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Keysight U1401B Handheld Multi

1. 3 In this example we will use a BJT with TO 92 package as shown in Figure 5 7 Most TO 92 transistors will have pin 1 as the emitter Figure 5 7 0 92 Transistor 4 Probe pin 1 with the red test lead and pin 2 with the black test lead If the measured value is OL reverse the probes If the measured value is still OL you can assume that these two pins are the emitter and collector terminals The remaining pin 3 is the base terminal Always find out first which pin is the Base terminal Refer to Table 5 2 U1401B User s and Service Guide U1401B User s and Service Guide Application Examples 5 Table 5 2 Base terminal according to probe test Probe the base terminal with the red test lead and the other two pins in turn with the black test lead Record the readings Repeat step 5 but reverse the red and black test leads Record the readings The polarities NPN or PNP and terminals can be identified by referring to Table 5 3 Table 5 4 and Table 5 5 Vpe is always greater than Vpe Most TO 92 transistors will have pin 1 as the emitter It is recommended that you check and verify with the specific data sheet from the manufacturer Table 5 3 Polarity and terminals if Pin 3 is the base Red Black 0 6749 V 0 6723 V 0 6723 V 0 6749 V co NN oe nw ete et 5 Application Examples 100 Table 5 4 Polarities and terminals if Pin 2 is the base Red Black osnov osav EBC O NPN Black Red 0 674
2. LECo DULI LEL Press A Yv CHOL Press A LECI IOLL lt A Figure 4 4 Setting the beeper frequency U1401B User s and Service Guide 73 4 Changing the Default Settings Setting the minimum measurable frequency This setting will influence the measurement rates for frequency duty cycle and pulse width The typical measurement rate as defined in the general specifications is based on a minimum frequency of 1 Hz Press W Press A Press A q Figure 4 5 Setting the minimum frequency 74 U1401B User s and Service Guide Changing the Default Settings 4 Setting the percentage scale readout This function converts the DC current measurement display to a percentage scale readout from 0 to 100 based on a range of 4 mA to 20 mA or 0 mA to 20 mA For example a 25 readout represents DC 8 mA for the 4 mA to 20 mA range or DC 5 mA for the 0 mA to 20 mA range You may choose between the two available ranges Press W ey aay OCT L I CLS Press A Vv Press A lt A Figure 4 6 Setting the percentage scale readout U1401B User s and Service Guide 75 4 Changing the Default Settings Setting the print mode Setting this feature on enables the printing of measured data to a PC connected to the instrument for remote communication when a measurement cycle is completed In this mode the instrument automatically and continuously sends the latest data to the host but does not
3. 8 Use the A or w arrow keys to select the Cal range 9 Apply the input signal shown in the Input column of the table 10 The secondary display will now show the value of the 11 input voltage that is needed press the HOLD button to switch between the Offset and Gain values The secondary display will now show the Offset or Gain values Press to complete the calibration tests 12 Repeat steps 5 through 10 for each adjustment point 13 To exit the calibration mode press and for U1401B User s and Service Guide more than one second 139 7 Performance Tests and Calibration Table 7 5 Calibration tests sue Tents Gaus tne Turn the rotary switch to mV 50 mV Short Dual banana plug Press to select DC with copper wire shorted between 2 terminals 500 mV Short Dual banana plug with copper wire shorted between 2 terminals 450 mV 450 mV 450 00 mV Turn the rotary switch to 5 V Short Dual banana plug Z V Press to select with copper wire DC shorted between 2 terminals 50 V Short Dual banana plug with copper wire shorted between 2 terminals 500 V Short Dual banana plug with copper wire shorted between 2 terminals 450 V 450 V 450 00 V 1000 V Short Dual banana plug with copper wire shorted between 2 terminals 900 V 900 V 900 0 V 140 U1401B User s and Service Guide Performance Tests and Calibration 7 Table 7 5 Calibration tests so rma O oee O e we Turn the rotary switch to mV 50 mV
4. M The accuracy is defined for meter operation only and excludes the tolerance of thermocouple probe The instrument should be placed in the operating area for at least one hour with the slide switch set at the M position for meter operation only 154 U1401B User s and Service Guide Specifications 8 Frequency specifications Table 8 8 Frequency specifications 100 Hz 0 001 Hz 0 02 3 1 Hz 250 Vrms Frequency sensitivity and trigger level for voltage measurement For the maximum input voltage frequency product V Hz and input impedance refer to AC voltage measurement Table 8 9 Frequency sensitivity and trigger level specifications for voltage measurement U1401B User s and Service Guide 155 156 Specifications Duty cycle l Table 8 10 Duty cycle specifications DC coupling 0 1 to 99 9 0 3 per kHz 0 3 AC coupling 5 to 95 Pulse width 2 Table 8 11 Pulse width specifications 0 01 ms to 1999 9 ms 0 2 3 M The accuracy for duty cycle and pulse width is based on a 5 V square wave input to the DC 5 V range 2 Pulse width must be greater than 10 us and its range and resolution are deter mined by the frequency of the signal Refer to Table 8 8 for details Frequency sensitivity for current measurement For maximum input refer to AC voltage measurement Table 8 12 Frequency sensitivity specifications for current measurement Minimum sensitivity rms sine wave Input range 30 Hz to
5. a Ff taa oo ic gt ANULL DUAL Press and hold WAKA om AUTO OUTPUT Turn on CAT II 150V TRUE RMS Figure 4 1 Entering the setup mode 66 U1401B User s and Service Guide Changing the Default Settings 4 3 To configure a menu item in the setup mode perform the following steps i Press lt or gt to scroll through the available menu items ii Press A or w to change or select the setting See Table 4 1 on page 68 for details on the available options iii Press to save the changes These parameters will remain in the non volatile memory 4 Press SHIFT for more than one second to exit the setup mode U1401B User s and Service Guide 67 4 Changing the Default Settings Available Setting Options Table 4 1 Setup options and default settings Available setting options Default factory setting Data Hold OFF Enables data hold manual trigger data hold Enables data hold manual trigger trigger Refresh Hold aa 1000 Sets the variation count for refresh hold auto trigger Temperature 1 Selects the temperature unit Four combinations can be selected e C only 267 lt F e F only ae aes bEEP Beep 4800 Hz Sets the beeper frequency 4800 Hz 2400 Hz 1200 Hz 600 Hz Disables the beeper FrEq Minimum 0 5 Hz 1 Hz Sets the minimum frequency that can be 0 5 Hz frequency 2 Hz measured measurement PECnt Percentage scale 4 20mA Selects which percent scale readout is used 4 20 mA 0 20mA
6. CAT II 150V TRUE RMS CE OUTPUT INPUT SAA AA gt 0 0 OO Figure 3 6 Enabling and disabling the continuity test U1401B User s and Service Guide 55 3 Making Measurements Alerts and Warning During Measurement Overload alert for voltage measurement WARNING For your own safety please do not ignore the overload alert When the instrument gives you an overload alert immediately remove the test leads from the source being measured This instrument provides an overload alert for voltage measurement in both auto and manual range modes The instrument starts to beep periodically once the measured voltage exceeds 251 V Immediately remove the test leads from the source being measured 56 U1401B User s and Service Guide Making Measurements 3 Math Operations Dynamic recording The dynamic recording mode can be used to detect intermittent turn on or turn off voltage or current surges and to verify measurement performance without your supervision While the readings are being recorded you may perform other tasks The average reading is useful for smoothing out unstable inputs estimating the percentage of time a circuit is operated and verifying circuit performance The operating procedure is described below 1 Press MAX MIN for more than 1 second to enter the dynamic recording mode The instrument is now in continuous mode non data hold mode and the instrument will display the MAX AVG MIN annun
7. Constant Current Operation The U1401B can generate a constant current output in the range of 25 mA To select the constant voltage output function 1 Turn the rotary switch to any one of the 2 constant current output positions 2 Press SHIFT to access the shifted operations of the keypad The annunciator will appear on the display 3 Press MODE to cycle through 25 mA 25 mA and 25 mA output modes Select the 25 mA output mode for constant output or steady output as opposed to autoscan or autoramp outputs which will be discussed under Memory Generation on page 31 e Unlike the autoscan and autoramp modes there is no special annunciator on the display to indicate constant current CC operation 4 With the instrument in standby mode you should see the annunciator on the display if not press OUTPUT you can adjust the amplitude of the output by pressing lt and to select the digit to be adjusted and then pressing A and w to adjust the value of the selected digit 5 Press OUTPUT to start the source output The annunciator will appear on the display 30 U1401B User s and Service Guide Calibrator Output Operations 2 Memory Generation For constant voltage and current outputs the U1401B offers two additional useful functions One is an autoscan output that is able to generate up to 16 different steps of constant voltage or current each with its own user defined amplitude and time interval The other
8. Print Print On or OFF ON Enables automatic and continuous transmission of data to PC Echo Echo On or OFF ON Enables the return of characters to PC in remote communication dAtAb Data bit 8bit or bit Sets the data bit length for remote Stop bit is communication with a PC remote control always 1bit 68 U1401B User s and Service Guide Changing the Default Settings 4 Table 4 1 Setup options and default settings continued Available setting options Default factory setting PArtY Parity En odd or Sets even odd or no parity check for remote nonE nonE communication with a PC remote control bAud Baud rate 2400 Hz Sets baud rate for remote communication with 9600 Hz 4800 Hz a PC remote control 9600 Hz 19200 Hz bLit Display backlight 1to 99s Sets the timer for automatically turning off the 30 sec timer LCD display backlight OFF Disables the LCD display backlight from automatically turning off AoFF Auto power off Sets the timer for auto power off 15 min Disables auto power off 1 The temperature menu item will only be visible and selectable if the shifted mode is on Press SHIFT for more than one second to enable the temperature options Setting the data hold refresh hold mode e To enable the data hold mode manual trigger set this parameter as OFF e To enable the refresh hold mode automatic trigger set the variation count within the range of 100 to 1000 Once the variation of the measured value exc
9. Simulation Mode for mA Output 88 Simulating a 2 wire transmitter on a current loop 90 Measuring a Pressure Transducer 92 Zener Diode Test 94 Diode Test 96 Bipolar Junction Transistor BJT Test 98 Determining transistor h 102 Junction Field Effect Transistor JFET Switch Test 104 Operational Amplifier Verification 108 Current to voltage converter 108 Voltage to current converter 110 Integrator square wave to triangle wave conversion 111 2 Wire Transmitter Verification 113 Frequency Transmitter Verification 115 Maintenance Maintenance 118 General maintenance 118 Battery replacement 119 Recharging the batteries 121 Fuse replacement 122 Troubleshooting 124 Performance Tests and Calibration Calibration Overview 128 XIII Contents Closed case electronic calibration 129 Keysight Technologies calibration services 129 Calibration interval 129 Other recommendations for calibration 130 Environmental conditions 130 Warm up 130 Recommended Test Equipment 131 Performance Verification Tests 132 Self verification 132 Input performance verification 133 Output performance verification 137 Adjustment Considerations 138 Adjustment Procedures 139 Input calibration 139 Output calibration 144 8 Specifications General Specifications 148 Measurement Category 150 Measurement category definitions 150 Input Specifications 151 DC specifications 151 AC specifications 152 AC DC specifications 153 Temperature specificatio
10. and connect the black output alligator lead to the black input probe lead Gradually decrease the voltage output from 00 000 V to 15 000 V The Rpg value will increase correspondingly Figure 5 12 on page 107 Observe at what point the resistance reading becomes OL the voltage bias level at that point would be the cutoff voltage for the p channel JFET TO 92 eo N 9 out 00 000 v J174 l OUT 15 000v 100k TO OUTPUT 107 5 Application Examples Operational Amplifier Verification 108 The ideal amplifier is assumed to have the following characteristics e Infinite gain e Infinite input impedance e Infinite bandwidth a bandwidth extending from zero to infinity e Zero output impedance e Zero voltage and current offset There are two basic ways of applying feedback to a differential operational amplifier One is by configuring the operational amplifier as an inverting current to voltage converter and the other by configuring the operational amplifier as a non inverting voltage to current converter Current to voltage converter An ideal operational amplifier can act as a current to voltage converter In Figure 5 13 the ideal operational amplifier maintains its inverting input terminal at earth potential and forces any input current to flow through the feedback resistor Thus I If and Vo Ip x Re Notice that the circuit provides the basis for an ideal current measurement it i
11. 00 second Cycle mode CyCLE This is similar to the Continuous mode but it steps the output through only one cycle The output will vary according to the amplitudes and time intervals defined in the memory starting from step 1 until the step where the time interval is 00 second The output level will then be maintained at the amplitude of the last step before the zero interval step For instance according to the default settings the output signal will follow step 1 through step 11 and then remain at step 11 Step mode StEP This is a step by step output mode You can manually select which step of the user defined signals you want to output After selecting this mode press A or W to select which step to output The output amplitude will be maintained until you select another step as the output 5 Press OUTPUT to start the source output The annunciator will appear on the display Continuous and Cycle outputs always start from step 1 If the time interval of step 1 is OO second the output level will be set to the amplitude of step 1 and the output status will be set to SBY If you stop the signal output in the continuous or cycle mode the next output step will start from step 1 U1401B User s and Service Guide Calibrator Output Operations 2 Table 2 1 Default settings for the autoscan output Mode 1 5000 V GCA E15 000 V GCA 25 000 mA son Ame Twine Ange Tina Alta Tineret e omy me osv
12. 1 kHz 5mv Bmy f 5 000mv Press to select AC Turn the rotary switch to 5 V 1 kHz Sag Press to select U1401B User s and Service Guide 141 7 Performance Tests and Calibration Table 7 5 Calibration tests Osen montuese cre o Turn the rotary switch to 500 Q Short Dual banana plug Q with copper wire shorted between 2 terminals 450 Q 450 Q 450 00 Q 5 KQ Short Dual banana plug with copper wire shorted between 2 terminals 4 5 KQ 4 5 KQ 4 5000 kQ2 Short Dual banana plug Short with copper wire shorted between 2 terminals 45 kQ EETHEN kQ 45 000 kQ Short Dual banana m Short with copper wire shorted between 2 terminals 450 kQ 450 kQ 450 00 kQ Short Dual banana plug Short with copper wire shorted between 2 terminals 4 5 MQ 4 5 MQ 4 5000 MQ Short Dual banana plug Short with copper wire shorted between 2 terminals 30 MQ 30 MQ 30 000 MQ 15 MQ 15 MQ 15 000 MQ 142 U1401B User s and Service Guide Performance Tests and Calibration 7 Table 7 5 Calibration tests sue Toten core tne Turn the rotary switch to gt Diode Short Dual banana plug with copper wire shorted between 2 terminals Turn the rotary switch to 50 mA 5 000 mA mA position Press to select DC 450 mA 450 00 mA Turn the rotary switch to the 50 mA 1 kHz 5 000 mA Av MA position Press to select AC 500 mA 1 kHz 50 00 mA 450 mA 450 00 mA Temperature calibration 1 In calibration
13. Other recommendations for calibration Specifications are only guaranteed within the specified period from the last calibration Keysight recommends that readjustment should be performed during the calibration process for best performance This will ensure that the Handheld Multi Function Calibrator Meter remains within its specifications This calibration criterion provides the best long term stability During performance verification tests only the performance data is collected these tests do not guarantee that the instrument will remain within the specified limits The tests are only for identifying the functions which need adjustment Environmental conditions Warm up 130 Calibration or verification tests should be performed under laboratory conditions where the ambient temperature or relative humidity can be controlled Allow at least 20 minutes for the intrument to warm up before performing calibration After being exposed or stored in a high humidity condensing environment a relatively longer recovery period is required U1401B User s and Service Guide Performance Tests and Calibration 7 Recommended Test Equipment The test equipment recommended for the performance verification and adjustment procedures are listed below If the exact instrument is not available substitute with another calibration standard of equivalent accuracy Table 7 1 Recommended test equipment Recommended accuracy Application Recommende
14. Service Guide 37 2 Calibrator Output Operations Continuous HU LONE w LULLE v AUTO DC TOT rc ALLOLLI gt AnA LILILILILE Figure 2 4 Selecting autoramp output mode End position Size of each step end amplitude start amplitude resolution Size of each step start amplitude end amplitude resolution Start p position Figure 2 5 Ramp output Defining the autoramp parameters in the memory Press and hold MODE for more than one second to enter the autoramp adjustment mode The ramp function is a dual slope output You may adjust the number of steps between the start and end positions or the end and start positions and the amplitudes of the start and end positions When the U1401B is in the autoramp adjustment mode the secondary display shows the amplitude of the start or end position The first digit on the left of the primary display is 38 U1401B User s and Service Guide U1401B User s and Service Guide Calibrator Output Operations 2 used to indicate the start or end position The last three digits of the primary display are used to indicate the number of steps the number of steps from start to end 1 Press MODE to cycle through position start or end number of steps and amplitude adjustment The digit to be adjusted will flash on the display e For adjusting the amplitude to adjust the value of the selected digit The amplitude can be set to a
15. Turn the rotary switch to Q Turn the rotary switch to mA Press to select DC Turn the rotary switch to AS mA Press to select AC U1401B User s and Service Guide Connection to 5520A Connect the Normal Hi Low output terminals of the calibrator to the U1401B input terminals Connect the Normal Hi Low output terminals of the calibrator to the U1401B input terminals Connect the Normal Hi Low output terminals and the AUX Hi Low output terminals of the calibrator with a two cable stacked configuration to the U1401B input terminals Connect the AUX Hi Low output terminals of the calibrator to the U1401B input terminals Connect the AUX Hi Low output terminals of the calibrator to the U1401B input terminals Performance Tests and Calibration 7 Error from nominal 1 Range 5520A output year 100 Hz 10 Hz 5 mHz 16 mV 100 kHz 20 kHz 7 Hz 16mV 200 kHz 200 kHz 30 kHz 24 mV 0 1 to 99 50 50 Hz 0 3 5 Vac 50 800 Hz 0 3 5 Vac 0 5 A 0 45 A 0 185 mA 0 005 A 50 pA 1 kHz 0 045 A 0 29 mA 1 kHz 0 05 A 0 5 mA 50 Hz 0 45 A 2 9 mA 60 Hz 135 7 Performance Tests and Calibration Table 7 3 Input performance verification tests continued 136 Turn the rotary switch to gt Turn the rotary switch to mV Press and hold for more than 1 second Connect a diode to the U1401B input terminals in forward bias position Connect K
16. batteries immediately The instrument is powered by four sets of rechargeable batteries To ensure that the instrument performs within its specifications it is recommended that you replace the batteries immediately when the low battery annunciator starts flashing Below are the procedures for battery replacement 1 Loosen the screw of the battery cover on the rear panel 2 Slide the cover to the left pull it up and remove it See Figure 6 1 It is recommended that you replace all the batteries 4 To close the battery cover reverse the procedures above 6 119 6 Maintenance Loosen the screw na R Replace all 7 batteries Slide the cover to the left side Figure 6 1 Battery replacement 120 U1401B User s and Service Guide Maintenance 6 Recharging the batteries U1401B User s and Service Guide Do not discharge a battery by shorting It or subjecting it to reverse polarity Do not mix different types of battery Make sure a battery is rechargeable before charging it e Anew rechargeable battery comes in a discharged condition and must be charged before use Upon initial use or after a prolonged storage period the rechargeable battery may require three to four charge discharge cycles before achieving maximum capacity To discharge simply run the instrument using the rechargeable battery s power until it shuts down or until the low battery warning appears e In some instances the instrument may indicate
17. factor limit to avoid instrument damage and the risk of electric shock Table 8 3 AC mV voltage specifications Function Range Resolution ABHztoSkHz SkHzto20kKHz Overload protection AC mV voltage 50mv mV 0 7 40 1 5 40 250 Vrms auo eu E mV 10 uV 0 7 20 1 5 20 to 100 of range 1 Input impedance 1 1 MQ in parallel with lt 100 pF nominal for the range of 5 V and above and 1 GQ nominal for the 50 500 mV range Crest factor lt 3 152 U1401B User s and Service Guide Table 8 4 AC current specifications True rms From 500 mA 10 uA 5 to 100 of range 1 Crest factor lt 3 AC DC specifications Table 8 5 AC DC mV voltage specifications voltage 500 mV 10 uV 0 8 25 True rms From 5 U1401B User s and Service Guide Specifications 8 0 06 V 1 Q 250 V 630 mA 0 6 V 1 Q 1 6 70 1 6 25 Quick acting fuse 250 Vrms 1 Input impedance 1 1 MQ in parallel with lt 100 pF nominal for the range of 5 V and above and 1 GQ nominal for the 50 500 mV range Crest factor lt 3 153 8 Specifications Table 8 6 AC DC current specifications AC DC 0 7 25 0 06 V 1 Q 250 V 630 mA current T F ai 10 uA 0 6 V 10 Quick acting fuse rue rms From 5 to 100 of range M Crest factor lt 3 Temperature specifications Table 8 7 Temperature specifications Temperature l K 40 C to 1372 C 0 3 3 C 250 Vrms mean oe
18. least 15 minutes e For quick measurements use the 0 C compensation to observe the temperature variation of the thermocouple sensor The 0 C compensation makes it possible for you to measure the relative temperature immediately U1401B User s and Service Guide 51 3 Making Measurements To measure temperature follow these steps 1 Set the slide switch to the M position to disable the output 2 Turn the rotary switch to the MV position Press and hold for more than 1 second to select temperature measurement Plug the thermocouple adapter with the thermocouple probe connected to it into the positive and negative input terminals Figure 3 4 on page 53 Touch the surface to be measured with the thermocouple probe Read the display If you are working in a constantly varying environment where the ambient temperature is not constant follow these steps 1 52 Press to select 0 C compensation This allows a quick measurement of the relative temperature Avoid contact between the thermocouple probe and the surface to be measured After a constant reading is obtained press to set the reading as the relative reference temperature Touch the surface to be measured with the thermocouple probe Read the display for the relative temperature U1401B User s and Service Guide Making Measurements 3 fe Agi U1401B ays Agilent Multi Function Calibrator Meter 0O ibe pi
19. mode turn the rotary switch to any one of the Current Input Voltage Output positions 2 Connect the output terminals to a recommended multimeter refer to Table 7 1 on page 131 for the recommended test equipment Follow the steps below to perform calibration for the output voltage ranges and values listed in Table 7 7 1 As you enter each calibration step the primary and secondary displays show the output current value and rdy respectively 2 Press OUTPUT The primary and secondary displays show the output current value and 00000 respectively which means the present output level is as shown on the primary display 3 Press A or w to adjust the output current until the multimeter reading is the same as the value shown on the primary display 4 Press MODE to enter the next calibration step Table 7 7 Output current calibration steps Calibration Current range step Output current value At the end of the last calibration step the primary display will show PASS after the MODE button is pressed 146 U1401B User s and Service Guide KEYSIGHT TECHNOLOGIES U1401B Handheld Multi Function Calibrator Meter User s and Service Guide 8 Specifications General Specifications 148 Measurement Category 150 Measurement category definitions 150 Input Specifications 151 DC specifications 151 AC specifications 152 AC DC specifications 153 Temperature specifications 154 Frequency specifications 155 1
20. mode turn the rotary switch to the mV position 2 Press for more than one second to enter temperature calibration 3 Plug a K type thermocouple into the input terminal Feed in the reference input signal that represents 0 C and wait for 10 minutes 4 Press to finish the temperature calibration U1401B User s and Service Guide 143 7 Performance Tests and Calibration Output calibration 1 Set the slide switch to the M S position 2 Allow the instrument to warm up for 10 minutes before performing calibration 3 To enter the calibration mode press and for more than one second The primary display will indicate CHEEP 4 Press to enter the input calibration mode 5 Turn the rotary switch to any one of the Current Input Voltage Output positions and press SHIFT for more than one second to enter the output calibration mode CAL 0 amp CAL 1 In the output calibration mode the primary and secondary display will show CAL 0O and rdy respectively Connect the output terminals to a multimeter refer to Table 7 1 on page 131 for the recommended test equipment e CAL 0 1 Press OUTPUT The primary and secondary displays show CAL 0 and 00000 respectively 2 Wait until the instrument reading becomes stable then record the value e CAL 1 1 Press MODE The primary and secondary displays show CAL 1 and rdy respectively 2 Press OUTPUT The primary and secondary displays sho
21. ms peak hold specifications 157 Resistance specifications 157 Diode check and audible continuity specifications 158 Output Specifications 159 Constant voltage and constant current outputs 159 Square wave output 160 This chapter details the specifications of the Handheld Multi Function Calibrator Meter Specifications General Specifications 148 Display Both primary and secondary displays are 5 digit liquid crystal display LCD with a maximum reading of 51 000 counts and automatic polarity indication Power Consumption Charging battery 9 3 VA typical DC constant current at 25 mA maximum load 5 5 VA typical on 24 V DC adapter or 2 4 VA typical on 9 6 V batteries Meter only 1 8 VA typical on 24 V DC adapter or 0 6 VA typical on 9 6 V batteries Power Supply Rechargeable batteries 1 2 V x 8 pieces Ni MH no cadmium lead or mercury External switching adapter AC 100 V to 240V 50 60 Hz input and DC 24 V 2 5 A output Operating Environment Full accuracy at 0 C to 40 C 32 F to 104 F Full accuracy up to 80 Relative Humidity RH for temperature up to 31 C decreasing linearly to 50 RH at 40 C Storage Compliance 20 C to 60 C 4 F to 140 F with batteries removed Safety Compliance IEC 61010 1 2001 EN61010 1 2001 2nd Edition Canada CAN CSA C22 2 No 61010 1 04 USA ANSI UL 61010 1 2004 Measurement Category CAT II 150V Pollution Degree 2 Environment EMC Compliance IEC613
22. oee oma oee Oe omv n omv mee fonna see Oe famy n s mee omma oee Oe famy ne s mee foenn oee U1401B User s and Service Guide 33 2 Calibrator Output Operations Continuous i GHIFT sey LONE GHIFT sey CLEP AUTO DC AUTO DC Step messing OO pipipigig ro ALLOLLI oc LALLI ro LILILILILt lt q or gt Figure 2 1 Selecting autoscan output mode Amplitute a STEP s2 s2 S3 S3 S4 S4 S5 S5 S6 S6 S7 S7 8 8 s9 s9 S10 S10 Continuous s11 h 55 S12 S12 S13 S13 S14 S14 S15 S15 ONE CYCLE S16 S16 second Time interval Figure 2 2 Example of a typical autoscan output 34 U1401B User s and Service Guide Calibrator Output Operations 2 Defining the autoscan parameters in the memory Press and hold MODE for more than one second to enter the autoscan adjustment mode A total of 16 steps with individually definable time interval and amplitude are available When the instrument is in the autoscan adjustment mode the secondary display shows the amplitude The first two digits of the primary display are used to indicate which step is being adjusted The last two digits of the primary display are used to indicate time interval 1 Press MODE to cycle through step time interval and amplitude adjustments The digit to be adjusted will flash on the display e For amplitude adjustment press lt and gt to select the digit to be adjusted and then press A
23. one is an autoramp output with user defined dual slopes and number of steps for linear simulation Autoscan output To set the autoscan output 1 Turn the rotary switch to any one of the 2 constant current output or constant voltage output positions 2 Press SHIFT to access the shifted operations of the keypad The annunciator will appear on the display 3 Follow one of the instructions below e For voltage output press MODE to cycle through 1 5 V 15 V 1 5 V 15 V 1 5 V and 15 V output modes Select one of the two output modes depending on the voltage range you require e For current output press MODE to cycle through 25 mA 25 mA and 25 mA output modes Select the output mode U1401B User s and Service Guide 31 2 32 Calibrator Output Operations 4 After selecting the required function press lt or gt to select one of three modes Continuous Cycle or Step The secondary display will indicate Cont CyCLE or StEP respectively Figure 2 1 on page 34 e Continuous mode Cont This mode will output a signal according to the amplitudes and time intervals defined in the memory starting from step 1 until the step where the time interval is 00 second then it will start again from step 1 For instance according to the default settings Table 2 1 on page 33 the output signal will follow step 1 through step 11 and then return to step 1 because the time interval of step 12 is
24. output and input Output or input units for secondary display Diode or audible continuity Audible continuity for resistance Trigger manual hold Dynamic recording mode Present value on primary display Dynamic recording mode Maximum value on primary display Dynamic recording mode Average value on primary display Dynamic recording mode Minimum value on primary display Alternating direct current Primary display for input BEBE U1401B User s and Service Guide 15 1 Getting Started Table 1 6 Description of display annunciators continued Input units for primary display Square wave output Positive or negative t trigger slope Positive slope for pulse width ms and duty cycle measurement Negative slope for pulse width ms and duty cycle measurement Percentage scale for 0 to 20 mA and 4 to 20 mA current measurement Without ambient temperature compensation 16 U1401B User s and Service Guide Getting Started 1 The terminals at a glance WARNING To avoid damaging this instrument do not exceed the rated input limit OUTPUT Figure 1 7 Terminals Table 1 7 Description of terminals ne oworin tation OUTPUT Orange For constant voltage constant current and square wave output functions INPUT Grey white For voltage current and resistance measurements and diode and audible continuity tests This instrument has four terminals The two terminals for input func
25. should be performed with the following considerations where applicable Allow the instrument to warm up and stabilize for five minutes before performing the adjustments Make sure that the batteries will not run low during the adjustments Replace or recharge the batteries before making adjustments to avoid false reading Consider the thermal effects as you connect the test leads between the calibrator and this instrument It is recommended that you wait for one minute after connecting the test leads before you begin the calibration During ambient temperature adjustment ensure that the instrument has been turned on for at least one hour with a K type thermocouple connected between the instrument and the calibration source Do not turn off the instrument during calibration This may delete the calibration memory for the present function U1401B User s and Service Guide Adjustment Procedures Performance Tests and Calibration 7 Input calibration Set the slide switch to the M S position Allow the instrument to warm up for 20 minutes before performing calibration To enter the calibration mode press and for more than one second The primary display will indicate CHEEP Press to enter the input calibration mode 5 Turn the rotary switch to the Test Function position as shown in the adjustment table The primary display will show the corresponding reference value of the Cal item Configure each Cal item
26. that the charging is complete after ten minutes or so when charging a new rechargeable battery This is a normal phenomenon with rechargeable batteries Remove the rechargeable battery from the device reinsert it and repeat the charging procedure This instrument is powered by four sets of rechargeable bat teries Charge the batteries immediately when the low bat tery annunciator starts flashing It is strongly recommended that you use only the specified type of 24 V AC adapter to charge these rechargeable batteries Do not turn the rotary switch while the instrument is being recharged because a DC 24 V supply is applied to the charging terminal Follow the procedures below to recharge the batteries 1 Power down the instrument and disconnect all the test leads from the terminals 2 Plug the AC adapter into the jack on the side panel Set the slide switch at the CHARGE position 4 The red light indicates that the batteries are being recharged 5 When the batteries have been fully recharged the green light turns on Remove the AC adapter and set the slide switch at the M or M S position 121 6 Maintenance CHARGE M M S os Set slide switch at the CHARGE position External AC Charging indication adapter jack Green Fully charged Yellow Charging Figure 6 2 Recharging the batteries Fuse replacement This manual provides only the fuse replacement procedures but not the fuse
27. the detailed information on how measurements are taken using the UI1401A 3 Making Measurements Measuring Voltage The U1401B performs true rms AC measurements that are accurate for square waves without any DC offset WARNING Make sure that the terminal connections are correct for a particular measurement before making the measurement To avoid damaging the U1401A do not exceed the rated input limit Measuring DC voltage 1 Turn the rotary switch to CV 2 Press to select DC voltage measurement 3 Connect the red and black test leads to the positive and negative input terminals respectively Figure 3 1 on page 47 4 Probe the test points and read the display 46 U1401B User s and Service Guide U1401B Multi Function Calibrator Meter MTI ol LOLL MODE lt gt A v HOLD A NULL DUAL mV SHIFT MAX MIN AUTO OUTPUT CE AC DC CAT II 150V TRUE RMS OUTPUT INPUT O 15 25mA MAX FUSED Figure 3 1 DC voltage measurement U1401B User s and Service Guide Making Measurements 3 A i 4 3 Making Measurements Measuring AC voltage 1 Turn the rotary switch to CV 2 Press to select AC voltage measurement Connect the red and black test leads to the positive and negative input terminals respectively Figure 3 2 4 Probe the test points and read the display ft Agilent U1401B Multi Function Calibrator Meter MODE lt R 2 HOLD aNuLt DUAL
28. used for a long period of time you may want to disable the auto power off feature When the auto power off feature is disabled the QFF annunciator will not be shown on the display The instrument will remain on until you manually turn the rotary switch to the OFF position or until the batteries run flat 82 U1401B User s and Service Guide Changing the Default Settings 4 Press W Hote Press A Ai Hare Press A Press A Figure 4 13 Setting the auto power off mode U1401B User s and Service Guide 83 4 Changing the Default Settings THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK 84 U1401B User s and Service Guide KEYSIGHT TECHNOLOGIES U1401B Handheld Multi Function Calibrator Meter User s and Service Guide D Application Examples Source Mode for mA Output 86 Simulation Mode for mA Output 88 Simulating a 2 wire transmitter on a current loop 90 Measuring a Pressure Transducer 92 Zener Diode Test 94 Diode Test 96 Bipolar Junction Transistor BJT Test 98 Determining transistor hy 102 Junction Field Effect Transistor JFET Switch Test 104 Operational Amplifier Verification 108 Current to voltage converter 108 Voltage to current converter 110 Integrator square wave to triangle wave conversion 111 2 Wire Transmitter Verification 113 Frequency Transmitter Verification 115 This chapter describes some application examples for the U1401B 5 Application Examples Source Mode for mA Output Th
29. x 0 5 8 mm 0950 5480 Power supply AC DC switching 60 W 1 output AC charger adapter 2110 1463 Fuse 63 mA 250 V time delay 20 x 5 2 x 5 2 mm 2110 1464 Fuse 0 63 A 250 V no time delay 20 x 5 2 x 5 25 mm U1401 38300 Bumper U1401 44700 Stand 126 U1401B User s and Service Guide KEYSIGHT TECHNOLOGIES U1401B Handheld Multi Function Calibrator Meter User s and Service Guide 7 Performance Tests and Calibration Calibration Overview 128 Closed case electronic calibration 129 Keysight Technologies calibration services 129 Calibration interval 129 Other recommendations for calibration 130 Environmental conditions 130 Warm up 130 Recommended Test Equipment 131 Performance Verification Tests 132 Self verification 132 Input performance verification 133 Output performance verification 137 Adjustment Considerations 138 Adjustment Procedures 139 Input calibration 139 Output calibration 144 This chapter contains the performance test procedures and adjustment procedures 7 Performance Tests and Calibration Calibration Overview CAUTION This instrument should only be calibrated by qualified personnel with the appropriate equipment For detailed information about the calibration procedures please contact your nearest Keysight Technologies representative or authorized distributor This manual contains procedures for verifying the instrument performance as well as procedures for making adjustments where necessary The perfo
30. y AUTO DH MAX AVGMIN DC I gigi ww LILILILIL LOOO y Press HAr s LOMIL y AUTO MAX DC Im LLILILt S Press Press Is Y H sey LOLLL y AUTO MIN DC InN LILI i Press T Ee LOL y AUTO AVG DC MLA LOUT Press Press Is Press Is Figure 3 7 Dynamic recording mode 59 3 Making Measurements Relative zero The relative function subtracts a stored value from the present measured value and displays the difference 1 2 3 Press to store the currently displayed reading as the reference value to be subtracted from subsequent measurements The A annunciator will be displayed The relative mode can be activated in both auto and manual ranges but it cannot be set if the present reading is overload OL Press to exit the relative mode There are two possible applications For a resistance measurement the display will read a non zero value even when no measurement is being taken due to the resistance of the test leads You can use the relative function to zero adjust the reading For a DC voltage measurement the thermal effect will influence the accuracy Use the relative function to offset the thermal effect Short the test leads and press when the displayed value has settled down to a stable state T T LOOOL LOOOL Da ba a ad a snnmnnn wl 190 IIe Figure 3 8 Relative zero mode 60 U1
31. 1B to identify a JFET by following the procedure below 1 Turn the rotary switch to the position 2 Connect the red and black test leads to the positive and negative input terminals respectively The positive terminal will provide a positive test voltage 3 In this example we will use a JFET with TO 92 package as shown in Figure 5 10 Most T0 92 JFET will have pin 1 as the drain Figure 5 10 T0 92 JFET 4 Probe pin 1 with the red test lead and pin 2 with the black test lead Then reverse the test leads and obtain the reading If both readings are lt 1 KQ you can assume that these pins are the drain and source terminals The remaining pin 3 is the gate terminal Always find out first which pin is the gate terminal Refer to Table 5 7 on page 105 U1401B User s and Service Guide U1401B User s and Service Guide Application Examples 5 Table 5 7 Gate terminal according to probe test Red Black Black Red You can identify the channel type of a JFET by measuring its drain source resistance Rpg when it is biased with a constant voltage source Usually both channel types will switch on under a gate source voltage Vag of 0 V 5 Connect the red input probe lead to the drain 6 Connect the black input probe lead to the source 7 Connect the red output alligator lead to the gate terminal through a 100 kQ resistor and connect the black output alligator lead to the black input probe lead If Rpg increases whe
32. 20 kHz U1401B User s and Service Guide Specifications 8 1 ms peak hold specifications Table 8 13 Peak hold specifications Signal width Accuracy for DC mV voltage current Single event gt 1 ms 2 400 for all ranges Resistance specifications The following resistance specifications are valid if the maximum open voltage is less than 4 8 V For continuity test the instrument will beep when the resistance is less than 10 00 Q Table 8 14 Resistance specifications 500 Ql 0 01 Q 0 15 8 0 045mA O mA 250 Vrms 5 kQu 0 15 5 mA 1 The accuracy of 500 Q and 5 kQ is specified after applying the relative function which is used to offset the test lead resistance and the thermal effect 2 For the 50 MQ range the R H is specified for lt 60 U1401B User s and Service Guide 157 8 Specifications Diode check and audible continuity specifications The overload protection is 250 Vrms and the instrument will beep when the reading is below 50 mV approximate Table 8 15 Diode check specifications 005 5 approximate 045mA lt H 48VDC 158 U1401B User s and Service Guide Specifications 8 Output Specifications Accuracy is given as of output counts of least significant digit at 23 C 5 C with relative humidity less than 80 R H and warmed up for at least five minutes Constant voltage and constant current outputs Table 8 16 Constant voltage CV output specifications M
33. 26 2 1 2005 EN61326 2 1 2006 Canada ICES NMB 001 2004 Australia New Zealand AS NZS CISPR11 2004 Measurement 3 times per second AC DC 1 time per second 1 time per second for frequency or duty cycle measurement gt 1 Hz 0 25 to 1 time per second for Pulse Width measurements gt 1 Hz Common Mode Rejection Ratio CMRR gt 90 dB at DC 50 60 Hz 0 1 1 kQ unbalanced Normal Mode Rejection Ratio NMRR gt 60 dB at DC 50 60 Hz 0 1 Temperature Coefficient Input 0 15 specified accuracy C from 0 C to 18 C or 28 C to 40 C Output 50ppm output 0 5dgt C U1401B User s and Service Guide Specifications 8 Dimensions H 192 mm W 90 mm D 54 mm Weight 0 98 kg with holster and batteries Battery Life Approximately 20 hours for meter functions only four hours for meter source Assuming fully charged Ni MH 1300 mA batteries are used Low battery indicator appears when the series battery voltage drops below 9V approximate Charging Time Approximately three hours in an environment of 10 C to 30 C If the battery has been fully discharged a prolonged charging time is required to bring the battery back to full capacity Warranty e Please refer to http www keysight com go warranty_terms Three years for the product Three months for the standard accessories unless otherwise specified e Please note that for the product the warranty does not cover Damage from contamination Normal wear and tea
34. 401B User s and Service Guide Making Measurements 3 Triggering Operations Data hold manual trigger The data hold mode allows you to hold the displayed value 1 Press to freeze the currently displayed value and enter the manual trigger mode The DH annunciator will appear on the display 2 Press the key again to trigger another new measured value and update the display The DH annunciator will flash momentarily before the new update 3 Press for more than one second to exit this mode Press HOLD r r sey BOLLOL LOO OO AUTO DH DH DC a D E G m D G ml AL J lo ILL Figure 3 9 Data hold mode U1401B User s and Service Guide 61 3 62 Making Measurements Refresh hold auto trigger The refresh hold mode freezes the displayed value until the reading variation exceeds the specified number of counts This function will autotrigger and update the held value with a new measured value When a new value is updated the instrument will beep once as a notification The keypad operation is similar to the operation of data hold mode 1 Make sure the refresh hold mode is enabled in the setup mode 2 Press to enter the refresh hold mode e The present value will be held and the DH annunciator will appear on the display e It will be ready to hold the new measured value once the variation of the instantaneous reading exceeds the preset variation count defined in setup mode whil
35. 9 V 0 6723 V EBC PNP Table 5 5 Polarities and terminals if Pin 1 is the base Red Black osnov osv Bec O NPN Black Red 0 6749 V 0 6723 V BEC PNP Another common type of transistor is the TO 3 package as shown in Figure 5 8 on page 101 U1401B User s and Service Guide U1401B User s and Service Guide Application Examples 5 Normally the case Is the collector terminal Figure 5 8 TO 3 Transistor A silicon NPN high power transistor 2N8055 is used as an example to demonstrate how the polarity and terminals are identified According to the previous procedure pin 2 is the base Table 5 6 Polarity and terminals if Pin 2 is the base Red Black o5702v ossssv ec NPN 101 5 102 Application Examples Determining transistor hy If you wish to obtain the correct results please adjust the values of Vpp and Ip according to the conditions specified by the transistor manufacturer For NPN type BJT 1 Turn the rotary switch to the C mA 2 position Connect the base to the positive output terminal Connect the emitter to the negative output terminal and the negative terminal of a DC power supply which supplies the required Vpp Connect the collector to the negative input terminal Connect the positive terminal of the DC power supply to the positive input terminal through a resistor Output a constant current of 1 000 mA this is Ip Read the measured current va
36. A simulation Disconnect the test lead from the current loop before turning the rotary switch to change function or to power off this instrument Failure to do so will result in a current of at least 16 mA in the 250 Q load connected loop In simulation mode the instrument simulates a current loop transmitter Use this simulation mode when an external DC 24 V or 12 V supply is in series with the current loop being tested Always use the special yellow test lead Follow the procedure below when performing mA output simulation 1 Turn the rotary switch to any one of the C mA A or ACV GA positions Connect the special yellow test lead between the positive output terminal of the instrument and the positive terminal of the measurement device on the current loop Refer to Figure 5 2 on page 89 Connect the black alligator lead between the COM terminal of the loop source and the negative terminal of the measurement device on the current loop Connect the red alligator lead between the negative output terminal of the instrument and the positive terminal of the current loop source Make sure the polarity is correct Set the current level of the calibrator between 0 mA and 20 mA Do not set a negative current output value Press OUTPUT to output the test current This connection can be used for any loop voltage from 12 V to 30 V U1401B User s and Service Guide CAUTION U1401B User s and Service Guide Application Examp
37. AUTION terminals of the instrument U1401B User s and Service Guide U1401B User s and Service Guide Application Examples 5 As Aoi U1401B oye Agilent Multi Function Calibrator Meter CY Excitation source Black Always use yellow test lead to perform mA simulation HI 12V 30V Figure 5 3 Use the yellow test lead to perform the 2 wire transmitter simulation 91 5 Application Examples Measuring a Pressure Transducer To measure a pressure transducer follow these steps 1 Turn the rotary switch to mV 2 Connect the red and black probe leads to the positive and negative input terminals respectively 3 Probe the test points Figure 5 4 on page 93 and read the display Table 5 1 Typical pressure range and maximum output voltages of millivolt output pressure transducers Pressure range Maximum output voltage 0 PSIG to 15 PSIG 100 mV 0 PSIG to 100 PSIG 100 mV 0 PSIG to 150 PSIG 92 U1401B User s and Service Guide U1401B User s and Service Guide Application Examples 5 MODE lt gt A v HoD T RANGE Ce SHIFT MAXMIN 4 mV AUTO CE CAT II 150V OUTPUT a y Lead wires 1 Red V 2 White Out BRIDGE IMPEDANCE 6 8KQ 3 Black V 4 Green Out Figure 5 4 Pressure transducer measurement 93 5 Application Examples Zener Diode Test 94 CAUTION To avoid damaging the instrument disconnect the c
38. Keysight U1401B Handheld Multi Function Calibrator Meter User s and KEYSIGHT Service Guide TECHNOLOGIES NOTICE This document contains references to Agilent Technologies Agilent s former Test and Measurement business has become Keysight Technologies For more information go to www keysight com KEYSIGHT TECHNOLOGIES U1401B User s and Service Guide Notices Keysight Technologies 2009 2015 No part of this manual may be reproduced in any form or by any means including elec tronic storage and retrieval or translation into a foreign language without prior agree ment and written consent from Keysight Technologies as governed by United States and international copyright laws Manual Part Number U1401 90055 Edition Edition 13 July 16 2015 Printed in Malaysia Keysight Technologies 1400 Fountaingrove Parkway Santa Rosa CA 95403 USA Warranty The material contained in this docu ment is provided as is and is sub ject to being changed without notice in future editions Further to the max imum extent permitted by applicable law Keysight disclaims all warran ties either express or implied with regard to this manual and any infor mation contained herein including but not limited to the implied warran ties of merchantability and fitness for a particular purpose Keysight shall not be liable for errors or for inciden tal or consequential damages in con nection with the furnis
39. No 61010 1 04 e USA ANSI UL 61010 1 2004 e 1EC61326 2 1 2005 EN61326 2 1 2006 e Canada ICES NMB 001 2004 e Australia New Zealand AS NZS CISPR11 2004 Degradation of some product specifications can occur in the presence of ambient electromagnetic EM fields and noise that are coupled to the power line or 0 cables of the instrument The instrument will self recover and operate to all specifications when the source of ambient EM field and noise are removed or when the instrument is protected from the ambient EM field or when the instrument cabling is shielded from the ambient EM noise U1401B User s and Service Guide Regulatory Markings ICES NMB 001 The CE mark is a registered trademark of the European Community This CE mark shows that the product complies with all the relevant European Legal Directives ICES NMB 001 indicates that this ISM device complies with the Canadian ICES 001 Cet appareil ISM est confomre a la norme NMB 001 du Canada The CSA mark is a registered trademark of the Canadian Standards Association U1401B User s and Service Guide The C tick mark is a registered trademark of the Spectrum Management Agency 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 dis
40. V 00 000 V p 00 000 mA If R1 R2 1K ouT 06 000 v 06 000 mA 12 000 V if it Figure 5 14 Voltage to current converter Integrator square wave to triangle wave conversion The integrating circuit in Figure 5 15 on page 112 produces an output voltage that is proportional to the integral of the input voltage One of the many uses of this integrator is to convert a square wave into a triangle wave 1 Turn the rotary switch to the WV JUUL position 2 Connect the red and black alligator leads to the positive and negative output terminals respectively 3 Connect the operational amplifier as shown in Figure 5 15 on page 112 U1401B User s and Service Guide 111 5 5 Application Examples 4 Use a DC power supply with 15 V and 15 V outputs to power the operational amplifier 5 Use an oscilloscope to monitor the output waveform 6 Set the square wave duty cycle to 50 00 and its amplitude to 5 V 7 Output the square wave 8 Select a different frequency and vary the duty cycle to further understand the characteristics of the integrator 7 ao yor Re Vi t dt V R O sss E Vo lt C ni gt OUTPUT 7 15V JUUL O O N t Vp 50 00 7 Oscilloscope Figure 5 15 Square wave to triangular wave conversion 112 U1401B User s and Service Guide Application Examples 5 2 Wire Transmitter Verification U1401B User s and Service Guide You can use the following method to verify th
41. accept any commands from the host The annunciator flashes during the Print operation Press W Press A Figure 4 7 Setting the print mode for remote control 76 U1401B User s and Service Guide Changing the Default Settings 4 Setting the echo mode Setting this feature on enables the return of characters to a PC in remote communication which is useful when developing PC programs with SCPI commands e This mode is for internal use by Keysight Technologies only e During normal operation it is recommended that you disable this function Press W rr LLU Press A z Lint Press A LLL Figure 4 8 Setting the echo mode for remote control U1401B User s and Service Guide 77 4 Changing the Default Settings Setting the data bit The number of data bits data width for remote communication with a PC can be set to either 8 bits or 7 bits There is only one stop bit which cannot be changed Hb E dH L j Hh Press A ib E AAL CL LO OLI ILI Press W Press A Figure 4 9 Setting the data bit for remote control 78 U1401B User s and Service Guide Changing the Default Settings 4 Setting the parity check The parity check for remote communication with a PC can be set to either none even or odd Press W OO Lo IOL Press A odd OO Lo rire Press A En a Press A Figure 4 10 Setting the parity check for remote control U1401B User s and Service Gu
42. and w to adjust the value of the selected digit The amplitude can be set to any value within the selected output range 1 5 V or 15 V for constant voltage output 25 mA for constant current output e For time interval adjustment press lt and gt to select the digit to be adjusted and then press A and v to adjust the value of the selected digit The time interval can be set within the range of 0O to 99 seconds e Press gt for more than one second to directly reset the time interval and amplitude of the present step to Zero U1401B User s and Service Guide 35 2 Calibrator Output Operations 2 Press OUTPUT to save the settings Output amplitude 16 memory 0 to 99 sec locations time interval Figure 2 3 Defining the autoscan output Autoramp output To set the autoramp output 1 Turn the rotary switch to any one of the A or positions 2 Press SHIFT to access the shifted operations of the keypad The annunciator will appear on the display 3 Follow one of the instructions below e For voltage output press MODE to cycle through 1 5 V 15 V 1 5 V 15 V 1 5 V and 15 V output modes Select either of the two autoramp output modes depending on the voltage range you require e For current output press MODE to cycle through 25 mA 25 mA and 25 mA output modes Select the output mode 36 U1401B User s and Service Guide Calibrator Output Operations 2 Table 2 2 Default settings f
43. ata hold or refresh hold mode 70 Figure 4 3 Setting the temperature unit 72 XIX Figures XX Figure 4 4 Setting the beeper frequency 73 Figure 4 5 Setting the minimum frequency 74 Figure 4 6 Setting the percentage scale readout 75 Figure 4 7 Setting the print mode for remote control 76 Figure 4 8 Setting the echo mode for remote control 77 Figure 4 9 Setting the data bit for remote control 78 Figure 4 10 Setting the parity check for remote control 79 Figure 4 11 Setting the baud rate for remote control 80 Figure 4 12 Setting the display backlight timer 81 Figure 4 13 Setting the auto power off mode 83 Figure 5 1 Testing a 4 mA to 20 mA current loop with the source mode 87 Figure 5 2 mA output simulation 89 Figure 5 3 Use the yellow test lead to perform the 2 wire transmitter simulation 91 Figure 5 4 Pressure transducer measurement 93 Figure 5 5 Zener diode test 95 Figure 5 6 Diode test 97 Figure 5 7 TO0 92 Transistor 98 Figure 5 8 TO 3 Transistor 101 Figure 5 9 Determining transistor h 103 Figure 5 10 TO 92 JFET 104 Figure 5 11 N Channel JFET 106 Figure 5 12 P Channel JFET 10 7 Figure 5 13 Current to voltage converter 109 Figure 5 14 Voltage to current converter 111 Figure 5 15 Square wave to triangular wave conversion 112 Figure 5 16 Verifying a two wire transmitter 114 Figure 5 17 Verifying a frequency transmitter 116 Figure 6 1 Battery replacement 120 Figure 6 2 Recharging the bat
44. ates the charging process indication GREEN Fully charged YELLOW Charging U1401B User s and Service Guide Getting Started 1 The front panel at a glance Multi Function Calibrator Meter ED ne OMAN Loves el ACDC GcAN MA our sce GD UE HABA saves AUTO gt t DH MAX AVG MIN ACDC SLIL FE Display SEU MODE lt How COD wo anc ux puar Se MAX MIN AUTO OUTPUT Keypad Rotary switch CAT II 150V OUTPUT Terminals Figure 1 2 The front panel U1401B User s and Service Guide 1 Getting Started The rotary switch at a glance Before powering on the U1401A set the slide switch to M or M S position To switch on the U1401A turn the rotary switch to the desired function The input and output functions are selected together The outer circle indicates the output source function while the inner circle indicates the input meter function 3 4 5 6 OFF G 1 O JUUL NI CE AC DC CAT II 150V Figure 1 3 The rotary switch Table 1 3 Rotary switch positions and their corresponding functions Description Function pon O ooa C DC AC or AC DC voltage e Square wave output measurements e Constant current 25 mA e Constant voltage 1 5 V 15 V DC AC or AC DC mV Constant voltage 1 5 V 15 V measurements or temperature measurement 8 U1401B User s and Service Guide Getting Started 1 Table 1 3 Rotary switch positions and their corresponding function
45. ating procedure practice or the like that if not correctly per formed or adhered to could result in personal injury or death Do not proceed beyond a WARNING notice until the indicated condi tions are fully understood and met U1401B User s and Service Guide Safety Symbols The following symbols on the instrument and in the documentation indicate precautions which must be taken to maintain safe operation of the instrument Direct current DC Alternating current AC Both direct and alternating current Three phase alternating current Earth ground terminal Protective conductor terminal Frame or chassis terminal y Equipotentiality Equipment protected throughout by double insulation or reinforced insulation g U1401B User s and Service Guide Off supply On supply Caution risk of electric shock Caution risk of danger refer to this manual for specific Warning or Caution information Caution hot surface Out position of a bistable push control In position of a bistable push control Category II 150 V overvoltage protection General Safety Information IV The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Keysight Technol
46. ator will appear on the display 2 Press A or w to adjust the pulse width The amplitude can be set as 5 V 5 V 12 V or 12 V To adjust the amplitude 1 Press MODE to select amplitude adjustment The Level annunciator will appear on the display 2 Press A or w to select the amplitude U1401B User s and Service Guide Calibrator Output Operations 2 mrmi me LILI AUTO ae q a ay OOOI OIL He Press MODE nnn aa Mert Lt_Ibi yf Press Press i MODE MODE JUUL 3 our nnn SP Mas m sec AUTO MnO LOT Press l MODE AUTO M 1 L IL if Figure 2 7 Parameter selection for square wave output U1401B User s and Service Guide 43 2 44 Calibrator Output Operations THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK U1401B User s and Service Guide KEYSIGHT TECHNOLOGIES U1401B Handheld Multi Function Calibrator Meter User s and Service Guide 3 Making Measurements Measuring Voltage 46 Measuring DC voltage 46 Measuring AC voltage 48 Measuring Current 49 DC mA measurement 49 Percentage scale of DC mA measurement 50 Measuring Temperature 51 Measuring Resistance and Testing Continuity 54 Alerts and Warning During Measurement 56 Overload alert for voltage measurement 56 Math Operations 5 Dynamic recording 5 Relative zero 60 Triggering Operations 61 Data hold manual trigger 61 Refresh hold auto trigger 62 1 ms peak hold 63 This chapter contains
47. aximum output Range Resolution Accuracy current 2 Constant 1 500 V 0 03 3 25 mA or below 1 1 The maximum input voltage protection is 30 VDC 2 Loading coefficient 0 012 mV mA for 1 5 V output Table 8 17 Constant current CC output specifications Maximum output Range Resolution Accuracy voltage 2 Constant 25 000 mA 1 uA 0 03 5 12 V or below l current CC 1 The maximum input voltage protection is 30 VDC 2 Loading coefficient 1 uA V the minimum output voltage is based on 20 mA into a 600 Q load 3 If the current loop has a 24 V power a minimum output voltage of 24 V is achievable with a 20 mA current in a 1200 Q load This is only applicable for the simulation mode for mA output refer to Simulation Mode for mA Output on page 88 for more information U1401B User s and Service Guide 159 8 Specifications Square wave output The maximum input voltage protection is 30 VDC Table 8 18 Square wave output specifications owe me in eee Frequency Hz 0 5 1 2 5 10 15 20 25 30 40 50 60 75 0 01 0 005 1 80 100 120 150 200 240 300 400 480 600 800 1200 1600 2400 4800 Duty Cycle 0 39 to 99 60 0 390625 0 01 0 2 2 Pulse Width ms 1 Frequency Range 256 0 01 0 3 ms Amplitude V 5V 12V 0 1V 2 0 2V PIV 12 V 2 0 4V M The positive or negative pulse width must be greater than 50 us for adjusting the duty cycle or pulse width
48. card this electrical or electronic product in domestic household waste Vil Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC 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 Product Category With reference to the equipment types in the WEEE directive Annex 1 this instrument is classified 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 Technologies or visit www keysight com environment product for more information Keysight Technologies through Rechargeable Battery Recycling Corporation RBRC offers free and convenient battery recycling options in the U S and Canada Contact RBRC at 877 2 RECYCLE 877 273 2925 or online at http www call2recycle org for the nearest recycling location Vill U1401B User s and Service Guide In This Guide U1401B User s and Service Guide Getting Started This chapter contains a brief description of the U1401B Handheld Multi Function Calibrator Meter front panel rotary switch keypad display terminals and rear panel Calibrator Output Operations This chapters contains detailed information on how to generate signals usi
49. ciator and the present instantaneous reading e The instrument will constantly calculate and update the average measured value in the memory e Whenever a new maximum or minimum value is recorded the instrument will beep once 2 Press MAX MIN to cycle through the maximum minimum average and present readings The MAX MIN AVG or MAX AVG MIN annunciator will appear to indicate which value is being displayed See Figure 3 7 on page 59 e While you are viewing the recorded maximum minimum or average readings the instrument will continue to measure or calculate and update these values 3 Press MAX MIN for more than 1 second to exit the dynamic recording mode U1401B User s and Service Guide 57 3 Making Measurements e If an overload condition occurs the averaging function will stop The recorded average value becomes OL overload e In dynamic recording the auto power off feature will be disabled This is indicated by the absence of the QOFF annunciator on the display e When performing dynamic recording in autorange the maximum minimum and average readings may be recorded in different ranges e The recording interval in manual range is approximately 0 067 seconds e The average value is the true average of all measured values taken since the recording mode was activated 58 U1401B User s and Service Guide U1401B User s and Service Guide Making Measurements 3 HT Hr sey LOL ILILILS sev LUMILILILE
50. d equipment requirements U1401B User s and Service Guide 131 7 Performance Tests and Calibration Performance Verification Tests Self verification To perform a self verification on the output voltage level of the instrument 1 Turn the rotary switch to the V position 2 Short the input test leads for voltage measurement then press momentarily to zero the residual of thermal effect until the measurement value is stable Connect the positive ends of input and output together 3 4 Connect the negative ends of input and output together 5 Set output value to 4 5000 V 6 Observe the measurement value in the primary display Refer to Table 7 2 for functions that can be self verified Table 7 2 Functions that can be self verified Rotary switch position Measuring value input 4 5000 V DC 4 5000 V 25 0000 mA DC 25 0000 mA Table 7 2 is for reference only Refer to Chapter 8 Specifications on page 147 for the detailed specifications 132 U1401B User s and Service Guide Performance Tests and Calibration 7 Input performance verification To verify the input functions of the Handheld Multi Function Calibrator Meter perform the verification tests listed in Table 7 3 Refer to Table 7 1 on page 131 for the recommended test equipment for verifying each function Table 7 3 Input performance verification tests Error from nominal 1 Test Function Connection to 5520A 5520A output year Turn the ro
51. d hhTechLib to download the software 3 Attach the optic side of the cable to the communication port on the instrument Make sure that the text side is facing upwards See Figure 1 10 on page 25 4 Plug the other end of the USB cable terminal into the USB port of your personal computer 5 Use the data transfer software to retrieve the data that you need 6 Press the flaps to remove the cable from the communication port of the instrument See Figure 1 11 on page 25 7 It is not recommended to remove the connector cover of the IR USB cable But sometime while pressing the flap to unplug the cable the connector cover may come off accidentally as shown in Figure 1 11 on page 25 To 23 1 24 Getting Started reattach the cover simply slip the cover over the connector Make sure that the text on the cover is on the same side as the text on the top case of the connector You will hear a click when the cover snaps properly into its place Figure 1 9 IR USB cable U1401B User s and Service Guide Getting Started 1 Figure 1 10 IR USB cable connection Disconnect Connect Press this flap while moving in the direction indicated by the arrows to connect or disconnect the IR USB cable Figure 1 11 R USB cable U1401B User s and Service Guide 25 1 26 Getting Started THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK U1401B User s and Service Guide KEYSIGHT TECHNOLOGIES U1401B Handheld Multi Functi
52. dde gg E TIT o LIC oor DALAL G a How T anca Buan SHIFT MAXMIN t mV AUTO OUTPUT O o ML CE AC DC CAT II 150V OUTPUT 25mA MAX FUSED Figure 3 4 Surface temperature measurement U1401B User s and Service Guide 53 3 Making Measurements Measuring Resistance and Testing Continuity CAUTION 54 Disconnect circuit power and discharge all high voltage capacitors before measuring resistance to prevent possible damage to the instrument or the device under test To measure resistance follow these steps 1 Turn the rotary switch to the 1 position 2 Connect the red and black test leads to the positive and negative input terminals respectively 3 Probe the resistor or shunt leads and read the display To perform continuity test press to toggle the audible continuity function ON or OFF For the 500 Q range the instrument will beep if the resistance value falls below 10 Q For other ranges the instrument will beep if the resistance falls below the typical values indicated in the table below Table 3 1 Measurement ranges for audible continuity Measurement range Resistance threshold 5 0000 kQ 100 Q 50 000 kQ 1kQ 500 00 kQ 10 kQ 5 0000 MQ 100 kQ U1401B User s and Service Guide Making Measurements aig U1401B Multi Function Calibrator Meter MODE lt gt A v HOLD aNuLt RANGE mv SHIFT MAX MIN nan AC DC
53. e M input only position you should do this to conserve battery power if you do not intend to use any of the output functions U1401B User s and Service Guide Calibrator Output Operations 2 Constant Voltage Operation The U1401B can generate a constant voltage output in two different ranges namely 1 5 V and 15 V To select the constant voltage output function 1 Turn the rotary switch to any one of the constant voltage output positions 2 Press SHIFT to access the shifted operations of the keypad The annunciator will appear on the display 3 Press MODE to cycle through 1 5 V 15 V 1 5 V 15 V 1 5 V and 15 V output modes Select either 1 5 V or 15 V for constant output or steady output as opposed to autoscan or autoramp outputs which will be discussed under Memory Generation on page 31 depending on the voltage range you require e Unlike the autoscan and autoramp modes there is no special annunciator on the display to indicate constant voltage CV operation 4 With the instrument in standby mode you should see the annunciator on the display if not press OUTPUT you can adjust the amplitude of the output by pressing lt and to select the digit to be adjusted and then pressing A and w to adjust the value of the selected digit 5 Press OUTPUT to start the source output The annunciator will appear on the display U1401B User s and Service Guide 29 2 Calibrator Output Operations
54. e interval for Autoscan Adjustable resolutions and start for linear Ramp output 1 ms peak hold to catch inrush voltage and current easily Temperature measurement with selectable 0 C compensation Frequency duty cycle and pulse width measurements Dynamic recording for minimum maximum and average readings Data hold with manual or autotrigger and relative mode Diode and audible continuity tests Bidirectional optic computer interface with SCPI commands Resistance measurement up to 50 MQ Safe precise and fast closed case calibration 50 000 count precision true rms digital meter designed to meet IEC 61010 1 CAT II 150V standard U1401B User s and Service Guide Getting Started Standard Purchase Items U1401B User s and Service Guide Verify that you have received the following items with your U1401B Handheld Multi Function Calibrator Meter e Protective holster e Rechargeable battery pack 1 2 V NiMH AA x 8 e Power cord and AC power adapter e Silicone test leads e 19 mm probes e Alligator clips e Yellow test lead for mA simulation e Certificate of calibration e Printed Quick Start Guide If anything is missing contact your nearest Keysight Technologies Sales and Service Office 1 1 Getting Started List of Accessories Table 1 1 List of accessories Standard Protective holster Rechargeable battery pack 1 2V NiMH AA x 8 AC Power Adapter for Handheld Multi Function Calibrator Meter Powe
55. e it waits for a stable new reading the DH annunciator will flash e The DH annunciator will stop flashing once a stable new reading is available and then the new value will be updated to the display The instrument will beep once as a notification 3 Press to exit this mode For voltage and current measurements the held value will not be updated if the variation of the reading is below 500 counts For resistance and diode measurements the held value will not be updated if the reading is OL or open For all measurements the held value will not be updated if the reading cannot reach a stable state U1401B User s and Service Guide Making Measurements 3 1 ms peak hold U1401B User s and Service Guide This function allows the measurement of peak voltage for analysis of components such as power distribution transformers and power factor correction capacitors The peak voltage obtained can be used to determine the crest factor Crest factor Peak value True rms value To measure the half cycle peak voltage 1 Press for more than one second to toggle 1 ms peak hold mode on or off 2 Press to show the peak or peak value after activating the peak mode The DH MAX annunciator indicates the peak value while the DH MIN annunciator indicates the peak value See Figure 3 10 on page 64 3 If the reading is OL press to change the measurement range and restart the peak value measurement 4 While the peak hold mode is on y
56. e operation of a 2 wire transmitter The method takes advantage of the ability of this instrument to simultaneously source voltage and measure current 1 Turn the rotary switch to mA position 2 Connect the red alligator lead between the positive output terminal of the instrument and the positive output terminal of the two wire transmitter Refer to Figure 5 16 on page 114 3 Connect a shorting plug between the negative output terminal and negative input terminal of the instrument 4 Connect the black alligator lead between the positive input terminal of the instrument and the negative output terminal of the two wire transmitter 5 The supply can be set to any voltage up to 15 V Press OUTPUT to output the excitation voltage 7 The instrument display will indicate a transmitter output current if an input signal is present 113 5 Application Examples 3E Agilent ee io l alibrator Meter t GOD v TWO WIRE AUTO TRANSMITTER S oor LALL FT MAXMIN MODE lt gt A v Gus SHI mV AUTO OUTPUT Me Ce CAT II 150V OUTPUT Figure 5 16 Verifying a two wire transmitter 114 U1401B User s and Service Guide Application Examples 5 Frequency Transmitter Verification U1401B User s and Service Guide For some frequency transmitters you can use the square wave output as a source simulator and measure the current from the transmitter output Turn the rotary switch to the ma JUUL posit
57. eeds this preset variation count the refresh hold mode will be ready to trigger and update a new value U1401B User s and Service Guide 69 4 Changing the Default Settings Press W OFF D DAILIL LI Press A A Yv Press A 1 Vv D DILL Li Press A v A rir LIL Press A L IOL LI Figure 4 2 Setting the data hold or refresh hold mode 70 U1401B User s and Service Guide Changing the Default Settings 4 Setting the temperature unit Four combinations of temperature unit display are available e Celsius only C on the primary display e Celsius C on the primary display and Fahrenheit F on the secondary display for dual display setting e Fahrenheit only F on the primary display e Fahrenheit F on the primary display and Celsius C on the secondary display for dual display setting U1401B User s and Service Guide 71 4 Changing the Default Settings d r Press W DOL SHIFT Press SHIFT for more than one im i lt p D aD second to enable temperature unit L L menu item P g a d u LEU LLU Press A LeU Press A _Cr d FL LEU Press A Figure 4 3 Setting the temperature unit 72 U1401B User s and Service Guide Changing the Default Settings 4 Setting the beeper frequency The beeper frequency can be set to 4800 Hz 2400 Hz 1200 Hz or 600 Hz OFF means the beeper is disabled YOR Press W LELLI LILLJ Press A Yv LFF
58. ficant digit at 23 C 5 C with relative humidity less than 80 R H and warmed up for at least five minutes Without warming up an additional five counts of LSD will have to be added to the accuracy DC specifications Table 8 1 DC mV voltage specifications DC mV voltage 0 05 50 2 250 Vrms 500 mV 10 uV 0 03 5 1 Input impedance 10 MQ nominal for the range of 5 V and above and 1 GQ nominal for the 50 500 mV range 2 The accuracy could be improved to 0 05 5 Always use the relative function to offset the thermal effect short the test leads before measuring the signal U1401B User s and Service Guide 151 8 Specifications Table 8 2 DC current specifications DC current 50 mA l 0 03 5 0 06 V 1 Q 250 V 630 mA 500 mA 1 10 uA 0 6 V 1 Q Quick acting fuse 1 Always use the relative function to offset the thermal effect before measuring the signal If this function is not used the accuracy will be 0 03 25 The thermal effect could be present in the following conditions e Constant current constant voltage or square wave output e Wrong operation where the resistance diode or mV measurement function is used to measure high voltage signals exceeding 250 V After battery charging has completed After measuring a current greater than 50 mA AC specifications WARNING Exceeding the crest factor limit may result in an incorrect or a lower reading Do not exceed the crest
59. gles between mV and temperature tests subtracted from subsequent measurements 4 RANGE RANGE Changes measurement range measurement range Changes measurement range Sets to autorange to Sets to autorange DUAL Cycles through different combinations of primary and secondary displays Hz Selects frequency Hz duty cycle or pulse Exits selection width ms on the primary display 10 U1401B User s and Service Guide Getting Started 1 Table 1 4 Keypad functions continued Function when pressed for less than one Function when pressed for more than one second second Enables and disables the shifted functions of Toggles backlight ON OFF the other keys Selects output modes for constant Enters the adjustment mode for autoscan and voltage constant current autoscan and autoramp outputs autoramp Selects frequency Hz duty cycle pulse width ms and level adjustments for square wave output Selects a digit or the polarity to be adjusted The selected digit polarity will be flashing on the secondary display Adjusts a digit or the polarity Press to adjust the selected digit or toggle the output polarity OUTPUT Toggles the output state on and off indicates that the signal is being generated and indicates that the output has been disabled 1 When the HOLD key is pressed for more then one second its function depends on the present state of the instrument If the instrument is presently in the data hold
60. h the Hz key 20 Display selection with the DUAL key 22 Remote Communication 23 Calibrator Output Operations Enabling and Disabling the Output 28 Constant Voltage Operation 29 Constant Current Operation 30 Memory Generation 31 Autoscan output 31 Autoramp output 36 Square Wave Output 41 Making Measurements Measuring Voltage 46 Xl Contents XII Measuring DC voltage 46 Measuring AC voltage 48 Measuring Current 49 DC mA measurement 49 Percentage scale of DC mA measurement 50 Measuring Temperature 51 Measuring Resistance and Testing Continuity 54 Alerts and Warning During Measurement 56 Overload alert for voltage measurement 56 Math Operations 57 Dynamic recording 5 Relative zero 60 Triggering Operations 61 Data hold manual trigger 61 Refresh hold auto trigger 62 1 ms peak hold 63 Changing the Default Settings Entering the Setup Mode 66 Available Setting Options 68 Setting the data hold refresh hold mode 69 Setting the temperature unit 71 Setting the beeper frequency 73 Setting the minimum measurable frequency 74 Setting the percentage scale readout 75 Setting the print mode 76 Setting the echo mode 77 Setting the data bit 78 Setting the parity check 79 Setting the baudrate 80 U1401B User s and Service Guide 5 U1401B User s and Service Guide Contents Setting the display backlight timer 81 Setting the power saving mode 82 Application Examples Source Mode for mA Output 86
61. hich are not covered in this manual should only be performed by qualified personnel General maintenance Make sure that the terminal connections are correct for a particular measurement before making any measurement To avoid damaging the instrument do not exceed the rated input limit Besides the hazards mentioned above dirt or moisture in the terminals can also distort the readings The cleaning procedure is outlined below To avoid electrical shock or damage to the instrument prevent water from getting inside the case 1 Turn the instrument off and remove the test leads 2 Turn the instrument over and shake out any dirt that may have accumulated in the terminals 3 Wipe the case with a damp cloth and mild detergent do not use abrasives or solvents containing benzine benzene toluene xylene acetone or similar chemicals Also do not spray cleaner liquid directly onto the instrument because it may seep into the case and cause damage Wipe the contacts in each terminal with a clean swab moistened in alcohol 4 Make sure the instrument has dried completely before using it U1401B User s and Service Guide Maintenance Battery replacement CAUTION U1401B User s and Service Guide The batteries contain nickel metal hydride and must be recycled or disposed off properly Remove all test leads and external adapter before opening the case To avoid instruments being damage from battery leakage always remove dead
62. hing use or performance of this document or of any information contained herein Should Keysight and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms the warranty terms in the separate agreement shall control Technology Licenses The hardware and or software described in this document are furnished under a license and may be used or copied only in accor dance with the terms of such license Restricted Rights Legend U S Government Restricted Rights Soft ware and technical data rights granted to the federal government include only those rights customarily provided to end user cus tomers Keysight provides this customary commercial license in Software and techni cal data pursuant to FAR 12 211 Technical Data and 12 212 Computer Software and for the Department of Defense DFARS 252 227 7015 Technical Data Commercial Items and DFARS 227 7202 3 Rights in Commercial Computer Software or Com puter Software Documentation Safety Notices CAUTION A CAUTION notice denotes a haz ard It calls attention to an operat ing procedure practice or the like that if not correctly performed or adhered to could result in damage to the product or loss of important data Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met A WARNING notice denotes a hazard It calls attention to an oper
63. ide 79 4 Changing the Default Settings Setting the baud rate The baud rate used in the remote communication with a PC can be set as 2400 Hz 4800 Hz 9600 Hz or 19200 Hz Press W Press A Press A Figure 4 11 Setting the baud rate for remote control 80 U1401B User s and Service Guide Changing the Default Settings 4 Setting the display backlight timer The display backlight timer can be set from 1 to 99 seconds The backlight turns off automatically after the set period OFF means the backlight will not turn off automatically Press W LI L LIL th Press A L LIL th Figure 4 12 Setting the display backlight timer U1401B User s and Service Guide 1 4 Changing the Default Settings Setting the power saving mode To enable auto power off set this timer to any value from 1 to 99 minutes This feature is incorporated for power saving The instrument will automatically turn off after the specified period of time if none of the following happens within that period e A key on the keypad is pressed e A measurement function is changed e The dynamic recording mode is activated e The 1 ms peak hold mode is activated e The auto power off feature has been disabled in the setup mode e The output has been enabled the annunciator is displayed To reactivate the instrument after auto power off turn the rotary switch to the OFF position and then turn it on again If the instrument is to be
64. ion Press MODE to cycle through duty cycle pulse width output level and frequency adjustments Set the output frequency to 150 Hz and duty cycle to 50 4 Connect the probe leads between the input terminals of the U1401B and the output terminals of the transducer Connect the alligator leads between the output terminals of the U1401B and the input terminals of the transducer Make sure the polarity is correct Press OUTPUT to output the signal Read the display Check the measured current to determine whether the frequency is consistent with the transducer specifications Change the square wave frequency and monitor the measured current on the display 115 5 Application Examples Multi Function Calibrator Meter uu O QHD AUTO TO bt ULILIL MODE lt gt A v HOLD NULL RANGE DUAL mV SHIFT MAXMIN mV AUTO OUTPUT 1 y mn AC DC TRUE RMS CAT II 150V OUTPUT Figure 5 17 Verifying a frequency transmitter 116 U1401B User s and Service Guide U1401B Handheld Multi Function Calibrator Meter User s and Service Guide 6 Maintenance Maintenance 118 General maintenance 118 Battery replacement 119 Recharging the batteries 121 Fuse replacement 122 Troubleshooting 124 Replacement parts 126 This chapter will help you troubleshoot the U1401B for faults KEYSIGHT TECHNOLOGIES 6 Maintenance Maintenance 118 CAUTION Repairs or services w
65. ircuit power and discharge all high voltage capacitors before testing the diodes To perform zener diode test 1 2 Turn the rotary switch to the CV 2 position Connect the red alligator lead between the positive output terminal and the positive anode side of the zener diode See Figure 5 5 on page 95 Connect the black alligator lead between the negative output terminal and the negative cathode side of the zener diode Connect the red and black probe leads to the input terminals Output a constant current of 1 mA then measure the forward voltage of the zener diode Output a constant current of 1 mA then measure the breakdown voltage of the zener diode U1401B User s and Service Guide U1401B User s and Service Guide Application Examples ii 36 Agilent U1401B Multi Function Calibrator Meter F gt A v Gu DUAL mV AUTO OUTPUT MODE lt SHIFT MAX MIN CAT Il 150V OUTPUT Figure 5 5 Zener diode test 5 95 5 Application Examples Diode Test A good diode allows current to flow in one direction only To test a diode turn the circuit power off remove the diode from the circuit and proceed as follows 1 Turn the rotary switch to the gt F GA position 2 Connect the red and black probe leads to the positive and negative input terminals respectively 3 Probe the positive anode side of the diode with the red lead and the negative cathode side with
66. is instrument provides steady stepped and ramped current output for testing 0 mA to 20 mA and 4 mA to 20 mA current loops The source mode can be used to supply current to a passive circuit such as a current loop without loop supply 1 2 Turn the rotary switch to the C mA A position Plug the red and black banana plugs of the alligator leads into the positive and negative output terminals respectively Connect the red and black alligator clips to the current loop Make sure that the polarity is correct Press SHIFT to access the shifted operations of the keypad The annunciator will appear on the display Set the output level at 08 000 mA to get a 25 scale readout for 4 mA to 20 mA Press OUTPUT to start the source output The annunciator will appear on the display You can use autoscan to test the loop with varying levels of current output Refer to Chapter 2 Autoscan output on page 31 for more information on the memory default values U1401B User s and Service Guide U1401B User s and Service Guide n Calibrator Met om m 4 pnn LILILI mA AUTO DC rut LILILILiLe v Ws 2S OUTPUT SHIFT MAXMIN mV AUTO CAT II 150V DO JU Application Examples 5 Figure 5 1 Testing a 4 mA to 20 mA current loop with the source mode 87 5 Application Examples Simulation Mode for mA Output CAUTION Always use the supplied special yellow test lead to perform m
67. les Do not apply an external voltage exceeding 30 V across the output terminals of the instrument oe Agi U1401B oye Agilent Multi Function Calibrator Meter DC Power Supply lt gt A Go mV SHIFT MAX MIN CAT II 150V OUTPUT Yellow Figure 5 2 mA output simulation 5 5 Application Examples Simulating a 2 wire transmitter on a current loop The special yellow test lead supplied with the U1401B can also be used for simulating a 2 wire transmitter This lead is used in place of the red lead which is used in most other applications It protects the instrument from high loop voltages and it also has the advantage of using the same two output terminals for all applications 1 5 Turn the rotary switch to any one of the C mA A or zy A positions Connect the special yellow test lead between the positive output terminal of the instrument and the input terminal of the measurement device on the current loop Refer to Figure 5 3 on page 91 Connect the black alligator lead between the negative output terminal of the instrument and the current loop excitation source Make sure the polarity is correct Set the current level between 0 mA and 20 mA Do not set a negative current output value Press OUTPUT to output the test current This connection can be used for any loop voltage from 12 V to 30 V Do not apply an external voltage exceeding 30 V across the output C
68. linear loads Press to enter the frequency measurement mode for current or voltage measurements The voltage or current values will be displayed on the secondary display and the frequency values on the primary display Press this key again to step through frequency Hz duty cycle or pulse width ms This allows simultaneous monitoring of real time voltage or current with frequency duty cycle or pulse width After you press and hold for more than one second the primary display will revert to voltage or current measurement values Table 1 9 Measurement functions and corresponding display selection with the Hz key AC voltage Frequency Hz AC voltage Duty cycle Pulse width ms DC voltage Frequency Hz DC voltage Duty cycle Pulse width ms AC DC voltage Frequency Hz AC DC voltage Duty cycle Pulse width ms AC current Frequency Hz AC current Duty cycle Pulse width ms 20 U1401B User s and Service Guide Getting Started 1 Table 1 9 Measurement functions and corresponding display selection with the Hz key continued DC current Frequency Hz DC current Duty cycle Pulse width ms AC DC current Frequency Hz AC DC current Duty cycle Pulse width ms Current in percentage scale Frequency Hz Current in percentage scale 0 mA to 20 mA or 4 mA to 20 mA 0 mA to 20 mA or 4 mA to 20 mA Duty cycle Pulse width ms U1401B User s and Service Guide 21 1 Getting S
69. lue this is I For PNP type BJT 1 Turn the rotary switch to the C mA A position Connect the base to the positive output terminal Connect the collector to the negative output terminal and the positive terminal of a DC power supply which supplies the required Vpp Connect the emitter to the negative input terminal Connect the negative terminal of the DC power supply to the positive input terminal through a resistor Output a constant current of 0 500 mA this is Ip Read the measured current value this is Ic The transistor hfe is calculated as the ratio of I over Ip U1401B User s and Service Guide hfe Ic Ip 152 hfe Ic lg 300 lg Current source lc Meter reading nis i U1401B SPS Agi U1401B ays Agilent Multi Function Calibrator Meter ct Agilent Multi Function Calibrator Meter lt gt A ou m SHIFT MAXMIN i mV AUTO JUUL fw AC DC CAT II 150V TRUE RMS OUTPU INPUT A A Figure 5 9 Determining transistor hje U1401B User s and Service Guide 2SA1015 Application Examples Vop 103 5 5 Application Examples Junction Field Effect Transistor JFET Switch Test 104 A JFET typically has three terminals namely drain D gate G and source S There are two types of JFET depending on the channel type p channel and n channel It is recommended that you obtain the specific data sheet from the manufacturers You can also use the U140
70. mV SHIFT MAX MIN AUTO OUTPUT AC DC CAT II 150V TRUE RMS CE OUTPUT INPUT WN N O OOQ Er 25mA MAX FUSED Figure 3 2 AC voltage measurement 48 U1401B User s and Service Guide Making Measurements 3 Measuring Current DC mA measurement 1 Turn the rotary switch to l mA 2 Press to select DC current measurement Connect the red and black test leads to the positive and negative input terminals respectively 4 Probe the test points in series with the circuit and read the display see Figure 3 3 C DC S IN CE AC CAT II 150V TRUE RM OUTPUT INPUT T on A MAX Figure 3 3 DC current mA measurement U1401B User s and Service Guide 49 3 50 Making Measurements Percentage scale of DC mA measurement The percentage scale for 4 mA to 20 mA or 0 mA to 20 mA is calculated based on the measured DC mA value 1 Select the required range 4 mA to 20 mA or 0 mA to 20 mA in the Setup mode refer to Chapter 4 Setting the percentage scale readout Turn the rotary switch to Al mA Press to select percentage scale display for DC mA measurement Connect the red and black test leads to the positive and negative input terminals respectively Probe the test points in series with the circuit and read the display The inset display in Figure 3 3 shows the percentage scale reading representing 20 mA in the range of 4 mA to 20 mA U1401B User s and Service G
71. mode pressing this key for more than one second will exit the data hold mode if the instrument is not in the data hold mode pressing this key for more than one second will enter or exit the dynamic recording mode 2 Only applicable when the instrument is in the dynamic recording mode 3 Shifted functions U1401B User s and Service Guide 11 1 Getting Started Shifted functions Every key except the SHIFT key itself has a shifted function To access these shifted functions you must first press SHIFT After pressing SHIFT the shifted functions will remain enabled the LCD display will indicate GHIFT until the SHIFT key is pressed again Throughout this manual instructions that involve shifted functions will be given without explicit mention of the SHIFT key Refer to Table 1 5 on page 12 for a list of such instructions and what you will need to do Table 1 5 Instructions involving shifted functions Instruction Required actions Press MODE Press SHIFT then press Press lt Press SHIFT then press HoLD Press gt Press SHIFT then press Press A Press SHIFT then press RANGE Press W Press SHIFT then press Press OUTPUT Press SHIFT l l then press 1 If the shifted functions are not already enabled 12 U1401B User s and Service Guide Getting Started 1 The display at a glance To view the full display with all segments illuminated press while turning the rotary switch fr
72. n Vgg is a negative value then it is an n channel JFET On the other hand if Rpg increases when Vag is a positive value then it is a p channel JFET 105 5 Application Examples Ros 059 00 P et TO INPUT Figure 5 11 N Channel JFET 106 The cutoff voltage of an n channel JFET To determine the cutoff voltage of an n channel JFET 1 2 3 Connect the red input probe lead to the drain Connect the black input probe lead to the source Connect the red output alligator lead to the gate terminal through a 100 kQ resistor and connect the black output alligator lead to the black input probe lead Gradually decrease the voltage output from 00 000 V to 15 000 V The Rpg value will increase correspondingly Figure 5 11 on page 106 Observe at what point the resistance reading becomes OL the voltage bias level at that point would be the cutoff voltage for the n channel JFET TO 92 5 out 00 000 v OUT 15 000 v A T m m aa G TO OUTPUT J113 eF ef U1401B User s and Service Guide Ros TO INPUT Figure 5 12 P Channel JFET U1401B User s and Service Guide Application Examples 5 The cutoff voltage of a p channel JFET To determine the cutoff voltage of a p channel JFET 1 2 3 Connect the red input probe lead to the drain Connect the black input probe lead to the source Connect the red output alligator lead to the gate terminal through a 100 kQ resistor
73. ng the U1401B Making Measurements This chapter contains the detailed information on how measurements are taken using the U1401B Changing the Default Settings This chapter describes how to change the default settings of the U1401B Application Examples This chapter describes some application examples for the U1401B Maintenance This chapter will help you troubleshoot the U1401B for faults Performance Tests and Calibration This chapter contains the performance test procedures and adjustment procedures to help you ensure that the U1401B is operating within its published specifications Specifications This chapter details the specifications of the U1401B Declaration of Conformity DoC The Declaration of Conformity DoC for this instrument is available on the Web site You can search the DoC by its product model or description http www keysight com go conformity If you are unable to search for the respective DoC please contact your local Keysight representative U1401B User s and Service Guide Contents U1401B User s and Service Guide Contents Getting Started Introducing the U1401B Handheld Multi Function Calibrator Meter 2 Standard Purchase Items 3 Listof Accessories 4 Product Overview 5 Slide switch 5 The front panel ata glance 7 The rotary switch at a glance 8 The keypad ataglance 9 The display ataglance 13 The terminals ata glance 17 The rear panel ata glance 19 Display selection wit
74. ns 154 Frequency specifications 155 1 ms peak hold specifications 157 Resistance specifications 157 Diode check and audible continuity specifications 158 Output Specifications 159 XIV U1401B User s and Service Guide Contents Constant voltage and constant current outputs 159 Square wave output 160 U1401B User s and Service Guide XV Contents THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK XVI U1401B User s and Service Guide Tables U1401B User s and Service Guide Tables Table 1 1 Listofaccessories 4 Table 1 2 Slide switch functions 5 Table 1 3 Rotary switch positions and their corresponding functions 8 Table 1 4 Keypad functions 10 Table 1 5 Instructions involving shifted functions 12 Table 1 6 Description of display annunciators 14 Table 1 7 Description of terminals 17 Table 1 8 Overload protection for the input terminals 18 Table 1 9 Measurement functions and corresponding display selection with the Hz key 20 Table 1 10 Measurement functions and corresponding display selection with the DUAL key 22 Table 2 1 Default settings for the autoscan output 33 Table 2 2 Default settings for the autoramp output 3 7 Table 2 3 Available frequencies 41 Table 3 1 Measurement ranges for audible continuity 54 Table 4 1 Setup options and default settings 68 Table 5 1 Typical pressure range and maximum output voltages of millivolt output pressure transducers 92 Table 5 2 Base terminal according to pr
75. ntroduces zero voltage drop into the measurement circuit and the effective input impedance of the circuit as measured directly at the inverting input terminal is zero 1 Turn the rotary switch to the V 2 position 2 Manually select the DC 50 V range for the voltage measurement 3 Connect the red and black probe leads to the positive and negative input terminals respectively U1401B User s and Service Guide Constant current output 00 000ma Figure 5 13 Current to voltage converter U1401B User s and Service Guide Application Examples 5 Connect the red and black alligator leads to the positive and negative output terminals respectively Connect the operational amplifier as shown in Figure 5 13 Use a DC power supply with 15 V and 15 V outputs to power the operational amplifier Feed a constant current of 00 000 mA into the operational amplifier and measure the offset voltage Vo Gradually increase the U1401B output current from 00 000 mA to 12 000 mA while monitoring the output voltage of the operational amplifier The V value will increase correspondingly from around 00 000 V to around 12 000 V The actual V is influenced by the tolerance of the feedback resistor and the offset of the operational amplifier DC voltage measurement 109 5 Application Examples Voltage to current converter In maintaining its differential input voltage at zero the operational amplifier shown in Figure 5 14 f
76. ny value within the selected output range 1 5 V or 15 V for constant voltage output 25 mA for constant current output e For adjusting the number of steps press lt and gt to select the digit to be adjusted then press A and w to adjust the value of the selected digit The number of steps can be set within the range of O to 999 steps e Press gt for more than one second to directly reset the time interval and amplitude of the present step to Zero 2 Press OUTPUT to save the settings 39 2 Calibrator Output Operations Start amplitude End amplitude C0 CT LOIL V sey ULI V L I Start position 1 999 steps 1 to 99 steps End position Figure 2 6 Defining the autoramp output 40 U1401B User s and Service Guide Square Wave Output U1401B User s and Service Guide Calibrator Output Operations 2 The square wave output can be used to generate a PWM pulse width modulation output or provide a synchronous clock source baud rate generator You can also use it to check and calibrate flow meter displays counters tachometers oscilloscopes frequency converters frequency transmitters and other frequency input devices The frequency amplitude duty cycle and pulse width of the Square wave output are all adjustable To select the square wave output function 1 Turn the rotary switch to the JUUL position 2 Press SHIFT to access the shifted operations of the keypad The annunciator
77. obe test 99 Table 5 3 Polarity and terminals if Pin 3 is the base 99 Table 5 4 Polarities and terminals if Pin2 isthe base 100 Table 5 5 Polarities and terminals if Pin 1 isthe base 100 Table 5 6 Polarity and terminals if Pin 2 isthe base 101 Table 5 7 Gate terminal according to probe test 105 Table 6 1 Fuse specifications 123 Table 6 2 Troubleshooting 125 Table 6 3 Replacement parts list 126 Table 7 1 Recommended test equipment 131 Table 7 2 Functions that can be self verified 132 XVII Tables XVIII Table 7 3 Table 7 4 Table 7 5 Table 7 6 Table 7 7 Table 8 1 Table 8 2 Table 8 3 Table 8 4 Table 8 5 Table 8 6 Table 8 7 Table 8 8 Table 8 9 Input performance verification tests 133 Output performance verification tests 137 Calibration tests 140 Output voltage calibration steps 145 Output current calibration steps 146 DC mV voltage specifications 151 DC current specifications 152 AC mV voltage specifications 152 AC current specifications 153 AC DC mV voltage specifications 153 AC DC current specifications 154 Temperature specifications 154 Frequency specifications 155 Frequency sensitivity and trigger level specifications for voltage measurement 155 Table 8 10 Duty cycle specifications 156 Table 8 11 Pulse width specifications 156 Table 8 12 Frequency sensitivity specifications for current measurement 156 Table 8 13 Peak hold specifications 157 Table 8 14 Resistance specificati
78. ogies assumes no liability for the customer s failure to comply with these requirements Do not exceed any of the measurement limits defined in the specifications to avoid instrument damage and the risk of electric shock e When working above DC 60 V AC 30 Vrms or AC 42 4 Vpeak exercise caution these ranges pose a shock hazard Do not measure more than the rated voltage as marked on the instrument between terminals or between terminal and earth ground e Double check the instrument operation by measuring a known voltage This instrument is designed for measurement under CAT II 150 V Avoid measuring power mains with voltage exceeding 150 V For current measurement turn off circuit power before connecting the instrument to the circuit Always place the instrument in series with the circuit e When connecting probes always connect the common test probe first When disconnecting probes always disconnect the live test probe first Detach test probes from the instrument before you open the battery cover Do not use the instrument with the battery cover or part of the cover removed or loose e Recharge or replace the battery as soon as the low battery indicator flashes on screen This is to avoid false readings which may lead to possible electric shock or personal injury Do not use the instrument if it is damaged Before you use the instrument inspect the casing Look for cracks or missing plastic Do not ope
79. om OFF to any non OFF position After you are done viewing the full display press any key to resume the normal function depending on the rotary switch position The instrument will then enter power save mode if the auto power off QOFF feature is enabled To wake the instrument up perform the following steps 1 Turn the rotary switch knob to the OFF position 2 Then turn the rotary switch to any position other than square wave output and press any key a EE ee ee S ee a E E E e E E E E E JUN GA H2 MS Level ACDC i JIK nr CA aat OOOO ymm mg sBy LOOO m AVSec AUTO t DH MAX AVG MIN ACDC cya no0002 rm LA ar eee hem hm mme omm ee i i cm by i rd e amn o mh i i emi sl ms e cn imc d aD is i msm i i amS hm oo mi mt mich mms o msm Figure 1 6 Full display U1401B User s and Service Guide 13 1 Getting Started Table 1 6 Description of display annunciators Remote control Gao Scan output 6CAN a s oo Shifted functions enabled A a NN e moun Square wave output D Frequency Hz duty cycle pulse width ms and level for square wave output Level ae Constant voltage output 14 U1401B User s and Service Guide Getting Started 1 Table 1 6 Description of display annunciators continued Thermocouple type for temperature test The U1401B supports K type thermocouple only Output enabled and output disabled Secondary display for
80. on Calibrator Meter User s and Service Guide 2 Calibrator Output Operations Enabling and Disabling the Output 28 Constant Voltage Operation 29 Constant Current Operation 30 Memory Generation 31 Autoscan output 31 Autoramp output 36 Square Wave Output 41 This chapters contains detailed information on how to generate signals using the U1401B 2 Calibrator Output Operations Enabling and Disabling the Output The U1401B can generate and measure signals simultaneously Pressing the OUTPUT key disables the U1401B output by placing it in the standby mode Pressing this key again toggles the output on When the output is in the standby mode the annunciator disappears and the annunciator is displayed instead This means the calibrator has stopped generating its output The standby mode will also be activated automatically if 28 you accidentally feed an external signal into the output terminals while the output function is enabled the noise from an external power system or output terminals causes an error signal to the output For example when ESD is performed with a voltage of 8000 V this instrument will go into standby mode an overload condition has been detected when generating constant voltage or square wave outputs the weak or low battery condition occurs This ensures output quality and serves as another alert to let the user know that the energy level of the batteries is low you put the slide switch into th
81. ons 157 Table 8 15 Diode check specifications 158 Table 8 16 Constant voltage CV output specifications 159 Table 8 17 Constant current CC output specifications 159 Table 8 18 Square wave output specifications 160 U1401B User s and Service Guide Figures U1401B User s and Service Guide Figures Figure 1 1 The slide switch 5 Figure 1 2 The front panel 7 Figure 1 3 The rotary switch 8 Figure 1 4 Keypad functions 9 Figure 1 5 Keypad shifted functions 10 Figure 1 6 Full display 13 Figure 1 7 Terminals 17 Figure 1 8 The rear panel 19 Figure 1 9 IR USB cable 24 Figure 1 10 IR USB cable connection 25 Figure 1 11 IR USB cable 25 Figure 2 1 Selecting autoscan output mode 34 Figure 2 2 Example of a typical autoscan output 34 Figure 2 3 Defining the autoscan output 36 Figure 2 4 Selecting autoramp output mode 38 Figure 2 5 Ramp output 38 Figure 2 6 Defining the autoramp output 40 Figure 2 7 Parameter selection for square wave output 43 Figure 3 1 DC voltage measurement 47 Figure 3 2 AC voltage measurement 48 Figure 3 3 DC current mA measurement 49 Figure 3 4 Surface temperature measurement 53 Figure 3 5 Resistance measurement 55 Figure 3 6 Enabling and disabling the continuity test 55 Figure 3 7 Dynamic recording mode 59 Figure 3 8 Relative zero mode 60 Figure 3 9 Data hold mode 61 Figure 3 10 1 ms peak hold mode 64 Figure 4 1 Entering the setup mode 66 Figure 4 2 Setting the d
82. or the autoramp output Mode CA 150000 C7 15 000 V C 25 000 mA 1 5000 V 015 steps 15 000 V 015 steps 25 000 mA 025 steps 1 5000 V 015 steps 15 000 V 015 steps 25 000 mA 025 steps 4 After selecting the required function press lt or gt to select one of two modes Continuous or Cycle The secondary display will indicate Cont or CyCLE respectively Figure 2 4 on page 38 e Continuous mode Cont In this mode the ramp signal is repeated continuously The signal will be generated according to the amplitudes and number of steps defined in the memory with each step taking approximately 0 33 seconds For instance according to the default settings Table 2 2 the step size of the positive slope is end amplitude start amplitude number of steps Therefore the step size is 1 5 V 1 5 V 15 steps 0 2 V for 1 5000 V The step size of the negative slope is start amplitude end amplitude number of steps Therefore the step size is 1 5 V 1 5 V 15 steps 0 2 V for 1 5000 V e Cycle mode CyCLE In this mode only one cycle of the ramp signal is generated The signal will be generated according to the amplitudes and number of steps defined in the memory with each step taking approximately 0 33 seconds and then the output amplitude will be maintained at the final value of the ramp signal 5 Press OUTPUT to start the source output The annunciator will appear on the display U1401B User s and
83. orces a current I V R1 to flow through the R2 load in the feedback path This current is independent of the load 1 Turn the rotary switch to the V position 2 Manually select the DC 50 V range for the voltage measurement 3 Connect the red and black probe leads to the positive and negative input terminals respectively 4 Connect the red and black alligator leads to the positive and negative output terminals respectively 5 Connect the operational amplifier as shown in Figure 5 14 6 Use a DC power supply with 15 V and 15 V outputs to power the operational amplifier 7 Gradually increase the U1401B output voltage from 00 000 mV to 06 000 V while measuring the output voltage of the operational amplifier You will find the output voltage increasing correspondingly from around 00 000 V to around 12 000 V You can then verify the characteristic of the voltage to current converter by performing the necessary calculations 8 As an alternative you can set the rotary switch to the mA position and connect the input probe leads in place of the meter A as shown in Figure 5 14 You will find that the measured current is proportional to the voltage input into the operational amplifier 110 U1401B User s and Service Guide Application Examples OUTPUT Hd INPUT Vo Vin R1 x R1 R2 A Vin 1 R2 R1 oom R2 J R1 Constant Voltage Output DC mA measuring DC Voltage measuring 00 000
84. ou can press at any time to restart the peak value measurement 63 3 Making Measurements Press nninn sey LALILILILS DH MAX a yy Ey aw J UU L OILILL l Press to change range Press to restart r sev LALILILILS Press Is Figure 3 10 1 ms peak hold mode 64 U1401B User s and Service Guide KEYSIGHT TECHNOLOGIES U1401B Handheld Multi Function Calibrator Meter User s and Service Guide 4 Changing the Default Settings Entering the Setup Mode 66 Available Setting Options 68 Setting the data hold refresh hold mode 69 Setting the temperature unit 71 Setting the beeper frequency 73 Setting the minimum measurable frequency 74 Setting the percentage scale readout 75 Setting the print mode 76 Setting the echo mode 77 Setting the data bit 78 Setting the parity check 79 Setting the baud rate 80 Setting the display backlight timer 81 Setting the power saving mode 82 This chapter describes how to change the default settings of the U1401B 4 Changing the Default Settings Entering the Setup Mode To enter the setup mode perform the following steps 1 Turn the instrument off 2 From the OFF position turn the rotary switch to any non OFF position while pressing and holding U1401B Multi Function Calibrator Meter mO OMAA Levei acoc JK J C F kH D get gogogo EDEN RIS EExd A N Bae Hee Avsec AUTO DH MAX AVG MIN ACDC Snooo00e2 ee ee ae ae
85. r cord according to country Silicone test leads 19 mm probes Alligator clips Yellow test lead for mA simulation Certificate of calibration Printed Quick Start Guide one English one local language Optional K type thermocouple input adapter and probe bundle K type thermocouple input adapter K type immersion probe Industrial surface probe Standard test lead kit Extended test lead kit Alligator clips Standard test lead set with 4 mm test probes Standard test leads with 4 mm probe tip IR to USB cable Soft carrying case for handheld and accessories 4 U1401B User s and Service Guide Getting Started 1 Product Overview Slide switch The slide switch has the following positions e Charge Select this position to charge the batteries Use the AC adapter provided to charge this instrument e M Select this position to enable only the measurement functions e M S Select this position to enable both the measurement and source functions Figure 1 1 The slide switch Table 1 2 Slide switch functions 1 External AC Allows an external AC adapter to be connected to adapter jack provide power or charge the batteries 2 CHARGE Charges the batteries with an external AC adapter Enables only the measurement functions a M S Enables both measurement and source functions U1401B User s and Service Guide 5 1 Getting Started Table 1 2 Slide switch functions continued No posesion fenton Charging Indic
86. r of mechanical components Manuals fuses and standard disposable batteries U1401B User s and Service Guide 149 8 Specifications Measurement Category The U1401B is intended to be used for measurement under Measurement Category II 150 V for altitude up to 2000 m Measurement category definitions Measurement CAT I Measurement CAT II Measurement CAT III Measurement CAT IV 150 Measurements performed on circuits that are not directly connected to MAINS For example measurements on circuits that are not derived from MAINS and specifically protected internal mains derived circuits Measurements performed on circuits that are directly connected to the low voltage installation For example measurements on household appliances portable tools and similar equipment Measurements performed in fixed building installation For example measurements on distribution boards circuit breakers wiring including cables bus bars junction boxes switches socket outlets in fixed installation equipment for industrial use and stationary motors with permanent connections to fixed installation Measurements performed at the source of the low voltage installation For example electricity meters measurements on primary overcurrent protection devices and ripple control units U1401B User s and Service Guide Specifications 8 Input Specifications The accuracy is given as of reading counts of least signi
87. rate the instrument around explosive gas vapor or dust Inspect the test probes for damaged insulation or exposed metal and check for continuity Do not use the test probe if it is damaged Do not use any other AC charger adapter apart from the one certified by Keysight with this product Do not use repaired fuses or short circuited fuse holders For continued protection against fire replace the line fuses only with fuses of the same voltage and current rating and recommended type U1401B User s and Service Guide CAUTION U1401B User s and Service Guide Do not service or perform adjustments alone Under certain condition hazardous voltages may exist even with the equipment switched off To avoid dangerous electric shock service personnel must not attempt internal service or adjustment unless another person capable of rendering resuscitation or first aid is present Do not substitute parts or modify equipment to avoid the danger of introducing additional hazards Return the product to the nearest Keysight Technologies Sales and Service Office for service 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 re
88. replacement markings Replace any blown fuse in the instrument according to the following procedures 1 Power down the instrument and disconnect all the test leads Make sure that the charging adapter is also removed 2 Remove the battery cover and the batteries 3 Loosen the three screws found on the bottom of the case and remove the bottom cover 4 Take out the circuit board as shown in Figure 6 3 5 Gently remove the defective fuse by prying one end of the fuse loose and sliding it out of the fuse bracket 6 Replace it with a new fuse of the same size and rating Make sure the new fuse is centered in the fuse holder 122 U1401B User s and Service Guide Maintenance 6 7 Throughout the fuse replacement procedures make sure that the knob of the rotary switch on the top case and the rotary switch itself on the circuit board remain at the OFF position 8 After replacing the fuse re fasten the circuit board and the bottom cover 9 Refer to Table 6 1 for the part number rating and size of the fuses Table 6 1 Fuse specifications 2110 1464 630 mA 250 V Fast blow ceramic type 2110 1883 68mA 250 Siow blow UL VDE U1401B User s and Service Guide 123 6 Maintenance Figure 6 3 Fuse replacement Troubleshooting WARNING To avoid electrical shock do not perform any servicing unless you are qualified to do so If the instrument fails to operate check the batteries and test leads Replace them if neces
89. rmance test procedure verifies that the Handheld Multi Function Calibrator Meter is operating within its published specifications The adjustment procedure ensures that the multimeter remains within its specifications until the next calibration 128 U1401B User s and Service Guide Performance Tests and Calibration 7 Closed case electronic calibration This instrument features closed case electronic calibration In other words no internal electro mechanical adjustment is required This instrument calculates correction factors based on the input reference signals you feed into it during the calibration process The new correction factors are stored in non volatile EEPROM memory until the next calibration adjustment is performed The contents of the non volatile EEPROM memory will not change even when the power is switched off Keysight Technologies calibration services When your instrument is due for calibration contact your local Keysight Service Center to inquire about recalibration services Calibration interval A one year calibration interval is adequate for most applications Accuracy specifications are warranted only if calibration is performed at regular intervals Accuracy specifications are not warranted beyond the one year calibration interval Keysight does not recommend extending calibration intervals beyond 2 years for any application U1401B User s and Service Guide 129 7 Performance Tests and Calibration
90. s continued Description Function Resistance measurement and Constant voltage 1 5 V 15 V continuity test Diode and continuity tests Constant current 25 mA DC AC or AC DC mA e Constant voltage 1 5 V 15 V measurements 50 mA or 500 mA Constant current 25 mA e Square wave output The keypad at a glance The operation of each key is shown below A related annunciator appears on the display and the instrument beeps when a key is pressed Turning the rotary switch to another position resets the present operation of the key AUTO OUTPUT Figure 1 4 Keypad functions U1401B User s and Service Guide 9 1 Getting Started MODE lt 8 How HOLD Gna Gane Guat DUAL 7 SHIFT MAXMIN mV AUTO Cay 41 Hz Figure 1 5 Keypad shifted functions Table 1 4 Keypad functions Key Function when pressed for less than one Function when pressed for more than one second second a Selects DC AC or AC DC Toggles between peak hold ON or OFF for V and mA measurement If the data hold mode is enabled Exits data hold model Freezes the present measured value Press again to trigger the next measured value If the refresh hold mode is enabled Enters or exits the refresh hold mode MAX MINI Cycles through MAX MIN AVG and present Enters or exits the dynamic recording model MAX AVG MIN readings in dynamic recording mode A NULL Saves the displayed value as a reference to be Tog
91. sary After that if the instrument still does not function check to ensure that you have followed the operating procedures given in this instruction manual before considering servicing the instrument 124 U1401B User s and Service Guide Table 6 2 Troubleshooting Maintenance When servicing the instrument use only the specified replacement parts Table 6 2 will assist you in identifying some of the basic problems 6 Malfunction Identification of the problem LCD display after switching e Check the position of the slide switch Set it to the M or M S position e Check the batteries Recharge or replace the batteries if necessary No beeper tone Check the setup mode to see if the beeper has been disabled OFF Select the desired driving frequency Failed to measure current Check fuse 1 No output signal when e the annunciator Is displayed e the OUTPUT key is pressed and the annunciator only appeared for a short while before being replaced by the annunciator No charging indication Remote control failure e The batteries are low e Check the position of the slide switch Set it to the M S position e Check the external load to see whether the rated limit is exceeded e Check whether the loop has a 24 V power If yes use the special yellow test lead for mA simulation see Chapter 5 Simulation Mode for mA Output e Check fuse 2 e Set the slide switch to the CHARGE position e Check the ex
92. tarted Display selection with the DUAL key Press to enable the dual display function in which two separate parameters of the measured signal is displayed simultaneously on the primary and secondary displays The dual display function is not available in dynamic recording or trigger mode Refer to Table 1 10 Table 1 10 Measurement functions and corresponding display selection with the DUAL key He ACeouping 0 mA to 20 mA or 4 mA to 20 mA 0 mA to 20 mA or 4 mA to 20 mA 22 U1401B User s and Service Guide Getting Started 1 Remote Communication U1401B User s and Service Guide The U1401B has a bidirectional full duplex communication capability that makes it very easy to transfer data from the instrument to a PC The required accessory for this feature is an optional IR USB cable to be used with an application software that is downloadable from the Keysight Web site To communicate with the personal computer through remote communication 1 Set up the communication parameters of the instrument and the personal computer you are using The default values for baud rate parity data bits and stop bit for the instrument are 9600 n 8 and 1 respectively 2 Make sure that the USB driver and the Keysight data logger software has been installed on your computer You will need to download the Keysight data logger software from Keysight s website in order to use this feature Please go to http www keysight com fin
93. tary switch tomV Connect the Normal 0 05 V Press to select DC Hi Low output terminals of the calibrator to the 0 05 V U1401B input terminals 05V AT V Press a to select fo 5V 2 mV DC Turn the rotary switch to 250 V 0 125 V 250 V 0 125 V Turn the rotary switch to mV Connect the Normal 50 mVrms 0 39 mVrms Press to select AC Hi Low output terminals of 45 Hz the calibrator to the U1401B input terminals 50 mVrms 5 kHz 50 mVrms 0 79 mVrms 20 kHz U1401B User s and Service Guide 133 7 Performance Tests and Calibration Table 7 3 Input performance verification tests continued Error from nominal 1 Test Function Connection to 5520A Range 5520A output year Turn the rotary switch to Connect the Normal 500 mV 500 mVrms 3 7 mVrms AZV Press toselect Hi Low output terminals of 45 Hz AC the calibrator to the U1401B input terminals 500 mVrms 3 7 mVrms 5 kHz 500 mVrms 7 mVrms 20 kHz 5 Vrms 37 mVrms 45 Hz 5 Vrms 37 mVrms 5 kHz 5 Vrms 77 mVrms 20 kHz 50 Vrms 0 37 Vrms 45 Hz 50 Vrms 0 37 Vrms 5 kHz 50 Vrms 0 77 Vrms 20 kHz 250 Vrms 1 95 Vrms 45 Hz 250 Vrms 1 95 Vrms 5 kHz 250 Vrms 3 95 Vrms 20 kHz 134 U1401B User s and Service Guide Table 7 3 Input performance verification tests continued i Test Function Turn the rotary switch to ASV Press to select frequency Turn the rotary switch to AS V Press to select duty cycle
94. teries 122 Figure 6 3 Fuse replacement 124 U1401B User s and Service Guide U1401B Handheld Multi Function Calibrator Meter User s and Service Guide 1 Getting Started Introducing the U1401B Handheld Multi Function Calibrator Meter 2 Standard Purchase Items 3 List of Accessories 4 Product Overview 5 Slide switch 5 The front panel ata glance 7 The rotary switch ata glance 8 The keypad ataglance 9 The display ata glance 13 The terminals ata glance 17 The rear panel ata glance 19 Display selection with the Hz key 20 Display selection with the DUAL key 22 Remote Communication 23 This chapter contains a brief description of the U1401A Handheld Multi Function Calibrator Meter front panel rotary switch keypad display terminals and rear panel KEYSIGHT TECHNOLOGIES 1 Getting Started Introducing the U1401B Handheld Multi Function Calibrator Meter The key features of the U1401B are Simultaneous signal generation and measurement DC AC and AC DC voltage and current measurements DC voltage DC current and square wave outputs Intelligent output and standby control Rechargeable Ni MH battery with built in charging capability Smart charger design without battery removal Bright Electroluminescence EL backlight with 5 digit LCD display Percentage scale readout for 4 20 mA or 0 20 mA measurement Load driving capability up to 1200 Q for 20 mA simulation with yellow test lead Adjustable steps and tim
95. ternal adapter to see whether the output is 24 VDC and whether it is properly plugged in to the charging terminal e Check the line power voltage 100 VAC to 250 VAC 47 Hz 63 Hz and the power cord e Make sure that the optical side of cable is connected to the instrument and the text side of the connector cover should be facing up e Check the baud rate parity data bit and stop bit default settings 9600 n 8 1 e Install the driver for IR USB on your PC U1401B User s and Service Guide 125 6 Maintenance Replacement parts This section contains information for ordering replacement parts for the U1401B Table 6 3 includes a brief description of each replacement part with its corresponding part number You may find the latest U1401B parts list in the Keysight Test and Measurement Parts Catalog http www keysight com find parts To order replacement parts Not all parts listed are available as field replaceable parts To order replacement parts from Keysight 1 Contact your nearest Keysight Sales Office or Service Center 2 Identify the parts by their corresponding Keysight part numbers shown in the replacement parts list 3 Provide the instrument model number and serial number Table 6 3 Replacement parts list Part number Description U1401 46400 Battery cover without screw U1401 60027 Battery assembly rechargeable 1 2 V NIMH 1300 mAh No 3 0515 5254 Battery cover screw tapping button HD Phillips M3
96. the black lead The cathode of a diode is the side indicated with band s 4 Reverse the probe leads and measure the voltage across the diode again 5 If the diode is e Good In step 3 a forward voltage drop typically from 0 3 V to 0 8 V is indicated the instrument can display diode voltage drops up to approximately 2 1 V accompanied by a beep In step 4 OL is indicated e Shorted A voltage drop of nearly O V is indicated in both directions and the instrument will beep continuously e Open OL is indicated in both directions 96 U1401B User s and Service Guide U1401B User s and Service Guide Application Examples U1401B Multi Function Calibrator Meter Forward bias Reverse bias CAT II 150V OUTPUT 15 25mA MAX FUSED Oa Figure 5 6 Diode test 5 97 5 Application Examples Bipolar Junction Transistor BJT Test A BJT typically has three terminals namely emitter E base B and collector C There are two types of BJT depending on polarity PNP type and NPN type It is recommended that you obtain the specific data sheet from the manufacturers You can also use the U1401B to identify the polarity and terminals of a BJT by following the procedure below 1 Turn the rotary switch to the position 2 Connect the red and black test leads to the positive and negative input terminals respectively The positive terminal will provide a positive test voltage
97. tions are protected against overloads for the limits specified in Table 1 8 The other two terminals are for output functions with DC 30 V overload protection U1401B User s and Service Guide 17 18 1 Getting Started Table 1 8 Overload protection for the input terminals Rotary switch position Input terminal Overload protection AC DC voltage range and 250 Vrms 5 V to 250 V AC DC voltage range 50 mV to 500 mV Ohm Q Diode Temperature AC DC current range 250 V 630 mA 50 mA to 500 mA fast acting fuse U1401B User s and Service Guide Getting Started The rear panel at a glance U1401B User s and Service Guide RS 252C A WARNING RATING 1 5Vx8 5VA USE BATTERY LR6x8 or HR15 51x8 Do not use new batteries together with old ones Also do not mix batteries of different type CONTAINS NICKEL METAL HYDRIDE BATTERY MUST BE RECYCLED OR DISPOSED OF PROPERLY H ICES NMB 001 ISM 1 A N10149 pzd A WARNING E TO AVOID ELECTRICAL SHOCK REMOVE TEST LEADS BEFORE OPENING CASE DO NOT OPERATE WITH OPEN CASE TO PREVENT DAMAGE OR INJURY INSTALL FUSES WITH AMP VOLT RATING CE Figure 1 8 The rear panel 19 1 Getting Started Display selection with the Hz key The frequency measurement function is able to detect the presence of harmonic currents in neutral conductors and determines whether these neutral currents are the result of unbalanced phases or non
98. turn the product to the nearest Keysight Technologies Sales and Service Office for service and repair to ensure the safety features are maintained Turn off circuit power and discharge all high voltage capacitors in the circuit before you perform resistance and capacitance measurements or continuity and diode tests Use the correct terminals function and range for your measurements Do not measure voltage when current measurement is selected Use only the recommended rechargeable battery Ensure proper insertion of battery in the instrument and follow the correct polarity Disconnect test leads from all the terminals during battery charging Environmental Conditions Vi CAUTION CAUTION This instrument is designed for indoor use and in areas with low condensation The table below shows the general environmental requirements for this instrument Environmental conditions Requirements Operating temperature Full accuracy from 0 C to 40 C Operating humidity Full accuracy up to 80 R H relative humidity for temperature up to 31 C decreasing linearly to 50 R H at 40 C Storage temperature 20 C to 60 C with battery removed Storage humidity 5 to 80 R H non condensing Altitude Up to 2000 m Pollution degree Pollution Degree 2 The Handheld Multi Function Calibrator Meter complies with the following safety and EMC requirements e IEC 61010 1 2001 EN61010 1 2001 2nd Edition e Canada CAN CSA C22 2
99. type thermocouple to the U1401B input terminals 40 C to 1372 C 40 F to 2502 F U1401B User s and Service Guide Performance Tests and Calibration 7 Output performance verification To verify the output functions of the Handheld Multi Function Calibrator Meter perform the verification tests listed in Table 7 4 Refer to Table 7 1 on page 131 for the recommended test equipment for verifying each function Table 7 4 Output performance verification tests Nominal Recommended test Range or U1401B error within equipment and connection parameter output 1 year Turn the rotary switch to Connect the U1401B output 1 5000 V 0 75 mV any one of the terminals to the 34405A Turn the rotary switch to Connect the U1401B output 25 000 mA 12 5 pA any one of the amp terminals to the 34405A positions Multimeter 12 5 pA Turn the rotary switch to Connect the U1401B output Frequency 4 8 kHz 0 25 Hz any one ofthe TUUL terminals to the 53131A 10 kHz positions Universal Counter Frequency 600 Hz 0 04 Hz i ae ee Duty cycle 5V 25 0 203 0 39 to 150 Hz 99 60 5V 5 0 208 U1401B User s and Service Guide 137 7 Performance Tests and Calibration Adjustment Considerations 138 CAUTION To adjust calibrate the instrument you will need a set of test input cables and connectors for receiving the reference signals You will also need a shorting plug Adjustments for each function
100. uide Making Measurements 3 Measuring Temperature CAUTION Do not bend the thermocouple leads at sharp angles Repeated bending over a period of time may break the leads The bead type thermocouple probe is suitable for measuring temperature from 40 C to 204 C in PTFE compatible environments Above this temperature range probes may emit toxic gas Do not immerse the thermocouple probe in any liquid For best results use a thermocouple probe designed for each specific application an immersion probe for liquid or gel and an air probe for air measurements Observe the following measurement techniques e Clean the surface to be measured and make sure that the probe is securely touching the surface Remember to disable the applied power e When measuring above the ambient temperature move the thermocouple along the surface until you get the highest temperature reading e When measuring below the ambient temperature move the thermocouple along the surface until you get the lowest temperature reading e Always set the slide switch to the M position meter operation only Place the instrument in the operating environment for at least one hour as the instrument is using a non compensation transfer adapter with miniature thermal probe If you are using the type of thermocouple probe where the thermal wires penetrate into the banana or lantern terminals you only need to place the instrument in the operating environment for at
101. under different frequency Else the accuracy and range will be different from the definition 2 For signal frequencies greater than 1 kHz an addition of 0 1 per kHz is added to the accuracy 160 U1401B User s and Service Guide www keysight com Contact us To obtain service warranty or technical assistance contact us at the following phone or fax numbers United States tel 800 829 4444 fax 800 829 4433 Canada tel 8778944414 fax 800 746 4866 China tel 8008100189 fax 800 820 2816 Europe tel 31 20 547 2111 Japan tel 81 426 56 7832 fax 81 426 56 7840 Korea tel 080 769 0800 fax 080 769 0900 Latin America tel 305 269 7500 Taiwan tel 0800 047 866 fax 0800 286 331 Other Asia Pacific Countries tel 65 6375 8100 fax 65 6755 0042 Or visit the Keysight World Wide Web at www keysight com tind assist Product specifications and descriptions in this document are subject to change without notice Always refer to the English version on the Keysight Web site for the latest revision This information is subject to change without notice Keysight Technologies 2009 2015 Edition 13 July 16 2015 KEYSIGHT U1401 90055 TECHNOLOGIES www keysight com
102. w CAL 1 and 00000 respectively 3 Press A or w to adjust the output voltage until the reading on the meter is the same as the CAL 0 value recorded above 4 Press MODE to finish the CAL 0 and CAL 1 calibration 144 U1401B User s and Service Guide U1401B User s and Service Guide Performance Tests and Calibration 7 After finishing the CAL 0 and CAL 1 calibration procedures the instrument will automatically enter the 1 5 V output calibration mode Output voltage calibration Follow the steps below to perform calibration for the output voltage ranges and values listed in Table 7 6 1 As you enter each calibration step the primary and secondary displays show the output voltage value and rdy respectively 2 Press OUTPUT The primary and secondary displays show the output voltage value and 00000 respectively which means the present output level is as shown on the primary display 3 Press A or w to adjust the output voltage until the multimeter reading is the same as the value shown on the primary display 4 Press MODE to enter the next calibration step Table 7 6 Output voltage calibration steps Calibration Voltage range step Output voltage value 15V 1 1000 V ee ee At the end of the last calibration step the primary display will show PASS after the MODE button is pressed 145 7 Performance Tests and Calibration Output current calibration 1 Without exiting the calibration
103. will appear on the display e The default settings for the parameters are 150 Hz frequency 50 00 duty cycle 3 3333 ms pulse width and 5 V amplitude See Figure 2 7 3 Press OUTPUT to output the square wave signal Table 2 3 Available frequencies Frequency Hz 0 5 1 2 5 10 15 20 25 30 40 50 60 75 80 100 120 150 200 240 300 400 480 600 800 1200 1600 2400 4800 There are 28 frequencies to choose from See Table 2 3 To change the frequency 1 Press SHIFT to access the shifted operations of the keypad The annunciator will appear on the display 2 Press MODE to select frequency adjustment The D annunciator will appear on the display Select the frequency by pressing A or w 4 Press OUTPUT to output the signal 41 2 42 Calibrator Output Operations The duty cycle can be stepped through 256 equal steps with each step equivalent to 0 390625 and you can set its value from 1 to 255 steps 0 390625 to 99 609375 However the display can only indicate this to the nearest 0 01 To adjust the duty cycle 1 Press MODE to select duty cycle adjustment The annunciator will appear on the display 2 Press A or w to adjust the duty cycle The pulse width can be stepped through 256 equal steps with each step being equal to 1 256 x frequency You can set its value from 1 to 255 steps To adjust the pulse width 1 Press MODE to select pulse width adjustment The ns annunci

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