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Model 187 & 189

1. ach006f eps Figure 3 9 Diode Test 3 14 Making Measurements 3 Measuring Temperature Measuring Temperature To measure temperature set up the meter as shown in Figure 3 10 The meter begins temperature measurement in the degree units last used Celsius C or Fahrenheit F Once you have selected the temperature function you can change units by pressing the blue button The meter remembers the units selected until they are changed The primary display shows either the temperature or the message UPEn for an open thermocouple condition Shorting the input will display the temperature at the meter terminals The secondary display shows any non zero temperature offset This offset is established as a calibrating value during setup Refer to Chapter 5 for additional information The following pushbuttons cannot be used when taking temperature measurements e Frequency ez ms e FAST MN MX IL wull e Ranging Pance AWarning To avoid the potential for fire or electrical shock do not connect the thermocouples to electrically live circuits oA MAX 80PK 1 Type K Thermocouple Probe ach010f eps Figure 3 10 Temperature Measurement 3 15 Model 187 amp 189 Users Manual Measuring Current A Warning Never attempt an in circuit current measurement where the open circuit potential to ea
2. o Disconnect ach004f eps Figure 3 5 Resistance Measurement 3 7 Model 187 amp 189 Users Manual Keep the following in mind when measuring resistance e Because the meter s test current flows through all possible paths between the probe tips the measured value of a resistor in a circuit is often different from the resistor s rated value e The test leads can add 0 1 Q to 0 2 Q 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 press to automatically subtract this value The resistance function can produce enough voltage to forward bias silicon diode or transistor junctions causing them to conduct To avoid this do not use the 30 MQ or 500 MQ ranges for in circuit resistance measurements 3 8 Testing for Continuity Caution 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 Continuity is the presence of a complete path for current flow The continuity test features a beeper that sounds if a circuit is complete The beeper allows you to perform quick continuity tests without having to watch the display The continuity function detects intermittent opens and shorts lasting as little as 1 millisecond 0 001 second These brief contacts cause the meter to emit a short
3. Memory Index Display Model 189 Also used for dBm reference resistance appears when you can use and to increment or decrement settings 2 16 Getting Acquainted Using the Input Terminals Using the Input Terminals TEMPERATURE All functions except current use the 0 and COM inputs Current functions use the inputs shown below e Ma or mA function Use A and COM inputs from 400 mA to 20 A Use mA uA and COM for inputs lt 400 mA e a Or A function Use mA LA and COM for inputs lt 5000 0 pA If a test lead is plugged into the mA uA or A terminal but the rotary switch is not correctly set to one of the current measuring positions the Input Alert beeper warns you by making a chirping sound and the primary display shows LEAdS 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 Figure 2 5 shows the input terminals TEMPERATURE Q gt mA COM V HA 10A MAX FUSED CC Aoma a ee ee Figure 2 5 Input Terminals tc014f eps 2 17 Model 187 amp 189 Users Manual Using Display Hold AutoHOLD Press to enter the Display Hold mode and freeze HOLD the present reading and its time stamp New readings now appear in the secondary display See Figure 2 6 To exit 4 emp em V Display Hold mode press How again i B 3
4. A Input Alert Feature sissen iaia ana ii Contents continued Measuring AC Current Measuring DC Current Measuring Frequency iii Measuring Duty CYCle Measuring Pulse Width ii Using Memory amp Communications Features rrrrerireiiie iii Juttel TE Types Of MEMOry i Saved Readings MEeMOry i Logged Readings Memor Storing Saved Readings deinen ideados niao ka niania kosaka ians adits Starting Logging MEET STOPPING LOGGING DT Viewing Memory Data ii Clearing MEMO E Using Communications 187 and 190 Changing the Default Settings ccsscceseeseeeeeseeeseeeeeeeeeeneeeeeeeeseeeeeeeeseeeeeeseeeneeeees Juttel Hie TEE Selecting Setup Options canon cn rancia rn n ran nar rca Adjusting the Temperature Offset i Selecting Display Resolution 3 1 2 or 4 1 2 Digits Setting the Power Off Timeout conan ccoo ronca cnn rca RSS A Setting the Line Main Freouencn nora canaria rncnnnncs Returning to Factory Defaults AAA Saving Setup Options iii ia tbc ili Model 187 189 Users Manual 6 EE Il miii idad A sci peebe EE ORE General Maintenance AAA iaia ei ia Replacing the Batteries nenene en ee Replacing the FUSES iii User Replaceable Parts ii
5. 2 40 DC mA 50 000mA 0 001mA 0 15 10 1 20 0 75 20 2 40 400 00mA 0 01mA 0 15 2 1 10 1 10 3 40 DCA 5 0000A 0 0001A 0 5 10 2 20 2 20 6 40 10 000A 0 001A 0 5 2 1 5 10 15 10 5 10 1 10 A continuous up to 35 C less than 10 minutes 35 C to 55 C 20 A overload for 30 seconds maximum 2 20 counts in dual display DC or AC DC 3 See AC conversions notes for AC mV and V Model 187 189 Users Manual 1 For the 5 000 count mode divide the number of least significant digits counts by 10 2 For relative humidity greater than 70 resistance accuracy is 0 5 over 1 MQ and 2 5 over 10 MQ 3 Using relative mode REL A to zero residual reading Function Range Resolution Accuracy Resistance 500 00 Q 0 01 Q 0 05 10 5 0000 kQ 0 0001 kQ 0 05 2 50 000 kQ 0 001 kQ 0 05 2 500 00 kQ 0 01 kQ 0 05 2 5 0000 MQ 0 0001 MQ 0 15 4 5 000 MQ up to 32 000 MQ 0 001 MQ 10 4 32 0 MQ up to 50 0 MQ 0 1 MQ 3 0 2 50 0 MQ up to 100 0 MQ 0 1 MQ 3 0 2 100 0 MQ up to 500 0 MQ 0 1 MQ 10 0 2 Conductance 50 00 nS 0 01 nS 1 10 4 To ensure stated accuracy switch to conductance mode and verify that the open circuit reading is less than 0 10 nS Specifications Detailed Accuracy Specifications T 1 For the 5 000 count mode divi
6. 70 Below Trigger Point 100 Figure 3 15 Duty Cycle Measurements 3 24 tc009f eps Making Measurements Measuring Pulse Width To measure duty cycle set up the meter to measure frequency then press a second time You can select the level the meter uses by pressing to trigger on the positive slope or V u lo trigger on the negative slope A typical duty cycle display is shown in Figure 3 16 ann _JUUU mn LL Gales tc027f eps Figure 3 16 Duty Cycle Display For 5 V logic signals use the 5 V dc range For 12 V switching signals in automobiles use the 50 V dc range For sine waves use the lowest ac or dc range that does not result in multiple triggering A manually selected lower input range will often measure better than the AUTO selected input range If a duty cycle reading is unstable press until the AVG annunciator comes on and the average reading appears in the secondary display Measuring Pulse Width The pulse width function allows you to measure the amount of time a signal is high or low within a given period See Figure 3 17 The measured waveform must be periodic its pattern must repeat at equal time intervals 3 25 Model 187 amp 189 Users Manual Start and Stop on Positive Slope Trigger Point 7 1 Frequency Period gt Start and Stop on Negative Slope VW Trigger Point lt _ Pulse Width gt
7. 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 servicing the meter use only specified replacement parts Use caution when working above 30 V ac rms 42 V peak or 60 V dc Such voltages pose a shock hazard Avoid working alone Before You Start 1 Safety Information Table 1 1 Safety Information cont AWarning When using the probes keep your fingers behind the finger guards on the probes Connect the common test lead before you connect the live test lead When you disconnect test leads disconnect the live test lead first Remove test leads from the meter before you open the battery door Do not operate the meter with the battery door or portions of the cover removed or loosened To avoid false readings which could lead to possible electric shock or personal injury replace the batteries as soon as the low battery indicator EM appears Use only type AA batteries properly installed in the meter case to power the meter To avoid the potential for fire or electrical shock do not connect the thermocouples to electrically live circuits Caution 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
8. 189 Users Manual Physical Specifications Display LCD Digital 50000 5000 counts primary display 5000 counts secondary display updates 4 second Analog 51 segments updates 40 second Operating Temperature 20 C to 55 C Storage Temperature 40 C to 60 C Temperature Coefficient 0 05 x specified accuracy C lt 18 C or gt 28 C Relative Humidity 0 to 90 0 C to 35 C 0 to 70 35 C to 55 C Altitude Operating 0 2000 meters per EN61010 CAT III 1000 V CAT IV 600 V 0 3000 meters per EN61010 CAT II 1000 V EN61010 CAT Ill 600 V CAT IV 300 V Storage 10000 meters Battery Type 4 AA Alkaline NEDA 15A or LR6 Battery Life 72 Hours typical with backlight off Shock Vibration Per MIL T PRF 28800 for Class Il instruments Electromagnetic Compatibility Susceptibility and Emissions Commercial Limits per EN61326 1 EMC Size 10 0 cm x 20 3 cm x 5 0 cm 3 94 in x 8 00 in x 1 97 in Not Including Accessory Mount Weight 545 grams 1 2 lbs Warranty Lifetime Calibration Interval 1 year Specifications 7 Feature Summary Feature Summary Feature Description Dual Digital Displays Primary 50 000 counts Secondary 5 000 count Analog Bar Graph Bar graph 51 segments updates 40 times second Backlight with 2 brightness levels AC DC true rms ac rms specified to 100 kHz Continuity Open test Beeper sounds for resistance readings below thr
9. Period tc020f eps Figure 3 17 Pulse Width Measurements 3 26 Making Measurements Measuring Pulse Width The meter measures pulse width in the 500 00 or 1000 0 ms ranges lt Q KH To measure pulse width set up the meter to measure 4 frequency then press two more times As with the ms duty cycle function you can select which level the meter TA a uses by pressing to trigger on the positive slope or I I doo TL to trigger on the negative slope A typical pulse E D I Hz width display is shown in Figure 3 18 LU You can improve pulse width stability by selecting the Hz ms Hz ms Hz ms averaging feature Press until AVG appears in the display tc028f eps Figure 3 18 Pulse Width Display 3 27 Model 187 amp 189 Users Manual 3 28 Chapter 4 Using Memory amp Communications Features Introduction Chapter 4 shows you how to use memory and communication features available on the meters Note Memory Logging and Save features apply to the 189 only Types of Memory The meter has two types of memory data saved readings and logged readings Saved Readings Memory Saved readings include primary and secondary readings and functions the time stamp and display icons representing various features in effect Logged Readings Memory The logging interval Log Int can be set using the meter or FlukeView Forms You can view the average reading for each loggi
10. 0 01 dB 01d8 0248 0 108 0 2 dB 0 8 dB 34 to 60 0 01 dB 0 1 dB 0 2 dB 0 1 dB Not specified Not specified 1 For the 5 000 count mode divide the number of least significant digits counts by 10 2 A residual reading of 8 to 180 digits with leads shorted will not affect stated accuracy above 5 of range Model 187 amp 189 Users Manual l Accuracy Function Range Resolution 45 1 kHz 20 45 Hz 1 20 kHz 20 kHz 100 kHz AC pA 500 00 pA 0 01 pA 0 75 20 0 75 20 5 000 0 pA 0 1 uA 0 75 5 0 75 10 AC mA 50 000 mA 0 001 mA 0 75 20 9 40 400 00 mA 0 01 mA 0 75 5 4 40 AC A 5 0000 A 0 0001 A 15 20 1 5 20 Not specified 10 000 A 0 001 A 15 5 1 5 5 Not specified 1 10 A continuous up to 35 C less than 10 minutes 35 C to 55 C 20 A overload for 30 seconds maximum Specifications Detailed Accuracy Specifications T Accuracy Accuracy Dual Display AC or AC DC Function Range Resolution DC 20 45Hz 45Hz 1kHz 1kHz 20kHz DC mV 50 000mV 0 001mV 0 1 20 2 80 05 40 6 40 500 00mv omm 0 03 2 3000 0 mV 0 1 mv 0 025 5 2 40 DCH 5 0000V 0 0001V 0 025 10 50 000 V 0 001 V 0 03 3 500 00 V 0 01 V 0 1 2 Not specified 1000 0 V 0 1 V 0 1 2 Not specified DCHA 500 00pA 0 01pA 0 25 20 1 20 1 0 20 2 4 40 5 000 0uA 0 1 uA 0 25 2 1 10 0 75 10
11. 1 Function Specific Setup Selections Selection Precondition Option Choices 4 gt 000 0 d Temperature ec Temperature 000 0 to 100 0 180 0 Use to or selected offset adjust increment or decrement digit Ana Det Use p to select digit Selected digit flashes L Int Model 189 only Log interval MM SS Use to increment or decrement minute or second values Use gt to select minute or seconds Selected values flash dbrEF AC volts e V or dB type dBm or dBV m or V flashing Use 4 wmv selected to select dbr EF AC volts e V or dBm reference 0001 Q to 1999 Q Use to increment mV and dBm or decrement digit SSES Use to select digit Factory Default 000 0 Y or F 15 00 dBV 0600 Q Changing the Default Settings 5 Selecting Setup Options Table 5 2 Common Setup Selections Selection bEEP 8888 bloFF PrOFF Hour 50 60 Fet4 Option Beeper Display digits Backlight time out Power off time out 24 hour clock Line Main frequency Restore factory defaults Choices Factory Default YES orno flashing Use to select YES 8888 4 or 8BBBB 5 Use p to select 88888 MM SS Use to increment or decrement minute or 15 00 second values Use to select minutes or seconds Selected values flash Setting value to 00 00 disables timeout HH MM Use to increment or decrement hour or minute 00 15 values Use
12. In Case of Difficulty AAA 7 Specifications 4a sane scecevenecscuudasteanczeasesseceeesinexesesss Safety eeler Physical Specifications nn nro rra rca Feature SUMMA Y eiii REENEN ene iena Basic Specifications i Detailed Accuracy Specifications Frequency Counter Sensitivity i Burden Voltage A MA PA Input CharacteriStiCS i iv List of Tables Table E EE lte Tun le rale lei aaa 1 2 International Electrical Gvmbole AA 2 1 Rotary Switch Selections i 2 2 PUSMDUTIONS isis re ia LAS AEREA ERA 2 3 Display Features iaia dani 3 1 Current Measurement 4 1 View Display coat LI ALI IAA Ri RIG ed 5 1 Function Specific Setup Selections 5 2 Common Setup Selections cooooconcccinnccnncccnoncnnoncnnnnnnnnnnncnnnn nono n cnn crac c nn cnn nncn rca nn cn nnn nana 6 1 User Replaceable Parts iioie nola iaia iena Model 187 189 Users Manual vi List of Figures Figure 2 1 AC Volts DIS gees eege eege Egger eu 2 2 Rotary Switch 2 3 TE e tel EE 2 4 Display E MIT 225 A E 2 6 Display Hold and AutoHOLD 2275 MIN Ma AVG WEE 2 8 Relative ee EE 3 1 AC Voltage Measurement i 3 2 GBM Display iii aia 3 9 AG and ER len ET EE 3 4 DC Voltage Measurement non ncnnnnncnnn cnn nn cnn nan nnrnn nan n rn rn na nn nn ran nn nnnnnins 3 5 Resistance Measurement ccceeecceeeeseeeeeeseneeeeneeneeeeseesenesaueeesesenseseneee
13. direct current voltage is constant over time Chapter 3 Making Measurements Ranges available in volts functions are as V acide V 5 0000 V 50 000 V 500 00 V 1000 0 V e oe mV actdo mV 50 000 mV 500 00 mV and 5000 0 mV Readings in the 5000 0 mV range overload OL near 3000 mV ac or dc The 5000 0 mV range overlaps the 5 0000 V range to provide direct reading display for Fluke accessories that have a millivolt output with limits scaled by 1000 For example the Fluke 80i 1000 Current Clamp provides 1 mV ac per amp measured up to 1000 amps 3 1 Model 187 amp 189 Users Manual When measuring voltage the meter acts like a 10 MQ 10 000 000 Q 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 kQ 10 000 Q or less Measuring AC Voltage The meter presents ac voltage values as rms root mean square readings The rms value is the equivalent dc voltage that would produce the same amount of heat in a resistance as the measured voltage Your meter features true rms readings which are accurate for sinewaves and other wave forms with no dc offset such as square waves triangle waves and staircase waves For ac with dc offset USE ass V Set up the meter to measure ac volts as shown in Figure 3 1 All pushbutton features are available in this function The blue b
14. display The present power off time in hours and minutes appears as four digits in the lower right corner of the display The maximum timeout setting is 23 hours and 59 minutes The minimum setting 00 00 disables the power off timeout Press to advance or to go back between digits With the desired digit selected flashing press to increment or to decrement the value When you have set the digits as desired press IT J6 to save the settings and proceed to the next setup selection Changing the Default Settings Setting the 24 Hour Clock Setting the 24 Hour Clock The meter uses 24 hour clock readings as time stamps during HOLD AutoHOLD MIN MAX FAST MN MX SAVE and LOGGING operations Hours and minutes to a maximum of 23 59 can be set Note The meter uses elapsed time for all MIN MAX readings Elapsed time is expressed in minutes and seconds to a maximum of 59 59 and then changes to hours and minutes To change the 24 hour clock 1 Press __ untilHour appears in the display and the hour digits in the lower right corner of the display begin flashing 2 Press or to increase or decrease the hour value 3 Press I gt to advance to the minute setting the minute digits begin flashing 4 Press or V _v to increase or decrease the minute value 5 Press _ to store the selection and proceed to the next selection Setting the Line Main Frequency Although the meter
15. e In VIEW MEM see Chapter 4 Model 189 e In Setup decrement a digit none e In counter functions select negative pulse slope e In ohms continuity select beep on short e In VIEW MEM see Chapter 4 Model 189 Exit AUTO and enter MANUAL ranging In MANUAL SAVE Press to save present reading select next input range Press KH Model 189 CANCEL to return to AUTO Successively press for frequency duty cycle and CANCEL CANCEL any blue key function pulse width E and all other button features O The blue button Press to access blue functions on none gt the rotary switch In Setup use arrow function gt to select the next digit or item in a list 2 9 Model 187 amp 189 Users Manual Selecting the Range Press to select either a fixed range or the autorange feature Note You cannot use in conductance diode test and temperature functions or with the REL MIN MAX and FAST MN MX features These selections all use a specific fixed range Autoranging AUTO lighted in the display always comes on initially when you select a new function In autorange the meter selects the lowest input range possible ensuring that the reading appears with the highest available precision resolution If AUTO is already on press to enter MANUAL ranging in the present range You can then select the next manual range each time you press Pance Return to autoranging by Dressing J CANCEL 2 10 Un
16. indicate when a particular pushbutton is not allowed when measuring frequency The following are some general rules e Relative sa Hold How and MIN MAX mu max can be used e FASTMN MX ____ mumax cannot be used The following are some tips for measuring frequency e Ifa reading shows as 0 Hz or is unstable the input signal may be below or near the trigger level You can usually correct these problems by selecting a lower range which increases the sensitivity of the meter e If areading seems to be a multiple of what you expect the input signal may be distorted Distortion can cause multiple triggerings of the frequency counter Selecting a higher voltage range might solve this problem by decreasing the sensitivity of the meter In general the lowest frequency displayed is the correct one Measuring Duty Cycle Duty cycle or duty factor is the percentage of time a signal is above or below a trigger level during one cycle Figure 3 15 The duty cycle mode is optimized for measuring the on or off time of logic and switching signals Systems such as electronic fuel injection systems and switching power supplies are controlled by pulses of varying width which can be checked by measuring duty cycle 3 23 Model 187 amp 189 Users Manual Measures Positive Pulse Trigger Point 7 Trigger Point 30 Above Trigger Point Measures Negative Pulse Slope W Trigger Point Trigger Point 77
17. you to place the data into standard default or customized forms The forms can display the data in table and graph form as well as view user comments You can use these forms to satisfy ISO 9000 and other documentation requirements Model 187 189 Users Manual Introduction The meter allows you to change the default operating configuration of the meter by changing setup options made at the factory Many of these setup options affect general meter operations and are active in all functions Others are limited to one function or group of functions These settings are stored and can be changed in the Setup mode using the procedure described in this chapter Selecting Setup Options To enter the Setup mode turn the meter on and press CC J6 SETUP Chapter 5 Changing the Default Settings In the Setup mode each press of ___ SETUP saves changes to the last selection and steps to the next option Each setup option appears in the primary display in the sequence shown in Tables 5 1 and 5 2 The options in Table 5 1 are available only when the preconditions are met The options in Table 5 2 are available for all functions When measuring dc volts none of the preconditions in Table 5 1 are required and only the selections shown in Table 5 2 will appear To exit the Setup mode Dress CANCEL Be sure to save your last selection by preseing J first 5 1 Model 187 amp 189 Users Manual Table 5
18. 3 B AC Note j U un I em LI 971 0 9497 In the MIN MAX mode Display Hold functions like a Figure 2 6 Display Hold and AutoHOLD toggle interrupting and resuming the MIN MAX operations The bar graph and secondary display may show different units in Capacitance and Ohms due to Autoranging tc040f eps With Model 189 you cannot use Display Hold while logging data Model 189 allows you to save the frozen reading to memory by Dressing SAVE Getting Acquainted Using AutoHOLD Using AutoHOLD A Warning AutoHOLD mode does not capture unstable or noisy readings Do not use AutoHOLD mode to determine that circuits are without power To enter AutoHOLD press J noo J AutoHOLD AutoHOLD mode freezes the present reading and its time stamp New readings now appear in the secondary display See Figure 2 6 When the meter detects a new stable reading gt 4 change from last stable reading it beeps and displays the new reading in the primary display You can also force a primary display update by pressing How 1 If you remove the test leads open the input the meter retains the last frozen primary display You cannot use AutoHOLD when MIN MAX is active With Model 189 you cannot initiate AutoHOLD while logging data but you can initiate logging when AutoHOLD is active To exit AutoHOLD mode press _ AutoHOLD again Using MIN MAX The MIN MAX mode stores minimum MIN and maximum MAX inpu
19. 89 Users Manual Measuring Capacitance Caution 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 Capacitance is the ability of a component to store an electrical charge The unit of capacitance is the farad F Most capacitors are in the nanofarad nF to microfarad uF range The meter measures capacitance by charging the capacitor with a known current for a known period of time measuring the resulting voltage then calculating the capacitance Capacitors larger than 100 uF take several seconds to charge The capacitor charge can be up to 3 V The meter s capacitance ranges are 1 nF 10 nF 100 nF 1 uF 10 uF 100 uF 1 mF 10 mF and 50 mF 3 12 To measure capacitance set up the meter as shown in Figure 3 8 The blue key toggles the selection between capacitance and diode test While measuring capacitance the following pushbutton functions are not available e Frequency tz ms e FAST MN MX IL mn ma The following are some tips for measuring capacitance e To speed up measurements of similar values press to manually select the proper range e To improve the measurement accuracy of small value capacitors press with the test leads open to subtract the residual capacitance of the meter and leads Making Meas
20. 9 Users Manual The following are some tips for measuring current e If the display shows LEAdS and you are sure the meter is set up correctly test the meter s fuses as described under Testing the Fuses in Chapter 6 e A current meter drops a small voltage across itself which might affect circuit operation You can calculate this burden voltage using the values listed in Chapter 7 under Burden Voltage A mA yA 3 18 Measuring AC Current To measure ac current set up the meter as shown in Figure 3 11 The blue pushbutton cannot be used with ac current measurement All other pushbutton features can be used Making Measurements 3 Measuring Current FLUKE 189 Loca vuLnueren FLUKE 189 LOGGING MULTIMETER 083 Figure 3 11 AC Current Measurement FLUKE 189 LOGGING MULTINETER ach008f eps 3 19 Model 187 amp 189 Users Manual Measuring DC Current To measure dc current set up the meter as shown in Figure 3 12 You can view separate dc and ac amps signal components e Press O once to display ac current in the primary display and dc current in the secondary display ac over dc e Press O a second time to reverse the displays dc over ac In either of these states the following pushbutton functions are not available Display hold Hou AutoHOLD __ mozo MIN MAX mn max FAST
21. A HA Function mA LA Range Burden Voltage typical 500 00 yA 102 uV uA 5 000 pA 102 uV A 50 000 mA 1 8mV mA 400 00 mA 1 8mV mA 5 0000 A 0 04 V A 10 000 A 0 04 V A 7 11 Model 187 amp 189 Users Manual Input Characteristics Function Input Impedance Nominal Volts mV 10 MQ lt 100 pF Po Common Mode Rejection Ratio Normal Mode Rejection DC Volts mV gt 100 dB at dc 50 Hz or 60 Hz 0 1 gt 90 dB at 50 Hz or 60 Hz 0 1 Full Scale Voltage AC Volts mV gt 90 dB dc to 60 Hz Open Circuit Test Voltage To 5 MQ 30 MQ nS Diode Test 1 mA typical 7 12
22. FLUKE Model 187 amp 189 True RMS Multimeter Users Manual August 2000 Rev 2 6 02 2000 2002 Fluke Corporation All rights reserved Printed in U S A All product names are trademarks of their respective companies Lifetime Limited Warranty Each Fluke 20 70 80 170 and 180 Series DMM will be free from defects in material and workmanship for its lifetime As used herein lifetime is defined as seven years after Fluke discontinues manufacturing the product but the warranty period shall be at least ten years from the date of purchase This warranty does not cover fuses disposable batteries damage from neglect misuse contamination alteration accident or abnormal conditions of operation or handling including failures caused by use outside of the product s specifications or normal wear and tear of mechanical components This warranty covers the original purchaser only and is not transferable For ten years from the date of purchase this warranty also covers the LCD Thereafter for the lifetime of the DMM Fluke will replace the LCD for a fee based on then current component acquisition costs To establish original ownership and prove date of purchase please complete and return the registration card accompanying the product or register your product on http www fluke com Fluke will at its option repair at no charge replace or refund the purchase price of a defec tive product purchased through a Fluke authorized sales o
23. MN MX ___ mumax HZ hz ms Relative REL A LOGGING and SAVE Model 189 3 20 e Press a third time to display the ac dc rms value in the primary display FAST MN MX is unavailable in this state e Press a fourth time to return to the normal dc display Making Measurements 3 Measuring Current KE Total current to circuit Circuit Power OFF to connect meter ON for measurement OFF to disconnect meter FLUKE 189 LOGGING MULTIMETER ach007f eps Figure 3 12 DC Current Measurement 3 21 Model 187 amp 189 Users Manual Measuring Frequency Frequency is the number of cycles a signal completes each second The meter measures the frequency of a voltage or current signal by counting the number of times the signal crosses a threshold level each second Figure 3 13 highlights the function selections that allow frequency measurement To measure frequency select an appropriate function connect the meter signal source and press Hz ms The meter autoranges to one of four frequency ranges 500 00 Hz 5 0000 kHz 50 000 kHz and 999 99 kHz Figure 3 14 shows a typical frequency display 3 22 Figure 3 13 Functions Allowing Frequency Measurement tc021f eps Making Measurements 3 Measuring Duty Cycle 4 mn bUUU I 5 00 rian AUTO IER Figure 3 14 Hz Display tc026f eps The meter beeps to
24. Readings Model 189 only Up to 100 readings may be saved by the user in a memory separate from LOGGING memory These readings may be viewed using VIEW MEM Specifications 7 Detailed Accuracy Specifications Detailed Accuracy Specifications Accuracy is specified for a period of one year after calibration at 18 C to 28 C 64 F to 82 F with relative humidity to 90 Accuracy specifications are given as of reading number of least significant digits AC mV AC V AC yA AC mA and AC A specifications are ac coupled true rms and are valid from 5 of range to 100 of range AC crest factor can be up to 3 0 at full scale 6 0 at half scale except the 3000 mV and 1000 V ranges where it is 1 5 at full scale 3 0 at half scale Function AC mv ACV dBV Accuracy Range Resolution 45Hz 1kHz 20 45Hz 1kHz 10 kHz 10 kHz 20 kHz 20 kHz 100 kHz 50 000 mV 0 001 mV 0 4 40 2 80 5 40 5 5 40 15 40 500 00 mV 0 01 mV 0 4 40 2 80 5 40 5 5 40 8 40 3000 0mv 0 1 mV 04 40 2 80 04 40 15 40 8 40 5 0000 V 0 0001 V 0 4 40 2 80 04 40 15 40 8 40 50 000V 0 001 V 04 40 2 80 04 40 15 40 8 40 500 00V 0 01V 0 4 40 2 80 04 40 Notspecified Not specified 1000 0V 0 1v 0 4 40 2 80 04 40 Notspecified Not specified 52to 6 0 01 dB 0 1 dB 0 2 dB 0 5 dB 0 5 dB 1 4 dB 6t0 34
25. Signal events must be 500 ms or longer in the following functions continuity conductance capacitance temperature Hz duty cycle and pulse width 2 20 Getting Acquainted Using FAST MN MX Using FAST MN MX FAST MN MX can capture transient signal events as short as 250 us but with decreased accuracy only 3 1 2 display digits are allowed Activate FAST MN MX by Dressing mumax As with regular MIN MAX you can then press to cycle through maximum minimum and average primary displays The meter beeps for any new minimum or maximum value Exit FAST MN MX by pressing TL J ms CANCEL or by turning the rotary switch A low battery condition flashing disables FAST MN MX In ac measurement functions MAX and MIN values are peak values AVG is the rms value This provides the necessary information in one display for calculation of Crest Factor peak rms Due to longer required response times you cannot use FAST MN MX in the following functions ohms diode test conductance continuity capacitance temperature ac over dc ac dc Hz duty cycle and pulse width je Tb dom EA Se 19 47 mm AUTO Sms 10 08 V Ux I 5 00 AUTO us JFC tc033f eps Figure 2 7 Min Max Avg 2 21 Model 187 amp 189 Users Manual Using HOLD with MIN MAX or FAST MN MX You can enable the HOLD mode when in the MIN MAX mode is by pressing Horo No further minimum maximum
26. Yellow Button Description Press ___ to access Yellow Button Functions The ____ box and the 24 hour clock appear in the lower corners of the display and the primary display freezes allowing time to press a second button Press to turn backlight on or off Also in Setup use SETUP Press to access Setup selections lt the arrow function lt to select the previous digit or E Press to store a Setup selection and item in a list proceed to the next selection Press to freeze the displayed value Press again to AutoHOLD Press to begin AutoHOLD the last release the display stable reading is displayed Press to start retaining min max and average values FAST MN MX Press to start FAST MN MX mode Press successively to display max min and average KH where min and max values for short values Press _ CANCEL to stop duration events are stored Press to store the present reading as an offset LOGGING Press to start and stop Logging reference subsequent readings show only the relative J Model 189 Dress Ji difference from this value Press again to show the CANCEL to stop difference as a percentage of the reference 2 8 Getting Acquainted Pushbuttons Table 2 2 Pushbuttons cont Yellow Button Button Description Function Description e In Setup increment a digit none e In counter functions select positive pulse slope e In ohms continuity select beep on open
27. al is preset to 15 minutes To change the logging interval see Selecting Setup Options in Chapter 5 The logging interval can be as high as 99 minutes or as low as 1 second There is enough meter memory for at least 288 intervals 3 days of 15 minute intervals Use Fluke View Forms to store additional logging data in your PC s memory Note The meter allows interval logging to begin only if logged readings memory is empty Refer to the Clearing Memory discussion below Stopping Logging Logging stops when one of the following occurs e Youpress __ CANCEL e A flashing low battery condition E occurs e Logged readings memory becomes full e You change the rotary switch position Using Memory amp Communications Features 4 Viewing Memory Data Viewing Memory Data Use the following procedure to view memory data Note Viewing memory data involves turning the rotary switch from ts current function Selections are not retained when you turn the switch To return the meter to this function after viewing memory data note the function and the enabled selections before you turn the rotary switch 1 Disconnect the input leads at the measurement source A Warning To avoid electric shock disconnect the test leads at the measurement source prior to viewing memory data 2 Turn the rotary switch to the VIEW MEM position The primary display shows memory data Refer to Figure 4 1 for an explanati
28. and range for your measurements Before measuring current check the meter s fuses and turn power OFF to the circuit before connecting the meter to the circuit Model 187 amp 189 Users Manual Symbols Symbols used on the meter and in this manual are explained in Table 1 2 Table 1 2 International Electrical Symbols we AC Alternating Current L Earth ground Lee DC Direct Current EE Fuse AS AC and DC A Double insulated Battery Important information Complies with relevant Canadian A Complies with European Union directives Standards Association directives E Inspected and licensed by T V Product Underwriters Laboratories Inc amp Services Introduction Although this manual describes the operation of both Models 187 and 189 all illustrations and examples assume use of Model 189 Additional capabilities with Model 189 are discussed in Chapter 4 These capabilities include the following e Anenhanced memory function that features an additional position VIEW MEM on the rotary switch e Logging e Save e Memory Chapter 2 Getting Acquainted Turning the Meter On To turn the meter on turn the rotary switch from OFF to any switch setting The ac volts function shown in Figure 2 1 is assumed in the following discussion You do not need connections to the input terminals at this time If you want a view of the full display all segments illuminated press and hold while
29. ar memory in two ways First H the rotary switch is in the VIEW MEM position you can press the blue button O to activate the CLEAR MEM function lr d appears in the display You are then prompted to press YES to clear the type of memory presently in use or v_ NO to stop the clear procedure The display defines the type of memory to be cleared as to clear logged readings memory MEM to clear saved readings memory A second clearing procedure is required when you try to start logging and the logged readings memory is not empty Lr d appears in the display To clear the logged readings memory and begin logging new data Press YES To decline the clearing operation and not begin logging press V 1 NO If you attempt to save a meter reading when saved readings memory is full FULL appears in the display You must use the VIEW MEM function to clear saved readings memory before proceeding Using Communications 187 and 189 When using a PC to meter IR infrared communication link refer to the FlukeView Forms Installation Guide or the on line help You can use the IR communication link and FlukeView Forms software to transfer the contents of a meter s memory to a PC Note The 187 and 189 will log in real time mode to a connected computer running Fluke View Forms In addition the 189 allows the user to log to internal memory and connect to the computer later for download Fluke View Forms allows
30. beep To select continuity turn the rotary switch to resistance position then press the blue button once The continuity symbol Al appears in the display Continuity uses manual ranging only autoranging is not available Refer to Figure 3 6 for continuity testing setup instructions Making Measurements 3 Using Conductance for High Resistance Tests Continuity testing provides you with both a visual indication of the state encountered usually near 0 resistance for a short or OL for an open and an audible beep when the input is low In continuity a short means a measured value less than 5 of full scale You can raise this threshold by manually selecting a higher range You can select whether the beeper comes on for open or short conditions as follows e Press to enable the beeper for opens e Press V _ to enable the beeper for shorts The Hz 12 m and FAST MN MX C J mn max functions are not available when continuity is selected All other pushbutton functions are available The blue key cycles among resistance continuity and conductance Using Conductance for High Resistance 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 unit of conductance is the Siemens S The meter s 50 nS range measures conductance in nanosiemens 1 nS 0 000000001 Siemens Because such small amounts of conductance
31. ch Function AC voltage measurement from O V to 1000 0 V AC millivolt measurement from 0 mV to 3000 0 mV DC voltage measurement from 0 V to 1000 0 V DC millivolt measurement from O mV to 3000 0 mV Resistance measurement from 0 Q to 500 0 MQ Capacitance measurement from 0 001 nF to 50 mF Temperature measurement Blue Key Function dB over AC AC over dB dB over AC AC over dB AC over DC AC in primary display DC in secondary display DC over AC ac dc AC over DC AC in primary display DC in secondary display DC over AC ac dc Continuity test Conductance measurement from 0 nS to 50 00 nS Diode test Toggles between C and F Getting Acquainted Pushbuttons Table 2 1 Rotary Switch Positions cont Position Rotary Switch Function O Blue Key Function A AC current measurements from O mA to 20 000 A none mA AC current measurements from O uA to 5000 0 uA none HA ie DC current measurements from O mA to 20 000 A AC over DC AC in primary display DC in secondary A display DC over AC ac dc DC current measurements from O uA to 5000 0 uA AC over DC AC in primary display DC in secondary Duke display DC over AC ac dc VIEW Model 189 only Access data held in the meter s CLEAR MEM See Chapter 4 for more information MEM memory See Chapter 4 for more information 2 7 Model 187 amp 189 Users Manual Table 2 2 Pushbuttons Button Description Note Function
32. correspond to extremely high resistance the nS range lets you determine the resistance of components up to 100 000 MQ or 100 000 000 000 Q 1 nS 1 000 MQ To measure conductance set up the meter as shown in Figure 3 7 then press the blue key until the nS indicator appears on the display With conductance measurements the following pushbutton operations cannot be used e Frequency Hz ms e FAST MN MX mumax e Manual ranging Rance 3 9 Model 187 amp 189 Users Manual For in circuit tests turn circuit power off Press for beep on open Press for beep on short Press to select ON closed closed ach003f eps Figure 3 6 Continuity Test Making Measurements 3 Using Conductance for High Resistance Tests SS ca FLUKE 189 LOGGING MULTIME Press twice to select nS ach023f eps Figure 3 7 Conductance Measurement The following are some tips for measuring conductance e High resistance readings are susceptible to electrical noise Use averaging to smooth out most noisy readings press until AVG appears in the display e There is normally a residual conductance reading with the test leads open To ensure accurate readings press with the test leads open to subtract the residual value 3 11 Model 187 amp 1
33. de the number of least significant digits counts by 10 2 For film capacitor or better using Relative mode REL A to zero residual on 1 000 nF and 10 00 nF ranges 3 Least significant digit not active above 10 mF Function Ranges Resolution Accuracy Capacitance 1 000 nF 0 001 nF 2 5 10 00 nF 0 01 nF 1 5 100 0 nF 0 1 nF 1 000 uF 0 001 uF 10 00 pF 0 01 uF 100 0 uF 0 1 uF 1 000 uF 1 uF 10 0 mF 0 01 mF 50 00 mF 0 01 mF 3 10 Diode Test 3 1000 V 0 0001 V 2 20 Model 187 amp 189 Users Manual Function Range Resolution Accuracy Frequency 500 00 Hz 0 01 Hz 0 0050 1 5 0000 kHz 0 0001 kHz 50 000 kHz 0 001 kHz 999 99 kHz 0 01 kHz Duty Cycle 10 00 to 90 00 0 01 voltage range input voltage X 300 counts Pulse Width Temperature 499 99 ms 0 01 ms 3 X voltage range input voltage 1 count 999 9 ms 0 1 ms 200 to 1350 C 0 1 C 1 of reading 1 C 328 to 2462 F 0 1 F 1 of reading 1 8 F MIN MAX AVG Response 100 ms to 80 Specified accuracy 12 counts for changes gt 200 ms in duration 40 counts in AC for changes gt 350 ms and inputs gt 25 of range FAST MN MX 250 us OO E ON trigger levels o Reading will be 0 00 for signals below 0 5 Hz Accuracy specification is relative to the user adjustable temperature offset and assumes ambient temperature stable to 1 C For ambi
34. derstanding the Display Display features are shown in Figure 2 4 and described in Table 2 3 Major display features are described in the following paragraphs Note You can show all display segments as shown in Figure 2 4 by pressing while turning the meter on Release to turn off the full display Primary Display The primary display usually shows the present reading for the rotary switch function For most of these functions the primary display can be set to show 4 or 5 digits See Chapter 5 for more information about display digits Other uses for this display are e AutoHOLD most recent held reading e MIN MAX maximum minimum or average value Getting Acquainted Understanding the Display e dB in ac volts functions the dBm or dBV value e REL the difference between the present reading and a stored reference reading e Setup various messages see Chapter 5 e Overload conditions OL displayed e Error conditions Secondary Display The secondary display often shows the present reading when the primary display shows some other feature MIN MAX REL A etc When multiple features are active the secondary display shows one of the values For example Hz could appear in the secondary display while dB appears in the primary display Bar Graph The bar graph provides an analog indication of the measured input For most measurement functions the bar graph updates 40 times per second Since this re
35. e period is set to 0 the backlight is on indefinitely and can only be turned off by pressing or turning the meter off Note See Chapter 5 for power off and backlight off setup information Low Battery Indication A constant battery icon NN in the upper left corner of the display notifies you that the batteries are low and should be replaced A Warning To avoid false readings which could lead to possible electric shock or personal injury replace the batteries as soon as the battery icon appears A flashing battery icon means that battery failure is imminent The backlight cannot be used in this condition MIN MAX and FAST MN MX features turn off For Model 189 logging and communications also cease Model 187 amp 189 Users Manual Rotary Switch Turn the meter on by selecting any measurement function identified with white letters around the rotary switch The meter presents a standard display for that function range measurement units modifiers etc The display may also be influenced by some of the choices made in Setup Use the blue button to select any rotary switch alternate function labeled in blue letters You can also use other buttons to choose modifiers for the selected function When you turn the rotary switch from one function to another a display for the new function appears Button choices made in one function do not carry over into another function With Model 189 a VIEW MEM sw
36. ent temperature changes of 5 C rated accuracy applies after 1 hour For repetitive peaks 2 5 ms for single events Use DC function settings below 20 Hz 50 mV range not specified Frequency greater than 5 Hz except for VDC 500 mVDC and 3000 mVDC functions 0 5 Hz to 1 kHz Signals centered around Specified accuracy 100 counts up to 5 000 count full range reading For higher peak readings to 20 000 counts specified accuracy 2 of reading Range input ratios also apply to current functions 500 counts or 5 for 10 A ranges 7 10 Specifications 7 Frequency Counter Sensitivity Frequency Counter Sensitivity Approximate VAC Sensitivity RMS Sine Wave 15 Hz to Approximate VDC VDC Input Range 100 kHz 500 kHz VAC Bandwidth Trigger Levels Bandwidth 50 mV 5 mV 10 mV 1 MHz 5 mV 8 5 mV 1 MHz 500 mV 20 mV 20 mV 1 MHz 5 mV amp 65 mV 1 MHz 3000 mV 500 mV 2000 mV 800 kHz 140 mV 200 mV 90 kHz 5V 0 5 V 2 0V 950 kHz 14V amp 2 0V 14 kHz 50 V 5V 5 0V 1 MHz 0 5V amp 6 5V gt 400 kHz 500 V 20 V 20V 1 MHz 5V amp 65V gt 400 kHz 1000 V 100 V 100 V gt 400 kHz 5V amp 65V gt 400 kHz 1 Maximum input 10 x Range 1000 V max Noise at low frequencies and amplitudes may affect accuracy 2 Useable at reduced sensitivity to 0 5 Hz and 1000 kHz 3 Typical frequency bandwidth with full scale or maximum 2 X 10 V Hz product RMS sine wave Burden Voltage A m
37. eshold or to indicate a momentary open circuit Fast Bar Graph 51 segments for peaking and nulling Duty cycle Pulse width Measure signal on or off time in or milliseconds MIN MAX Mode Record maximum minimum and average values 24 hour clock for MAX or MIN elapsed time for AVG FAST MN MX with 24 hour time stamp FAST MN MX captures peaks to 250 usec Closed Case Calibration No internal adjustments needed Battery Fuse Access Door Battery or fuse replaceable without voiding calibration Hi Impact Overmolded Case Protective holster features Model 187 amp 189 Users Manual Basic Specifications Function DC Voltage O to 1000 V Ranges Description AC Voltage true RMS 2 5 mV to 1000 V 100 kHz bandwidth Basic Accuracy DC voltage 0 025 AC voltage 0 4 DC Current 0 to 10 A 20 A for 30 seconds AC Current true RMS 25 uA to 10 A 20 A for 30 seconds Resistance 0 to 500 MQ Conductance 0 to 500 nS Capacitance 0 001 nF to 50 mF Diode Test 3 1 V Temperature 200 C to 1350 C 328 F to 2462 F Frequency 0 5 Hz to 1000 kHz LOGGING Intervals Model 189 only At least 288 intervals may be stored Up to 707 unstable event values see AutoHold are automatically added to LOGGING memory for viewing only through optional PC software Additional intervals will be logged up to 995 if the signal is stable SAVE
38. he impedance of the system being measured Model 187 amp 189 Users Manual dB is calculated with the following formula dB 20 log E Vr e For dBm Vr is the voltage across the reference resistance at 1 mW For example Vr would be 0 7746 V with a 600 Q reference resistance e For dBV the reference voltage Vr is 1 V Measuring DC Voltage Set up the meter for dc voltage measurement as shown in Figure 3 4 All pushbutton features are available for a standard dc volts reading Both AC and DC Voltage Measurements When a dc volts function is selected the meter can display ac and dc components of a signal separately or the combined ac dc rms value To select separate ac and dc signal components e Press O once to display ac voltage in the primary display and dc voltage in the secondary display ac over dc e Press O a second time to reverse the displays dc over ac e Press a third time to display the ac dc rms value in the primary display FAST MN MX is unavailable in this state e Press a fourth time to return to the normal dc volts display Figure 3 3 shows some typical displays Making Measurements 3 Measuring Voltage AC over DC DC over AC AC DC 11830 490 11940 500 5 00 5 00 S AUTO l AUTO AUTO r 193 LIS O us O gt Figure 3 3 AC and DC Display tc024f eps When the meter shows ac over dc or dc over ac the follow
39. ing other pushbutton functions are not available e AutoHOLD __ J moto e MIN MAX mn max e FAST MN MX C fina Hz He ms e Relative RE A e LOGGING C J R4 3 5 Model 187 amp 189 Users Manual FLUKE 189 Loca ach002f eps Figure 3 4 DC Voltage Measurement 3 6 Measuring Resistance Caution 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 Resistance is an opposition to current flow The unit of resistance is the ohm Q The meter measures resistance by sending a small current through the circuit The meter s resistance ranges are 500 00 Q 5 0000 kQ 50 000 kQ 500 00 kQ 5 0000 MQ 30 000 MQ and 500 0 MQ To measure resistance set up the meter as shown in Figure 3 5 All pushbutton functions are available with resistance measurements The blue key cycles to continuity and conductance measurement which are described later in this chapter Note In the Ohms Mode a negative sign on the display indicates the presence of voltage This will cause reading errors Making Measurements 3 Measuring Resistance In Circuit Resistance Measurements Isolating a Potentiometer Circuit Power e T_T FLOKE 189 LOGGING MULTIMETER MKO man mr LOGGING Isolating a Resistor
40. itch position is available refer to Chapter 4 for more information The rotary switch is shown in Figure 2 2 Each position is described in Table 2 1 ns wll gt ep Q de F 8 mV C x NH mA mV uA dB a Se A OFF uh ac dc VIEW MEM CLEAR MEM tc012f eps Figure 2 2 Rotary Switch Getting Acquainted Pushbuttons Pushbuttons The buttons activate features that augment the function selected with the rotary switch The buttons are shown in Figure 2 3 and described in Table 2 2 Use the blue button O to access functions labeled in blue for some of the rotary switch positions Table 2 1 defines all blue button functions Use the yellow button ____ followed by other buttons to access additional features These features appear in yellow above the appropriate keys Table 2 2 defines yellow button features This manual identifies the yellow button feature in parentheses following the button sequence For example activating the FAST MN MX mode appears as FAST MN MX AutoHOLD FAST MN MX LOGGING YES HOLD MINMAX RELA An CANCEL SAVE NO Hz ms RANGE Wu SETUP O lt gt tc013f eps Figure 2 3 Pushbuttons The following yellow button features are not available on Model 187 YES NO LOGGING and SAVE 2 5 Model 187 amp 189 Users Manual Table 2 1 Rotary Switch Selections Position ac de V acede MV 2 6 Rotary Swit
41. ng interval on the meter s display A scheduled logging interval may contain stable and unstable logged readings Unstable logged readings represent unstable events as defined by the AutoHOLD function See the Specifications To provide more detailed logging information the meter also stores the high low and average value for each set of stable and unstable logged readings You can only access these logged readings using Fluke View Forms Some of the logged readings can only be accessed using a PC running the FlukeView Forms software Fluke View Forms displays the data in graphical or tabular form prints and stores the data Model 187 amp 189 Users Manual Storing Saved Readings To add the current displayed reading to the saved readings memory press SAVE e SAUEd appears briefly to confirm the operation and the index number display increments by one e FULL appears if no room is available in the saved readings memory after 100 saves Saved readings can be viewed later as originally displayed Actual primary and secondary readings and functions the time stamp and display icons are all stored in stored readings memory The meter does not save the bar graph For example if the original reading was in volts ac function with the dB modifier selected the saved reading will contain the saved dB value Starting Logging To begin logging press ___ Ret A LOGGING is shown on the display The logging interv
42. ny other provision Fluke Corporation Fluke Europe B V P O Box 9090 P O Box 1186 Everett WA 98206 9090 5602 BD Eindhoven U S A The Netherlands 2 02 Table of Contents Chapter 1 Before YOu Malicia aida aiii al did AA Aaa INTOAUGHON cinte Turning the Meter ON corona nan n cnn nana carr rnn nr nn nnnnns Battery Considerations iia Automatic Power ON Automatic Backlight Off Low Battery Indicatton eee eee ee eeeneeeeeeneeeeeeneeeeeeaeeeeseaeeeeeeaeeeeeeaeeesenaeeeeneneeeeeeaas le Ee EE NN ele en Model 187 189 Users Manual selecting the RS iii ovas Understanding the Display AAA Primary RI Secondary Display Bar Graphic aan oo Using the Input Terminals AA Using Display Hold EE Using AutoHOLD ii Using MINIMAX cosie ian eneee leale alal Using FAST MNMX ET Using HOLD with MIN MAX or FAST MN MX Using Relative Mode DEL 3 Making Measurements ss ssesssssenunrennnnnnnnunnnnnnnunnnnnnnunnnnnnnnnnnnnnnnnnnennnnnnnnnnnnnnnannnnn ennn IMITOQUETIONI 1 ci E alinea ni niet Measuring Voltage eet n e era E oE ai eraen e aa Measuring AC Voltage ennt dB Measurements in AC Volts Functions i EIN i Both AC and DC Voltage Measurement ii Measuring Resistance Testing for Continuity Using Conductance for High Resistance Tests EUR ii Testing Elle EE Measuring Temperature ii Measuring Current
43. on of the VIEW MEM display If the primary display data is a logged reading appears in the display You can switch between the two types of memory data Press SAVE for saved reading Press LOGGING for logged reading To view more detailed logged reading information use Fluke View Forms software The index lower left corner of the display identifies the displayed memory data by number You can view additional memory data by pressing and Repeat steps 4 and 5 to switch between the two types of memory data To exit viewing memory turn the rotary switch to any other position Remember that the meter returns to the default selections for the new function position Model 187 189 Users Manual b Figure 4 1 View Display b tc035f eps Table 4 1 View Display No Item A arrow icons 4 symbol LOG Memory data Time display MEM Index number Description Denotes use of or to select higher or lower index numbers Hazardous voltage could be present at inputs Identifies that the average of a logging interval is displayed When off a saved reading is displayed Shows logged readings or secondary readings Indicates a time stamp off or elapsed time 6 on display On during View memory Identifies the data entry being viewed Using Memory amp Communications Features 4 Clearing Memory Clearing Memory You can cle
44. ondary display e l Indicates negative readings In Relative mode this sign indicates that the present input is less than the stored reference 4 gt 30 V ac and or dc may be present at the input terminals Low battery If flashing battery failure is imminent and logging and backlight are disabled Se i ZAWarning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the low battery indicator appears 2 13 Model 187 amp 189 Users Manual Table 2 3 Display Features cont Number Feature Description FAST FAST MN MX mode is enabled mum MIN Minimum reading displayed MAX Maximum reading displayed AVG Average reading displayed LOG Readings are being recorded in memory Model 189 only ___ Ret 4 Brow amena ala made mog Lauter E actives EECH 42 BBBBB Primary Display 4 1 2 digit Measurement Units V mV V Volts The unit of voltage mV Millivolt 1 x 103 or 0 001 volts dBm dBV For ac volts functions reading is shown in decibels of power above or below 1 mW dBm or decibels of voltage above or below 1 V dBV L Overload input Getting Acquainted Understanding the Display Table 2 3 Display Features cont 43 Number Feature AC DC O KO MO ns nF uF mF C zb A mA LA Hz kHz MHz Descri
45. operates on battery power only it is important to specify the frequency 50 or 60 Hz of the line main power This allows the meter to filter out related noise To change the line main frequency 1 Press _ until58 60 appears in the display 2 Press 9 or O to change the selection to the correct frequency 3 Press ____ to store the selection and proceed to the next selection 5 7 Model 187 amp 189 Users Manual Returning to Factory Defaults Your meter comes with the setup options preset at the factory These factory settings are shown in Tables 5 1 and 5 2 You can always return to these settings as follows 1 Press __ until FctY appears in the display 2 Press to select YES press to select no If you select YES all setup options revert to the factory defaults you cannot specify individual choices 3 Press __ to exit the setup procedure and activate your selection If you selected YES in step 2 all factory settings are restored If you selected no selections made in the Setup mode become active 5 8 Saving Setup Options At each setup option store your choice and advance to the next option by Dressing If you are storing the last option this also exits the setup mode To exit the Setup mode without saving the present option press t2 ms CANCEL Selections that were previously saved with ___ are retained Introduction This chapter de
46. or average updates occur while the HOLD mode is enabled Exit HOLD mode by pressing a second time Using Relative Mode REL Selecting Relative mode REL 4 causes the meter to zero the display and store the present reading as a reference for subsequent measurements e Press once to select the Relative Mode The meter enters manual range when you enter the Relative Mode The reference appears in the secondary display The difference between the reference and a new measurement appears in the primary display See Figure 2 8 2 22 Press a second time to enter the REL mode and display the difference as 10 of the reference reading In REL A appears on the display Press a third time to exit the Relative Mode 2500 TT I I 0 MANUAL ER tc039f eps Figure 2 8 Relative Mode Introduction Chapter 3 explains how to make measurements Most measurement functions can be selected by using the rotary switch White letters or symbols identify primary functions blue letters or symbols identify alternative functions Press the blue button to access these alternate functions Frequency related functions can be selected Hz duty cycle and pulse width when the rotary switch is in any volts or amps position Measuring Voltage Voltage is the difference in electrical potential between two points The polarity of ac alternating current voltage varies over time while the polarity of dc
47. or mA A for currents above 5000 pA Open the circuit path to be tested Touch the red probe to the more positive side of the break touch the black probe to the more negative side of the break Reversing the leads will produce a negative reading but will not damage the meter Turn on power to the circuit then read the display Be sure to note the unit given at the right side of the display uA mA or A Turn off power to the circuit and discharge all high voltage capacitors Remove the meter and restore the circuit to normal operation Input Alert Feature If a test lead is plugged into the mA uA or A terminal but the rotary switch is not correctly set to one of the current measuring positions the beeper warns you by making a chirping sound and the display shows LEAdS This Input Alert 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 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 Note The beeper may sound in the presence of high electical noise such as that found near Pulse Width Modulation PWM motor drives 3 17 Model 187 amp 18
48. ption For dc volts and dc amps functions reading represents the rms total of ac and dc measurements Q Ohm The unit of resistance kQ Kilohm 1 x 103 or 1000 ohms MQ Megohm 1 x 108 or 1 000 000 ohms S Siemens The unit of conductance nS Nanosiemens 1 x 109 or 0 000000001 Siemens F Farad The unit of capacitance nF Nanofarad 1 x 10 or 0 000000001 farads uF Microfarad 1 x 108 or 0 000001 farads mF Millifarad 1 X 10 Sor 0 001 farads Degrees Celsius default or Fahrenheit A Amperes amps The unit of current mA Milliamp 1 x 10 or 0 001 amperes uA Microamp 1 x 108 or 0 000001 amperes Hz Hertz The unit of frequency kHz Kilohertz 1 x 103 or 1000 hertz MHz Megahertz 1 x 108 or 1 000 000 hertz 2 15 Model 187 amp 189 Users Manual Table 2 3 Display Features cont Number 03 Feature 51000 Gus 8 88 am 8 6 8 0 8 8 8 AUTO MANUAL Description Range Digits display range in use Time Display Used with HOLD AutoHOLD MIN MAX FAST MN MX SAVE and LOGGING Model 189 Elapsed Time Display on shown in minutes seconds to maximum of 59 59 used if time since Min Max or Logging started is less than 60 minutes Always used for Min Max Avg Displays hours minutes after 1 hour 24 hour Display off shown in hours minutes to maximum of 23 59 For setting the 24 hour clock refer to Chapter 5 Secondary Display QS MEM 1888
49. r or Service Center call USA 1 888 99 FLUKE 1 888 993 5853 Canada 1 800 36 FLUKE 1 800 363 5853 Europe 31 402 678 200 Japan 81 3 3434 0181 Singapore 65 738 5655 Anywhere in the world 1 425 446 5500 Address correspondence to Fluke Corporation Fluke Europe B V P O Box 9090 P O Box 1186 Everett WA 98206 9090 5602 BD Eindhoven USA The Netherlands Visit us on the World Wide Web at www fluke com 1 1 Model 187 amp 189 Users Manual Table 1 1 Safety Information A Warning To avoid possible electric shock or personal injury follow these guidelines 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 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 If this product is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired 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 Do not apply more than the rated voltage as marked on the meter between terminals or between any terminal and earth ground Before use verify the meter s operation by measuring a known voltage
50. ric shock or personal injury replace the batteries as soon as the battery indicator EN appears Replace the batteries as follows refer to Figure 6 2 1 Turn the rotary switch to OFF and remove the test leads from the terminals Remove the battery door by using a standard blade screwdriver to turn the battery door screws one quarter turn counterclockwise Replace the batteries and the battery door Secure the door by turning the screws one quarter turn clockwise Model 187 amp 189 Users Manual Figure 6 2 Battery and Fuse Replacement 6 4 Maintenance 6 Replacing the Fuses Replacing the Fuses A Warning To avoid electrical shock or damage to the meter only use replacement fuses specified in Table 6 1 Referring to Figure 6 2 examine or replace the meter s fuses as follows 1 Turn the rotary switch to OFF and remove the test leads from the terminals 2 Remove the battery acccess door by using a standard blade screwdriver to turn the battery door screws one quarter turn counterclockwise 3 Remove either fuse by gently prying one end loose then sliding the fuse out of its bracket 4 Install ONLY specified replacement fuses with the amperage voltage and speed ratings shown in Chapter 7 5 Reinstall the battery door Secure the door by turning the screws one quarter turn clockwise User Replaceable Parts User replaceable parts are listed in Table 6 1 These parts can be ordered b
51. rth is greater than 1000 V You may damage the meter or be injured if the fuse blows during such a measurement Caution 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 your measurement Never place the probes across in parallel with any circuit or component when the leads are plugged into the current terminals Current is the flow of electrons through a conductor To measure current you must open the circuit under test then place the meter in series with the circuit 3 16 To measure ac or dc current proceed as follows 1 Turn off power to the circuit Discharge all high voltage capacitors 2 Insert the black lead into the COM terminal Insert the red lead in an input appropriate for the measurement range as shown in Table 3 1 Note To avoid blowing the meter s 440 mA fuse use the mA uA terminal only if you are sure the current is less than 400 mA Table 3 1 Current Measurement Rotary Switch Input Ranges Aa or AG 5 0000 A n SES 10 000 A reading flashes at 10 A overloads OL at 20 A mA 50 000 mA HA 500 00 mA A Or HA mA 500 00 uA P 5000 0 pA Making Measurements 3 Measuring Current If you are using the A terminal set the rotary switch to mA A If you are using the mA uA terminal set the rotary switch to uA for currents below 5000 uA 5 mA
52. scribes basic operator maintenance For calibration and performance test information order the 187 8 189 Service Manual PN 1584337 General Maintenance Periodically wipe the case with a damp cloth and mild detergent Do not use abrasives or solvents Dirt or moisture in the terminals can affect readings and can falsely activate the Input Alert feature Clean the terminals as follows 1 Turn the meter off and remove all test leads 2 Shake out any dirt that may be in the terminals Chapter 6 Maintenance 3 Soak a new swab with alcohol Work the swab around in each terminal Testing the Fuses Before measuring current test the appropriate fuse as shown in Figure 6 1 If the tests give readings other than those shown have the meter serviced AWarning To avoid electrical shock or personal injury remove the test leads and any input signals before replacing the battery or fuses To prevent damage or injury install ONLY specified replacement fuses with the amperage voltage and speed ratings shown in Chapter 7 6 1 Model 187 amp 189 Users Manual 6 2 Replace F2 if LEAGS or FUSE displayed Figure 6 1 Replace F1 if LEAGS or FUSE displayed Testing the Current Fuses ach038f eps Maintenance 6 Replacing the Batteries Replacing the Batteries Replace the batteries with four AA batteries NEDA I5A or IEC LR6 A Warning To avoid false readings which could lead to possible elect
53. see footnote 5 CD ROM Contains Users Manual TM6 1576992 1 Getting Started Manual PNs English 1547486 French German Italian Dutch 1555282 Danish Finnish Norwegian Swedish 1555307 French Spanish Portuguese 1555294 Simplified Chinese Traditional Chinese Korean Japanese Thai 1555282 6 6 Chapter 7 Specifications Safety and Compliances Maximum voltage between any terminal and earth ground Compliances DUAL RATINGS Complies with IEC 1010 1 to 1000 V Overvoltage Category III Pollution Degree 2 and IEC 664 1 to 600 V Overvoltage Category IV Pollution Degree 2 1000 V dc or rms ac Certifications listed and pending CSA per standard CSA CAN C22 2 No 1010 1 92 UL per standard UL 3111 TUV per standard EN 61010 Part 1 1993 Surge Protection 8 kV peak per IEC 1010 1 92 A Fuse Protection for mA or uA inputs 0 44 A 44 100 A 440 mA 1000 V FAST Fuse A Fuse Protection for A input 11 A 1000 V FAST Fuse Markings CE 6 UL T V and OVERVOLTAGE Installation Categories refer to the level of Impulse Withstand Voltage protection provided at the specified Pollution Degree e Overvoltage Category Il equipment is equipment in fixed installations Examples include switch gear and polyphase motors e Overvoltage Category IV equipment is equipment for use at the origin of the installation Examples include electricity meter and primary over current protection equipment Model 187 amp
54. sensaaeeeneeeeeesenaees 3 6 Continuity TOS EE 3 7 Conductance Meaesuremenmt i 3 8 Capacitance MeasuremMEnt i 3 9 o A O vil Model 187 189 Users Manual 3 10 3 11 3 12 3 13 3 14 3 15 3 16 3 17 3 18 4 1 5 1 6 1 Temperature Measurement AC Current Measurement DC Current Measurement Functions Allowing Frequency Measurement HZ Display Duty Cycle Measurements Duty Cycle Display Pulse Width Measurements Pulse Width Display View Display Adjusting Temperature Offset Testing the Current Fuses Battery and Fuse Replacement viii Safety Information The Fluke Model 187 and Model 189 True RMS Multimeters hereafter referred to as the meter comply with EN61010 1 1993 ANSI ISA S82 01 1994 CAN CSA C22 2 No 1010 1 92 1000V Overvoltage Category III Pollution Degree 2 600V Overvoltage Category IV Pollution Degree 2 UL 3111 1 Use the meter only as specified in this manual Otherwise the protection provided by the meter may be impaired Refer to safety information in Table 1 1 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 Chapter 1 Before You Start Contacting Fluke To order accessories receive assistance or locate the nearest Fluke distributo
55. sponse is much faster than the digital display the bar graph is useful for making peak and null adjustments and for observing rapidly changing inputs The bar graph is not available in temperature capacitance ac over dc dc over ac and ac dc functions 2 11 Model 187 amp 189 Users Manual 8 10 od FAST MAX MIN AVG D Au FC umVA OA VO ag eo ch H H DH dBmVs lt gC a eT i Opt a UTO emeng Q IBBB ABBA H om 8688 Q tc011f eps Figure 2 4 Display Features 2 12 Getting Acquainted Understanding the Display Table 2 3 Display Features Number Feature Description D 221 Continuity test function is selected 2 Bar Graph lt III 7 SC x 1 1 I In normal operation 0 zero is on the left In Relative 0 is in the center negative values are to the left and positive to the right The polarity indicator left of the bar graph shows the polarity of the input Both polarity indicators appear in REL mode The arrow right of the bar graph indicates an overload condition lt gt Both arrows appear without bar graph when you can use lt and O gt to select settings in the setup mode 3 Percent difference in Relative mode is being displayed in the primary display The reference value is shown in the secondary display l gt Relative REL A mode is active The primary display has been modified by the reference value shown in the sec
56. stored offset shown in the secondary display See Figure 5 1 Changing the Default Settings Adjusting the Temperature Offset 5 If necessary adjust the temperature offset until the temperature on the primary display matches the temperature indicated by the lag bath thermometer 1 Press T gt to advance to the next digit and press lt to go back to the previous digit 2 Press or V _v to increase or decrease the digit value 3 Save changes by pressing _ 4 Press _ to exit Setup 2636 pt 31 Figure 5 1 Adjusting Temperature Offset tc041f eps 5 5 Model 187 amp 189 Users Manual Selecting Display Resolution 3 1 2 or 4 1 2 Digits For most functions you can choose whether the meter displays the reading in 3 1 2 or 4 1 2 digits The 3 1 2 digit setting provides lower resolution with faster response time The 4 1 2 digit setting provides greater resolution with slower response time The 4 1 2 digit display is available with all functions except continuity conductance capacitance and FAST MN MX To select the display resolution 1 5 6 Drees then until 8888 for 3 1 2 digits or 88888 for 4 1 2 digits appears in the display To change the selection press lt or O Press __ then to save the selection and proceed to the next setup selection Setting the Power Off Timeout 1 Drees Ten until Pr OFF appears in the
57. t values When the input goes below the stored minimum value or above the stored maximum value the meter beeps and stores the new value MIN MAX mode also calculates an average AVG of all readings taken since the mode was activated Press to enter the MIN MAX mode The maximum MAX reading is displayed first Each subsequent press of steps through the minimum MIN average AVG and back to the maximum reading In the MIN MAX mode the secondary display continues to show the present measurement value The time elapsed since the MIN MAX mode was entered is shown in the bottom right corner of each type of display See Figure 2 7 2 19 Model 187 amp 189 Users Manual To exit MIN MAX mode press _ CANCEL or turn the rotary switch to a different position Also MIN MAX mode turns off automatically when a flashing low battery condition occurs Note Minimum maximum and average values stored in the MIN MAX mode are lost when the meter is turned off The MIN MAX mode can be used to capture intermittent readings store maximum readings while you are away or store readings while you are operating the equipment under test and cannot watch the meter The average reading is useful for smoothing out unstable inputs calculating power consumption or estimating the percent of time a circuit is active The MIN MAX mode is appropriate for storing signal events that last 50 ms or longer in most measurement functions
58. to select hours or minutes Selected values flash HH MM Use A to increment or decrement hour or minute 00 00 values Use to select hours or minutes Selected values flash 60 or SG flashing Use 4 to select 60 YES or no flashing Use to select no Model 187 amp 189 Users Manual Select and edit setup options as follows e Turn the rotary switch to a measurement function e Press _ to advance to the next setup option and save the present selection e Press to increase or v_v to decrease a value e Press lt to go back to the previous digit or selection e Press to advance to the next digit or selection e Any digit or selection being changed flashes when active e Press J CANCEL to exit Setup Be sure to save your last selection by Dressing first Adjusting the Temperature Offset If the meter is in a temperature measurement function use the following procedure to set an offset for your temperature probe o 1 Turn the rotary switch to temperature cr 2 Connect the temperature probe and probe adapter to the COM and V inputs on the meter 3 Place the temperature probe and an accurate thermometer in a lag bath i e a container with an isothermal liquid 4 Press _ 6 to enter the Setup mode and temperature adjust The primary display shows the measured value for the temperature probe This value is already adjusted by any previously
59. turning the meter on Release the button when you are done viewing the full display 2 1 Model 187 amp 189 Users Manual 49999 5 AUTO tc031f eps Figure 2 1 AC Volts Display Battery Considerations The meter uses four AA alkaline batteries The following paragraphs describe several techniques used to conserve battery power Automatic Power Off The display blanks and the meter goes into a sleep mode if you have not changed the rotary switch position or pressed a button for a set period While in Sleep mode pressing any button turns the meter on The meter then returns to the display for the function selected with the rotary switch all previously activated button features HOLD Hz etc are discarded The automatic power off is preset to 15 minutes From the Setup menu see Chapter 5 you can specify a maximum period of 23 hours 59 minutes If you set the period to 0 the meter remains on until you turn the rotary switch to OFF or the batteries become too weak Automatic power off does not occur if the meter is in MIN MAX FAST MN MX AutoHOLD or LOGGING Model 189 mode Getting Acquainted Battery Considerations Automatic Backlight Off Press to select the backlight level low high or off In low or high the backlight turns off automatically after a given period This period is also preset to 15 minutes and can be set to a maximum of 99 minutes from the setup menu If th
60. urements 3 Testing Diodes FLUKE 189 10 ere ere enee CANCEL Figure 3 8 Capacitance Measurement ach005f eps Testing Diodes Caution 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 The test sends a current through a semiconductor junction then measures the junction s voltage drop A typical junction drops 0 5 V to 0 8 V In diode test the beeper is active It beeps briefly for a normal junction and is on continuously if a short is detected To test a diode out of a circuit set up the meter as shown in Figure 3 9 In a circuit a similar diode should still indicate a forward bias 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 The blue key toggles between diode test and capacitance Since diode test uses a fixed range cannot be used 3 13 Model 187 amp 189 Users Manual Typical q PA FLUKE 189 LOGGING MULTIMETER FLUKE 189 LOGGING MULTIMETER OL Ann FASTMNNX LOGGING es mn FASTIANMX LOGGING ene Fam furia CANCEL bal serue ns Forward Bias e Le Reverse Bias Press for Diode Test
61. utlet and at the applicable international price Fluke reserves the right to charge for importation costs of repair replacement parts if the product purchased in one country is sent for repair elsewhere If the product is defective contact your nearest Fluke authorized service center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no risk for damage in transit Fluke will pay return transportation for product repaired or replaced in warranty Before making any non warranty repair Fluke will estimate cost and obtain authorization then invoice you for repair and return transportation THIS WARRANTY IS YOUR ONLY REMEDY NO OTHER WARRANTIES SUCH AS FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSED OR IMPLIED FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES INCLUDING LOSS OF DATA ARISING FROM ANY CAUSE OR THEORY AUTHORIZED RESELLERS ARE NOT AUTHORIZED TO EXTEND ANY DIFFERENT WARRANTY ON FLUKE S BEHALF Since some states do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages this limitation of liability may not apply to you If any provision of this warranty is held invalid or unenforceable by a court or other decision maker of competent jurisdiction such holding will not affect the validity or enforceability of a
62. utton accesses decibel dBm or dBV measurements discussed next in this chapter FLUKE 189 LOGGING MULTIMETER ULTIMETER v AC AUTO Switch Box ach001f eps Figure 3 1 AC Voltage Measurement Making Measurements Measuring Voltage 3 dB Measurements in AC Volts Functions The two ac volts functions allow you to display readings as deviations in dB decibels above or below an established level Set up dB measurements with the following procedure 1 Make an ac volts measurement to be used as a reference point 2 Press to select dB The dBm or dBV value appears in the primary display and the ac volts reading appears in the secondary display A typical dB display appears in Figure 3 2 3 Press again to switch the ac volts and dB readings Press a third time to turn dB off 4368 IA Zo AUTO I 1183 J tc032f eps Figure 3 2 dBm Display Normally dB is measured as dBm which is a measure of decibels relative to 1 milliwatt The meter assumes a resistance of 600 Q in making this calculation This resistance can be set for any value from 1 to 1999 Q using the meter s setup capabilities see Chapter 5 When set to other than 600 Q the dBm reference resistance appears in the Index Display See Figure 2 4 item 17 Note If dBm is displayed check that the reference resistance value closely matches t
63. y contacting Fluke See How to Contact Fluke in Chapter 1 In Case of Difficulty If the meter does not seem to work properly 1 Examine the case for damage If damage is detected contact Fluke See Contacting Fluke in Chapter 1 2 Check and replace as needed the batteries fuses and test leads 3 Review this manual to verify correct operation 4 Ifthe meter still does not work pack it securely and forward it postage paid to the location provided by the appropriate Fluke contact Include a description of the problem Fluke assumes no responsibility for damage in transit A meter under warranty will be repaired or replaced at Fluke s option and returned at no charge See the registration card for warranty terms 6 5 Model 187 amp 189 Users Manual Table 6 1 User Replaceable Parts Description Access Door Battery Fuse MP14 Reference Designators Part Number Qty 666446 1 Tilt Stand MP8 659026 1 Accessory Mount MP9 658424 1 A Fuse 0 44 A 44 100 A 440 mA 1000 V FAST F1 943121 1 AFuse 11 A 1000 V FAST F2 803293 1 Battery 1 5 V 0 15 mA AA Alkaline H8 H9 H10 H11 376756 4 Fasteners Battery Fuse Access Door H12 H13 948609 2 Screws Phillip Head H4 H5 H6 H7 832246 4 AC7OA Alligator Clip Black MP38 738047 1 AC7OA Alligator Clip Red MP39 738120 1 TL71 Right Angle Test Lead Set MP34 802980 1 Getting Started Manual TM1 TM5

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Model 187 & 189