohms Manual Documentation Number M3640D 1598 19 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 6 4 Measuring Resistance WARNING NEVER CONNECT THE TEST PROBES TO A SOURCE OF VOLTAGE WHEN YOU HAVE SELECTED THE OHMS FUNCTION AND PLUGGED THE PROBES INTO V Q TERMINAL BE SURE THAT THE CIRCUIT UNDER TEST HAS ALL POWER REMOVED AND THAT ANY ASSOCIATED CAPACITORS ARE FULLY DISCHARGED BEFORE YOU MAKE A RESISTANCE MEASUREMENT Follow these steps to measure resistance 1 Set the rotary switch to any of 200 Ohm to 2000 Mohm with 7 steps for Model M 3610D 3630D 3650D or 200 to 20 Mohm with 6 steps for Model M 3640D 3650D 2 Connect the test Ieads to the device you want to measure 1999 l o s J 5 20 T T Mo Resistance measurement Notes e The resistance in the test leads can diminish accuracy on the lowest 200 ohm r
16. Not Recommended for New Installations Please contact Technical Support for more information True RMS Handheld Multimeter Model M 3640D Documentation Number M3640D1598 B amp B Electronics Mfg Co Inc 707 Dayton Road P O Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Internet http www bb elec com sales bb elec com support bb elec com B amp B Electronics May 1997 Manual Documentation Number M3640D1598 Cover Page B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 ATTENTION METEX USERS This addendum contains corrections and additions to the user s manual Paragraph 6 12 2 page 32 of the M 3640D Digital Multimeter manual refers to two computer programs METEX and Scopeview These programs are no longer available and have been replaced by METVIEW This program works with Windows 3 11 Windows 95 and Windows NT Please use the following Installation information and NOT the information in the manual The Hardware Interfacing information in paragraph 6 12 1 is correct Installing the Supplied Software We have included a Windows 95 NT program named METVIEW EXE to log data collected with your meter To install the software on your hard drive 1 Insert the disk in drive A 2 Click the start button in the lower left corned of the screen and choose Settings I Control Panel I Add Remove Programs 3 Click the install button and follow th
17. Ohm Kiloohm 1x 10 Megaohm 1x10 Decibels Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 6 HOW TO MAKE MEASUREMENTS This section discusses some common applications for your meter and alerts you to some considerations to keep in mind when making measurements 6 1 Measuring DC AC Voltage WARNING DO NOT TRY TO MEASURE A VOLTAGE GREATER THAN 1000 VOLTS DC OR 750 VOLTS AC YOU MIGHT DAMAGE YOUR METER AND EXPOSE YOURSELF TO A SEVERE SHOCK HAZARD Follow these steps to measure DC AC Voltage 1 Set the rotary switch to the desired voltage position with 5 steps 200mV 2 20 200V DC AC and 1 000V DC 750V AC 2 Press the DC AC button to toggle between alternating and direct voltage 3 Connect the meter in parallel with the load or circuit Notes e Due to the sensitive nature of 200mV amp 2V AC ranges your meter displays a small value This residual value will not affect the actual measurements DC Voltage AC Voltage measurement measurement e Each of the five dc ac voltage ranges presents an input impedence of approximately 10M Q in parallel with less than 100pF AC voltage in ac coupled to the 10M Q input Manual Documentation Number M3640D 1598 17 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 6 2 Measuring Current WARNING YOU MAY DAMAGE THE METER OR BE INJ
18. T RESET gt 4 To exit mode press the function key or turn the rotary switch to an adjacent range Your meter will display the difference between the stored reference value and subsequent readings on the sub display while showing the present measurement on the main display For example if the stored reference value is 100 0V and the present reading is 90 0V the sub display will indicate 10 0 V and the main display will indicate 90 0V If the new reading is the same as the reference value the display will be zero In this mode the total range of relative offset is 1999 counts 23 MEM Memory Enable you to memorize the reference values up to 10 measurements in the meter To memorize the reference value follow these steps 1 Set the function mode at MEM mode 2 Press UP DOWN buttons to address the number from 0 to 9 3 Press SET RESET button to memorize the reference value you desire If you memorize the reference values continuously under the same address number then the previous reference value will be cleared automatically 12 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 24 Memory Recall Enables you to get the memorized reading back on the LCD To get the memorized reference value follow these steps 1 Set the function mode at RCL mode 2 Press UP DOWN buttons to address the number from 0 to 9 3 Press SET RES
19. URED IF THE FUSE BLOWS WHILE CURRENT IS BEING MEASURED IN A CIRCUIT WHICH EXHIBITS AN OPEN CIRCUIT VOLTAGE GREATER THAN 250V THE 20A TERMINAL IS FUSED A SEVERE FIRE HAZARD AND SHORT CIRCUIT DANGER EXISTS IF YOU APPLY A VOLTAGE WITH HIGH CURRENT CAPABILITY TO THIS TERMINAL THE METER CAN BE DESTROYED UNDER SUCH CONDITI ONS Follow these steps to measure Current 1 Set the rotary switch to the desired Ampere position with 5 steps of 200 uA 2 20 200mA 20A for M 3630D 3650D and with 4 steps of 200 WA 2 200mA 20A for M 3610D and with 3 steps of 2 200mA 20A for M 3640 3660D 2 Press the DC AC button to toggle between alternating and direct current 3 Connect the meter in series with the load or circuit under test n 1909 1253 9 g LI B TTL ETTTTETT TEE TITT TET TITTT ELIT ant DC Current AC Current measurement measurement 18 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Notes f you do not know approximately what the current is connect the circuit to 20A input terminal first to see if you have a safe level for the mA input terminal Use the mA input terminal for Current up to 200mA When measuring Current the meter s internal shunt resistors develop a voltage across the meter s terminals called burden voltage This voltage drop is very low in your meter but it may affect precision circuits or measurements
20. a eA IRR Sot 14 6 HOW TO MAKE MEASUREMENTS eee 17 6 1 Measuring DC AC Voltage sese 17 6 2 Measuring Current seee re t aia a nennen nenne 18 6 3 Continuity Testing i niuis eee eti teet thee uei 19 6 4 Measuring Resistance sessssssseeseeeeeeeeen eene 20 6 5 Checkung Diode iuh eie e tm i teet tet 21 6 6 Measuring Frequency sesseseeeseeeeeenen rennen 22 6 7 Measuring Capacitance essssesseeeeseeee eere 23 6 8 dB Measurement M 3640D 3660D only sess 23 6 9 Checking Transistors eese enne 24 6 10 Measuring Temperature M 3640D 3660D only 25 6 11 gic T6St ettet et eae 26 6 12 Using the Meter with a Computer see 27 7 CARE AND MAINTENANCE esee ener 30 7 1 Replacing the Fuse 4 eee titt tette 30 7 2 General Maintenances seseris orcii iiis eii iesiri 31 8 SPECIFICA TONS r a ai RE Aver EER E EAER i 32 8 1 General Characteristics sese 32 8 2 Special Characteristics lt i eee e eee ere REUS s 36 Due to our policy to refine the products continuously this manual may contain minor differences in specifications components parts and circuit design from the instrument actually delivered Table of Contents Manual Documentation Number M3640D 1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100
21. ange The error is usually 1 to 0 2 ohms for a standard pair of test leads To determine the error short the test leads together and read the resistance of the leads When measuring resistance be sure that the contact between the probes and the circuit is good Dirt oil solder flux or other foreign matter seriously affect resistance e If the measured resistance value exceeds the maximum value OL displays to indicate overload and the bar graph flashes For resistance of approximately 1 Megaohm and above the display might take a few seconds to stabilize This is normal for high resistance readings 20 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 6 5 Checking Diode This function lets you check diodes and other semiconductors for opens and shorts It also lets you determine the forward voltage for diodes You can use this function when you need to match diodes Follow these steps to check Diode Rotate the rotary switch to ru position 2 Plug the test probes into the COM and V Q terminals 3 Connect the test leads to the diode you want to check and note the meter reading Diode measurement Notes e If the display indicates an overrange condition reverse the polarity of the connection e If the display shows a value the device is good The displayed value is the components actual forward voltage up to 2 0 volts e
22. anual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 WARRANTY Warrants this instrument to be free from defects in material and workmanship for a period of one year Any instrument found defective within this period from the delivery date and returned to the factory with transportation charges prepaid will be repaired adjusted or replaced at no charge to the original purchaser This warranty does not cover expendable items such as batteries or fuses If the defect has been caused by misuse or abnormal operating conditions the repair will be billed at a nominal cost Manual Documentation Number M3640D 1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 39
23. clean the meter Use only a brand new battery of the same size and type Always remove an old or weak battery It can leak chemicals that destroy electronic circuits Modifying or tampering with your meter s internal components can cause a malfunction and might invalidate its warranty Manual Documentation Number M3640D 1598 31 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 8 SPECIFICATIONS 8 1 General Characteristics e Max Display 1999 Counts 3 Digit with automatic polarity indication Max Input Current of AC E DG secte etr e S NS TRUE ees 20A Reading Time ce e UE REP ES 1 2 reading per second Operating Temperature ssssseseeeeeeeeeeeenene 0 C to 40 32 F to 104 F e Storage Temperature seseseeeeeeeee 10 C to 50 C 14 F to 122 F e Temperature for Guaranteed Accuracy 23 C 5 C Battery typeert ot REPE NEDA 1604 9V or 6F22 9V e Size Hx WxL uu suisses edite n erbe 84x187x34mm Netwelghtz 2e eR aene 305g 10g Including 9V Battery Supplied ACCESSOFIeS soe ire b esc ee e e ipe eel Operating Manual pair of Test Leads Spare Fuse 9V Battery Optional Accessories h oe ieo ie aE E E EEEE eene eene nene Carrying Case Interface Cable MT RS 232C Floppy disc with software K type thermocouples 32 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH
24. d high reference value and the stored low reference value On the sub display Lo sign for reading less than the low reference value Hi sign for reading more than the high reference value and PASS sign for middle ranges will be shown To store the reference values of Min Max see the steps of REL 2 3 To exit mode press the function key or turn the rotary switch to an adjacent range 28 Display for address number To operate this address number you can address the stored reference values up to 10 measurements in the MEM and RCL press UP DOWN buttons modes each time 5 5 Annunciators Items 29 32 describe annunciators that indicate the mode or state in which the meter is operating 29 t Diode Test The value displayed is the forward voltage of semiconductor function s at approximately 1 mA test current Single 0 2 0V range 30 AC Alternating Current or Voltage 31 Continuity Check Make it easy to check wiring continuity of cables fuses and connections etc 32 am Negative Polarity Automatically indicates negative inputs When is enabled indicates negative results of math calculations 33 FREQ Frequency Count Mode Can measure up to 1 MHz with 4 steps of 2 20 200KHz 1 MHz for M 3610D 3630D 3640D 14 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Can measure up to 20 MHz with 5 steps of 2 20 200K
25. e directions Using the Software To run the software after it has been installed click the start button in the lower left corner of the screen and choose Programs I Metex I Metex After starting the metex program click the setup button A dialog box appears that allows you to select the serial communications port sampling interval and logging file Note that the logging file can only be changed when the Enabled Data Logging check box is checked The filename may be typed in or you can click the browse button to select where the file should be located Once you have completed the setup click the OK button To start collecting data from the meter click the button labeled start Data is read from the meter at the sampling interval that was selected when you setup the software If data logging is enabled the data is written to a disk file To stop collecting data click the button labeled stop Note that this is the same button as the start button Addendum Manual Documentation Number M3640D1 598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Format of the Data File The data is written to the logging file as fixed length records The format is HH MM SS XX1HHHHHFY Y YY where HH MM SS is the hour 24 hour format minute and second when the sample was taken XX is the meter function HHHHHIE is the value read from the meter and Y YYY is the units This file can be read by a pro
26. f the display still indicates an overrange condition the device is open e If the display shows a value both before and after you reverse the polarity the device is shorted Manual Documentation Number M3640D 1598 21 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 6 6 Measuring Frequency WARNING IF YOU TRY TO MEASURE THE FREQUENCY OF A SIGNAL THAT EXCEEDS 750 VOLTS AC RMS YOU MIGHT DAMAGE YOUR METER AND EXPOSE YOURSELF TO SEVERE SHOCK HAZARD Follow these steps to measure the frequency of a signal 1 Set the function selector to the FREQ position with 4 steps 2 20 200KHz amp 1 MHz for M3610D 3630D 3640D and 5 steps 2 20 200 KHz 2 20 MHz for M 3650D 3660D 2 Plug the test probes into the COM and V Q terminals 3 Connect the test leads to the frequency source Caution M3610D M3630D M3640D e For measurement 200KHz above neither interface the meter with a P C nor select the function mode COM Doing so your meter will displays the ambiguous value 1989 1989 Frequency measurement Notes When the test probes are connected to an AC outlet do not turn the function selector switch to another range It may damage the internal components or you Overload Protection 750V DC AC RMS Input limit voltage AC 20V rms w dual mode amp PC interface For the most accurate measurement we strongly recommend you to use the type of BNC cable 22 Man
27. gram such as Microsoft Excel to analyze the data or print out a chart Telephone ene 815 433 5100 8 am 4 30 pm Central Standard Time Monday through Friday 24 hour FAX esee 815 433 5104 Intemet E Mail sales oiseau orders bb elec com Technical Support support bb elec com World Wide Web Site http www bb elec com Postal Mail eee B amp B ELECTRONICS MFG CO INC 707 DAYTON ROAD PO BOX 1040 OTTAWA IL 61350 USA Manual Documentation Number M3640D1598 Addendum B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Table of Contents T INTRODUCTION coe RED 1 2 SAFETY INFORMATION eese enne enne 2 2 1 Safety Requirements essere eene 2 2 2 Safety Symbols ir asc sek hail ale dia Ri RR 2 2 3 Safety Warning i i sth ce AA fenem 3 3 PREPARING FOR OPERATION eese 4 3 1 Installing the Battery sss 4 3 2 Using the Test Probes cissiesee rciris vitrni eire ri 3 3 3 Using the Stand cece nO a a e eE EEEa EEEa 5 4 PRE OPERATION CHECK eaaa E E ae 6 5 HOW TO USE THE METER oone ie a R a E 7 521 Bushbuttorns eei nee te i ses i ee eei 7 5 2 Items 7 8 describe the Sockets ssssssee 8 5 3 Input Terminals ui ehe ee e eei 10 5 4 Digital and Bar Graph Displays eee 10 5 5 Annunclators ei eg e eie
28. gram type METEX lt ENTER gt Follow the on screen help for specific operating instructions Notes e If you do not have a hard disk you can still run the program from the supplied floppy diskette Change to the GRAPHIC subdirectory on the diskette and type METEX ENTER e To stop the program or to escape from a device I O error press lt CTRL BREAK gt 6 12 4 Using the Windows Software Follow these steps to install and run the Windows software Note The following steps assume a basic knowledge of Microsoft Windows Refer to your computer s Windows User s Guide for information about using Windows This software requires Microsoft Window Version 3 1 and a VGA or EGA display 1 Start your computer and run Windows 2 Insert the supplied diskette in your computer s drive 3 From the Windows Program Manager pull down the FILE menu and select the RUN option 4 At the prompt type a scope setup ENTER If you placed the diskette in Drive A b scope setup ENTER If you placed the diskette in Drive B 5 Follow the on screen prompts to complete installation 6 Torun the program double click the SCOPEVIEW icon Follow the on screen help for specific operating instructions Also refer to the README file in the diskette s SCOPE subdirectory for operation hints 6 12 5 Technical Information You need the following information if you are writing your own interface software Communication parameters 28
29. indicates the Logarithmic ratio of input voltage to the standard stored value e During activation of dB measurement the auto power off will not work Table 4 Logorithmic ratio INPUT VOLTAGE DB 0 075 mV 60 dB 109 mV 17 dB 1 94 V 19 40 V 28 dB 6 9 Checking Transistors WARNING The transistor socket is not protected against overload You can damage the meter and void your warranty if you build and use external leads for the transistor socket Follow these steps to determine a transistor s base gain 1 Rotate the rotary switch to the hFE positon 2 Insert the transistor you want to measure into the appropriate transistor socket Your meter displays the transistor s hFE value Tut innn Transistor hFE Test 24 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Notes Insert the base collector and emitter pins into the correct sockets Some power Darlington transistors contain internal base to emitter resistors Because the meter uses two current readings to calculate hFE any internal transistor resistance causes undependable readings Do not take the hFE reading as an absolute measurement but rather as an indication that the transistor is operation The true gain of a transistor depends on its operating current This meter applies up to 1000 uA to the emitter and collector and measures the collector current to calculate
30. ogic Test dB Decibel Manual Documentation Number M3640D1 598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 5 3 Input Terminals Items 10 13 describe the input terminals See Table 1 for overload limits 10 20A Amperes Input Terminal For current measurements AC or DC up to 20A when function selector switch is in the 20A position 11 mA Milliamp Input Terminal For current measurements up to 200mA AC or DC when the function selector switch is in the mA position 12 COM Common Terminal Return terminal for all measurements 13 V Q Continuity Diode Ohms Volt Frequency dB Logic Test Terminal 5 4 Digital and Bar Graph Displays Items 14 16 amp 17 describe the digital and bar graph displays 14 Digital Display Digital readings are displayed on a 1999 count display with automatic polarity indication and decimal point placement gs MNOM Analog Bar Graph The bar graph consists of 23 segments that illuminate from left to right as the input increases It functions much the same as the needle on an analog meter without the mechanical overshoot inherent in needle movements If the input equals or exceeds 1 999 counts on the range selected OL is displayed with flashing in the Bar graph 5 10 15 20 16 bidiubinibiiduaridbennibrnirannid Bar Graph Scale Scale for absolute readings 10 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040
31. ual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 6 7 Measuring Capacitance Follow these steps to measure capacitance normal Discharge each capacitor before testing by shorting its leads together Use caution when handling some capacitors as they can be charged with considerable electricity Caution If you attempt to measure the capacitance of a charged capacitor you might damage your meter 2 Setthe rotary switch to either Lo or Hi of CAP range Lo nF 2 20 200 High uF 2 20 200 3 Insert the discharged capacitor into the CAP and clips connector Your meter displays the capacitance value capacitance measurement Notes e For polarized capacitors be sure to insert the negative lead in the minus clip e In this mode s Hi the auto power off function does not work 6 8 dB Measurement M 3640D 3660D only WARNING DO NOT TRY TO MEASURE A VOLTAGE GREATER THAN 20V AC YOU MIGHT DAMAGE YOUR METER AND EXPOSE YOUR SELF TO A SEVERE SHOCK HAZARD Follow these steps to measure the dB decibels 1 Set the rotary switch to the desired position with 2 steps input voltages 200mV amp 20 V AC range 2 Connect the meter in parallel with the load or circuit Manual Documentation Number M3640D1598 23 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Notes e dB decibels in the display
32. uble insulation Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 2 3 Safety Warnings 2 3 1 2 3 6 2 3 7 To prevent electric shock hazard and or damage to the meter do not measure voltage exceeding 1000V DC or 750V AC To avoid damage to the meter and or injury observe the input limits as stated in Table 1 To avoid damage to the meter disconnect test leads from test points before changing the function range To avoid electric shock use caution when working above 60V DC or 25V AC RMS Such voltage pose a shock hazard The 20A range is protected by the fuse To avoid damage or injury use the meter only in circuits limits by fuse or circuit breaker to 20A or 4000VA Do not apply voltage to between 20A or mA and COM terminals This warning is to assure protection against injury and or damage to the meter and the user Do not get the meter and test leads wet Ensure the test leads are in good condition Table 1 INPUT LIMITS FUNCTION TERMINAL INPUT LIMITS VDC V Q COM 1000V DC V AC V Q COM 750V AC Q V Q COM 250V DC AC mA DC AC mA COM 200mA DC AC 20A DC AC 20A COM 20A DC AC 9 V Q COM 250V DC AC Freq V Q COM 750V DC AC Logic V Q COM 250V DC AC DB V Q COM 20V AC Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH
33. urn the meter off Automatic Power off Automatic Power off extends the life of the battery by turning the meter off if neither the rotary switch nor a pushbutton is operated for 10 minutes However during communication with a PC Hi mode at capacitance AC mV range and dB measurement power will not be turned off automatically FUNCTION Press to enter the RCM modes WPress again to scrol WPress to exit at CRELO amp modes ON OFF FUNCTION SET RESET DC AC Press to turn E e to toggle te meter HO ZB c3 CZ between DE y o a e y LAG UP DOWN E A i m SET RESET 5 WPress to enter WPress to exit from the function modes except REL amp CMP modes WPress to determine the CRE Ye t value of the reference value at REL CMP modes mPress to to address the Sa reference value at MEM amp RCL modes Table 2 Summary of Pushbutton Operations 2 FUNCTION Manual Documentation Number M3640D 1598 7 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 The sign will be displayed on the LCD when you turn the power on Press the FUNCTION button to enter the function mode You can select a function mode at your desire by pressing the FUNCTION button and SET RESET button by turns e Sequence of scroll in the Function modes CD MIND MAX MEM RCL gt DUAL gt C COM gt CMP 3 SET RESET Press the SET RESET b
34. utton to enter the selected function mode and press again to exit Then the will be displayed on the LCD In the function modes of CREL and CMP the RESET function does not work To exit from these modes you have to move the selector switch to an adjacent range or press the function key 4 DC AC Press DC AC button to toggle between DC and AC when the rotary switch is set to Voltage or Current 5 amp 6 UP DOWN Press UP DOWN buttons to determine the polarity value of the reference value in the CREL and CMP modes to address the stored reference value in the MENM and modes 5 2 Items 7 8 describe the Sockets 7 TRANSISTOR hFE Insert the base collector and emitter pins in the correct sockets as marked 8 CAPACITOR excluding M 3610D TEMPERATURE SOCKET M 3640D M 3660D only 8 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Insert the discharged capacitor into the CAP and clips connectors as marked Insert the optional K type thermocouples into the correct sockets as marked Temperature Capacitance 9 FUNCTION SELECTOR ROTARY SWITCH Item 9 describes functions that are selected by setting the rotary switch mV Millivolts ac dc V Volts ac dc mA Milliampere ac dc A Amperes ac dc Kg Continuity Q Resistance Diode Test FREQ Frequency CAP Capacitance hFE Transistor TEMP Temperature HIGH HOW L
35. uttons above the rotary See Table 2 To operate the UP DOWN buttons press to address the stored reference value in the MEM i modes press to determine the polarity reference value in the CREL and CMP modes To operate the FUNCTION button press to select the function mode at your desire press again to scroll and press SET RESET button twice to exit To operate the SET RESET button press to enter and press again to exit To operate the DC AC button press to toggle between AC and DC when the rotary switch set to Voltage or Current Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 5 HOW TO USE THE METER This section describes your meter and how to use it FOR EASE OF REFERENCE EACH DESCRIPTION IS NUMBERED AND KEYED TO THE ILLUSTRATION INSIDE THE FRONT COVER 5 1 Pushbuttons Items 1 6 describe how to use the pushbuttons These buttons are used in conjunction with rotary switch to select operating modes When a button is pushed the beeper sounds A summary of pushbutton operation is shown in Table 2 An annunciator is displayed to indicate that a mode or function has been selected A quick way to reset all the pushbuttons to their default state is to turn the rotary switch to an adjacent function and then back to the function you are using 1 ON OFF POWER ON OFF Press the ON OFF RED button to turn the meter on Press again to t
36. y switch to the HIGH LOW range 2 Plug the test leads into the COM and V Q inputs 3 Connect the black probe to the ground point GND of the test circuit and the red probe to the supplying voltage point V While keeping the test probes firmly connected to each point press SET RESET button 4 While keeping a connection between the black probe and the circuits GND point move the red probe to the other desired points The meter immediately displays one of the 3 modes as follows If value exceeds above 70 of the stored value the Hi HIGH appears If value falls below 30 of the stored value Lo LOW appears e If value is between stored reference value segment appears H 5 5 20 ETELTLTEEITEEEELEUETTEITTT EITTEITTE LEIT CIRCUIT BOARD JT D E m 2 T 0t Ol 0 Out St 0 0 i ay m O O e 4 Ves Logic Test Notes e n this mode the MIN and functions do not work To set the reference value the supplying voltage should be 3V or more The testing range of logic is limited from OV up to 19 99V 26 Manual Documentation Number M3640D1598 B amp B Electronics PO Box 1040 Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 6 12 Using the Meter with a Computer 6 12 1 Interfacing the Meter with a Computer Follow these steps to connect the meter to a computer 1 Connect the supplied RS 232C cable between the meter s
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