User manual FLUKE 80 V

99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com ® 80 Series V Multimeters Users Manual May 2004 Rev. 1, 8/04 2004 Fluke Corporation, All rights reserved. All product names are trademarks of their respective companies. Table of Contents Title Introduction......................................................................................................................... Contacting Fluke ................................................................................................................ Safety Information .............................................................................................................. The Meter's Features ......................................................................................................... Power-Up Options ......................................................................................................... Automatic Power-Off ..................................................................................................... Input Alert Feature ...................................................................................................... Making Measurements....................................................................................................... Measuring AC and DC Voltage ..................................................................................... Zero Input Behavior of True RMS Meters (87).............................................................. Low Pass Filter (87) ...................................................................................................... Measuring Temperature (87) ........................................................................................ Testing for Continuity .................................................................................................... Measuring Resistance................................................................................................... Using Conductance for High Resistance or Leakage Tests ......................................... Measuring Capacitance................................................................................................. Testing Diodes .............................................................................................................. Page 1 1 2 6 13 13 13 13 13 15 15 16 16 18 20 21 22 i 80 Series V Users Manual Measuring AC or DC Current........................................................................................ Measuring Frequency ................................................................................................... Measuring Duty Cycle................................................................................................... Determining Pulse Width .............................................................................................. Bar Graph........................................................................................................................... Zoom Mode (Power Up Option Only) ........................................................................... Uses for the Zoom Mode............................................................................................... HiRes Mode (Model 87) ..................................................................................................... MIN MAX Recording Mode ................................................................................................ Smooth Feature (Power Up Option Only).......................................................................... AutoHOLD Mode................................................................................................................ Relative Mode .................................................................................................................... Maintenance....................................................................................................................... General Maintenance.................................................................................................... Fuse Test ...................................................................................................................... Replacing the Battery.................................................................................................... Replacing the Fuses ..................................................................................................... Service and Parts............................................................................................................... Specifications ..................................................................................................................... Detailed Specifications.................................................................................................. 24 27 29 30 30 31 31 31 32 32 34 34 35 35 35 36 37 37 43 44 ii List of Tables Table 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. Title Electrical Symbols ..................................................................................................................... Inputs ......................................................................................................................................... Rotary Switch Positions............................................................................................................. Pushbuttons............................................................................................................................... Display Features........................................................................................................................ Functions and Trigger Levels for Frequency Measurements.................................................... MIN MAX Functions................................................................................................................... Replacement Parts .................................................................................................................... Accessories ............................................................................................................................... Model 87 AC Voltage Function Specifications .......................................................................... Model 83 AC Voltage Function Specifications .......................................................................... DC Voltage, Resistance, and Conductance Function Specifications........................................ Temperature Specifications (87 Only)....................................................................................... Current Function Specifications ................................................................................................ Capacitance and Diode Function Specifications ....................................................................... Frequency Counter Specifications ............................................................................................ Frequency Counter Sensitivity and Trigger Levels ................................................................... Electrical Characteristics of the Terminals................................................................................ MIN MAX Recording Specifications .......................................................................................... Page 5 6 7 8 11 28 33 39 42 44 45 46 47 48 49 49 50 51 52 iii List of Figures Figure 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Title Display Features (Model 87) ..................................................................................................... Measuring AC and DC Voltage ................................................................................................. Low Pass Filter .......................................................................................................................... Testing for Continuity................................................................................................................. Measuring Resistance ............................................................................................................... Measuring Capacitance............................................................................................................. Testing a Diode.......................................................................................................................... Measuring Current..................................................................................................................... Components of Duty Cycle Measurements............................................................................... Testing the Current Fuses ......................................................................................................... Battery and Fuse Replacement ................................................................................................. Replaceable Parts ..................................................................................................................... Page 11 14 15 17 19 21 23 25 29 36 38 41 v Introduction Introduction XWWarning Read "Safety Information" before you use the Meter. Except where noted, the descriptions and instructions in this manual apply to Series V Models 83 and 87 multimeters (hereafter referred to as "the Meter"). Model 87 appears in all illustrations. 1 80 Series V Users Manual Safety Information The Meter complies with: · · · · · · EN61010-1:2001 ANSI/ISA S82.01-2004 CAN/CSA C22.2 No. 1010.1:2004 UL610101-1 Measurement Category III, 1000V, Pollution Degree 2 Measurement Category IV, 600V, Pollution Degree 2 · XWWarning To avoid possible electric shock or personal injury, follow these guidelines: Use this Meter only as specified in this manual or the protection provided by the Meter might be impaired. Do not use the Meter if it is damaged. Before you use the Meter, inspect the case. Look for cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors. Make sure the battery door is closed and latched before operating the Meter. Replace the battery as soon as the battery indicator (M) appears. Remove test leads from the Meter before opening the battery door. · In this manual, a Warning identifies conditions and actions that pose hazards to the user. A Caution identifies conditions and actions that may damage the Meter or the equipment under test. Electrical symbols used on the Meter and in this manual are explained in Table 1. · · · Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 2 FAX 781.665.0780 - TestEquipmentDepot.com Safety Information · Inspect the test leads for damaged insulation or exposed metal. Check the test leads for continuity. Replace damaged test leads before you use the Meter. Do not apply more than the rated voltage, as marked on the Meter, between the terminals or between any terminal and earth ground. Never operate the Meter with the cover removed or the case open. Use caution when working with voltages above 30 V ac rms, 42 V ac peak, or 60 V dc. These voltages pose a shock hazard. Use only the replacement fuses specified by the manual. Use the proper terminals, function, and range for measurements. Avoid working alone. When measuring current, turn off circuit power before connecting the Meter in the circuit. Remember to place the Meter in series with the circuit. · When making electrical connections, connect the common test lead before connecting the live test lead; when disconnecting, disconnect the live test lead before disconnecting the common test lead. Do not use the Meter if it operates abnormally. Protection may be impaired. When in doubt, have the Meter serviced. Do not operate the Meter around explosive gas, vapor, or dust. Use only a single 9 V battery, properly installed in the Meter case, to power the Meter. When servicing the Meter, use only specified replacement parts. When using probes, keep fingers behind the finger guards on the probes. Do not use the Low Pass Filter option to verify the presence of hazardous voltages. Voltages greater than what is indicated may be present. First, make a voltage measurement without the filter to detect the possible presence of hazardous voltage. Then select the filter function. · · · · · · · · · · · · · 3 80 Series V Users Manual WCaution To avoid possible damage to the Meter or to the equipment under test, follow these guidelines: · Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, or capacitance. · · Use the proper terminals, function, and range for all measurements. Before measuring current, check the Meter's fuses. (See "Fuse Test".) 4 Safety Information Table 1. Electrical Symbols B F X W M R AC (Alternating Current) DC (Direct Current) Hazardous voltage Risk of Danger. Important information. See Manual. Battery. Low battery when displayed. Continuity test or continuity beeper tone. IEC Overvoltage Category III CAT III equipment is designed to protect against transients in equipment in fixedequipment installations, such as distribution panels, feeders and short branch circuits, and lighting systems in large buildings. Underwriters Laboratories J I P $ T E Earth ground Fuse Conforms to European Union directives. Conforms to relevant Canadian Standards Association directives. Double insulated Capacitance IEC Overvoltage Category IV CAT IV equipment is designed to protect against transients from the primary supply level, such as an electricity meter or an overhead or underground utility service. CAT III CAT IV t G Diode s Inspected and licensed by TÜV Product Services. 5 80 Series V Users Manual The Meter's Features Tables 2 through 5 briefly describe the Meter's features. Table 2. Inputs Terminal Description Input for 0 A to 10.00 A current (20 A overload for 30 seconds maximum), current frequency, and duty cycle measurements. Input for 0 µA to 400 mA current measurements (600 mA for 18 hrs.) and current frequency and duty cycle. Return terminal for all measurements. Input for voltage, continuity, resistance, diode, capacitance, frequency, temperature (87), and duty cycle measurements. A mA µA COM I 6 The Meter's Features Table 3. Rotary Switch Positions Switch Position Any Position Function When the Meter is turned on, the Meter model number briefly appears on the display. AC voltage measurement Press A for low pass filter (K) (87 only). DC voltage measurement 600 mV dc voltage range Press A for temperature J L M N (T) (87 only). Press E for continuity test. e Resistance measurement Press A for capacitance measurement. O Diode test AC current measurements from 0 mA to 10.00 A Press A for dc current measurements, from 0 mA to 10.00 A. AC current measurements from 0 µA to 6000 µA Press A for dc current measurements from 0 µA to 6000 µA. P Q 7 80 Series V Users Manual Table 4. Pushbuttons Button Switch Positon N Selects capacitance Selects temperature (87 only) Selects ac low pass filter function (87 only) Switches between dc and ac current Switches between dc and ac current Disables automatic power-off feature (Meter normally powers off in 30 minutes). The Meter reads "PoFF" until A is released. Starts recording of minimum and maximum values. Steps the display through MAX, MIN, AVG (average), and present readings. Cancels MIN MAX (hold for 1 second) Enables the Meter's calibration mode and prompts for a password. The Meter reads "CAL" and enters calibration mode. See 80 Series V Service Information. Switches between the ranges available for the selected function. To return to autoranging, hold the button down for 1 second. Switches between °C and °F. Enables the Meter's smoothing feature. The Meter reads "5___" until C is released. Function A (Yellow) M J P Q Power-up B Any switch position Power-up Any switch position C M Power-up 8 The Meter's Features Table 4. Pushbuttons (cont.) Button Switch Positon Any switch position MIN MAX recording Frequency counter Power-up Any switch position Function AutoHOLD (formerly TouchHold) captures the present reading on the display. When a new, stable reading is detected, the Meter beeps and displays the new reading. Stops and starts recording without erasing recorded values. Stops and starts the frequency counter. Turns on all LCD segments. Turns the backlight on, makes it brighter, and turns it off. For Model 87, hold H down for one second to enter the HiRes digit mode. The "HiRes" icon appears on the display. To return to the 3-1/2 digit mode, hold H down for one second. HiRes=19,999 Turns the continuity beeper on and off Switches between Peak (250 µs) and Normal (100 ms) response times. Toggles the meter to trigger on positive or negative slope. Disables the beeper for all functions. The Meter reads "bEEP" until E is released. D H E Continuity ReE MIN MAX recording Hz, Duty Cycle Power-up 9 80 Series V Users Manual Table 4. Pushbuttons (cont.) Button Switch Positon Any switch position Power-up Function Stores the present reading as a reference for subsequent readings. The display is zeroed, and the stored reading is subtracted from all subsequent readings. Enables zoom mode for the bar graph. The Meter reads "2rEL" until F is released. Press F (Relative mode) G Any switch position except diode test Power-up G for frequency measurements. Starts the frequency counter. Press again to enter duty cycle mode. Enables the Meter's high impedance mode when the mV dc function is used. The Meter reads "Hi2" until G is released. 10 The Meter's Features Number Feature Indication Indicates negative readings. In relative mode, this sign indicates that the present input is less than the stored reference. Indicates the presence of a high voltage input. Appears if the input voltage is 30 V or greater (ac or dc). Also appears in low pass filter mode. Also appears in cal, Hz, and duty cycle modes. AutoHOLD is active. Display Hold is active. Indicates the Meter is in Peak Min Max mode and the response time is 250 µs (87 only). E Z RS S p F G aom1_af.eps H I Figure 1. Display Features (Model 87) Table 5. Display Features Number Feature Indication Polarity indicator for the analog bar graph. Positive or negative slope indicator for Hz/duty cycle triggering. The continuity beeper is on. Relative (REL) mode is active. Smoothing is active. Y A Trig J m Indicators for minimum-maximum MAX recording mode. MIN AVG K Low pass filter mode (87 only). See "Low Pass Filter (87). The battery is low. XWWarning: To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator appears. Y B C D K X W g L b 11 80 Series V Users Manual Table 5. Display Features (cont.) Number Feature A, µA, mA V, mV µF, nF nS % e, Me, ke Hz, kHz AC DC Indication Amperes (amps), Microamp, Milliamp Volts, Millivolts Microfarad, Nanofarad Nanosiemens Percent. Used for duty cycle measurements. Ohm, Megohm, Kilohm Hertz, Kilohertz Alternating current, direct current Degrees Celsius, Degrees Fahrenheit Displays selected range The Meter is in high resolution (Hi Res) mode. HiRes=19,999 The Meter is in autorange mode and automatically selects the range with the best resolution. The Meter is in manual range mode. bAtt diSC EEPr Err CAL Err LEAd Number Feature Indication The number of segments is relative to the full-scale value of the selected range. In normal operation 0 (zero) is on the left. The polarity indicator at the left of the graph indicates the polarity of the input. The graph does not operate with the capacitance, frequency counter functions, temperature, or peak min max. For more information, see "Bar Graph". The bar graph also has a zoom function, as described under "Zoom Mode". M R -- 0L Overload condition is detected. N O P °C, °F 610000 mV HiRes Auto Error Messages Replace the battery immediately. In the capacitance function, too much electrical charge is present on the capacitor being tested. Invalid EEPROM data. Have Meter serviced. Invalid calibration data. Calibrate Meter. WTest lead alert. Displayed when the test leads are in the A or mA/µA terminal and the selected rotary switch position does not correspond to the terminal being used. Q Manual 12 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 FAX 781.665.0780 - TestEquipmentDepot.com Making Measurements Power-Up Options Holding a button down while turning the Meter on activates a power-up option. Table 4 includes the power-up options. W Caution Placing the probes across (in parallel with) a powered circuit when a lead is plugged into a current terminal can damage the circuit you are testing and blow the Meter's fuse. This can happen because the resistance through the Meter's current terminals is very low, so the Meter acts like a short circuit. Automatic Power-Off The Meter automatically turns off if you do not turn the rotary switch or press a button for 30 minutes. If MIN MAX Recording is enabled, the Meter will not power off. To disable automatic power-off, refer to Table 4. Input Alert Feature If a test lead is plugged into the mA/µA or A terminal, but the rotary switch is not set to the correct current position, the beeper warns you by making a chirping sound and the display flashes "LEAd". This warning is intended to stop you from attempting to measure voltage, continuity, resistance, capacitance, or diode values when the leads are plugged into a current terminal. Making Measurements The following sections describe how to take measurements with the Meter. Measuring AC and DC Voltage Model 87 features true rms readings, which are accurate for distorted sine waves and other waveforms (with no dc offset) such as square waves, triangle waves, and staircase waves. The Meter's voltage ranges are 600.0 mV, 6.000 V, 60.00 V, 600.0 V, and 1000 V. To select the 600.0 mV dc range, turn the rotary switch to mV. To measure ac or dc voltage, refer to Figure 2. 13 80 Series V Users Manual When measuring voltage, the Meter acts approximately like a 10 M (10,000,000 ) impedance in parallel with the circuit. This loading effect can cause measurement errors in high-impedance circuits. In most cases, the error is negligible (0.1% or less) if the circuit impedance is 10 k (10,000 ) or less. For better accuracy when measuring the dc offset of an ac voltage, measure the ac voltage first. Note the ac voltage range, then manually select a dc voltage range equal to or higher than the ac range. This procedure improves the accuracy of the dc measurement by ensuring that the input protection circuits are not activated. AC Voltage 87 V TRUE RMS MULTIMETER °C/°F MIN MAX Peak MIN MAX REL Hz % RANGE AutoHOLD 4½ DIGITS 1 Second mV V mA A Switch Box A V LO V OFF A mA A COM V 10A MAX FUSED 400mA FUSED DC Voltage 87 V TRUE RMS MULTIMETER mV 4½ DIGITS 1 Second °C/°F MIN MAX Peak MIN MAX REL Hz % RANGE AutoHOLD mV V LO V mA A V OFF A A mA A COM V + aom2f.eps 10A MAX FUSED 400mA FUSED Figure 2. Measuring AC and DC Voltage 14 Making Measurements Zero Input Behavior of True RMS Meters (87) True Rms Meters accurately measure distorted waveforms, but when the input leads are shorted together in the AC functions, the meter displays a residual reading between 1 and 30 counts. When the test leads are open, the display readings may fluctuate due to interference. These offset readings are normal. They do not affect the Meter's AC measurement accuracy over the specified measurement ranges. Unspecified input levels are: · · · AC voltage: below 3 % of 600 mV AC, or 18 mV AC AC current: below 3 % of 60 mA AC, or 1.8 mA AC AC current: below 3 % of 600 µA AC, or 18 µA AC XWWarning To avoid possible electric shock or personal injury, do not use the Low Pass Filter option to verify the presence of hazardous voltages. Voltages greater than what is indicated may be present. First, make a voltage measurement without the filter to detect the possible presence of hazardous voltage. Then, select the filter function. Note In Low Pass Mode, the Meter goes to manual mode. Select ranges by pressing the RANGE button. Autoranging is not available in Low Pass Mode. 1 kHz Low Pass Filter (87) The 87 is equipped with an ac low pass filter. When measuring ac voltage or ac frequency, press A to activate the low pass filter mode (K). The Meter continues measuring in the chosen ac mode, but now the signal diverts through a filter that blocks unwanted voltages above 1 kHz, refer to Figure 3. The lower frequency voltages pass with reduced accuracy to the measurement below 1 kHz. The low pass filter can improve measurement performance on composite sine waves that are typically generated by inverters and variable frequency motor drives. 100 Hz aom11f.eps Figure 3. Low Pass Filter 15 80 Series V Users Manual Measuring Temperature (87) The Meter measures the temperature of a type-K thermocouple (included). Choose between degrees Celsius (°C) or degrees Fahrenheit (°F) by pushing C. W Caution To avoid possible damage to the Meter or other equipment, remember that while the Meter is rated for ­200.0 °C to +1090.0 °C and ­328.0 °F to 1994.0 °F, the included K-Type Thermocouple is rated to 260 °C. For temperatures out of that range, use a higher rated thermocouple. Display ranges are ­200.0 °C to +1090.0 °C and ­328.0 °F to 1994.0 °F. Readings outside of these ranges show OL on the Meter display. When there is no thermocouple connected, the display also reads OL. To measure temperature, do the following: 1. 2. 3. 4. Connect a type-K thermocouple to the Meter's COM and dV eG terminals. Turn the rotary switch to M. Press A to enter temperature mode. Push C to choose Celsius or Fahrenheit. Testing for Continuity WCaution To avoid possible damage to the Meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before testing for continuity. The continuity test features a beeper that sounds as long as a circuit is complete. The beeper allows you to perform quick continuity tests without having to watch the display. To test for continuity, set up the Meter as shown in Figure 4. Press Eto turn the continuity beeper on or off. The continuity function detects intermittent opens and shorts lasting as little as 1ms. A brief short causes the Meter to emit a short beep. 16 Making Measurements For in-circuit tests, turn circuit power off. Activates continuity beeper 87 V TRUE RMS MULTIMETER 87 V TRUE RMS MULTIMETER °C/°F MIN MAX Peak MIN MAX REL Hz % RANGE AutoHOLD MIN MAX Peak MIN MAX °C/°F RANGE AutoHOLD REL Hz % 4½ DIGITS 1 Second 4½ DIGITS 1 Second mV V mA A V mV mA A LO V OFF A ON (closed) LO V OFF A OFF (open) A mA A COM V A mA A COM V 10A MAX FUSED 400mA FUSED 10A MAX FUSED 400mA FUSED aom4f.eps Figure 4. Testing for Continuity 17 80 Series V Users Manual Measuring Resistance WCaution To avoid possible damage to the Meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring resistance. The Meter measures resistance by sending a small current through the circuit. Because this current flows through all possible paths between the probes, the resistance reading represents the total resistance of all paths between the probes. The Meter's resistance ranges are 600.0 , 6.000 k, 60.00 k, 600.0 k, 6.000 M, and 50.00M. To measure resistance, set up the Meter as shown in Figure 5. The following are some tips for measuring resistance: · · The measured value of a resistor in a circuit is often different from the resistor's rated value. The test leads can add 0.1 to 0.2 of error to resistance measurements. To test the leads, touch the probe tips together and read the resistance of the leads. If necessary, you can use the relative (REL) mode to automatically subtract this value. The resistance function can produce enough voltage to forward-bias silicon diode or transistor junctions, causing them to conduct. If this is suspected, press C to apply a lower current in the next higher range. If the value is higher, use the higher value. Refer to Table 18. · 18 Making Measurements In-Circuit Resistance Measurements Circuit Power 87 V TRUE RMS MULTIMETER Isolating a Potentiometer OFF 1 32 Disconnect °C/°F MIN MAX Peak MIN MAX REL Hz % RANGE AutoHOLD 4½ DIGITS 1 Second mV V mA A 1 3 A 2 LO V OFF Isolating a Resistor mA A COM V A 10A MAX FUSED 400mA FUSED Disconnect aom6f.eps Figure 5. Measuring Resistance 19 80 Series V Users Manual Using Conductance for High Resistance or Leakage Tests Conductance, the inverse of resistance, is the ability of a circuit to pass current. High values of conductance correspond to low values of resistance. The Meter's 60 nS range measures conductance in nanosiemens (1 nS = 0.000000001 Siemens). Because such small amounts of conductance correspond to extremely high resistance, the nS range lets you determine the resistance of components up to 100,000 M, 1/1 nS = 1,000 M. To measure conductance, set up the Meter as shown for measuring resistance (Figure 5); then press Cuntil the nS indicator appears on the display. The following are some tips for measuring conductance: · High-resistance readings are susceptible to electrical noise. To smooth out most noisy readings, enter the MIN MAX recording mode; then step to the average (AVG) reading. There is normally a residual conductance reading with the test leads open. To ensure accurate readings, use the relative (REL) mode to subtract the residual value. · 20 Making Measurements Measuring Capacitance WCaution To avoid possible damage to the Meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring capacitance. Use the dc voltage function to confirm that the capacitor is discharged. The Meter's capacitance ranges are 10.00 nF, 100.0 nF, 1.000 µF, 10.00 µF, 100.0 µF, and 9999 µF. To measure capacitance, set up the Meter as shown in Figure 6. To improve the accuracy of measurements less than 1000 nF, use the relative (REL) mode to subtract the residual capacitance of the Meter and leads. Select Capacitance 4½ DIGITS 1 Second 87 V TRUE RMS MULTIMETER °C/°F MIN MAX Peak MIN MAX REL Hz % RANGE AutoHOLD mV V mA A LO V OFF A A mA A COM V 10A MAX FUSED 400mA FUSED Note If too much electrical charge is present on the capacitor being tested, the display shows "diSC". + + + + + + + + + aom10f.eps Figure 6. Measuring Capacitance 21 80 Series V Users Manual Testing Diodes WCaution To avoid possible damage to the Meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before testing diodes. Use the diode test to check diodes, transistors, silicon controlled rectifiers (SCRs), and other semiconductor devices. This function tests a semiconductor junction by sending a current through the junction, then measuring the junction's voltage drop. A good silicon junction drops between 0.5 V and 0.8 V. To test a diode out of a circuit, set up the Meter as shown in Figure 7. For forward-bias readings on any semiconductor component, place the red test lead on the component's positive terminal and place the black lead on the component's negative terminal. In a circuit, a good diode should still produce a forwardbias reading of 0.5 V to 0.8 V; however, the reverse-bias reading can vary depending on the resistance of other pathways between the probe tips. A short beep sounds if the diode is good (< .85 V). A continuous beep sounds if the reading is .100 V. This reading would indicate a short circuit. The display shows "OL" if the diode is open. 22 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 FAX 781.665.0780 - TestEquipmentDepot.com Making Measurements 87 V TRUE RMS MULTIMETER Forward Bias Typical Reading Reverse Bias 87 V TRUE RMS MULTIMETER + MIN MAX Peak MIN MAX + °C/°F RANGE AutoHOLD REL Hz % °C/°F MIN MAX Peak MIN MAX REL Hz % RANGE AutoHOLD mV V mA A V mV mA A LO V OFF A LO V OFF A Single Beep mA A COM V A A mA A COM V 10A MAX FUSED 400mA FUSED 10A MAX FUSED 400mA FUSED 87 V TRUE RMS MULTIMETER 87 V TRUE RMS MULTIMETER Shorted Bad Diode or Bad Diode °C/°F MIN MAX Peak MIN MAX REL Hz % RANGE AutoHOLD Open °C/°F MIN MAX Peak MIN MAX REL Hz % RANGE AutoHOLD mV V mA A V LO mV mA A V OFF A LO V OFF A A mA A COM V A mA A COM V 10A MAX FUSED 400mA FUSED 10A MAX FUSED 400mA FUSED aom9f.eps Figure 7. Testing a Diode 23 80 Series V Users Manual Measuring AC or DC Current XWWarning To avoid possible electric shock or personal injury, never attempt an in-circuit current measurement where the open-circuit potential to earth is greater than 1000 V. You may damage the Meter or be injured if the fuse blows during such a measurement. WCaution To avoid possible damage to the Meter or to the equipment under test: · · · Check the Meter's fuses before measuring current. Use the proper terminals, function, and range for all measurements. Never place the probes across (in parallel with) any circuit or component when the leads are plugged into the current terminals. The Meter's current ranges are 600.0 µA, 6000 µA, 60.00 mA, 400.0 mA, 6000 mA, and 10 A. AC current is displayed as an rms value. To measure current, refer to Figure 8 and proceed as follows: 1. 2. Turn off power to the circuit. Discharge all highvoltage capacitors. Insert the black lead into the COM terminal. For currents between 6 mA and 400 mA, insert the red lead into the mA/µA terminal. For currents above 400 mA, insert the red lead into the A terminal. Note To avoid blowing the Meter's 400 mA fuse, use the mA/µA terminal only if you are sure the current is less than 400 mA continuously or less than 600 mA for 18 hours or less. To measure current, you must break the circuit under test, then place the Meter in series with the circuit. 24 Making Measurements 1 Circuit Power: OFF to connect meter. ON for measurement. OFF to disconnect meter. Total current to circuit 87 V TRUE RMS MULTIMETER 4 °C/°F MIN MAX Peak MIN MAX REL Hz % RANGE AutoHOLD mA A A 3 5 4½ DIGITS 1 Second mV V mA A LO V OFF A 2 mA A COM V Current through one component A 10A MAX FUSED