Agilent Technologies U1251B Manuale di Servizio

Agilent TechnologiesAgilent U1251B and U1252B Handheld Digital MultimeterUser’s and Service Guide

X Agilent U1251B/U1252B User’s and Service Guide

80 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingSetting Data Hold/Refresh Hold Mode1 Set OFF to enable the Data Hold mo

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 81Setting Data Logging Mode1 Set to “Hand” to enable the manual data logg

82 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingSetting Thermocouple Types (U1252B only)The thermocouple sensor types t

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 83Setting Reference Impedance for dBm MeasurementThe reference impedance

84 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingSetting Minimum Frequency MeasurementThe minimum frequency setup influe

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 85Setting Temperature UnitFour combination displays are available: • Cels

86 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingFigure 4-6 Temperature unit setupPress Press Press Press Press

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 87Setting Auto Power Saving Mode• The timer for APF (Auto Power OFF) can

88 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingFigure 4-7 Auto power saving setupPress Press Press Press Press

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 89Setting Percentage (%) Scale ReadoutThis setting converts the DC curren

Agilent U1251B/U1252B User’s and Service Guide XIII Contents1 Getting StartedIntroducing the U1251B/U1252B Handheld Digital Multimeter 2Check the ship

90 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingSetting Beep FrequencyThe driving frequency can be set to 2400, 1200, 6

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 91Setting Backlight Timer• The timer can be set to 1—99 seconds. The back

92 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingSetting Baud RateSelect the baud rate for remote control. The available

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 93Setting Parity CheckSelect the parity check for remote control. It can

94 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingSetting Data BitSelect the data bit for remote control. It can be set t

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 95Setting Echo Mode• Echo ON enables the return of characters to the PC i

96 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingSetting Print ModePrint ON enables the printing of measured data to the

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 97Returning to Default Factory Settings• Press for more than 1 second t

98 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingSetting the Battery VoltageBattery type for the multimeter can be set t

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 99Setting the FilterThis setting is used to filter AC signals in DC measu

XIV Agilent U1251B/U1252B User’s and Service Guide Measuring Capacitance 43Measuring Temperature 45Alerts and Warning During Measurement 49Overload al

100 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingTable 4-2 Filter defaultsParameter Firmware version Default settingFiL

101Agilent TechnologiesAgilent U1251B and U1252B Handheld Digital MultimeterUser’s and Service Guide5MaintenanceIntroduction 102General maintenance 10

102 Agilent U1251B/U1252B User’s and Service Guide5 MaintenanceIntroductionGeneral maintenanceBesides the above hazard, dirt, or moisture in the termi

Maintenance 5Agilent U1251B/U1252B User’s and Service Guide 1031 At the rear panel, turn the screw on the battery cover from the LOCK to the OPEN

104 Agilent U1251B/U1252B User’s and Service Guide5 MaintenanceFigure 5-1 9 V rectangular batteryStorage considerationsAfter the first charge, it is r

Maintenance 5Agilent U1251B/U1252B User’s and Service Guide 105Charging the batteryA new rechargeable battery comes in a discharged condition and

106 Agilent U1251B/U1252B User’s and Service Guide5 MaintenanceUse the specified 24 V DC adaptor to charge the battery. Remember never to turn the rot

Maintenance 5Agilent U1251B/U1252B User’s and Service Guide 107Figure 5-2 Battery capacity display as trickle5 After pressing SHIFT or when the s

108 Agilent U1251B/U1252B User’s and Service Guide5 MaintenanceFigure 5-3 Self-testTable 5-2 Error messages Error Error messageOL1 No battery inside2

Maintenance 5Agilent U1251B/U1252B User’s and Service Guide 1096 The smart charging mode will start if the meter passes the self- test. The charg

Agilent U1251B/U1252B User’s and Service Guide XV Setting Minimum Frequency Measurement 84Setting Temperature Unit 85Setting Auto Power Saving Mode 87

110 Agilent U1251B/U1252B User’s and Service Guide5 MaintenanceFigure 5-4 Charging mode7 The charge end message (C–End) appears on the secondary displ

Maintenance 5Agilent U1251B/U1252B User’s and Service Guide 111Figure 5-6 Battery charging procedurePress to start chargeError-FullError-EmptyBat

112 Agilent U1251B/U1252B User’s and Service Guide5 MaintenanceFuse checking procedureIt is recommended that you check the fuses of the multimeter bef

Maintenance 5Agilent U1251B/U1252B User’s and Service Guide 1133 To test Fuse 1, place the tip of the test probe on the right half of input termi

114 Agilent U1251B/U1252B User’s and Service Guide5 MaintenanceReplacing the fuseFollow the procedures below to replace the fuse.1 Turn the meter off

Maintenance 5Agilent U1251B/U1252B User’s and Service Guide 115Figure 5-8 Fuse replacementTable 5-4 Fuse specificationsFuse Agilent part number R

116 Agilent U1251B/U1252B User’s and Service Guide5 MaintenanceTroubleshootingIf the instrument fails to operate, check the battery and the test leads

Maintenance 5Agilent U1251B/U1252B User’s and Service Guide 117Replaceable PartsThis section contains information for ordering replacement parts

118 Agilent U1251B/U1252B User’s and Service Guide5 Maintenance

119Agilent TechnologiesAgilent U1251B and U1252B Handheld Digital MultimeterUser’s and Service Guide6Performance Tests and CalibrationCalibration Over

XVI Agilent U1251B/U1252B User’s and Service Guide 6 Performance Tests and CalibrationCalibration Overview 120Closed-case electronic calibration 120Ag

120 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationCalibration OverviewThis manual contains procedures to verify the

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 121Calibration intervalA 1- year interval is adequate for most appli

122 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationRecommended Test EquipmentThe test equipment recommended for the

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 123Basic Operating TestThe Basic Operating Test is to test the basic

124 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationCurrent terminal testThis test determines if the input warning of

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 125Charge terminal alert test This test determines if the charge ter

126 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationTest ConsiderationsLong test leads can also act as antennas which

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 127Calibration SecurityThe calibration security code prevents accide

128 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationPerformance Verification TestsUse the Performance Verification Te

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 129Perform the verification test steps in the following Table 6- 2:T

Agilent U1251B/U1252B User’s and Service Guide XVII Specification Assumptions 158Electrical Specifications 158DC Specifications 158AC Specifications 1

130 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationStep Test Func tion Range 5520A Output Error from nominal 1 ye

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 131Step Test Function Range 5520A Output Error from nominal 1 year

132 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationStep Test Function Range 5520A Output Error from nominal 1 year

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 133Step Test Function Range 5520A Output Error from nominal 1 year

134 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationNotes for verification test:1 The additional error to be added as

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 13510 10 A continuous, and additional 0.5% to specified accuracy whe

136 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationUnsecuring the instrument for calibrationBefore you can adjust th

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 137To change the instrument calibration security code from the front

138 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationTo unsecure the instrument without the security codeTo unsecure t

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 139Calibration Process To complete a full instrument calibration use

XVIII Agilent U1251B/U1252B User’s and Service Guide

140 Agilent U1251B/U1252B User’s and Service Guide6 Performance Tests and CalibrationUsing the front panel for adjustmentsThis section describes the p

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 141Adjustments ConsiderationYou will need a test input cable, a conn

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 142Valid adjustment input values Adjustment can be accomplished usin

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 143Adjustment ProcedureReview the sections “Test Considerations” on

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 144For an adjustment that is successful, the secondary display will

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 145NOTEFor serial numbers below MY51530001, the 10 kHz input frequen

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 146Step Test Function Cal Range Input Cal ItemU1251B U1252B3Press

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 147Step Test Func tion Cal Range Input Cal ItemU1251B U1252B5 Press

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 148Step Test Function Cal Range Input Cal ItemU1251B U1252B7 Turn th

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 149Step Test Function Cal Range Input Cal ItemU1251B U1252B11 Press

Agilent U1251B/U1252B User’s and Service Guide IX List of FiguresFigure 1-1 Tilt-stand at 60° 4Figure 1-2 Tilt-stand at 30° 4Figure 1-3 Tilt-stand at

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 150Finishing the Adjustment1 Remove all the shorting plugs and conne

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 1511 Press Adjustment Mode. The primary display shows the calibrat

Performance Tests and Calibration 6Agilent U1251B/U1252B User’s and Service Guide 152

153Agilent U1251B and U1252B Handheld Digital MultimeterUser’s and Service GuideAgilent Technologies7SpecificationsProduct Characteristics 154Measurem

154 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsProduct CharacteristicsPOWER SUPPLYBattery type: • 9 V size Ni-MH rechargeable batte

Specifications 7Agilent U1251B/U1252B User’s and Service Guide 155SAFETY COMPLIANCE• EN/IEC 61010-1:2001• ANSI/UL 61010-1:2004• CAN/CSA-C22.2 No. 6101

156 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsWARRANTYPlease refer to http://www.agilent.com/go/warranty_terms• Three years for th

Specifications 7Agilent U1251B/U1252B User’s and Service Guide 157Measurement CategoryThe Agilent U1251B and U1252B Handheld Digital Multimeter has a

158 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsSpecification Assumptions• The DC specifications are defined for measurements which

Specifications 7Agilent U1251B/U1252B User’s and Service Guide 159Function Range ResolutionTest Current/ Burden VoltageAccuracyU1251B U1252BResistance

X Agilent U1251B/U1252B User’s and Service Guide Figure 3-8 Full Log 64Figure 3-9 Interval (Automatic) logging mode operation 66Figure 3-10 Log review

160 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsFunction Range ResolutionTest Current/ Burden VoltageAccuracyU1251B U1252BCurrent500

Specifications 7Agilent U1251B/U1252B User’s and Service Guide 161AC SpecificationsAC specifications for U1251BTable 7-2 U1251B accuracy specification

162 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsAC specifications for U1252B Table 7-4 U1252B accuracy specifications ± (% of readin

Specifications 7Agilent U1251B/U1252B User’s and Service Guide 163AC+DC Specifications for U1252BTable 7-6 U1252B true RMS ac+dc voltage specification

164 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsCapacitance SpecificationsTemperature SpecificationsTable 7-8 Capacitance specificat

Specifications 7Agilent U1251B/U1252B User’s and Service Guide 165Frequency SpecificationsDuty Cycle and Pulse Width SpecificationsNotes for temperatu

166 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsFrequency Sensitivity SpecificationsFor voltage measurementsNotes for duty cycle spe

Specifications 7Agilent U1251B/U1252B User’s and Service Guide 167For current measurements500.00 V 25 V - 30 V < 100 kHz- 50 V - 60 V -1000.0 V 50

168 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsPeak Hold SpecificationsFrequency Counter Specifications for U1252BTable 7-14 Peak h

Specifications 7Agilent U1251B/U1252B User’s and Service Guide 169Square Wave Output for U1252BTable 7-16 Frequency counter (divide by 100 [4]) specif

Agilent U1251B/U1252B User’s and Service Guide XI List of TablesTa b l e 1 - 1 Rotary switch description and functions 8Ta b l e 1 - 2 Keypad descript

170 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsNotes for square wave output specifications:1 Output impedance: 3.5 kW maximum.2 The

Specifications 7Agilent U1251B/U1252B User’s and Service Guide 171Operating SpecificationsDisplay update rate (approximate)Table 7-18 Display update r

172 Agilent U1251B/U1252B User’s and Service Guide7 SpecificationsInput impedanceTable 7-19 Input ImpedanceFunction Range Input ImpedanceDC Voltage [1

© Agilent Technologies, Inc. 2009–2013Printed in MalaysiaTenth Edition, August 12, 2013U1251-90036www.agilent.comAgilent TechnologiesContact usTo obta

II Agilent U1251B/U1252B User’s and Service GuideNotices© Agilent Technologies, Inc. 2009–2013No part of this manual may be reproduced in any form or

XII Agilent U1251B/U1252B User’s and Service Guide Ta b l e 7 - 5 U1252B accuracy specifications ± (% of reading + num-ber of LSD) for true RMS AC cur

1Agilent U1251B and U1252B Handheld Digital MultimeterUser’s and Service GuideAgilent Technologies1Getting StartedIntroducing the U1251B/U1252B Handhe

2 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started TutorialIntroducing the U1251B/U1252B Handheld Digital MultimeterKey features of thi

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 3Check the shipmentVerify that you have received the following items with yo

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 4Adjusting the tilt-standTo adjust the meter to a 60° standing position, pu

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 5To adjust the meter to a hanging position follow the steps shown in Figure

6 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started TutorialThe front panel at a glance Figure 1-4 U1252B front panelDisplayKeypadRotary

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 7The rear panel at a glanceFigure 1-5 Rear panelIR Communication PortTest pr

8 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started TutorialThe rotary switch at a glanceFigure 1-6 Rotary switchTable 1-1 Rotary switch

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 9The keypad at a glanceThe operation of each key is shown below. Pressing a

Agilent U1251B/U1252B User’s and Service Guide IIISafety SymbolsThe following symbols on the instrument and in the documentation indicate precautions

10 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started Tutorial5 scrolls through available measuring ranges (except when rotary switch is

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 11The display at a glanceTo view the full display (with all segments illumin

12 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started TutorialTable 1-3 General display symbolsLCD symbol DescriptionRemote control Therm

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 13The primary display signs are explained below. Table 1-4 Primary display s

14 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started TutorialThe secondary display signs are explained below.The analog bar emulates the

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 15The “+” or “–” sign is indicated when the positive or negative value has b

16 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started Tutorialdisplay and frequency on the primary display. Alternatively, pulse width (m

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 17Selecting display with the Dual buttonPress to select different combinat

18 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started TutorialTable 1-8 Selecting display with the Dual buttonRotary switch position (Fun

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 19(AC + DC voltage)[for U1252B]AC + DC mV Hz (AC coupling)dBm or dBV AC + D

IV Agilent U1251B/U1252B User’s and Service GuideSafety InformationThis meter is safety-certified in compliance with EN/IEC 61010-1:2001, UL 61010-1 S

20 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started TutorialSelecting display with the Shift buttonThe table below shows selection of p

Getting Started Tutorial 1Agilent U1251B/U1252B User’s and Service Guide 21 for U1252B(AC + DC Voltage)DC mVAC mVAC + DC mV Ω(Resistance)Ω ΩnS(Diode

22 Agilent U1251B/U1252B User’s and Service Guide1 Getting Started TutorialThe terminals at a glanceFigure 1-9 Connector terminalsWARNINGTo avoid dama

23Agilent U1251B and U1252B Handheld Digital MultimeterUser’s and Service GuideAgilent Technologies2 Making MeasurementsUnderstanding The Measurement

24 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsUnderstanding The Measurement InstructionsWhen making measurements, follow the

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 25Measuring AC voltageSet up the multimeter to measure AC voltage as shown in

26 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsMeasuring DC voltageSet up the multimeter to measure DC voltage as shown in Fi

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 27

28 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsMeasuring AC and DC Signals (U1252B only)For better accuracy when measuring th

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 29Measuring CurrentµA & mA measurementSet up the multimeter to measure µA

Agilent U1251B/U1252B User’s and Service Guide VWARNING• When working above 70 VDC, 33 VAC RMS or 46.7 V peak, exercise caution – such range pose a sh

30 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsFigure 2-3 Measuring μA and mA currentRed LeadBlack Lead

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 31Percentage scale of 4 mA to 20 mASet up the multimeter to measure percentage

32 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsFigure 2-4 Measuring scale of 4-20 mARed LeadBlack Lead

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 33A (ampere) measurementSet up the multimeter to measure A (ampere) as shown i

34 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsFrequency CounterSet up the multimeter to measure frequency as shown in Figure

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 35Figure 2-6 Measuring fre-quencyAudible continuityPressPressPress

36 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsMeasuring Resistance, Conductance and Testing ContinuitySet up the multimeter

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 37Press to scroll through audible continuity, conductance and resistance tes

38 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsAudible continuityIn the range of 0–500 Ω, the beeper will sound if the resist

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 39Figure 2-9 Conductance measurementRed LeadBlack Lead

VI Agilent U1251B/U1252B User’s and Service GuideRegulatory MarkingsThe CE mark is a registered trademarkof the European Community. This CEmark shows

40 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsTestin g DiodesTo test a diode, turn the power off to the circuit and remove t

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 41Figure 2-10 Measuring forward bias of diodeRed LeadBlack Lead

42 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsFigure 2-11 Measuring reverse bias of diode Red LeadBlack LeadRed LeadBlack Le

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 43Measuring CapacitanceThe meter measures capacitance by charging the capacito

44 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsFigure 2-12 Capacitance measurements

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 45Measuring TemperatureThe bead type thermocouple probe is suitable for making

46 Agilent U1251B/U1252B User’s and Service Guide2 Making Measurements8 For a quick measurement, use the 0 °C compensation adapter to see the temper

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 47If you are working in a constantly varying environment, where ambient temper

48 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsFigure 2-15 Surface temperature measurement

Making Measurements 2Agilent U1251B/U1252B User’s and Service Guide 49Alerts and Warning During Measurement Overload alertThe meter provides an ov

Agilent U1251B/U1252B User’s and Service Guide VIIWaste Electrical and Electronic Equipment (WEEE) Directive 2002/96/ECThis instrument complies with t

50 Agilent U1251B/U1252B User’s and Service Guide2 Making MeasurementsCharge terminal alertThe meter sounds an alert beep when the terminal detect

51Agilent TechnologiesAgilent U1251B and U1252B Handheld Digital Multimeter User’s and Service Guide3Functions and FeaturesDynamic Recording 52Data Ho

52 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsDynamic RecordingThe Dynamic Recording mode can be used to detectintermittent

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 53Figure 3-1 Dynamic recording mode operation Press Max Min for > 1

54 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsData Hold (Trigger Hold)The data hold function allows the user to freeze the

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 55Refresh HoldThe Refresh Hold function allows you to hold the displaye

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 56Figure 3-3 Refresh hold mode operationThe HOLD sign flashes until the

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 57Null (Relative)The Null function subtracts a stored value from the pr

58 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsFigure 3-4 Null (relative) mode operationPress Press as NULL is flashing on

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 59Decibel DisplayThe dBm operation calculates the power delivered to a

VIII Agilent U1251B/U1252B User’s and Service GuideIn This Guide…1Getting StartedThis chapter contains information on the Agilent U1251B and U1252B ha

60 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsFigure 3-5 dBm/dBV display mode operationPress PressPress Press Press for &

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 611 ms Peak HoldThe Peak Hold function allows the measurement of peak v

62 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsFigure 3-6 1 ms peak hold mode operationPress for > 1 sec.Press Press St

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 63Data LoggingThe data logging function provides the convenience of rec

64 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsFigure 3-7 Hand (Manual) logging mode operationFigure 3-8 Full LogPress for

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 65Interval loggingFirstly, ensure that interval (time) logging is speci

66 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsFigure 3-9 Interval (Automatic) logging mode operationPress for > 1 sec.P

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 67Reviewing logged data1 Press for more than 1 second to enter the Lo

68 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsFigure 3-10 Log review mode operationPress View for > 1 sec.Press ViewPres

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 69Square Wave Output (for U1252B)The square wave output function can be

Agilent U1251B/U1252B User’s and Service Guide IXDeclaration of Conformity (DoC)The Declaration of Conformity (DoC) for this instrument is available o

70 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsFigure 3-11 Frequency adjustment for square wave output5 Press to select the

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 71Figure 3-12 Duty cycle adjustment for square wave outputPress Press P

72 Agilent U1251B/U1252B User’s and Service Guide3 Features and FunctionsFigure 3-13 Pulse width adjustment for square wave outputPress Press Press Pr

Features and Functions 3Agilent U1251B/U1252B User’s and Service Guide 73Remote CommunicationThe meter has a bi- directional (full duplex) com

74 Agilent U1251B/U1252B User’s and Service Guide3 Features and Functions

75Agilent TechnologiesAgilent U1251B and U1252B Handheld Digital MultimeterUser’s and Service Guide4Changing The Default SettingSelecting Setup Mode 7

76 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingSelecting Setup ModeTo enter the Setup mode, perform the following step

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 77Table 4-1 Available setting options in Setup modeMenu item Available se

78 Agilent U1251B/U1252B User’s and Service Guide4 Changing The Default SettingMenu item Available setting optionsDefault factory settingDisplay Descr

Changing The Default Setting 4Agilent U1251B/U1252B User’s and Service Guide 79Menu item Available setting optionsDefault factory settingDisplay Descr