Fluke 289 User Manual
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Fluke 289 User Manual

True-rms digital multimeters
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True-rms Digital Multimeters
Users Manual
June 2007, Rev. 2, 3/09
© 2007, 2008 Fluke Corporation. All rights reserved. Specifications subject to change without notice.
All product names are trademarks of their respective companies.

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  • Page 1 ® 287/289 True-rms Digital Multimeters Users Manual June 2007, Rev. 2, 3/09 © 2007, 2008 Fluke Corporation. All rights reserved. Specifications subject to change without notice. All product names are trademarks of their respective companies.

  • Page 2: Lifetime Limited Warranty

    Lifetime Limited Warranty Each Fluke 20, 70, 80, 170, 180 and 280 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.

  • Page 3: Table Of Contents

    Table of Contents Title Page Lifetime Limited Warranty....................ii Introduction ........................1 Contacting Fluke ......................1 Safety Information ......................1 Hazardous Voltage......................3 Symbols ......................... 4 Features ......................... 5 Understanding the Push Buttons ................5 Using Auto Repeat ....................6 Understanding the Display ..................
  • Page 4 287/289 Users Manual Powering the Meter On and Off Manually ..............12 Battery Level Indicator ....................12 Automatic Power-Off ....................12 Battery Saver Mode ....................12 Controlling the Backlight ................... 13 Selecting the Range ...................... 13 Understanding Function Menus ..................13 Input Alert™...
  • Page 5 (continued) Contents Measuring Frequency....................42 Measuring Duty cycle ....................43 Measuring Pulse Width....................45 Changing Meter Setup Options ..................47 Resetting Meter Setup Options.................. 47 Setting Display Contrast .................... 47 Setting the Meter’s Language..................47 Setting Date and Time....................48 Setting Backlight and Auto Off Timeouts ..............
  • Page 6 287/289 Users Manual Maintenance ........................57 General Maintenance....................57 Testing the Fuses...................... 57 Replacing the Batteries ..................... 59 Replacing the Fuses ....................59 Test Lead Storage..................... 59 In Case of Difficulty ......................61 Service and Parts ......................62 General Specifications ....................66 Detailed Specifications....................
  • Page 7 List of Tables Table Title Page Symbols..........................4 Push Buttons ......................... 5 Display Features ........................7 Rotary Switch Positions......................10 Input Terminals........................11 Battery Level Indicator......................12 Trend Data Display........................ 51 Recording Display ......................... 53 Stopped Recording Display ....................55 Error Messages ........................
  • Page 8 287/289 Users Manual...
  • Page 9 List of Figures Figure Title Page Push Buttons ......................... 5 Display Features ........................7 Rotary Switch ........................10 Input Terminals........................11 Function Menu........................14 MIN MAX Record Display...................... 17 Peak Record Display ......................18 Low Pass Filter ........................20 Relative Mode Functions ....................... 21 AC Voltage Measurements....................
  • Page 10 287/289 Users Manual Conductance Measurement ....................34 Capacitance Measurement ....................35 Diode Testing........................37 Current Measurement Setup....................40 Current Measurement Circuit Connection ................41 Functions Allowing Frequency Measurement ............... 42 Frequency Display ........................ 43 Duty Cycle Measurements ....................44 Duty Cycle Display ........................ 45 Pulse Width Measurements ....................

  • Page 11: Introduction

    Meter, Singapore : +65-738-5655 the equipment under test, or cause permanent loss of data. Anywhere in the world: +1-425-446-5500 XWWarning Visit Fluke's web site at: www.fluke.com Register your Meter at: http://register.fluke.com To avoid possible electric shock or personal...
  • Page 12 287/289 Users Manual Make sure the battery door is closed and When making electrical connections, connect latched before operating the Meter. the common test lead before connecting the live test lead; when disconnecting, disconnect Remove test leads from the Meter before the live test lead before disconnecting the opening the battery door.

  • Page 13: Hazardous Voltage

    True-rms Digital Multimeters Hazardous Voltage Use proper protective equipment, as required Do not remove batteries while the Meter is by local or national authorities when working turned on or a signal is applied to the Meter’s in hazardous areas. input jacks. Comply with local and national safety Before measuring current, check the Meter's requirements when working in hazardous...

  • Page 14: Symbols

    Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for recycling information.

  • Page 15: Features

    True-rms Digital Multimeters Features Table 2. Push Buttons Features Button Function Tables 2 through 5 briefly describe the Meter’s features. Understanding the Push Buttons Turns the Meter on or off. The 14 push buttons on the front of the Meter activate features Selects sub-functions and modes related that augment the function selected using the rotary switch, to the rotary switch function.

  • Page 16: Using Auto Repeat

    287/289 Users Manual Using Auto Repeat For some menu selections, holding down a softkey or cursor button will continuously change (or advance) a selection until the button is released. Normally, each press of a button causes the selection to change once. During some selections, the selections will change faster if the button is held for two or more seconds.

  • Page 17: Understanding The Display

    True-rms Digital Multimeters Features Understanding the Display Table 3. Display Features Display features shown in Figure 2 are described in Table 3 and Item Function Indication the following sections. Softkey labels Indicates the function of the button just below the displayed label. Bar graph Analog display of the input signal (See the “Bar Graph”...

  • Page 18: Bar Graph

    287/289 Users Manual Table 3. Display Features (cont.) Bar Graph The analog bar graph functions like the needle on an analog Item Function Indication meter, but without the overshoot. The bar graph updates 30 times per second. Because the graph updates faster than the Mini- Displays the lightning bolt (when digital display, it is useful for making peak and null adjustments...

  • Page 19: Page Area

    True-rms Digital Multimeters Features The mini-measurement display shows the measurement value of the primary function, if it is not already shown in the page area of the display. For example, when the display is frozen for a HOLD, the mini-measurement display continues to show the input signal (Live) measurement and a mini z.

  • Page 20: Understanding The Rotary Switch

    287/289 Users Manual Understanding the Rotary Switch Table 4. Rotary Switch Positions Select a primary measurement function by positioning the rotary Switch switch to one of the icons around its perimeter. For each Function Position function, the Meter presents a standard display for that function (range, measurement units, and modifiers).

  • Page 21: Using The Input Terminals

    True-rms Digital Multimeters Features Using the Input Terminals Table 5. Input Terminals All functions except current use the W and COM input Terminal Description terminals. The two current input terminals (A and mA/ A) are used as follows: Input for 0 A to 10.00 A current (20VA overload for 30 seconds on, 10 minutes off), €...

  • Page 22: Controlling Meter Power

    287/289 Users Manual Controlling Meter Power Table 6. Battery Level Indicator The Meter is powered by six AA batteries and controlled through Indication Battery Capacity a front panel power switch and internal circuits designed to help conserve battery power. The following sections describe several Full capacity techniques for controlling Meter power.

  • Page 23: Controlling The Backlight

    True-rms Digital Multimeters Selecting the Range recording mode, the time period is five minutes. For MIN MAX, Selecting the Range Peak and AutoHold modes, the time period is the same time the Auto Off feature is set for. See the “Setting Backlight and Auto The Meter’s selected range is always displayed above the right- Off Timeouts”...
  • Page 24 287/289 Users Manual In most cases, the softkeys revealed by the menu selection act Menu like toggles. The example menu shown in Figure 5 shows REL, REL%, and Close softkeys. In this example, the Meter is not in Hz, %, mS the relative mode, so pressing the softkey labeled REL would activate, or toggle, the relative mode.

  • Page 25: Input Alert™ Feature

    True-rms Digital Multimeters Input Alert™ Feature press 5 to scroll the screen horizontally and reveal the off-screen The information revealed through I is not meant to replace menu items. Conversely, with the menu selector on an item in the more detailed information found in this manual. Function and the right-hand column, press 6 to reveal the off-screen menu feature explanations are brief and only meant to refresh a items.

  • Page 26: Measuring Crest Factor

    287/289 Users Manual out open lead conditions so the Meter leads can be moved crest factor value is displayed in the primary display while the ac between test points without triggering a display update. measurement appears in the secondary display. Frequency, duty cycle, and pulse width are not allowed during crest factor Note measurements.
  • Page 27 True-rms Digital Multimeters Capturing Minimum and Maximum Values Note 8:10pm 06/07/07 Min Max For input signals that are noisy or change rapidly, turn on the Smoothing mode to display a steadier reading. 119.81 See the “Enabling and Disabling the Smoothing Mode” section later in this manual.

  • Page 28: Capturing Peak Values

    287/289 Users Manual the softkey labeled Save to store the MIN MAX screen data. MIN 8:10pm 06/07/07 MAX can not be continued at this point. Press the softkey labeled Peak Close to exit the MIN MAX mode. 119.8 Pressing the softkey labeled Restart while MIN MAX is running stops the MIN MAX session, discards all MIN MAX data, and immediately starts a new MIN MAX recording session.
  • Page 29 True-rms Digital Multimeters Capturing Peak Values Pressing the softkey labeled Stop ends the peak recording session. The summary information in the display freezes and the softkeys change function to allow saving the collected data. Pressing the softkey labeled Close exits the peak recording session without saving the collected data.

  • Page 30: Low Pass Filter (Model 289 Only)

    287/289 Users Manual Low Pass Filter (Model 289 only) 1 kHz The Meter is equipped with an ac low pass filter. When measuring ac voltage, or Vac frequency, press the softkey 100 Hz labeled Menu to open the function menu, and move the menu selector to the l item.

  • Page 31: Making Relative Measurements

    True-rms Digital Multimeters Making Relative Measurements Making Relative Measurements secondary display. The present or “Live” measurement moves to the secondary display and the primary display indicates the difference between the present measurement and the reference The Meter displays calculated values that are based on a stored value in measurement units for REL and as a percentage for value when set to relative and relative percent mode.

  • Page 32: Making Measurements

    287/289 Users Manual Making Measurements The following sections describe how to take measurements with the Meter. 08:10pm 03 / 13/ 06 123.45 Measuring AC Voltage Auto Range 500 VAC The Meter displays ac voltage measurements as rms (root mean square) readings. The rms value is the equivalent dc voltage that Menu Save Setup...

  • Page 33: Using Loz For Voltage Measurements (Model 289 Only)

    True-rms Digital Multimeters Making Measurements Using LoZ for Voltage Measurements (Model 8:10pm 06/13/07 289 only) W Caution 41.83 Do not use the LoZ mode to measure voltages in circuits that could be damaged by this mode’s low Auto Range impedance ( 3 k ). 500 VAC To eliminate ghost voltages, the Meter’s LoZ function presents a 123.45...
  • Page 34 287/289 Users Manual To select another reference value, press the softkey labeled Ref to display a message box with the current reference value. Pressing 7 or 8, scrolls through the nine predefined references: 4, 8, 16, 25, 32, 50, 75, 600, and 1000. Set the reference by pressing the softkey labeled OK.

  • Page 35: Measuring Dc Voltage

    True-rms Digital Multimeters Making Measurements Measuring DC Voltage The Meter displays dc volts values as well as their polarity. The bar graph for dc voltage measurements is a zero-centered bar 8:10pm 06/13/07 graph. Positive dc voltages cause the bar graph to fill to the right 9.752 of center while negative dc voltages fill left of center.

  • Page 36: Measuring Ac And Dc Signals

    287/289 Users Manual Measuring AC and DC Signals indicate AC+DC (F1), AC,DC (F2), and DC,AC (F3). Press the softkey that presents these two signals as needed. The Meter is capable of displaying both ac and dc signal While in any of the three AC+DC modes, peak measurements, components (voltage or current) as two separate readings or one frequency, duty cycle, and period measurements are not AC+DC (rms) value combined.
  • Page 37 True-rms Digital Multimeters Making Measurements only when both the ac and dc signals drop below 10% of the present range. For AC+DC, ranging is controlled by the underlying values of the ac and dc signals and not by the sum of the AC+DC calculation.

  • Page 38: Measuring Temperature

    287/289 Users Manual Measuring Temperature XW Warning 8:10pm 06/13/07 26.5 To avoid the potential for fire or electric shock, do not connect the thermocouple to electrically live circuits. +8.0 Offset Menu Save Offset Setup The Meter uses an 80BK-A Integrated DMM Temperature Probe or other type-K temperature probe for measuring temperature.

  • Page 39: Measuring Resistance

    True-rms Digital Multimeters Making Measurements To input a temperature offset value, press the softkey labeled Keep the following in mind when measuring resistance. Offset to open a message box with the present offset value. Use Because the meter’s test current flows through all possible paths 6 and 5 to position the cursor over one of the digits or the polarity between the probe tips, the measured value of a resistor in a sign.
  • Page 40 287/289 Users Manual In-Circuit Resistance Measurements Isolating a Potentiometer Circuit Power 8:10pm 06/13/07 5.67 Auto Range Menu Save Setup Disconnect Isolating a Resistor Disconnect est11.eps Figure 15. Resistance Measurement...

  • Page 41: Using The Y Function (Model 289 Only)

    True-rms Digital Multimeters Making Measurements measurement response of the Meter will not appear in the digital Using the Function (Model 289 Only) display. Therefore, the continuity function uses a graphical indicator for the presence or absence of continuity. Figure 16 W Caution shows the short and open continuity indication.
  • Page 42 287/289 Users Manual For in-circuit tests, turn circuit power off. Beep on short Beep on open 8:10pm 06/13/07 8:10pm 06/13/07 5.67 Continuity Continuity Beep on SHORT Beep on OPEN Menu Save Setup Menu Save Setup (closed) (open) (open) (closed) est13.eps Figure 17.
  • Page 43 True-rms Digital Multimeters Making Measurements To change whether the beeper sounds on shorts or opens, press the softkey labeled Menu. Move the menu selector to the menu item labeled Beeper and press the softkey labeled Short/O…. This beeper selection, Beep on Short or Beep on Open, is displayed just above the continuity indicator.

  • Page 44: Using Conductance For High Resistance Tests

    287/289 Users Manual 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 8:10pm 06/13/07 values of resistance. 26.55 Manual Range The unit of conductance is the Siemens (S). The meter’s 50 nS 50 nS range measures conductance in nanosiemens (1 nS = 0.000000001 Siemens).

  • Page 45: Measuring Capacitance

    True-rms Digital Multimeters Making Measurements Measuring Capacitance W Caution 8:10pm 06/13/07 To avoid possible damage to the meter or to the 26.52 equipment under test, disconnect circuit power Auto Range 100 uF and discharge all high-voltage capacitors before measuring capacitance. Use the dc voltage Menu Save Setup...

  • Page 46: Testing Diodes

    287/289 Users Manual To measure capacitance, position the rotary switch to P and set sends a current through a semiconductor junction, and then up the Meter as shown in Figure 19. If the display doesn’t measures the junction’s voltage drop. A typical junction drops already indicate the Meter is measuring capacitance, press the 0.5 V to 0.8 V.
  • Page 47 True-rms Digital Multimeters Making Measurements Typical Reading 8:10pm 06/13/07 8:10pm 06/13/07 .567 Manual Range Manual Range 5 VDC 5 VDC Reverse Bias Menu Save Setup Menu Save Setup Forward Bias est16.eps Figure 20. Diode Testing...

  • Page 48: Measuring Current

    287/289 Users Manual Insert the black lead into the COM terminal. Insert the red Measuring Current lead in an input appropriate for the measurement range. XW Warning Note To avoid damage to the Meter and possible injury, To avoid blowing the Meter’s 440 mA fuse, use the never attempt an in-circuit current measurement mA/ A terminal only if you are sure the current is less where the open-circuit potential to earth is greater...
  • Page 49 True-rms Digital Multimeters Making Measurements Note While in a current measurement function, the Meter will stay in the selected AC or DC current measurement mode when switching between n and € . Whenever switched to one of the current measurement functions, the Meter will default to the last current type selected (AC or DC).
  • Page 50 287/289 Users Manual 8:10pm 06/13/07 8:10pm 06/13/07 8:10pm 06/13/07 mAAC uAAC 2.5527 19.783 4.863 Auto Range Auto Range Auto Range 5 AAC 5 AAC 5 AAC Menu Save Setup Menu Save Setup Menu Save Setup est18.eps Figure 21. Current Measurement Setup...
  • Page 51 True-rms Digital Multimeters Making Measurements Total current to circuit Circuit Power: OFF to connect meter. 8:10pm 06/13/07 ON for measurement. mAAC OFF to disconnect meter. Current through one component est19.eps Figure 22. Current Measurement Circuit Connection...

  • Page 52: Measuring Frequency

    287/289 Users Manual Figure 23 highlights the functions that allow frequency Caution measurements. 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.

  • Page 53: Measuring Duty Cycle

    True-rms Digital Multimeters Making Measurements selector to the menu item labeled Hz,%,ms. Next press the Selection between a rising trigger c or falling trigger dedge is softkey labeled Hz. performed by pressing the softkey labeled c d. This softkey toggles the trigger setting between the two selections. 8:10pm 06/13/07 The following are tips for frequency measurements:...
  • Page 54 287/289 Users Manual Measures Positive Pulse Trigger Level 30% Above Trigger Level 100% Measures Negative Pulse Trigger Level 70% Below Trigger Level 100% est28.eps Figure 25. Duty Cycle Measurements...

  • Page 55: Measuring Pulse Width

    True-rms Digital Multimeters Making Measurements volts or amps value of the input signal. The bar graph tracks the To measure duty cycle, position the rotary switch on one of the volts or amps value of the signal and not the duty cycle value. functions allowing frequency measurements shown in Figure 23.
  • Page 56 287/289 Users Manual Measure Positive Pulse Width Trigger Level Pulse Width Period = Frequency Measure Negative Pulse Width Trigger Level Pulse Width Period est27.eps Figure 27. Pulse Width Measurements...

  • Page 57: Changing Meter Setup Options

    True-rms Digital Multimeters Changing Meter Setup Options Note The primary display indicates the input signals pulse width in milliseconds. The frequency of the signal is displayed in the A setup reset also resets the temperature offset and secondary display. The mini-measurement display indicates the dBm reference to their default value.

  • Page 58: Setting Date And Time

    287/289 Users Manual Setting Date and Time timeout is set to a value other than Off. For MIN MAX, Peak, and AutoHold, the timeout is the time period set for Auto Off. The Meter’s internal clock is used in the display and for time- Setting a Custom dBm Reference stamping recorded measurements.

  • Page 59: Enabling And Disabling The Smoothing Mode

    As new Meter features are created, the latest version of software the same name. For example, one preset name is Save. The first can be downloaded to the Meter from Fluke’s support web page time a save operation is performed with that name, Save-1 is using the Software Update option.

  • Page 60: Viewing Memory Data

    287/289 Users Manual saved under the name of Save-2. The auto-incrementing number If there are previously stored records, press the softkey labeled can be reset to 1 by positioning the menu selector next to the Prev or 5 to page back through previously stored records. Press save name and then pressing the softkey labeled Reset #.

  • Page 61: Zooming In On Trend Data

    True-rms Digital Multimeters Using Memory Note Elapsed time. Units in hours and minutes, or minutes and seconds. X-axis time labels are shown in elapsed time while the timestamp shown under the cursor is an absolute time Time scale legend (HH:MM or MM:SS) Measured value and timestamp of selected Table 7.

  • Page 62: Recording Measurement Data

    287/289 Users Manual softkeys labeled Prev and Next to select an item for deletion. Event records are triggered by the measured signal varying more Next, press the softkey labeled Delete. A message asking to than an adjustable percentage of the value measured at the start confirm the deletion will appear before anything is deleted from of the record.

  • Page 63: Setting Up A Recording Session

    True-rms Digital Multimeters Recording Measurement Data Table 8. Recording Display Recording session duration expiring. Manually stopping the recording session. 8:10pm 06/13/07 123.45 VAC Setting up a Recording Session Recording Before starting a recording session, setup the Meter for the 1.75 measurements to be recorded.

  • Page 64: Setting The Event Threshold Value

    287/289 Users Manual The Meter allocates memory in such a way as to guarantee values. With the desired value selected, press the softkey capturing all of the user-specified sample intervals. Event labeled Close. records will also be captured until the Meter detects the allocated Starting a Recording Session memory has been used up.

  • Page 65: Using Communications

    True-rms Digital Multimeters Using Communications Table 9. Stopped Recording Display Using Communications You can use the IR communication link and FlukeView Forms software to transfer the contents of a meter’s memory to a PC. When using a PC-to-meter IR (infrared) communication link, refer 8:10pm 123.45 VAC 06/13/07...

  • Page 66: Error Messages

    287/289 Users Manual Error Messages Table 10 list some of the error messages the Meter may display and the conditions that may be causing the error. Table 10. Error Messages Message Conditions Leads connected incorrectly. rotary switch not in corresponding A/mA or A Lead in A or mA/ A jack but position Leads in both A and mA/ A jacks.

  • Page 67: Maintenance

    To prevent damage or injury, install only Fluke specified replacement Turn the Meter off and remove all test leads. fuses with the amperage, voltage, and speed ratings shown in Table 11.
  • Page 68 287/289 Users Manual 8:10pm 06/13/07 8:10pm 06/13/07 Replace F1 if Replace F2 if 10.000 0.50 reading is OL reading is OL Menu Menu est33.eps Figure 28. Testing the Current Fuses...

  • Page 69: Replacing The Batteries

    Remove the fuse by gently prying one end loose, then sliding the fuse out of its bracket. Install only Fluke specified replacement fuses with the est41.eps amperage, voltage, and interrupt ratings shown in Table 11. Figure 29. Test Lead Storage Reinstall the battery door assembly and secure it by turning the screw one-half turn clockwise.
  • Page 70 287/289 Users Manual 11 A 0.44 A est32.eps Figure 30. Replacing Batteries and Fuses...

  • Page 71: In Case Of Difficulty

    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.

  • Page 72: Service And Parts

    287/289 Users Manual Service and Parts Replacement parts and accessories are shown in Tables 11 and 12 and Figure 31. To order parts and accessories, refer to the “Contacting Fluke” section. Table 11. Replacement Parts Fluke Part/Model Item Description Qty.
  • Page 73 Alligator Clips, one black and one red 1670641 (Red) Manual, Manual Pack, Fluke 287/289 2748851 287/289 Users Manual CD 2748872 To ensure safety, use exact replacement only. [1] The Users and Getting Started manuals are available through www.Fluke.com. Click on Support and then Product Manuals.
  • Page 74 287/289 Users Manual 4 PL 2 PL 6 PL est40.eps Figure 31. Replaceable Parts...

  • Page 75: Accessories

    Carrying Case, Soft TL76 4 mm Diameter Test Leads TL220 Industrial Test Lead Set TL224 Test Lead Set, Heat-Resistant Silicone Test Probes, Flat Blade, Slim Reach Test Probes, 4 mm diameter, Slim Reach Fluke accessories are available from an authorized Fluke distributor.

  • Page 76: General Specifications

    Maximum voltage between any Terminal and Earth Ground: 1000 V W Fuse Protection for mA or A inputs .....0.44 A (44/100 A, 440 mA), 1000 V FAST Fuse, Fluke specified part only W Fuse Protection for A input......11 A, 1000 V FAST Fuse, Fluke specified part only Battery Type ............6 AA Alkaline batteries, NEDA 15A IEC LR6...

  • Page 77: Detailed Specifications

    True-rms Digital Multimeters Detailed Specifications Electromagnetic Compatibility Standards (EMC) European EMC............EN61326-1 Australian EMC ...........; N10140 US FCC ...............FCC CFR47: Part 15 CLASS A š Certifications ............UL, CE, CSA, ; (N10140), Detailed Specifications Accuracy: 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 ] ).

  • Page 78: Ac Voltage Specifications

    287/289 Users Manual AC Voltage Specifications Accuracy Function Range Resolution 20 to 45 Hz 45 to 65 Hz 65 Hz to 10 kHz 10 to 20 kHz 20 to 100 kHz AC mV 50 mV 0.001 mV 1.5 % + 60 0.3 % + 25 0.4 % + 25 0.7 % + 40...

  • Page 79: Ac Current Specifications

    True-rms Digital Multimeters Detailed Specifications AC Current Specifications Accuracy Function Range Resolution 20 to 45 Hz 45 to 1 kHz 1 to 20 kHz 20 to 100 kHz AC A 500 A 0.01 A 1 % + 20 0.6 % + 20 0.6 % + 20 5 % + 40 1 % + 5...

  • Page 80: Dc Voltage Specification

    287/289 Users Manual DC Voltage Specification Accuracy Function Range Resolution AC over DC, DC over AC, AC + DC 20 to 45 Hz 45 Hz to 1 kHz 1 to 20 kHz 20 to 35 kHz DC mV 50 mV 0.001 mV 0.05 % + 20 1.5 % + 40...

  • Page 81: Dc Current Specifications

    True-rms Digital Multimeters Detailed Specifications DC Current Specifications Accuracy AC over DC, DC over AC, AC + DC Function Range Resolution [1][3] 20 to 45 Hz 45 Hz to 1 kHz 1 to 20 kHz 20 to 100 kHz 0.075 % + 20 1 % + 20 0.6 % + 20 0.6 % + 20...

  • Page 82: Resistance Specifications

    287/289 Users Manual Resistance Specifications Function Range Resolution Accuracy [1][3] Resistance 0.001 0.15 % + 20 0.05 % + 10 0.01 0.05 % + 2 0.0001 k 0.05 % + 2 50 k 0.001 k 0.05 % + 2 500 k 0.01 k 0.15 % + 4 0.0001 M...

  • Page 83: Capacitance And Diode Test Specifications

    True-rms Digital Multimeters Detailed Specifications Capacitance and Diode Test Specifications Function Range Resolution Accuracy Capacitance 1 nF 0.001 nF 1 % + 5 10 nF 0.01 nF 1 % + 5 100 nF 0.1 nF 1 % + 5 0.001 F 1 % + 5 10 F 0.01 F...

  • Page 84: Frequency Counter Specifications

    287/289 Users Manual Frequency Counter Specifications Function Range Resolution Accuracy Frequency 99.999 Hz 0.001 Hz 0.02 % + 5 (0.5 Hz to 999.99 kHz, pulse 999.99 Hz 0.01 Hz 0.005 % + 5 width >0.5 s) 9.9999 kHz 0.0001 kHz 0.005 % + 5 99.999 kHz 0.001 kHz...

  • Page 85: Frequency Counter Sensitivity

    True-rms Digital Multimeters Detailed Specifications Frequency Counter Sensitivity Approximate Voltage Sensitivity Approximate DC (rms sine wave) Input Range AC Bandwidth DC Bandwidth Trigger Levels 15 Hz to 100 kHz 50 mV 5 mV 1 MHz 5 mV & 20 mV 600 kHz 500 mV 25 mV...

  • Page 86: Min Max, Recording, And Peak Specifications

    287/289 Users Manual MIN MAX, Recording, and Peak Specifications Function Nominal Response Accuracy Specified accuracy ±12 counts for changes >425 ms in duration in manual 200 ms to 80% (dc function) range. MIN MAX, Recording Specified Accuracy ±40 counts for changes >1.5 s in duration in manual 350 ms to 80 % (ac function) range.

  • Page 87: Input Characteristics

    True-rms Digital Multimeters Detailed Specifications Input Characteristics Common Mode Overload Rejection Ratio Function Input Impedance Normal Mode Rejection Protection (1 k unbalance) 1000 V 10 M <100 pF >120 dB at dc, 50 Hz or 60 Hz >60 dB at 50 Hz or 60 Hz 1000 V 10 M <100 pF >120 dB at dc, 50 Hz or 60 Hz >60 dB at 50 Hz or 60 Hz...

  • Page 88: Burden Voltage (A, Ma, A)

    287/289 Users Manual Burden Voltage (A, mA, A) Function Range Burden Voltage mA, A 500 A 102 V/ A 5000 A 102 V/ A 50.000 mA 1.8 mV/mA 400.00 mA 1.8 mV/mA 5.0000 A 0.04 V/A 10.000 A 0.04 V/A...

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