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Fluke 187, User Manual

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Making Measurements

Measuring Current

3

3-19

MIN MAX

HOLD

REL

% ms

Hz

RANGE

dB

dB

ac+dc

ac+dc

ac+dc

ac+dc

F

nS

mA

mA

A

mV

V

mV

V

OFF

C

A

A

A

A

mA

COM

V

TEMPERATURE

A

MIN MAX

HOLD

REL

% ms

Hz

RANGE

dB

dB

ac+dc

ac+dc

ac+dc

ac+dc

F

nS

mA

mA

A

mV

V

mV

V

OFF

C

A

A

A

A

mA

COM

V

TEMPERATURE

A

AutoHOLD

LOGGING

SAVE

CANCEL

FAST MN MX

SETUP

YES

NO

1000V

400mA
FUSED

10A MAX

FUSED

CAT

CLEAR MEM

VIEW

MIN MAX

HOLD

REL

% ms

Hz

RANGE

dB

dB

ac+dc

ac+dc

ac+dc

ac+dc

F

nS

mA

mA

A

mV

V

mV

V

OFF

C

A

A

A

A

mA

COM

V

TEMPERATURE

A

MIN MAX

HOLD

REL

% ms

Hz

RANGE

dB

dB

ac+dc

ac+dc

ac+dc

ac+dc

F

nS

mA

mA

A

mV

V

mV

V

OFF

C

A

A

A

A

mA

COM

V

TEMPERATURE

A

AutoHOLD

LOGGING

SAVE

CANCEL

FAST MN MX

SETUP

YES

NO

1000V

400mA
FUSED

10A MAX

FUSED

CAT

CLEAR MEM

VIEW

MIN MAX

HOLD

REL

% ms

Hz

RANGE

dB

dB

ac+dc

ac+dc

ac+dc

ac+dc

F

nS

mA

mA

A

mV

V

mV

V

OFF

C

A

A

A

A

mA

COM

V

TEMPERATURE

A

MIN MAX

HOLD

REL

% ms

Hz

RANGE

dB

dB

ac+dc

ac+dc

ac+dc

ac+dc

F

nS

mA

mA

A

mV

V

mV

V

OFF

C

A

A

A

A

mA

COM

V

TEMPERATURE

A

AutoHOLD

LOGGING

SAVE

CANCEL

FAST MN MX

SETUP

YES

NO

1000V

400mA
FUSED

10A MAX

FUSED

CAT

CLEAR MEM

VIEW

V

mA

A

mA

A

mA

A

mA

A

A

A

LOGGING MULTIMETER

189

LOGGING MULTIMETER

189

LOGGING MULTIMETER

189

ach008f.eps

Figure 3-11. AC Current Measurement

Summary of Contents for 187

Page 1: ... Model 187 189 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 ...

Page 2: ...tion 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 tran...

Page 3: ... Safety Information 1 1 Contacting Fluke 1 1 Symbols 1 4 2 Getting Acquainted 2 1 Introduction 2 1 Turning the Meter On 2 1 Battery Considerations 2 2 Automatic Power Off 2 2 Automatic Backlight Off 2 3 Low Battery Indication 2 3 Rotary Switch 2 4 Pushbuttons 2 5 ...

Page 4: ...h MIN MAX or FAST MN MX 2 22 Using Relative Mode REL 2 22 3 Making Measurements 3 1 Introduction 3 1 Measuring Voltage 3 1 Measuring AC Voltage 3 2 dB Measurements in AC Volts Functions 3 3 Measuring DC Voltage 3 4 Both AC and DC Voltage Measurements 3 4 Measuring Resistance 3 6 Testing for Continuity 3 8 Using Conductance for High Resistance Tests 3 9 Measuring Capacitance 3 12 Testing Diodes 3 1...

Page 5: ... 1 Storing Saved Readings 4 2 Starting Logging 4 2 Stopping Logging 4 2 Viewing Memory Data 4 3 Clearing Memory 4 5 Using Communications 187 and 189 4 5 5 Changing the Default Settings 5 1 Introduction 5 1 Selecting Setup Options 5 1 Adjusting the Temperature Offset 5 4 Selecting Display Resolution 3 1 2 or 4 1 2 Digits 5 6 Setting the Power Off Timeout 5 6 Setting the 24 Hour Clock 5 7 Setting th...

Page 6: ...ies 6 3 Replacing the Fuses 6 5 User Replaceable Parts 6 5 In Case of Difficulty 6 5 7 Specifications 7 1 Safety and Compliances 7 1 Physical Specifications 7 2 Feature Summary 7 3 Basic Specifications 7 4 Detailed Accuracy Specifications 7 5 Frequency Counter Sensitivity 7 11 Burden Voltage A mA µA 7 11 Input Characteristics 7 12 ...

Page 7: ...ternational Electrical Symbols 1 4 2 1 Rotary Switch Selections 2 6 2 2 Pushbuttons 2 8 2 3 Display Features 2 13 3 1 Current Measurement 3 16 4 1 View Display 4 4 5 1 Function Specific Setup Selections 5 2 5 2 Common Setup Selections 5 3 6 1 User Replaceable Parts 6 6 ...

Page 8: ...Model 187 189 Users Manual vi ...

Page 9: ...Terminals 2 17 2 6 Display Hold and AutoHOLD 2 18 2 7 Min Max Avg 2 21 2 8 Relative Mode 2 22 3 1 AC Voltage Measurement 3 2 3 2 dBm Display 3 3 3 3 AC and DC Display 3 5 3 4 DC Voltage Measurement 3 6 3 5 Resistance Measurement 3 7 3 6 Continuity Test 3 10 3 7 Conductance Measurement 3 11 3 8 Capacitance Measurement 3 13 3 9 Diode Test 3 14 ...

Page 10: ...21 3 13 Functions Allowing Frequency Measurement 3 22 3 14 Hz Display 3 23 3 15 Duty Cycle Measurements 3 24 3 16 Duty Cycle Display 3 25 3 17 Pulse Width Measurements 3 26 3 18 Pulse Width Display 3 27 4 1 View Display 4 4 5 1 Adjusting Temperature Offset 5 5 6 1 Testing the Current Fuses 6 2 6 2 Battery and Fuse Replacement 6 4 ...

Page 11: ...ble 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 Contacting Fluke To order accessories receive assistance or locate the nearest Fluke distributor 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 8...

Page 12: ...rer 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 m...

Page 13: ...tric shock or personal injury replace the batteries as soon as the low battery indicator M 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 Di...

Page 14: ...rnational Electrical Symbols AC Alternating Current Earth ground DC Direct Current Fuse AC and DC Double insulated Battery Important information Complies with relevant Canadian Standards Association directives Complies with European Union directives Inspected and licensed by TÜV Product Services Underwriters Laboratories Inc ...

Page 15: ...ction that features an additional position VIEW MEM on the rotary switch Logging Save Memory 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 pr...

Page 16: ...od 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 o...

Page 17: ...or turning the meter off Note See Chapter 5 for power off and backlight off setup information Low Battery Indication A constant battery icon B in the upper left corner of the display notifies you that the batteries are low and should be replaced WWarning To avoid false readings which could lead to possible electric shock or personal injury replace the batteries as soon as the battery icon B appear...

Page 18: ...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 switch position is available refer to Chapter 4 for more information The rotary switch i...

Page 19: ...on O 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 O M FAST MN MX MIN MAX HOLD REL ms Hz RANGE MIN MAX HOLD REL ms Hz RANGE AutoHOLD LOGGING S...

Page 20: ...voltage measurement from 0 V to 1000 0 V AC over DC AC in primary display DC in secondary display DC over AC ac dc m DC millivolt measurement from 0 mV to 3000 0 mV AC over DC AC in primary display DC in secondary display DC over AC ac dc j Resistance measurement from 0 Ω to 500 0 MΩ Continuity test Conductance measurement from 0 nS to 50 00 nS z Capacitance measurement from 0 001 nF to 50 mF Diod...

Page 21: ...0 µA to 5000 0 µA none K DC current measurements from 0 mA to 20 000 A AC over DC AC in primary display DC in secondary display DC over AC ac dc x DC current measurements from 0 µA to 5000 0 µA AC over DC AC in primary display DC in secondary display DC over AC ac dc VIEW MEM Model 189 only Access data held in the meter s memory See Chapter 4 for more information CLEAR MEM See Chapter 4 for more i...

Page 22: ...and proceed to the next selection Q Press to freeze the displayed value Press again to release the display AutoHOLD O Q Press to begin AutoHOLD the last stable reading is displayed M Press to start retaining min max and average values Press successively to display max min and average values Press O N CANCEL to stop FAST MN MX O M Press to start FAST MN MX mode where min and max values for short du...

Page 23: ...ative pulse slope In ohms continuity select beep on short In VIEW MEM see Chapter 4 Model 189 none R Exit AUTO and enter MANUAL ranging In MANUAL select next input range Press O N CANCEL to return to AUTO SAVE O R Press to save present reading Model 189 N Successively press for frequency duty cycle and pulse width CANCEL O N CANCEL any blue key function and all other button features s The blue but...

Page 24: ...ing in the present range You can then select the next manual range each time you press R Return to autoranging by pressing O N CANCEL Understanding 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 Q while turning the meter on Rele...

Page 25: ... REL 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 response is much faster than the digital display the bar g...

Page 26: ...Model 187 189 Users Manual 2 12 14 16 15 17 8 9 10 11 7 13 5 6 2 4 3 1 12 tc011f eps Figure 2 4 Display Features ...

Page 27: ...nd s to select settings in the setup mode p Percent difference in Relative mode is being displayed in the primary display The reference value is shown in the secondary display e Relative REL mode is active The primary display has been modified by the reference value shown in the secondary display Indicates negative readings In Relative mode this sign indicates that the present input is less than t...

Page 28: ...g displayed Readings are being recorded in memory Model 189 only O D g The meter is in Hold mode Q gS AutoHOLD is active O Q 8 8 8 8 8 Primary Display 4 1 2 digit 0L Overload input Measurement Units V mV V Volts The unit of voltage mV Millivolt 1 x 10 3 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 ...

Page 29: ...emens The unit of conductance nS Nanosiemens 1 x 10 9 or 0 000000001 Siemens nF µF mF F Farad The unit of capacitance nF Nanofarad 1 x 10 9 or 0 000000001 farads µF Microfarad 1 x 10 6 or 0 000001 farads mF Millifarad 1 X 10 3or 0 001 farads C F Degrees Celsius default or Fahrenheit A mA µA A Amperes amps The unit of current mA Milliamp 1 x 10 3 or 0 001 amperes µA Microamp 1 x 10 6 or 0 000001 am...

Page 30: ... 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 HM88 88 24 hour Display f off shown in hours minutes to maximum of 23 59 For setting the 24 hour clock refer to Chapter 5 8 8 8 8 Secondary Display MEM q1888 Memory Index Display Model 189 Also used for dBm reference resistanc...

Page 31: ...ts 5000 0 µA If a test lead is plugged into the mA µA 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 LEAd5 This warning is intended to stop you from attempting to measure voltage continuity resistance capacitance or diode values when the leads are plugged in...

Page 32: ...de press Q again Note The bar graph and secondary display may show different units in Capacitance and Ohms due to Autoranging In the MIN MAX mode Display Hold functions like a toggle interrupting and resuming the MIN MAX operations With Model 189 you cannot use Display Hold while logging data Model 189 allows you to save the frozen reading to memory by pressing O R SAVE AutoHOLD tc040f eps Figure ...

Page 33: ...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 O Q AutoHOLD again Using MIN MAX The MIN MAX mode stores minimum MIN and maximum MAX input 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 a...

Page 34: ...ermittent 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 measu...

Page 35: ...minimum or maximum value Exit FAST MN MX by pressing ON CANCEL or by turning the rotary switch A low battery condition flashing B 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...

Page 36: ...play and store the present reading as a reference for subsequent measurements Press D 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 Press D a second time to enter the REL mode and display the differ...

Page 37: ...n 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 direct current voltage is constant over time Ranges available in volts functions are 5 0000 V 50 000 V 500 00 V 1000 0 V m 50 000 mV 500 00 mV and 5000 0 mV Readings in the 5000 0 mV range overload 0L near 3000 mV ac or dc...

Page 38: ...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 Set up the meter to measure ac volts as shown in Figure 3 1 All pushbutton features are available in this function The blue button accesses decibel dBm or dBV measurements discussed next in this chapter MIN MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac dc ...

Page 39: ...ical 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 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 Ω in making this calculation This resistance can be set for any value from 1 to 1999 Ω using the meter s setup capabi...

Page 40: ...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 Press once to display ac voltage in the primary display and dc voltage in the secondary display ac over dc Press a second time to reverse the displays dc over ac Pre...

Page 41: ...3 5 AC over DC DC over AC AC DC tc024f eps Figure 3 3 AC and DC Display When the meter shows ac over dc or dc over ac the following other pushbutton functions are not available AutoHOLD O Q MIN MAX M FAST MN MX O M Hz N Relative D LOGGING O D ...

Page 42: ...he 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 Ω The meter measures resistance by sending a small current through the circuit The meter s resistance ranges are 500 00 Ω 5 0000 kΩ 50 000 kΩ 500 00 kΩ 5 0000 MΩ 30 000 MΩ and 500 0 MΩ To measure resista...

Page 43: ...dB ac dc ac dc ac dc ac dc F nS mA mA A mV V mV V OFF C A A A A mA COM V TEMPERATURE A AutoHOLD LOGGING SAVE CANCEL FAST MN MX SETUP YES NO 1000V 400mA FUSED 10A MAX FUSED CAT CLEAR MEM VIEW nS nS Circuit Power OFF In Circuit Resistance Measurements Disconnect 1 2 3 Isolating a Potentiometer 1 3 2 Disconnect Isolating a Resistor LOGGING MULTIMETER 189 ach004f eps Figure 3 5 Resistance Measurement ...

Page 44: ...t resistance measurements 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 ...

Page 45: ...unctions 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 Sie...

Page 46: ... MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac dc ac dc F nS mA mA A mV V mV V OFF C A A A A mA COM V TEMPERATURE A MIN MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac dc ac dc F nS mA mA A mV V mV V OFF C A A A A mA COM V TEMPERATURE A AutoHOLD LOGGING SAVE CANCEL FAST MN MX SETUP YES NO 1000V 400mA FUSED 10A MAX FUSED CAT CLEAR MEM VIEW ON closed For in circuit tests turn circuit power off OFF ope...

Page 47: ...AST MN MX SETUP YES NO 1000V 400mA FUSED 10A MAX FUSED CAT CLEAR MEM VIEW nS Press twice to select nS LOGGING MULTIMETER 189 ach023f eps Figure 3 7 Conductance Measurement The following are some tips for measuring conductance High resistance readings are susceptible to electrical noise Use averaging to smooth out most noisy readings press M until AVG appears in the display There is normally a resi...

Page 48: ...ing the resulting voltage then calculating the capacitance Capacitors larger than 100 µF 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 µF 10 µF 100 µF 1 mF 10 mF and 50 mF 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 c...

Page 49: ...ltage 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...

Page 50: ... 400mA FUSED 10A MAX FUSED CAT CLEAR MEM VIEW MIN MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac dc ac dc F nS mA mA A mV V mV V OFF C A A A A mA COM V TEMPERATURE A MIN MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac dc ac dc F nS mA mA A mV V mV V OFF C A A A A mA COM V TEMPERATURE A AutoHOLD LOGGING SAVE CANCEL FAST MN MX SETUP YES NO 1000V 400mA FUSED 10A MAX FUSED CAT CLEAR MEM VIEW Typical Read...

Page 51: ...t 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 Frequency N FAST MN MX O M Ranging R WWarning To avoid the potential for fire or electrical shock do not connect the thermocouples to electrically live circuits MIN MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac ...

Page 52: ...lugged 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 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 fo...

Page 53: ...r and restore the circuit to normal operation Input Alert Feature If a test lead is plugged into the mA µA 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 LEAd5 This Input Alert warning is intended to stop you from attempting to measure voltage continuity resistance capacitance ...

Page 54: ...g the Fuses in Chapter 6 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 µA 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 b...

Page 55: ... MIN MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac dc ac dc F nS mA mA A mV V mV V OFF C A A A A mA COM V TEMPERATURE A AutoHOLD LOGGING SAVE CANCEL FAST MN MX SETUP YES NO 1000V 400mA FUSED 10A MAX FUSED CAT CLEAR MEM VIEW MIN MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac dc ac dc F nS mA mA A mV V mV V OFF C A A A A mA COM V TEMPERATURE A MIN MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac dc ac d...

Page 56: ...rent in the secondary display ac over dc Press a second time to reverse the displays dc over ac In either of these states the following pushbutton functions are not available Display hold Q AutoHOLD O Q MIN MAX M FAST MN MX O M Hz N Relative D LOGGING and SAVE Model 189 Press a third time to display the ac dc rms value in the primary display FAST MN MX is unavailable in this state Press a fourth t...

Page 57: ...B ac dc ac dc ac dc ac dc F nS mA mA A mV V mV V OFF C A A A A mA COM V TEMPERATURE A AutoHOLD LOGGING SAVE CANCEL FAST MN MX SETUP YES NO 1000V 400mA FUSED 10A MAX FUSED CAT Circuit Power OFF to connect meter ON for measurement OFF to disconnect meter Current through one component Total current to circuit ac dc mA A ac dc mA A LOGGING MULTIMETER 189 ach007f eps Figure 3 12 DC Current Measurement ...

Page 58: ...ure 3 13 highlights the function selections that allow frequency measurement To measure frequency select an appropriate function connect the meter signal source and press N 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 dB dB ac dc ac dc ac dc ac dc F nS CLEAR MEM V mA A mV V mV OFF VIEW MEM C A A mA...

Page 59: ... of the meter If a reading 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 ...

Page 60: ...24 Slope Trigger Point Slope Trigger Point 30 Above Trigger Point 100 Slope Trigger Point Slope Trigger Point 70 Below Trigger Point 100 Measures Positive Pulse Measures Negative Pulse tc009f eps Figure 3 15 Duty Cycle Measurements ...

Page 61: ...hing 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 M until the AVG annunciator comes on and the average reading appears in the secondary display Measuring Pulse Width The ...

Page 62: ...rs Manual 3 26 Slope Trigger Point Pulse Width Period Period Slope Trigger Point Pulse Width Start and Stop on Positive Slope Start and Stop on Negative Slope 1 Frequency tc020f eps Figure 3 17 Pulse Width Measurements ...

Page 63: ...ss N two more times As with the duty cycle function you can select which level the meter uses by pressing to trigger on the positive slope or to trigger on the negative slope A typical pulse width display is shown in Figure 3 18 You can improve pulse width stability by selecting the averaging feature Press M until AVG appears in the display tc028f eps Figure 3 18 Pulse Width Display ...

Page 64: ...Model 187 189 Users Manual 3 28 ...

Page 65: ...t can be set using the meter or FlukeView Forms You can view the average reading for each logging 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...

Page 66: ...selected the saved reading will contain the saved dB value Starting Logging To begin logging press O D LOGGING is shown on the display The logging interval 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 ...

Page 67: ...n the rotary switch to the VIEW MEM position 3 The primary display shows memory data Refer to Figure 4 1 for an explanation of the VIEW MEM display 4 If the primary display data is a logged reading appears in the display You can switch between the two types of memory data Press R SAVE for saved reading Press D LOGGING for logged reading To view more detailed logged reading information use FlukeVie...

Page 68: ...ower index numbers Z symbol Hazardous voltage could be present at inputs Identifies that the average of a logging interval is displayed When off a saved reading is displayed Memory data Shows logged readings or secondary readings Time display Indicates a time stamp f off or elapsed time f on display MEM On during View memory Index number Identifies the data entry being viewed ...

Page 69: ...ot begin logging press 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 communicatio...

Page 70: ...Model 187 189 Users Manual 4 6 ...

Page 71: ...lecting Setup Options To enter the Setup mode turn the meter on and press O T SETUP In the Setup mode each press of O T 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 fo...

Page 72: ... or decrement digit Use to select digit Selected digit flashes 000 0 C or F L Int Model 189 only Log interval MM SS Use q to increment or decrement minute or second values Use to select minute or seconds Selected values flash 15 00 dbrEF AC volts or selected dB type dBm or dBV m or V flashing Use to select dBV dbrEF AC volts or and dBm selected dBm reference 0001 Ω to 1999 Ω Use q to increment or ...

Page 73: ...ond values Use to select minutes or seconds Selected values flash Setting value to 00 00 disables timeout 15 00 Pr0FF Power off time out HH MM Use q to increment or decrement hour or minute values Use to select hours or minutes Selected values flash 00 15 Hour 24 hour clock HH MM Use q to increment or decrement hour or minute values Use to select hours or minutes Selected values flash 00 00 50 60 ...

Page 74: ...ction by pressing O T 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 1 Turn the rotary switch to temperature w 2 Connect the temperature probe and probe adapter to the and V inputs on the meter 3 Place the temperature probe and an accurate thermometer in a lag bath i e a container ...

Page 75: ...re on the primary display matches the temperature indicated by the lag bath thermometer 1 Press s to advance to the next digit and press T l to go back to the previous digit 2 Press or to increase or decrease the digit value 3 Save changes by pressing O T 4 Press O N to exit Setup tc041f eps Figure 5 1 Adjusting Temperature Offset ...

Page 76: ...its or 88888 for 4 1 2 digits appears in the display 2 To change the selection press T l or s 3 Press O then T to save the selection and proceed to the next setup selection Setting the Power Off Timeout 1 Press O T until Pr0FF appears in the 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 hour...

Page 77: ...in the lower right corner of the display begin flashing 2 Press or to increase or decrease the hour value 3 Press s to advance to the minute setting the minute digits begin flashing 4 Press or to increase or decrease the minute value 5 Press O T to store the selection and proceed to the next selection Setting the Line Main Frequency Although the meter operates on battery power only it is important...

Page 78: ... the factory defaults you cannot specify individual choices 3 Press O T to exit the setup procedure and activate your selection If you selected yE5 in step 2 all factory settings are restored If you selected no selections made in the Setup mode become active Saving Setup Options At each setup option store your choice and advance to the next option by pressing O T If you are storing the last option...

Page 79: ...minals as follows 1 Turn the meter off and remove all test leads 2 Shake out any dirt that may be in the terminals 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 WWarning To avoid electrical shock or personal inj...

Page 80: ...ST MN MX YES NO CLEAR MEM VIEW SETUP 1000V 400mA FUSED 10A MAX FUSED CAT LOGGING MULTIMETER 189 MIN MAX HOLD REL ms Hz RANGE dB dB ac dc ac dc ac dc ac dc F nS mA mA A mV V mV V OFF C A A A A mA COM V TEMPERATURE A ac dc AutoHOLD LOGGING SAVE CANCEL FAST MN MX YES NO CLEAR MEM VIEW SETUP mA A mA A Replace F2 if or displayed Replace F1 if or displayed LOGGING MULTIMETER 189 ach038f eps Figure 6 1 T...

Page 81: ...lace the batteries as soon as the battery indicator B 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 2 Remove the battery door by using a standard blade screwdriver to turn the battery door screws one quarter turn counterclockwise 3 Replace the batteries and the battery door Secure the door by turning the sc...

Page 82: ...Model 187 189 Users Manual 6 4 F2 F1 tc037f eps Figure 6 2 Battery and Fuse Replacement ...

Page 83: ...y 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 by 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...

Page 84: ...11 376756 4 Fasteners Battery Fuse Access Door H12 H13 948609 2 Screws Phillip Head H4 H5 H6 H7 832246 4 AC70A Alligator Clip Black MP38 738047 1 AC70A Alligator Clip Red MP39 738120 1 TL71 Right Angle Test Lead Set MP34 802980 1 Getting Started Manual TM1 TM5 see footnote 5 CD ROM Contains Users Manual TM6 1576992 1 Getting Started Manual PNs English 1547486 French German Italian Dutch 1555282 Da...

Page 85: ...1 1993 Surge Protection 8 kV peak per IEC 1010 1 92 WFuse Protection for mA or µA inputs WFuse Protection for A input 0 44 A 44 100 A 440 mA 1000 V FAST Fuse 11 A 1000 V FAST Fuse Markings P UL TÜV and OVERVOLTAGE Installation Categories refer to the level of Impulse Withstand Voltage protection provided at the specified Pollution Degree Overvoltage Category III equipment is equipment in fixed ins...

Page 86: ...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 III 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 II instruments Electromagnetic Compatibility EMC Susceptibility and Emissions Commercial...

Page 87: ...er selectable impedance references for dBm AutoHOLD Holds readings on display Continuity Open test Beeper sounds for resistance readings below threshold 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 FAST MN MX with 24 hour time stamp Record maximum minimum and average v...

Page 88: ...apacitance 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 Rea...

Page 89: ...kHz 20 45 Hz 1 kHz 10 kHz 10 kHz 20 kHz 20 kHz 100 kHz AC mV 1 2 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 0 mV 0 1 mV 0 4 40 2 80 0 4 40 1 5 40 8 40 AC V 1 2 5 0000 V 0 0001 V 0 4 40 2 80 0 4 40 1 5 40 8 40 50 000 V 0 001 V 0 4 40 2 80 0 4 40 1 5 40 8 40 500 00 V 0 01 V 0 4 40 2 80 0 4 40 Not specified Not specified 1000 0 V 0 1 V 0 4 40 ...

Page 90: ...5 20 6 40 5 000 0 µA 0 1 µA 0 75 5 1 5 0 75 10 2 40 AC mA 50 000 mA 0 001 mA 0 75 20 1 20 0 75 20 9 40 400 00 mA 0 01 mA 0 75 5 1 5 1 5 10 4 40 AC A 5 0000 A 0 0001 A 1 5 20 1 5 20 6 40 Not specified 10 000 A 1 0 001 A 1 5 5 1 5 5 5 10 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 ...

Page 91: ... V 0 1 2 2 Not specified 1000 0 V 0 1 V 0 1 2 2 2 80 0 5 40 Not specified DC µA 500 00 µA 0 01 µA 0 25 20 1 20 1 0 20 2 40 5 000 0 µA 0 1 µA 0 25 2 1 10 0 75 10 2 40 DC mA 50 000 mA 0 001 mA 0 15 10 1 20 0 75 20 2 40 400 00 mA 0 01 mA 0 15 2 1 10 1 10 3 40 DC A 5 0000 A 0 0001 A 0 5 10 2 20 2 20 6 40 10 000 A 1 0 001 A 0 5 2 1 5 10 1 5 10 5 10 1 10 A continuous up to 35 C less than 10 minutes 35 C...

Page 92: ... 0 1 MΩ 3 0 2 4 50 0 MΩ up to 100 0 MΩ 0 1 MΩ 3 0 2 4 100 0 MΩ up to 500 0 MΩ 0 1 MΩ 10 0 2 4 Conductance 50 00 nS 0 01 nS 1 10 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 MΩ and 2 5 over 10 MΩ 3 Using relative mode REL to zero residual reading 4 To ensure stated accuracy switch to c...

Page 93: ...F 0 001 µF 10 00 µF 0 01 µF 100 0 µF 0 1 µF 1 000 µF 1 µF 10 0 mF 0 01 mF 50 00 mF 0 01 mF 3 3 10 Diode Test 1 3 1000 V 0 0001 V 2 20 1 For the 5 000 count mode divide the number of least significant digits counts by 10 2 For film capacitor or better using Relative mode REL to zero residual on 1 000 nF and 10 00 nF ranges 3 Least significant digit not active above 10 mF ...

Page 94: ...and inputs 25 of range FAST MN MX 250 µs 4 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 1 Reading will be 0 00 for signals below 0 5 Hz 2 Accuracy specification is relative to the user adjustable temperature offset and assumes ambient temperature stable to 1 C 3 For ambient temperature changes of 5 C ra...

Page 95: ... 950 kHz 1 4 V 2 0 V 14 kHz 50 V 5 V 5 0 V 1 MHz 0 5 V 6 5 V 400 kHz 500 V 20 V 20 V 1 MHz 5 V 65 V 400 kHz 1000 V 100 V 100 V 400 kHz 5 V 65 V 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 107 V Hz product RMS sine wave Bu...

Page 96: ...Rejection DC Volts mV 100 dB at dc 50 Hz or 60 Hz 0 1 90 dB at 50 Hz or 60 Hz 0 1 AC Volts mV 90 dB dc to 60 Hz Full Scale Voltage Open Circuit Test Voltage To 5 MΩ 30 MΩ nS Ohms 5 V 500 mV 3 1 V Diode Test 5 V 3 1000 V Typical Short Circuit Current 500 Ω 5 kΩ 50 kΩ 500 kΩ 5 MΩ 30 MΩ Ohms 1 mA 100 µA 10 µA 1 µA 0 1 µA 0 1 µA Diode Test 1 mA typical ...

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