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12 Multimeter

Users Manual

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Recording Minimum and Maximum Reading with Elapsed Time............. 19

Capturing Continuity Intermittents with Continuity Capture

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.................. 21

TURNING BEEPER OFF............................................................................ 23

MAINTENANCE.......................................................................................... 23

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Replacing the Battery........................................................................ 23

Replacing the Test Leads........................................................................ 23

Service and Parts .................................................................................... 24

Accessories............................................................................................. 24

SPECIFICATIONS ...................................................................................... 24

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Summary of Contents for 12

Page 1: ... PN 2063508 January 2003 Rev 1 9 04 2003 2004 Fluke Corporation All rights reserved Printed in China All product names are trademarks of their respective companies 12 Multimeter Users Manual ...

Page 2: ......

Page 3: ...NDBY MODE 5 INPUT RANGES 5 Autoranging 6 Manually Selecting a Range 6 MEASURING VOLTAGE 7 TESTING CONTINUITY AND MEASURING RESISTANCE 9 TESTING DIODES 11 VCHEK AND HOW TO USE IT 13 DISABLING i WITH FUNCTION LOCK 14 MEASURING CAPACITANCE 15 USING MIN MAX FUNCTIONS 17 Recording Minimum and Maximum Readings 17 ...

Page 4: ... and Maximum Reading with Elapsed Time 19 Capturing Continuity Intermittents with Continuity Capture 21 TURNING BEEPER OFF 23 MAINTENANCE 23 N Replacing the Battery 23 Replacing the Test Leads 23 Service and Parts 24 Accessories 24 SPECIFICATIONS 24 ...

Page 5: ...ce the battery as soon as the battery indicator N appears Do not use the meter if the meter or test leads look damaged or if you suspect that the meter is not operating properly Turn off power to the circuit under test before cutting unsoldering or breaking the circuit Small amounts of current can be dangerous Do not apply more than 600 V rms between a terminal and earth ground Use caution when wo...

Page 6: ...Manual 2 SYMBOLS The following international electrical symbols are used in this manual W Important Safety Information in Manual Not Applicable to Identified Model B AC F DC G Diode E Capacitor J Ground T Double Insulation ...

Page 7: ...12 Multimeter DISPLAY 3 DISPLAY Figure 1 Display ...

Page 8: ...12 Multimeter Users Manual 4 OPERATING FEATURES Figure 2 Operating Features ...

Page 9: ...n 45 minutes Press any pushbutton to resume operation Standby is not allowed if the meter is in the MIN MAX mode INPUT RANGES The input range determines the highest value the meter will measure Most functions have more than one range see SPECIFICATIONS If the range is too low the display shows OL overload If the range is too high the display will show fewer digits of resolution ...

Page 10: ...range you select and lock the meter in a range To manually select a range 1 Press V The meter is locked in the range it is in and V is displayed In manual range i is disabled 2 Press V to step through the ranges NOTE The 4000 mV range which can only be entered in manual range is convenient when using accessories 3 To return to autorange press V for 2 seconds until V is no longer displayed or chang...

Page 11: ...he meter beeps an Overload Alert when OL overload is displayed In manual range you can toggle the meter between a high or low input impedance mode by moving the slide switch between the voltage and continuity ohms positions See i AND HOW TO USE IT In the continuity ohms position the input impedance of the meter is 2 kΩ and LoZ is displayed to indicate that the meter is in the low input impedance m...

Page 12: ...12 Multimeter Users Manual 8 Figure 3 Measuring Voltage ...

Page 13: ...ress g 3 Touch the probes to the test points 4 In ohms read the resistance on the display In continuity test the beeper sounds continuously if continuity exists resistance 25 Ω Opens and shorts longer than 250 µs are detected On the Fluke 12 short to open and open to short transitions can be captured and visually displayed See Capturing Continuity Intermittents If the meter detects a voltage great...

Page 14: ...12 Multimeter Users Manual 10 Figure 4 Continuity and Resistance Measurements ...

Page 15: ...diode function To toggle the beeper on or off in continuity diode test press V R is displayed when the beeper is enabled 3 Touch probes to the diode Figure 5A A forward voltage drop of about 0 6 V typical for a silicon diode causes the meter to beep once 4 Reverse probes Figure 5B If the diode is good OL is displayed If the diode is shorted Figure 5C the beeper sounds continuously in at least one ...

Page 16: ...12 Multimeter Users Manual 12 Figure 5 Testing Diodes ...

Page 17: ...the following The manual range mode i e Z is displayed The MIN MAX mode i e j is displayed The capacitance function i e µF is displayed WWarning Repetitive transients on a dc bus will cause i to select ac volts even though a hazardous dc voltage may be present To avoid a misleading display and possible electric shock manually select the proper volts function for measurements on these circuits In i...

Page 18: ...unction and disable i 1 Put the slide switch in the continuity ohms position The meter selects the continuity diode or ohms function Press g to toggle between the continuity diode and ohms functions 2 Press Z to put the meter in manual range Z is displayed The meter is locked in the selected function and i is disabled In continuity diode test press Z to toggle the beeper on and off In ohms press Z...

Page 19: ...The capacitance function is selected and µF is displayed 3 Touch the probes to the capacitor When measuring polarized capacitors be sure to connect the positive to and the negative to COM Capacitor dielectric absorption can cause measurement errors If more discharge is necessary the meter displays dISC while the capacitor is discharging To exit capacitance press E or g or move the slide switch to ...

Page 20: ...12 Multimeter Users Manual 16 Figure 6 Measuring Capacitance ...

Page 21: ...st leads and put the meter in volts or ohms 2 Connect the leads to the circuit 3 Press j to enter MIN MAX j is displayed and autorange is disabled When the reading changes more than about 50 digits the meter beeps a short Input Change Alert When a new minimum or maximum is recorded the meter beeps a longer MIN MAX Alert 4 Press j to cycle through maximum minimum and present readings see Figure 7 T...

Page 22: ...12 Multimeter Users Manual 18 Figure 7 Displaying Minimum and Maximum Reading ...

Page 23: ...9 OL is displayed for longer times 1 To enable the MIN MAX elapsed time clock hold j down while moving the slide switch from OFF to the volts or continuity ohms position 2 Insert the test leads and put the meter in volts or ohms 3 Connect the leads to the circuit 4 Press j to select MIN MAX j is displayed and time is set to 00 00 5 Press j to step through the display sequence shown in Figure 8 6 T...

Page 24: ...12 Multimeter Users Manual 20 Figure 8 Maximum and Minimum Reading with Elapsed Time ...

Page 25: ...ty ohms position 2 Connect the leads to the circuit 3 Press j The display shows the initial condition either an open or short as shown in Figure 9 and j is displayed If the meter detects a transition it beeps and the display captures the transition see Figure 9 Subsequent transitions cause the meter to beep but the display does not change 4 Press j to reset the display to the present condition and...

Page 26: ...12 Multimeter Users Manual 22 Figure 9 Open to Short and Short to Open Transitions ...

Page 27: ...ads and any input signals before opening the case Periodically wipe the case with a damp cloth and detergent Do not use abrasives or solvents N Replacing the Battery The meter uses a 9 V battery NEDA 1604 or IEC 6F22 To replace the battery remove the four screws from the back of the meter and lift off the front Remove the battery from case bottom Replacing the Test Leads The meter uses double insu...

Page 28: ...ge for ease of reading SPECIFICATIONS This meter complies with Part 15 of FCC Rules Operation is subject to the following conditions 1 This meter may not cause harmful interference and 2 this meter must accept any interference received including interference that may cause undesired operation Accuracy is specified for a period of one year after calibration at 18 C to 28 C 64 F to 82 F with relativ...

Page 29: ...to 90 10 C to 35 C 0 to 70 35 C to 50 C Battery Type 9 V NEDA 1604 or IEC 6F22 Battery Life 650 continuous hours with alkaline 450 continuous hours with carbon zinc Shock Vibration 1 meter shock Per MIL T 28800D for a Class 3 Instrument Size HxWxL 1 35 in x 2 75 in x 5 55 in 3 46 cm x 7 05 cm x 14 23 cm Weight 10 oz 286 g Safety Designed to Protection Class II requirement of UL 3111 ANSI ISA S82 C...

Page 30: ... Ω 0 9 2 4 000 kΩ 0 001 kΩ 0 9 l 40 00 kΩ 0 01 kΩ 0 9 1 400 0 kΩ 0 1 kΩ 0 9 1 4 000 MΩ 0 001 MΩ 0 9 1 40 00 MΩ 0 01 MΩ 1 5 3 E 1 000 µF 0 001 µF 1 9 2 10 00 µF 0 01 µF 1 9 2 100 0 µF 0 1 µF 1 9 2 10000 µF 1 0 µF 1000 µF 1 9 2 1000 µF 10 90 Typical MG 2 000 V 0 001 V 0 9 2 The 4000 mV range can only be entered in manual range mode Use the 4000 mV range with accessories The beeper is guaranteed to c...

Page 31: ...MΩ 40 MΩ Current 600 V rms 1 5 V dc 450 mV dc 1 5 V dc 500 µA G 600 V rms 2 4 3 0 V dc 2 400 V dc 0 95 mA Typical 3 x 106 V Hz Maximum 2 kΩ with input voltage up to 50 V Impedance will increase with input voltage to 300 kΩ at 600 V MIN MAX Recording Accuracy and Response Time Specified accuracy of measurement function 12 digits for changes 200 ms in duration 40 digits in ac Typical 100 ms response...

Page 32: ...12 Multimeter Users Manual 28 ...

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