Keysight U1241B User'S And Service Manual Download

Page: 11 / 83

Keysight U1241B and U1242B User’s and Service Guide

In This Guide…

1 Getting

Started

Chapter 1 introduces key features and steps to get started with

a U1241B or U1242B handheld digital multimeter. This chapter also guides you

through the basics of the front panel operations.

2 Features

and

Functions

Chapter 2 contains the information on how to set up

connections to perform multimeter measurements. It also describes the features

and functions that are available in the U1241B and U1242B handheld digital

multimeters in step-by-step instructions.

3 Default

Setting

Configurations

Chapter 3 describes on how to change and

configure the default setting of the U1241B and U1242B handheld digital

multimeters including data logging and other setting features

4 Service and Maintenance

Chapter 4 provides the information on the warranty,

services, maintenance procedures and troubleshooting hints to solve general

problems that you may encounter with the multimeter.

5 Performance Tests and Calibration

Chapter 5 contains the procedures of the

performance verification tests and calibration adjustments.

6 Characteristics and Specifications

Chapter 6 lists the specifications and

characteristics of the U1241B and U1242B handheld digital multimeters.

Summary of Contents for U1241B

Page 1: ...Keysight U1241B and U1242B Handheld Digital Multimeters User s and Service Guide ...

Page 2: ...these rights customarily provided to the public to use modify reproduce release perform display or disclose commercial computer software or commercial computer software documentation No additional government requirements beyond those set forth in the EULA shall apply except to the extent that those terms rights or licenses are explicitly required from all providers of commercial computer software ...

Page 3: ...trument Direct current DC Caution risk of electric shock Alternating current AC Caution risk of danger refer to this manual for specific Warning or Caution information Both direct and alternating current CAT III 1000 V Category III 1000 V Overvoltage Protection Earth ground terminal CAT IV 600 V Category IV 600 V Overvoltage Protection Equipment protected throughout by double insulation or reinfor...

Page 4: ...he rated voltage as marked on the multimeter between terminals or between terminal and earth ground Double check the multimeter s operation by measuring a known voltage For current measurement turn off circuit power before connecting the multimeter to the circuit Always place the multimeter in series with the circuit When connecting probes always connect the common test probe first When disconnect...

Page 5: ...ice and repair to ensure the safety features are maintained Do not operate damaged equipment as the safety protection features built into this product may have been impaired either through physical damage excessive moisture or any other reason Remove power and do not use the product until safe operation can be verified by service trained personnel If necessary return the product to Keysight Techno...

Page 6: ...ilar equipment Measurement CAT III Measurements performed in the building installation Examples are measurements on distribution boards circuit breakers wiring including cables bus bars junction boxes switches socket outlets in the fixed installation and equipment for industrial use and some other equipment including stationary motors with permanent connection to the fixed installation Measurement...

Page 7: ...r compatible test probes Environment Conditions Requirements Operating environment Full accuracy at 10 C to 55 C Operating relative humidity Full accuracy up to 80 RH for temperature up to 30 C decreasing linearly to 50 RH at 55 C Storage environment 20 C to 70 C Altitude 0 to 2000 meters per IEC 61010 1 3rd Edition CAT III 1000 V CAT IV 600 V Pollution Degree Pollution Degree II ...

Page 8: ... EN 61000 4 2 2009 IEC 61000 4 3 2006 A1 2007 A2 2010 EN 61000 4 3 2006 A1 2008 A2 2010 IEC 61000 4 8 2009 EN 61000 4 8 2010 Canada ICES NMB 001 Issue 4 June 2006 Australia New Zealand AS NZS CISPR 11 2011 Safety Compliance IEC 61010 1 2010 EN 61010 1 2010 IEC 61010 2 033 2012 EN 61010 2 033 2012 Canada CAN CSA C22 2 No 61010 1 12 CAN CSA C22 2 No 61010 2 030 12 Reference Standard CAN CSA C22 2 No...

Page 9: ...cy of Australia This signifies compliance with the Australia EMC Framework regulations under the terms of the Radio Communication Act of 1992 This instrument complies with the WEEE Directive 2002 96 EC marking requirement This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste This symbol indicates the time period during whic...

Page 10: ...ed as a Monitoring and Control Instrument product The affixed product label is as shown below Do not dispose in domestic household waste To return this unwanted instrument contact your nearest Keysight Service Center or visit http about keysight com en companyinfo environment takeback shtml for more information Sales and Technical Support To contact Keysight for sales and technical support refer t...

Page 11: ...n step by step instructions 3 Default Setting Configurations Chapter 3 describes on how to change and configure the default setting of the U1241B and U1242B handheld digital multimeters including data logging and other setting features 4 Service and Maintenance Chapter 4 provides the information on the warranty services maintenance procedures and troubleshooting hints to solve general problems tha...

Page 12: ...12 Keysight U1241B and U1242B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 13: ... Electronic Equipment WEEE Directive 2002 96 EC 10 Product category 10 Sales and Technical Support 10 In This Guide 11 1 Getting Started Introduction 22 Checking the Shipping Contents 23 The Front Panel at a Glance 24 Adjusting Tilt Stand 24 The Annunciator at a Glance 25 Analog Bar Graph 26 The Keypad and Rotary Switch at a Glance 26 The Input Terminal at a Glance 28 2 Features and Functions Meas...

Page 14: ...Refresh Hold 39 Null Relative 40 Data Logging U1242B 40 Manual Logging 41 Interval Logging 42 Reviewing Logged Data 43 Removing Logged Data 43 Scanning Temperature Measurement U1242B 44 Checking Battery Capacity 44 Alerts and Warning During Measurement 45 Overload Alert 45 Input A Warning Alert 45 Input mA Warning Alert 45 3 Default Setting Configurations Setting Configurations 48 4 Service and Ma...

Page 15: ...ting the Display 63 Input A Terminal Test 64 Input mA Terminal Alert Test 64 Calibration Process 64 Test Considerations 65 Input Connections 66 Performance Verification Tests 66 Calibration Security 70 Unsecuring the Multimeter for Calibration 70 Using the Front Panel for Adjustments 72 Adjustment Considerations 73 Valid Adjustment Input Values 74 Calibration Adjustments 75 Exiting Adjustment Mode...

Page 16: ...16 Keysight U1241B and U1242B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 17: ... handheld digital multimeter 25 Figure 1 4 Keypad and rotary switch of a U1242B handheld digital multimeter 26 Figure 1 5 Input terminal of a U1242B handheld digital multimeter 28 Figure 2 1 Manual logging display 42 Figure 2 2 Interval logging display 43 Figure 2 3 Battery capacity display 44 Figure 4 1 Battery replacement 53 Figure 4 2 Fuse 1 replacement 54 Figure 4 3 Fuse 2 replacement 55 Figur...

Page 18: ...18 Keysight U1241B and U1242B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 19: ...keypad 27 Table 1 6 Terminal connections for different measuring functions 28 Table 2 1 Annunciator display for each switch condition 37 Table 2 2 Functions available for data logging 41 Table 3 1 Available setting options in Setup mode 49 Table 4 1 Basic troubleshooting hints 56 Table 4 2 List of replacement part numbers 56 Table 5 1 Recommended test equipment 62 Table 5 2 Verification Tests 67 T...

Page 20: ...20 Keysight U1241B and U1242B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 21: ...he Front Panel at a Glance 24 Adjusting Tilt Stand 24 The Annunciator at a Glance 25 The Keypad and Rotary Switch at a Glance 26 The Input Terminal at a Glance 28 This chapter introduces key features and steps to get started with a U1241B or U1242B handheld digital multimeter This chapter also guides you through the basics of the front panel operations ...

Page 22: ...y tests Capacitance measurement up to 10mF The scale readout for 4 20 mA or 0 20 mA measurement Temperature test with selectable 0 C compensation without ambient temperature compensation K type for U1241B and J K types temperature measurement for U1242B MinMax Recording for minimum maximum and average readings Data Hold with manual or auto trigger Null Relative function Auto or manual data logging...

Page 23: ...242B handheld digital multimeter Four 1 5 V AAA alkaline batteries Silicone test leads 4 mm probes Quick Start Guide Certificate of Calibration Optional U1162A Alligator clips U1163A SMT Grabbers U1164A Fine tip test probe U1181A Immersion probe type K U1182A Industrial surface probe U1183A Air probe U1184A Temperature probe adapter U1185A Thermocouple J type probe and adapter U1186A Thermocouple ...

Page 24: ...Figure 1 1 Front panel of a U1241B and U1242B handheld digital multimeters Adjusting Tilt Stand Figure 1 2 Tilt stand positions Annunciator Keypad Rotary Switch Input Terminal Pull the tilt stand outwards to its maximum reach approximately 60 Bend the tip of the stand Tilt stand at 30 Tilt stand at 60 ...

Page 25: ...13 Harmonic Ratio mode for U1242B 3 Cold junction of ambient temperature disabled 14 Data logging mode for U1242B 4 Audible continuity for resistance and diode function 15 Data logging View mode for U1242B 5 Primary display 16 Auto or manual for data logging mode and datalog viewing mode 6 AC or DC measurement mode 17 Secondary display temperature display 7 Auto range 18 Null math function 8 Diode...

Page 26: ...r current value When 4 20 mA scale or 0 20 mA scale is indicated on the primary display the bar graph represents the current value Each segment represents 500 or 50 counts depending on the range indicated on the peak bar graph The Keypad and Rotary Switch at a Glance Figure 1 4 Keypad and rotary switch of a U1242B handheld digital multimeter Table 1 3 Bar graph counts Range Counts Segment Function...

Page 27: ...t 5 mA to 440 mA mA scale DCA 0 001 A to 10 A ACA measurement 0 5 A to 10 A T1 T1 temperature 40 C to 1000 C T2 and T1 T2 temperature measurements for U1242B 40 C to 1000 C Table 1 5 Features that can be accessed through front panel keypad Actions Steps Turns ON backlight Press Checks battery capacity Press and hold for 1 second Freezes the measured value Press Starts MIN MAX AVG recording Press a...

Page 28: ... input limit Table 1 6 Terminal connections for different measuring functions Measurement Functions Input terminal Overload Protection Voltage COM 1000 V R M S Diode 1000 V R M S Resistance 0 3 A short circuit current Capacitance μA mA μA mA COM 440 mA 1000 V 30 kA fast acting fuse A A COM 11 A 1000 V 30 kA fast acting fuse Temperature T1 T1 1000 V R M S Temperature for U1242B only T2 T2 440 mA 10...

Page 29: ...ring Temperature 34 Measuring Harmonic Ratio U1242B 36 Using Switch Counter 36 MinMax Recording 38 Data Hold Trigger Hold 39 Refresh Hold 39 Null Relative 40 Data Logging U1242B 40 Scanning Temperature Measurement U1242B 44 Checking Battery Capacity 44 Alerts and Warning During Measurement 45 This chapter contains the detailed information on how to configure connections to perform the multimeter m...

Page 30: ...e Measuring Current 440 mA WARNING Ensure that terminal connections are correct for that particular measurement before any measurement To avoid damaging the device do not exceed the input limit Press to select AC voltage measurement mode U1241B or U1242B Press to select AC current measurement mode Measuring DC current Measuring AC current ...

Page 31: ... lower than 440 mA use the mA or μA current measurement mode Press to select AC current measurement mode The scale of 0 20 mA or 4 20 mA is selectable in setup mode The mA scale for 4 20 or 0 20 is indicated on primary display and the bar graph indicates the current value The 25 scale readout represents DC 8 mA at 4 20mA and DC 5 mA at 0 20mA Press at position ...

Page 32: ...test Press at U1241B or U1242B position The frequency measurement is applicable for DC and AC current measurements The bar graph is used to indicate the value of AC voltage Alternatively press button to display the value of AC voltage The multimeter will return to frequency value display automatically after three seconds Press at position to enable the continuity test function Measurement range Be...

Page 33: ...to 100 MΩ CAUTION Disconnect circuit power and discharge all high voltage capacitors before testing diodes to prevent possible damage to the multimeter Reverse bias Forward bias NOTE The multimeter can display diode forward bias of up to approximately 1 1 V Typical diode forward bias is between the range of 0 3 to 0 8 V range with audible beeper sound ...

Page 34: ...an 10 000 μF discharge the capacitor and manually select a suitable measurement range This will speed up measuring time in order to obtain the correct capacitance value Ensure the correct polarity when measuring polarized capacitors For measuring small capacitances press with the test leads open to subtract the residual capacitance of the multimeter and leads CAUTION Do not bend the thermocouple l...

Page 35: ...ing as the relative reference temperature 4 Touch the measurement surface with the thermocouple probe 5 Read the display for the relative temperature Press at T1T2 U1242B position to enable T2 function Measuring tips Clean the measurement surface and remember to disable the applied power When measuring temperature move the thermocouple along the surface until you get the highest lowest temperature...

Page 36: ...display the RMS value of AC voltage The multimeter will resume back to harmonic ratio value display automatically after 3 seconds Press at position The switch counter is used to check the open close condition of a switch relay or push button The multimeter provides the time base of 10 and 100 seconds or user defined time base This function detects switch condition in normally close Low level or no...

Page 37: ...0 seconds or Hand user defined The second display shows 10 100 or HAn respectively 5 The first intermittent will cause the multimeter to beep and starts to down count the time base Each intermittent will increase the counter once 6 The counter value and time base are indicated on primary display and secondary display respectively Press to start next counting 7 Press to exit switch counter function...

Page 38: ...s since the MinMax function was enabled MAXMINAVG present reading actual input signal value Refer to the following steps to use the MinMax Recording mode 1 Press for more than one second to enter the MinMax Recording mode The multimeter is now in the continuous mode or non data hold non trigger mode 2 The beeper sounds when a new maximum or minimum value is recorded 3 Press to scroll through the m...

Page 39: ...esh Hold mode The present value will be held and the annunciator is displayed 2 The multimeter is ready to hold new measuring value once the variation of measuring value exceeds the setting of variation count and the annunciator is flashed 3 The hold value will be updated until the measuring value is stable The annunciator will stop flashing and stays lit an audible tone will sound to remind user ...

Page 40: ... exit this mode press while NULL is flashing on the display Data Logging U1242B The data logging function stores the data in non volatile memory Thereby the data remains saved when the multimeter is turned off Data logging records only the value on primary display Two options of data logging are offered Hand manual logging and Interval automatic logging functions NOTE In resistance measurement the...

Page 41: ...n on primary display to memory 2 Press Log again for the next value that you want to save into memory see Figure 2 1 Table 2 2 Functions available for data logging Function Mode Range Voltage DC AC 1000 mV to 1000 V Current DC AC of mA 1000 μA to 10 A Hz AC Auto Harmonic Ratio AC Auto Ω Continuity 1000 Ω to 100 MΩ Diode 1 1 V Switch Counter 10 100 HAn Capacitance 1000 nF to 10 mF Temperature T1 T2...

Page 42: ...e 1 Press Log for more than one second to store the present value and function on primary display to memory 2 The reading automatically logs into the memory in every interval as preset in Setup mode see Figure 2 2 3 Press Log for more than one second to exit this mode NOTE Maximum data that can be stored is 100 entries When the 100 entries are filled FUL annunciator is indicated on the secondary d...

Page 43: ...logged data Press to select the first record and press to select the last record for quick navigation 3 Press to switch between hand manual and interval automatic logging review mode 4 Press View for more than one second to exit Log View mode Removing Logged Data Press Log for more than one second at the respective Log Review mode hand or interval to clear all logged data in the memory NOTE Maximu...

Page 44: ...can mode by pressing Scan for more than one second Checking Battery Capacity The battery sign will flash when the battery voltage drops below 4 4 V Once the low battery sign is displayed it is highly recommended to replace the batteries immediately See Battery Replacement in chapter 4 To check the battery capacity see the following steps 1 Press Bat for more than one second to view the battery cap...

Page 45: ...rted to the A input terminal but the rotary switch is not set to the corresponding A location The display indicates a flashing AErr annunciator until the test lead is removed from the A input terminal This warning alert is not available in T1 T2 temperature measurements mode Input mA Warning Alert The multimeter sounds an alerting beep when the μA mA input terminal detects a voltage level of more ...

Page 46: ...2 Features and Functions 46 Keysight U1241B and U1242B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 47: ...er s and Service Guide 47 3 Default Setting Configurations Setting Configurations 48 This chapter describes on how to change and configure the default setting of U1241B and U1242B handheld digital multimeters including data logging and other setting features ...

Page 48: ...e a menu item setting in Setup mode perform the following steps 1 Press or to scroll through menu items 2 Press or to scroll through available settings See Table 3 1 for the details of each available option 3 Press Save to save the changes These parameters remain in the non volatile memory 4 Press and hold Setup for more than one second to exit Setup mode NOTE After you hear a beep the multimeter ...

Page 49: ... the multimeter 3746 Hz OFF Disables beep sound of multimeter Thermocouple tYPE Sets thermocouple type to K type tYPE K tYPE a Sets thermocouple type to J type for U1242B tYPE mV Sets 100 mV measurement for T1 input Log Data logging for U1242B Hand Enables manual data logging Hand 1 9999 Sets interval for automatic data logging from 1 to 9999 seconds Press to toggle through the digit to be adjuste...

Page 50: ...e measurement unit to C d C Sets temperature measurement to C a To activate the multimeter after it has auto power off press any button to resume back to respective functional mode b The firmware is factory installed and is not field upgradeable c To view Temperature menu press for more than one second d After this setting has been changed resetting the multimeter will not revert it to the origina...

Page 51: ...nt 52 Fuse Replacement 54 Troubleshooting 55 Returning Instrument for Service 57 This chapter provides you with warranty services maintenance procedures and troubleshooting hints to solve general problems that you may encounter with the instrument Repair or service which are not covered in this manual should only be performed by qualified personnel ...

Page 52: ... 1 5 V x 4 batteries which must be the specified battery type To ensure that the multimeter performs as specified it is recommended that you replace the battery as soon as the low battery indicator is flashing See the following procedures for battery replacement 1 At the rear panel lift up the stand 2 Loosen the screw on the battery cover WARNING To avoid electrical shock or damage to the multimet...

Page 53: ... remove the battery cover 4 Replace the specified batteries ensure the correct polarity of batteries 5 Reverse the procedures of opening the cover to close the battery cover Figure 4 1 Battery replacement Battery Types ANSI NEDA IEC Alkaline 24A LR03 Zinc Chloride 24D R03 battery cover screw ...

Page 54: ...same size and rating into the center of the fuse holder Figure 4 2 Fuse 1 replacement 5 If you want to replace a defective Fuse 2 remove Fuse 1 then loosen the four screws shown in Figure 4 3 to lift and remove the circuit board from top case 6 Gently remove the defective Fuse 2 by prying one end of the fuse loose and removing it out of the fuse bracket see Figure 4 3 NOTE Users are recommended to...

Page 55: ...s original position and then re fasten the circuit board and the bottom cover respectively Troubleshooting If the instrument fails to operate check the batteries and test leads replace them if necessary If the instrument still does not function check the identification procedures as described in Table 4 1 Fuse 2 11 mA 1000 V WARNING To avoid electrical shock do not perform any service unless you a...

Page 56: ...es if necessary Ensure that the replaced batteries are new batteries it is recommended not to mix old batteries with new batteries No beeper tone Check setup mode and verify if the beeper is set to OFF Then select the desired driving frequency Failed on current measurement Check the fuse Table 4 2 List of replacement part numbers Part number Description 2110 1400 Fast blow fuse 1000 V 0 44 A 10 mm...

Page 57: ...ssories from the instrument Do not include accessories unless they are associated with the failure symptoms 3 Protect the instrument by wrapping it in plastic or heavy paper 4 Pack the instrument in foam or other shock absorbing material and place it in a strong shipping container You are recommended to use the original shipping material or order materials from a Keysight Technologies Sales Office...

Page 58: ...4 Service and Maintenance 58 Keysight U1241B and U1242B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 59: ...siderations 65 Performance Verification Tests 66 Calibration Security 70 Adjustment Considerations 73 Calibration Adjustments 75 Calibration Count 80 Calibration Errors 80 This chapter contains procedures of performance verification tests and calibration adjustments The performance tests is meant to verify the U1241B or U1242B handheld digital multimeter to ensure the multimeter is operating withi...

Page 60: ...in non volatile memory until the next calibration adjustment is performed Non volatile EEPROM calibration memory does not change when power has been off Calibration Interval A 1 year interval is adequate for most applications Accuracy specifications are warranted only if adjustment is made at regular calibration intervals Accuracy specifications are not warranted beyond the 1 year calibration inte...

Page 61: ...formed during the calibration process for best performance This will assure that the U1241B U1242B will remain within specification This criteria for re adjustment provides the best long term stability Performance data is measured during Performance Verification Tests and does not guarantee the multimeter will operate within the test limits unless the adjustment is performed Refer to Calibration C...

Page 62: ... 1 year specifications DC Current Fluke 5520A 1 5 instrument 1 year specifications AC Voltage Fluke 5520A 1 5 instrument 1 year specifications AC Current Fluke 5520A 1 5 instrument 1 year specifications Resistance Fluke 5520A 1 5 instrument 1 year specifications Frequency Fluke 5520A 1 5 instrument 1 year specifications Capacitance Fluke 5520A 1 5 instrument 1 year specifications Diode Fluke 5520A...

Page 63: ...ction press momentarily to turn backlight ON at medium level of brightness intensity Press again to toggle the highest level of brightness intensity The backlight turns OFF automatically after setting period Alternatively you can press for the third time to turn the backlight OFF Testing the Display To view all segments of the display press and hold the button while turning the rotary switch from ...

Page 64: ...r sounds an alerting beep when the μA mA input terminal detects a voltage level of higher than 1 6 V The display indicates a flashing CErr annunciator until the test lead is removed from the μA mA input terminal Calibration Process 1 Prior to performing the verification tests see Test Considerations 2 Perform the verification tests to characterize the multimeter see Performance Verification Tests ...

Page 65: ...formance verification test ensure that the multimeter has been switched ON and placed in the test environment for at least one hour with J K type thermo couple connected between the multimeter and calibration source Allow one minute warm up period with a Shorting Plug connected to the V and COM input terminals Use shielded twisted pair PTFE insulated cables to reduce settling and noise errors Keep...

Page 66: ...imeter Cable shields should be earth ground referenced This configuration is recommended for optimal noises and settling time performance during calibration Performance Verification Tests The performance verification tests are recommended as acceptance tests when you first receive the multimeter The acceptance test results should be compared against the one year test limits After acceptance you sh...

Page 67: ...mV 100 V 100 00 V 110 mV 1000 V 1000 0 V 2 V 2 Press to go to V function 1000 mV 1000 0 mV 500 Hz 10 5 mV 1000 0 mV 1 kHz 20 5 mV 10 V 10 000 V 500 Hz 105 mV 10 000 V 1 kHz 105 mV 10 000 V 2 kHz 205 mV 100 V 100 00 V 500 Hz 1 05 V 100 00 V 1 kHz 1 05 V 100 00 V 2 kHz 2 05 V 1000 V 1000 0 V 1 kHz 10 5 V 3 Press to go to frequency mode 100 Hz 1 000 V 70 Hz 51 mHz 1000 Hz 1 000 V 1000 Hz 600 mHz 10 k...

Page 68: ...μF 20 4 μF 10 mF 10 000 mF 0 204 mF 7 Turn the rotary switch to position 1000 μA 1000 0 μA 1 3 μA 10000 μA 10000 μA 13 μA 8 Press to go to μA function 1000 μA 1000 0 μA 500 Hz 10 5 μA 1000 0 μA 1 kHz 15 5 μA 10000 μA 10000 μA 500 Hz 105 μA 10000 μA 1 kHz 155 μA 9 Turn the rotary switch to position 100 mA 100 0 mA 0 23 mA 440 mA 400 0 mA c 2 3 mA 10 Press to go to mA function 100 mA 100 00 mA 500 H...

Page 69: ...r 15 seconds maximum After measuring a current of 10 A leave the multimeter to cool down for 60 seconds before applying low current measurement e Only available in U1242B f Set both Fluke 5520A and multimeter to internal reference Prior to performing measurements connect one end of the K type thermocouple with miniature TC connector on both ends to the 5520A TC output and the other end to a precis...

Page 70: ...to 1234 when the multimeter is shipped from the factory The security code is stored in non volatile memory and does not change when power is off Unsecuring the Multimeter from the Front Panel 1 Turn the rotary switch to 2 Press and simultaneously to enter the Calibration Security Code entry mode The primary display shows 5555 and the secondary display shows SEU 3 Press or to step each character in...

Page 71: ...display will show PASS If the new code failed to save the multimeter will shows error code E07 on the secondary display for approximately 3 seconds and return to the Calibration Security Code setting mode Unsecuring the Multimeter Without the Security Code 1 Record the last 4 digit serial numbers of the multimeter 2 Turn the rotary switch to 3 Press and simultaneously to enter the Calibration Secu...

Page 72: ...e Adjustment Mode Unsecure the multimeter see Unsecuring the Multimeter for Calibration or Unsecuring the Multimeter Without the Security Code Once the multimeter has been unsecured the reference value will be indicated on the primary display Entering Adjustment Values 1 Press and to step through each character in the primary display 2 Press and to change the value of the corresponding character f...

Page 73: ...multimeter It is recommended to wait for one minute before start performing the calibration 4 During ambient temperature adjustment ensure that the multimeter has been turned on for at least one hour with K type thermocouple connected between the multimeter and calibration source NOTE After each adjustment the secondary display shows PAS If the calibration fails the multimeter beeps and an error n...

Page 74: ...V 100 V 1000 V 0 9 to 1 1 x Full Scale 1 V 0 9 to 1 1 x Full Scale Ω 1000 Ω 10 kΩ 100 kΩ 1000 kΩ 10 MΩ 0 9 to 1 1 x Full Scale 1000 nF 10 μF 100 μF 1000 μF 10 mF 0 9 to 1 1 x Full Scale 1000 μA 10000 μA 0 9 to 1 1 x Full Scale 100 mA 1000 mA 0 9 to 1 1 x Full Scale 10 A 0 9 to 1 1 x Full Scale T1 0 C Ensure that 0 C with ambient compensation is provided DCmV T1 100 mV 0 9 to 1 1 x Full Scale V CAU...

Page 75: ...put reading There is no bar graph display for temperature adjustment 6 Enter the actual applied input see Entering Adjustment Values 7 Press to start the adjustments The CAL flashes in the secondary display indicating the calibration is in progress 8 Upon completion of each adjustment value the secondary display will show PAS If the adjustment failed the multimeter will sound a long beep and the c...

Page 76: ...justments Step Test Function Cal Range Input Reference Value Cal Item U1241B U1242B 1 Turn the rotary switch to position Short Dual banana plug with copper wires short between two terminals SHrt 1000 mV 1 V 1000 0 mV 10 V 10 V 10 000 V 100 V 100 V 100 00 V 1000 V 1000 V 1000 0 V 2 Press to go to V function 1000 mV 30 mV 70 Hz 30 0 mV 1000 mV 70 Hz 1000 0 mV 1000 mV 1 kHz 1000 0 mV 10 V 1 V 70 Hz 1...

Page 77: ...emove all test leads and shorting plugs from input terminals oPEn 10 MΩ 10 000 MΩ 1000 kΩ 1000 kΩ 1000 0 kΩ 100 kΩ 100 kΩ 100 00 kΩ 10 kΩ 10 kΩ 10 000 kΩ 1000 Ω 1000 Ω 1000 Ω 5 Turn the rotary switch to position Open Input terminals open remove all test leads and shorting plugs from input terminals oPEn 1000 nF 400 nF 400 0 nF 1000 nF 1000 0 nF 10 μF 10 μF 10 000 μF 100 μF 100 μF 100 00 μF 1000 μF...

Page 78: ...70 Hz 100 0 μA 1000 μA 70 Hz 1000 0 μA 10000 μA 1000 μA 70 Hz 1000 μA 10000 μA 70 Hz 10000 μA 8 Turn the rotary switch to position Open Input terminals open remove all test leads and shorting plugs from input terminals oPEn 100 mA 100 mA 100 00 mA 1000 mA 320 mA 320 0 mA 9 Press to go to mA function 100 mA 5 mA 70 Hz 5 00 mA 10 mA 70 Hz 10 00 mA 100 mA 70 Hz 100 00 mA 1000 mA 100 mA 70 Hz 100 0 mA...

Page 79: ... 500 A 1 A 70 Hz 1 000 A 10 A 70 Hz 10 000 A 12 Turn the rotary switch to T1 or T1T2 position a Short Dual banana plug with copper wires short between two terminals SHrt 100 mV 100 mV 100 00 mV 13 Press to go to T1 function a K type 0 ºC 000 0 ºC a Set the 5520A to internal reference Prior to performing adjustment connect one end of the K type thermocouple with miniature TC connector on both ends ...

Page 80: ...old for more than one second to view the calibration count viewing mode The primary display indicates the calibration count value while the secondary display indicates Cnt 2 Take note of the calibration count to keep track of the number of calibration counts that has been performed 3 Press and hold for more than one second to exit the calibration count mode Calibration Errors The following error c...

Page 81: ...eter User s and Service Guide 81 6 Characteristics and Specifications For the characteristics and specifications of the U1241B and U1242B Handheld Digital Multimeter refer to the datasheet at http literature cdn keysight com litweb pdf 5989 7040EN pdf ...

Page 82: ...6 Characteristics and Specifications 82 Keysight U1241B and U1242B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 83: ...n is subject to change without notice Always refer to the Keysight website for the latest revision Keysight Technologies 2009 2016 Edition 17 March 18 2016 Printed in Malaysia U1241 90063 U1241 90063 www keysight com ...

Search results

Summary of Contents for U1241B

Reviews:

Related manuals for U1241B

Brands by name

Popular brands

Keysight U1241B, User'S And Service Manual

Search results

Summary of Contents for U1241B

Reviews:

Related manuals for U1241B

Brands by name

Popular brands