Fluke 289 Uživatelský manuál

® 287/289 True-rms Digital Multimeters Users Manual June 2007, Rev. 1, 7/08 © 2007, 2008 Fluke Corporation. All rights reserved. Specifications

287/289 Users Manual viii 18. Conductance Measurement...

1 Introduction XWWarning Read “Safety Information” before using this Meter. The descriptions and instructions in this manual apply to the model 289 a

287/289 Users Manual 2 • Make sure the battery door is closed and latched before operating the Meter. • Remove test leads from the Meter before open

True-rms Digital Multimeters Hazardous Voltage 3 • Use proper protective equipment, as required by local or national authorities when working

287/289 Users Manual 4 Symbols Table 1 lists and describes the symbols used on the Meter and in this manual. Table 1. Symbols Symbol Description Symb

True-rms Digital Multimeters Features 5 Features Tables 2 through 5 briefly describe the Meter’s features. Understanding the Push Buttons The

287/289 Users Manual 6 Using Auto Repeat For some menu selections, holding down a softkey or cursor button will continuously change (or advance) a sel

True-rms Digital Multimeters Features 7 Understanding the Display Display features shown in Figure 2 are described in Table 3 and the followin

287/289 Users Manual 8 Table 3. Display Features (cont.) Item Function Indication J Mini-measurement Displays the lightning bolt (when necessary) and

True-rms Digital Multimeters Features 9 The mini-measurement display shows the measurement value of the primary function, if it is not already

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.

287/289 Users Manual 10 Understanding the Rotary Switch Select a primary measurement function by positioning the rotary switch to one of the icons aro

True-rms Digital Multimeters Features 11 Using the Input Terminals All functions except current use the W and COM input terminals. The two cur

287/289 Users Manual 12 Controlling Meter Power The Meter is powered by six AA batteries and controlled through a front panel power switch and interna

True-rms Digital Multimeters Selecting the Range 13 recording mode, the time period is five minutes. For MIN MAX, Peak and AutoHold modes, the

287/289 Users Manual 14 VACMenuRELPeak, CFHz, %, mSdBmdBVREL REL% Close est05.eps Figure 5. Function Menu Menu selection is indicated by the filled-in

True-rms Digital Multimeters Input Alert™ Feature 15 press 5 to scroll the screen horizontally and reveal the off-screen menu items. Conversel

287/289 Users Manual 16 out open lead conditions so the Meter leads can be moved between test points without triggering a display update. Note For tem

True-rms Digital Multimeters Capturing Minimum and Maximum Values 17 Note For input signals that are noisy or change rapidly, turn on the Smoo

287/289 Users Manual 18 the softkey labeled Save to store the MIN MAX screen data. MIN MAX can not be continued at this point. Press the softkey label

True-rms Digital Multimeters Capturing Peak Values 19 Pressing the softkey labeled Stop ends the peak recording session. The summary informati

i Table of Contents Title Page Lifetime Limited Warranty...

287/289 Users Manual 20 Low Pass Filter (Model 289 only) The Meter is equipped with an ac low pass filter. When measuring ac voltage, or Vac frequency

True-rms Digital Multimeters Making Relative Measurements 21 Making Relative Measurements The Meter displays calculated values that are based

287/289 Users Manual 22 Making Measurements The following sections describe how to take measurements with the Meter. Measuring AC Voltage The Meter di

True-rms Digital Multimeters Making Measurements 23 Using LoZ for Voltage Measurements (Model 289 only) W Caution Do not use the LoZ mode to m

287/289 Users Manual 24 To select another reference value, press the softkey labeled Ref to display a message box with the current reference value. Pr

True-rms Digital Multimeters Making Measurements 25 Measuring DC Voltage The Meter displays dc volts values as well as their polarity. The bar

287/289 Users Manual 26 Measuring AC and DC Signals The Meter is capable of displaying both ac and dc signal components (voltage or current) as two se

True-rms Digital Multimeters Making Measurements 27 only when both the ac and dc signals drop below 10% of the present range. For AC+DC, rangi

287/289 Users Manual 28 Measuring Temperature XW Warning To avoid the potential for fire or electric shock, do not connect the thermocouple to electri

True-rms Digital Multimeters Making Measurements 29 To input a temperature offset value, press the softkey labeled Offset to open a message bo

287/289 Users Manual ii Controlling Meter Power ... 12

287/289 Users Manual 30 Menu5.67Save SetupAuto Range500 0 100 200 300 4008:10pm06/13/07132Circuit PowerOFFIn-Circuit Resistance MeasurementsDisconnect

True-rms Digital Multimeters Making Measurements 31 Using the Y Function (Model 289 Only) W Caution To avoid damaging the circuit under test,

287/289 Users Manual 32 Menu5.67Save SetupContinuityBeep on SHORT500 0 100 200 300 400MenuOLSave SetupContinuityBeep on OPEN500 0 100 200 300 4008:10p

True-rms Digital Multimeters Making Measurements 33 To change whether the beeper sounds on shorts or opens, press the softkey labeled Menu. Mo

287/289 Users Manual 34 Using Conductance for High Resistance Tests Conductance, the inverse of resistance, is the ability of a circuit to pass curren

True-rms Digital Multimeters Making Measurements 35 Measuring Capacitance W Caution To avoid possible damage to the meter or to the equipment

287/289 Users Manual 36 To measure capacitance, position the rotary switch to P and set up the Meter as shown in Figure 19. If the display doesn’t alr

True-rms Digital Multimeters Making Measurements 37 Menu.567VDCSave SetupManual Range5 VDC01234MenuOLVDCSave SetupManual Range5 VDC012348:10pm

287/289 Users Manual 38 Measuring Current XW Warning To avoid damage to the Meter and possible injury, never attempt an in-circuit current measurement

True-rms Digital Multimeters Making Measurements 39 Note While in a current measurement function, the Meter will stay in the selected AC or DC

Contents (continued) iii Measuring Current...

287/289 Users Manual 40 Menu2.5527AACSave SetupAuto Range5 AAC01234Menu19.783mAACSave SetupAuto Range5 AAC01234Menu4.863uAACSave SetupAuto Range5 AAC0

True-rms Digital Multimeters Making Measurements 41 mAAC8:10pm06/13/07Circuit Power: OFF to connect meter. ON for measurement. OF

287/289 Users Manual 42 W Caution Placing the probes across (in parallel with) a powered circuit when a lead is plugged into a current terminal can da

True-rms Digital Multimeters Making Measurements 43 selector to the menu item labeled Hz,%,ms. Next press the softkey labeled Hz. Menu60.050Hz

287/289 Users Manual 44 Trigger Level30% Above TriggerLevel100%Trigger Level70% BelowTrigger Level100%Measures Positive PulseMeasures Negative Pulse e

True-rms Digital Multimeters Making Measurements 45 To measure duty cycle, position the rotary switch on one of the functions allowing frequen

287/289 Users Manual 46 Trigger LevelPulseWidthPeriod =PeriodTrigger LevelPulse WidthMeasure Positive Pulse WidthMeasure Negative Pulse Width1Frequenc

True-rms Digital Multimeters Changing Meter Setup Options 47 The primary display indicates the input signals pulse width in milliseconds. The

287/289 Users Manual 48 Setting Date and Time The Meter’s internal clock is used in the display and for time-stamping recorded measurements. To change

True-rms Digital Multimeters Using Memory 49 Enabling and Disabling the Smoothing Mode When an AC input signal is noisy or changes rapidly, th

287/289 Users Manual iv Error Messages ...

287/289 Users Manual 50 saved under the name of Save-2. The auto-incrementing number can be reset to 1 by positioning the menu selector next to the sa

True-rms Digital Multimeters Using Memory 51 Note X-axis time labels are shown in elapsed time while the timestamp shown under the cursor is a

287/289 Users Manual 52 softkeys labeled Prev and Next to select an item for deletion. Next, press the softkey labeled Delete. A message asking to con

True-rms Digital Multimeters Recording Measurement Data 53 • Recording session duration expiring. • Manually stopping the recording session.

287/289 Users Manual 54 The Meter allocates memory in such a way as to guarantee capturing all of the user-specified sample intervals. Event records w

True-rms Digital Multimeters Using Communications 55 Table 9. Stopped Recording Display VACStart Time : Duration : 3 days 14 Hrs 47 mins

287/289 Users Manual 56 Error Messages Table 10 list some of the error messages the Meter may display and the conditions that may be causing the error

True-rms Digital Multimeters Maintenance 57 Maintenance XWWarning To avoid electrical shock or personal injury, repairs or servicing not cover

287/289 Users Manual 58 Menu Menu10.000k0.508:10pm06/13/078:10pm06/13/07Replace F1 if reading is OLReplace F2 if reading is OL est33.eps Figure 28. Te

True-rms Digital Multimeters Maintenance 59 Replacing the Batteries Refer to Figure 30 and replace the batteries as follows: 1. Turn the Mete

v List of Tables Table Title Page 1. Symbols...

287/289 Users Manual 60 F211 AF10.44 A est32.eps Figure 30. Replacing Batteries and Fuses

True-rms Digital Multimeters In Case of Difficulty 61 In Case of Difficulty If the Meter does not seem to work properly: 1. Check that all ba

287/289 Users Manual 62 Service and Parts Replacement parts and accessories are shown in Tables 11 and 12 and Figure 31. To order parts and accessorie

True-rms Digital Multimeters Service and Parts 63 Table 11. Replacement Parts (cont.) Item Description Qty. Fluke Part/Model Number 13 RSO

287/289 Users Manual 64 114232426251518192021221716342564 PL2 PL6 PL78101112139 est40.eps Figure 31. Replaceable Parts

True-rms Digital Multimeters Service and Parts 65 Table 12. Accessories Item Description AC72 Alligator Clips for use with TL75 test lead set

287/289 Users Manual 66 General Specifications Maximum voltage between any Terminal and Earth Ground: 1000 V W Fuse Protection for mA or μA inputs ...

True-rms Digital Multimeters Detailed Specifications 67 Electromagnetic Compatibility Standards (EMC) European EMC...

287/289 Users Manual 68 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

True-rms Digital Multimeters Detailed Specifications 69 AC Current Specifications Accuracy Function Range Resolution 20 to 45 Hz 45 to 1 kHz

287/289 Users Manual vi

287/289 Users Manual 70 DC Voltage Specification Accuracy AC over DC, DC over AC, AC + DC [2] Function Range Resolution DC[2] 20 to 45 Hz 45 Hz to 1

True-rms Digital Multimeters Detailed Specifications 71 DC Current Specifications Accuracy AC over DC, DC over AC, AC + DC [1] Function Range

287/289 Users Manual 72 Resistance Specifications Function Range Resolution Accuracy 50 Ω [1][3] 0.001 Ω 0.15 % + 20 500 Ω [1] 0.01 Ω 0.05 % + 10 5 kΩ

True-rms Digital Multimeters Detailed Specifications 73 Capacitance and Diode Test Specifications Function Range Resolution Accuracy 1 nF [1]

287/289 Users Manual 74 Frequency Counter Specifications Function Range Resolution Accuracy 99.999 Hz 0.001 Hz 0.02 % + 5 999.99 Hz 0.01 Hz 0.005

True-rms Digital Multimeters Detailed Specifications 75 Frequency Counter Sensitivity Approximate Voltage Sensitivity(rms sine wave) [1] Input

287/289 Users Manual 76 MIN MAX, Recording, and Peak Specifications Function Nominal Response Accuracy 200 ms to 80% (dc function) Specified accuracy

True-rms Digital Multimeters Detailed Specifications 77 Input Characteristics Function Overload Protection [1] Input Impedance Common Mode Re

287/289 Users Manual 78 Burden Voltage (A, mA, μA) Function Range Burden Voltage 500 μA 102 μV/ μA 5000 μA 102 μV/ μA 50.000 mA 1.8 mV/mA mA, μA 400.

vii List of Figures Figure Title Page 1. Push Buttons .......................