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Not Recommended for New Installations.
Please contact Technical Support for more information.
True RMS Handheld Multimeter
Model M-3640D
Documentation Number M3640D1598
B&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 [email protected] [email protected]
B&B Electronics -- May 1997
Manual Documentation Number M3640D1598
Cover Page
B&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 These programs are no longer available and have been replaced by METVIEW.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. 2. 3. Insert the disk in drive A. Click the start button in the lower left corned of the screen and choose "Settings I Control Panel I Add / Remove Programs". Click the install button and follow the 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 M3640D1598
B&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 XX######YYYY where HH:MM:SS is the hour (24 hour format), minute and second when the sample was taken, XX is the meter function, ###### is the value read from the meter, and YYYY is the units. This file can be read by a program, such as Microsoft Excel, to analyze the data or print out a chart.
Telephone........................................ 815-433-5100 8 am--4:30 pm Central Standard Time Monday through Friday 24-hour FAX ................................... 815-433-5104 Intemet E-Mail Sales.................................. [email protected] Technical Support............. [email protected] World-Wide Web Site ..... http://www.bb-elec.com Postal Mail ..................................... B&B ELECTRONICS MFG CO INC 707 DAYTON ROAD PO BOX 1040 OTTAWA IL 61350 USA
Manual Documentation Number M3640D1598
Addendum
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 433-5104
Table of Contents
1. INTRODUCTION ..................................................................................1 2. SAFETY INFORMATION ....................................................................2 2-1. Safety Requirements........................................................................2 2-2. Safety Symbols ................................................................................2 2-3. Safety Warnings ..............................................................................3 3. PREPARING FOR OPERATION ..........................................................4 3-1. Installing the Battery .......................................................................4 3-2. Using the Test Probes ......................................................................5 3-3. Using the Stand................................................................................5 4. PRE-OPERATION CHECK...................................................................6 5. HOW TO USE THE METER.................................................................7 5-1. Pushbuttons......................................................................................7 5-2. Items 7-8 describe the Sockets. .......................................................8 5-3. Input Terminals..............................................................................10 5-4. Digital and Bar Graph Displays.....................................................10 5-5. Annunciators..................................................................................14 6. HOW TO MAKE MEASUREMENTS ................................................17 6-1 . Measuring DC /AC Voltage .........................................................17 6-2. Measuring Current .........................................................................18 6-3. Continuity Testing .........................................................................19 6-4. Measuring Resistance ....................................................................20 6-5 Checking Diode ..............................................................................21 6-6. Measuring Frequency ....................................................................22 6-7. Measuring Capacitance..................................................................23 6-8. dB Measurement (M-3640D/3660D only) ....................................23 6-9. Checking Transistors .....................................................................24 6-10. Measuring Temperature (M-3640D / 3660D only) .....................25 6-11. Logic Test ....................................................................................26 6-12. Using the Meter with a Computer ...............................................27 7. CARE AND MAINTENANCE ............................................................30 7-1. Replacing the Fuse.........................................................................30 7-2. General Maintenance.....................................................................31 8. SPECIFICATIONS...............................................................................32 8-1. General Characteristics..................................................................32 8-2. Special Characteristics...................................................................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 M3640D1598 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- 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.
Manual Documentation Number M3640D1598
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 433-5104
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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 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, double insulation.
mA
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2-3. Safety Warnings
2-3-1. 2-3-2. 2-3-3. 2-3-4. 2-3-5. 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. 2-3-6. 2-3-7. Do not get the meter and test leads wet. Ensure the test leads are in good condition. Table 1. INPUT LIMITS FUNCTION V DC V AC mA DC/AC 20A DC/AC TERMINAL V/+COM V/+COM V/+COM mA+COM 20A+COM V/+COM Freq. Logic DB V/+COM V/+COM V/+COM INPUT LIMITS 1000V DC 750V AC 250V DC/AC 200mA DC/AC 20A DC/AC 250V DC/AC 750V DC/AC 250V DC/AC 20V AC
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3. PREPARING FOR OPERATION
3-1. Installing the Battery
Your meter requires a 9V battery for power. The 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: 1. 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.
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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: · 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 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.
Manual Documentation Number M3640D1598
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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 To select a function, turn the rotary switch to the appropriate switch position at your desire. The meter is ready for normal operation. 4.3 To select an additional operation, press the appropriate push buttons above the rotary (See Table 2) · To operate the UP DOWN buttons, press to address the stored reference value in the ; modes, press to determine the and modes. polarity, reference value in the 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.
· · ·
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Manual Documentation Number M3640D1598
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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 turn 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.
2. FUNCTION Manual Documentation Number M3640D1598
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The sign on.
will be displayed on the LCD when you turn the power
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. · Sequence of scroll in the Function modes
3. SET/RESET Press the SET/RESET button to enter the selected function mode and press again to exit. Then the will be displayed on the LCD.
and , the RESET function does In the function modes of 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 & 6. UP DOWN Press UP DOWN buttons to determine the polarity, value of the reference value in the and modes, to address the stored reference value in the 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
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Insert the discharged capacitor into the CAP + and - clips connectors, as marked. Insert the optional K-type thermocouples into the correct sockets, as marked.
9. FUNCTION SELECTOR ROTARY SWITCH Item 9 describes functions that are selected by setting the rotary switch. mV V mA A Millivolts Volts Milliampere Amperes Continuity Resistance Diode Test Frequency Capacitance Transistor Temperature Logic Test Decibel ac/dc ac/dc ac/dc ac/dc
FREQ CAP hFE TEMP HIGH HOW dB
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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/ Continuity, Diode, Ohms, Volt, Frequency, dB, Logic Test Terminal.
5-4. Digital and Bar Graph Displays
Items 14-16 & 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. 15. 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. 16. Scale for absolute readings. Bar Graph Scale
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17. OL
Overload Indication
OL is displayed with flashing the bar-graph, when input is too excess to display.
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 wilI be displayed on the main-display. 20. 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.
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Example: Store Polarity +/ - (with UP/DOWN) SET/RESET Store 1st Value SET/RESET Store 2nd Value SET/RESET Store 3rd Value SET/RESET Store 4th Value SET/RESET 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. 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 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.
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Manual Documentation Number M3640D1598
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24.
Memory Recall
Enables you to get the memorized reading back on the LCD. To get the memorized reference value, follow these steps: 1. 2. 3. Set the function mode at mode. Press UP DOWN buttons to address the number from 0 to 9. Press SET/RESET button to get the memorized value back on the LCD. Then the reference value you chose will appear on the sub-display. Dual-Display
25.
Lets you have two primary+secondary readings on the LCD in the following ranges (See Table 3) Table 3. Dual-Display INPUT RANGE AC VOLTAGE FREQUENCY TEMPERATURE LOGIC dB MAIN-DISPLAY VOLTAGE FREQUENCY °C HI/LO dB SUB-DISPLAY FREQUENCY AC VOLTAGE °F FREQUENCY AC VOLTAGE
Notes: · Your meter will display Ripple Frequency at DC Voltage position. · 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. · 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 13
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Manual Documentation Number M3640D1598
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 stored 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 press UP DOWN buttons. and modes, each time
5-5. Annunciators
Items 29-32 describe annunciators that indicate the mode or state in which the meter is operating.
29.
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. Negative Polarity is enabled, Automatically indicates negative inputs. When 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
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Can measure up to 20 MHz with 5 steps of 2, 20, 200KHz, 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, 2O, 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 is first displayed.
Meter is powered by a single 9V battery. At least 8 hours of battery life remain when
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41. The following annunciators indicate the unit of the value displays: AC DC mV V KHz MHz °C °F uF nF A mA K M dB Alternating current or voltage Direct current or voltage Millivolts (1x10-3 volts) Volts Kilohertz (1x103cycles) Frequency Megahertz(1x106cycles) Frequency Centigrade Degree Fahrenheit Degree Microfarads (10-6 Farads) Nanofarads (10-9 Farads) Ampere (Amps) Current Milliampere (1x10-3amps) Current Ohm Kiloohm(1x103) Megaohm (1x106) Decibels
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Manual Documentation Number M3640D1598
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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: · Due to the sensitive nature of 200mV & 2V AC ranges, your meter displays a small value. This residual value will not affect the actual measurements.
·
Each of the five dc/ac voltage ranges presents an input impedence of approximately 10M in parallel with less than 100pF. AC voltage in ac-coupled to the 10M input. 17
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6-2. Measuring Current
WARNING: YOU MAY DAMAGE THE METER OR BE INJURED 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 µA, 2, 20, 200mA, 20A (for M-3630D/3650D) and with 4 steps of 200 µA, 2,200mA, 20A (for M-3610D) and with 3 steps of 2, 200mA, 20A (for M-3640/3660D). Press the DC/AC button to toggle between alternating and direct current. Connect the meter in series with the load or circuit under test.
2. 3.
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Notes: · If 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. · If you set the meter for DC current,--appears or disappears to indicate the polarity of the measured current.
6-3. Continuity Testing
Continuity testing verifies that circuit connections are intact. To perform and connect the meter audible continuity tests, set the rotary switch to 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.
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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/ 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.
Notes: · The resistance in the test leads can diminish accuracy on the lowest (200-ohm) range. 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. · 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.
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Manual Documentation Number M3640D1598
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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
1. 2. 3. Rotate the rotary switch to position. Plug the test probes into the COM and V/ terminals. Connect the test leads to the diode you want to check and note the meter reading.
Notes: · If the display indicates an overrange condition, reverse the polarity of the connection. · If the display shows a value, the device is good. The displayed value is the components actual forward voltage (up to 2.0 volts). · If the display still indicates an overrange condition, the device is open. · If the display shows a value both before and after you reverse the polarity, the device is shorted.
Manual Documentation Number M3640D1598
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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 & 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) · 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.
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 & PC interface. · For the most accurate measurement, we strongly recommend you to use the type of BNC cable.
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Manual Documentation Number M3640D1598
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6-7. Measuring Capacitance
Follow these steps to measure capacitance normal: 1. 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. Set the rotary switch to either Lo or Hi of CAP range. Lo: nF 2/20/200 High: µF 2/20/200 3. Insert the discharged capacitor into the CAP + and - clips connector. Your meter displays the capacitance value.
Notes: · For polarized capacitors, be sure to insert the negative lead in the -- (minus) clip. · 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 & 20 V AC range. 2. Connect the meter in parallel with the load or circuit.
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Notes: · dB(decibels) in the display indicates the Logarithmic ratio of input voltage to the standard stored value. · During activation of dB measurement, the auto power off will not work. Table 4. Logorithmic ratio INPUT VOLTAGE 0.075 mV 109 mV 1.94 V 19.40 V DB -60 dB -17 dB 8 dB 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.
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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 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 mode. Temperature from -40°C to 1200°C can be measured by using optional K-type thermocouple at TEMP position.
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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 rotary switch to the HIGH/LOW range. 2. Plug the test leads into the COM and V/ 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. · If value is between stored reference value, ··· segment appears.
Notes: · In this mode, the 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 0V up to 19.99V
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Manual Documentation Number M3640D1598
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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 and the computer's serial port, as shown.
2. 3.
Press ON/OFF to turn on the meter. 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 \ md METER 3. Make the directory you created the current directory. For example, if the directory is METER, type: cd\METER 4. Copy the files from the GRAPHIC subdirectory on the floppy drive to your hard disk. For example, type: Manual Documentation Number M3640D1598
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5.
copy a: \ GRAPHIC c: To run the program, type METEX . Follow the on-screen help for specific operating instructions.
Notes: · 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 . · To stop the program or to escape from a device I/O error, press .
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 (If you placed the diskette in Drive A) b:\scope\setup (If you placed the diskette in Drive B) 5. Follow the on-screen prompts to complete installation. 6. To run 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
· · · · Transmission rate: 1200 baud Character coding 7-bit ASCII Parity None Stop Bits: 2
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Data Format
The data format consists of a frame of 14 bytes. The frames are set as follows: BYTE) Example 1) Example 2) 123456789ABCDE D C --1 . 9 9 9 V CR 1 . 9 9 9 Mohm CR
Connection of MT/RS - 232C cable to the meter.
The following program is an example of a BASIC program that gets a single reading from the meter: 10 20 30 40 50 60 70 OPEN"COM1: 1200, N, 7, 2, RS, CS, DS, CD" AS #2 A$ = "D" PRINT #2, A$ IN$=INPUT$ (14, #2) PRINT IN$ CLOSE #2 END
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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 OF THE SPECIFIED VOLTAGE AND CURRENT RATINGS. Follow these steps to replace the fuse: 1. 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.
3. Remove the blown fuse.
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.
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Manual Documentation Number M3640D1598
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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. Keep your meter dry. If it does get wet, wipe it dry immediately. Liquids might contain minerals that can corrode the electronic circuits. 2. 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. 3. Handle your meter gently and carefully. Dropping it can damage circuit boards and cases and cause the meter to work improperly. 4. Keep your meter away from dust and dirt, which can cause premature wear of parts. 5. Wipe your meter with a damp cloth occasionally to keep it looking new. Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the meter. 6. 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.
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8. SPECIFICATIONS
8-1. General Characteristics
· · · · · · · · · · Max Display........................ 1999 Counts (3½ Digit) with automatic polarity indication Max Input Current of AC & DC ................................................................................ 20A Reading Time................................................................................1-2 reading per second Operating Temperature ..........................................................0°C to 40° (32°F to 104°F) Storage Temperature ........................................................-10°C to 50°C (14°F to 122°F) Temperature for Guaranteed Accuracy....................................................... + 23°C ± 5°C Battery type ..........................................................................NEDA 1604 9V or 6F22 9V Size (H x W x L) .......................................................................................84x187x34mm Net weight ................................................................... 305g±10g (Including 9V Battery) Supplied Accessories: ......................................................................... Operating Manual, pair of Test Leads, Spare Fuse, 9V Battery. · Optional Accessories: .............................................................................. Carrying Case, Interface Cable MT/RS-232C, Floppy disc with software, K-type thermocouples.
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8-2 Special Characteristics
MODEL M-3610D M-3630D M-3650D FUNCTION RANGE 200 mV 2V 20V 200V 1000 V 200 mV 2V 20 V 200 V 750 V 200 2 K 20 K 200 K 2 M 20 M * 2000 M ACCURACY ±0.3% of rdg +1 dgt RESOLUTION 100 uV 1 mV 10 mV 100 mV 1V 100 uV 1 mV 10 mV 100 mV 1V 0.1 1 10 100 1 K 10 K 1 M
DC VOLTAGE
±0.5% of rdg +1 dgt ±0.8% of rdg +3 dgts
AC VOLTAGE
±1.2% of rdg +3 dgts ±0.5% of rdg +3 dgts
RESISTANCE
±1.0% of rdg +2 dgts ±5.0% of rdg +5 dgts
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MODEL M-3610D M-3630D M-3650D
FUNCTION
DC CURRENT
AC CURRENT
RANGE 200 uA 2 mA 20 mA 200 mA 20 A 200 uA 2 mA 20 mA 200 mA 20 A
ACCURACY ±0.5% of rdg +1 dgt
±1.2% of rdg +1 dgt ±2.0% of rdg +5 dgt ±1.0% of rdg +3 dgts
±1.8% of rdg +5 dgts ±3.0% of rdg +5 dgts
RESOLUTION 0.1 uA 1 uA 10 uA 100 uA 100 mA 0.1 uA 1 uA 10 uA 100 uA 10 mA
Notes: 1. DC/AC Current 20 mA Not available in M-3610D
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MODEL M-3610D M-3630D M-3650D
FUNCTION
FREQUENCY
CAPACITANCE
RANGE 2 KHz 20 KHz 200 KHz 1 MHz * 2 MHz * 20 MHz LOW 2 nF 20 nF 200 nF HIGH 2 uF 20 uF 200 uF
ACCURACY ±1.0% of rdg +1 dgt
±1.0% of rdg +1 dgt ±1.0% of rdg +1 dgt ±2.0% of rdg +10 dgts ±2.0% of rdg +3 dgts ±3.0% of rdg +10 dgts ±3.0% of rdg +5 dgts ±4.0% of rdg +5 dgts
RESOLUTION 1 Hz 10 Hz 100 Hz 1 KHz 1 KHz 10 KHz 1 pF 10 pF 100 pF 1 nF 10 nF 100 nF
DIODE
Measures forward resistance of a semiconductor junction in K a test current of 1 mA.
Notes: 1. FREQUENCY: *Not available in M-3610D & M630D. 2. CAPACITANCE: Not available in M-3610D.
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8-2. Special Characteristics
MODEL M-3640D M-3660D FUNCTION RANGE 200 mV 2V 20V 200V 100 V 200 mV 2V 20 V 200 V 750 V 200 2 K 20 K 200 K 2 M 20 M ACCURACY ±0.3% of rdg +1 dgt RESOLUTION 100 uV 1 mV 10 mV 100 mV 1V 100 uV 1 mV 10 mV 100 mV 1V 0.1 1 10 100 1 K 10 K
DC VOLTAGE
AC VOLTAGE (True rms)
±0.5% of rdg +1 dgt ±0.8% of rdg +3 dgts ±2.5% of rdg +5 dgts
±1.5% of rdg +3 dgts ±0.5% of rdg +3 dgts
RESISTANCE
±1.0% of rdg +2 dgts Notes: AC Voltage (True rms) 1. The nominated accuracy is guaranteed when the input value is full-scale basis. 2. Frequency for accuracy · 40 Hz to 20 KHz for 200 mV, 2V, 20V & 200V. · 40 Hz to 400 Hz for 750 V.
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MODEL M-3640D M-3660D
FUNCTION
RANGE 2 mA
ACCURACY ±0.5% of rdg +1 dgt
DC CURRENT 200 mA 20 A 2 mA AC CURRENT 200 mA 20 A -40°C~200°C 200°C~1200°C 200 mV 20 V ±1.8% of rdg +5 dgts ±3.0% of rdg +5 dgts ±3.0% of rdg +5 dgts ±3.0% of rdg +2 dgts ±3.0% of rdg +5 dgts ±1.2% of rdg +1 dgt ±2.0% of rdg +5 dgts ±1.0% of rdg +3 dgts
TEMPERATURE dB
RESOLUTION 0.1 uA 1 uA 10 uA 100 uA 100 mA 0.1 uA 1 uA 10 uA 100 uA 10 mA 1°C 0.1 dB
Notes: AC Current Frequency for accuracy · 40 Hz to 10 KHz for 2 mA & 200 mA ranges. · 40 Hz to 1 KHz for 20A range.
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MODEL M-3640D M-3660D
FUNCTION
FREQUENCY
CAPACITANCE
RANGE 2 KHz 20 KHz 200 KHz 1 MHz * 2 MHz * 20 MHz LOW 2 nF 20 nF 200 nF HIGH 2 uF 20 uF 200 uF
ACCURACY ±1.0% of rdg +1 dgt
±1.0% of rdg +1 dgt ±1.0% of rdg +1 dgt ±2.0% of rdg +10 dgts ±2.0% of rdg +3 dgts ±3.0% of rdg +10 dgts ±3.0% of rdg +5 dgts ±4.0% of rdg +5 dgts
RESOLUTION 1 Hz 10 Hz 100 Hz 1 KHz 1 KHz 10 KHz 1 pF 10 pF 100 pF 1 nF 10 nF 100 nF
DIODE
Measures forward resistance of a semiconductor junction in K a test current of 1 mA.
Note: FREQUENCY: *Not available in M-3640D.
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Manual Documentation Number M3640D1598
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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 M3640D1598
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