Keysight U1401B User'S And Service Manual Download Page 136

Page: 136 / 159

Maintenance

136

Keysight U1401B User’s and Service Guide

Troubleshooting

If the instrument fails to operate, check the batteries and test leads. Replace them

if necessary. 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.
When servicing the instrument, use only the specified replacement parts.

Table 6-2

will assist you in identifying some of the basic problems.

WARNING

To avoid electrical shock, do not perform any servicing unless you are
qualified to do so.

Summary of Contents for U1401B

Page 1: ...Keysight U1401B Handheld Multi Function Calibrator Meter User s and Service Guide ...

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

Page 3: ...rnating current Caution risk of electric shock Three phase alternating current Caution risk of danger refer to this manual for specific Warning or Caution information Earth ground terminal Caution hot surface Protective conductor terminal Out position of a bistable push control Frame or chassis terminal In position of a bistable push control Equipotentiality CAT II 150 V Category II 150 V overvolt...

Page 4: ...inal and earth ground 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 When connecting probes always connect the...

Page 5: ... 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 verif...

Page 6: ... measurements on household appliances portable tools and similar equipment Measurement CAT III Measurements performed in the building installation Examples are measurements on distribution boards circuit breakers wiring including cables bus bars junction boxes switches socket outlets in the fixed installation and equipment for industrial use and some other equipment including stationary motors wit...

Page 7: ...ion degree 2 CAUTION The Handheld Multi Function Calibrator Meter complies with the following safety and EMC requirements IEC 61010 1 2001 EN61010 1 2001 2nd Edition Canada CAN CSA C22 2 No 61010 1 04 USA ANSI UL 61010 1 2004 IEC61326 2 1 2005 EN61326 2 1 2006 Canada ICES NMB 001 2004 Australia New Zealand AS NZS CISPR11 2004 CAUTION Degradation of some product specifications can occur in the pres...

Page 8: ...ustralian Communications and Media Authority ICES NMB 001 indicates that this ISM device complies with the Canadian ICES 001 Cet appareil ISM est conforme a la norme NMB 001 du Canada 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 The CSA...

Page 9: ...oring and Control Instrument product The affixed product label is as shown below Do not dispose in domestic household waste To return this unwanted instrument contact your nearest Keysight Service Center or visit http about keysight com en companyinfo environment takeback shtml for more information Sales and Technical Support To contact Keysight for sales and technical support refer to the support...

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Page 11: ...01B Handheld Multi Function Calibrator Meter 20 Standard Purchase Items 21 List of Accessories 22 Product Overview 23 Slide switch 23 The front panel at a glance 24 The rotary switch at a glance 25 The keypad at a glance 26 The display at a glance 30 The terminals at a glance 34 The rear panel at a glance 36 Display selection with the Hz key 37 Display selection with the DUAL key 39 Remote Communi...

Page 12: ...Continuity 67 Alerts and Warning During Measurement 69 Overload alert for voltage measurement 69 Math Operations 70 Dynamic recording 70 Relative zero 72 Triggering Operations 73 Data hold manual trigger 73 Refresh hold auto trigger 74 1 ms peak hold 75 4 Changing the Default Settings Entering the Setup Mode 78 Available Setting Options 80 Setting the data hold refresh hold mode 81 Setting the tem...

Page 13: ...Transducer 104 Zener Diode Test 106 Diode Test 108 Bipolar Junction Transistor BJT Test 110 Determining transistor hfe 114 Junction Field Effect Transistor JFET Switch Test 116 Operational Amplifier Verification 120 Current to voltage converter 120 Voltage to current converter 122 Integrator square wave to triangle wave conversion 123 2 Wire Transmitter Verification 125 Frequency Transmitter Verif...

Page 14: ...ation interval 140 Other recommendations for calibration 141 Environmental conditions 141 Warm up 141 Recommended Test Equipment 142 Performance Verification Tests 143 Self verification 143 Input performance verification 144 Output performance verification 147 Adjustment Considerations 148 Adjustment Procedures 149 Input calibration 149 Output calibration 153 8 Characteristics and Specifications ...

Page 15: ...ure 2 5 Ramp output 54 Figure 2 6 Defining the autoramp output 55 Figure 2 7 Parameter selection for square wave output 58 Figure 3 1 DC voltage measurement 61 Figure 3 2 AC voltage measurement 62 Figure 3 3 DC current mA measurement 63 Figure 3 4 Surface temperature measurement 66 Figure 3 5 Resistance measurement 68 Figure 3 6 Enabling and disabling the continuity test 68 Figure 3 7 Dynamic reco...

Page 16: ...ure 5 3 Use the yellow test lead to perform the 2 wire transmitter simulation 103 Figure 5 4 Pressure transducer measurement 105 Figure 5 5 Zener diode test 107 Figure 5 6 Diode test 109 Figure 5 7 TO 92 Transistor 110 Figure 5 8 TO 3 Transistor 113 Figure 5 9 Determining transistor hfe 115 Figure 5 10 TO 92 JFET 116 Figure 5 11 N Channel JFET 118 Figure 5 12 P Channel JFET 119 Figure 5 13 Current...

Page 17: ...3 Table 2 3 Available frequencies 56 Table 3 1 Measurement ranges for audible continuity 67 Table 4 1 Setup options and default settings 80 Table 5 1 Typical pressure range and maximum output voltages of millivolt output pressure transducers 104 Table 5 2 Base terminal according to probe test 111 Table 5 3 Polarity and terminals if Pin 3 is the base 111 Table 5 4 Polarities and terminals if Pin 2 ...

Page 18: ...18 Keysight U1401B User s and Service Guide Table 7 6 Output voltage calibration steps 154 Table 7 7 Output current calibration steps 155 ...

Page 19: ...ng the U1401B Handheld Multi Function Calibrator Meter 20 Standard Purchase Items 21 List of Accessories 22 Product Overview 23 Remote Communication 40 This chapter contains a brief description of the U1401A Handheld Multi Function Calibrator Meter front panel rotary switch keypad display terminals and rear panel ...

Page 20: ... 0 20 mA measurement Load driving capability up to 1200 Ω for 20 mA simulation with yellow test lead Adjustable steps and time 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 ...

Page 21: ...dheld Multi Function Calibrator Meter Protective holster Rechargeable battery pack 1 2 V NiMH AA 8 Power cord and AC power adapter Silicone test leads 19 mm probes Alligator clips Yellow test lead for mA simulation Certificate of calibration Printed Quick Start Guide If anything is missing contact your nearest Keysight Technologies Sales and Service Office ...

Page 22: ...Yellow test lead for mA simulation Certificate of calibration Printed Quick Start Guide one English one local language Optional U1186A K type thermocouple input adapter and probe bundle U1184A K type thermocouple input adapter U1181A K type immersion probe U1182A Industrial surface probe U1183A Air probe U1160A Standard test lead kit U1161A Extended test lead kit U1162A Alligator clips U1168A Stan...

Page 23: ...sition to enable both the measurement and source functions Figure 1 1 The slide switch 1 2 3 4 5 6 Table 1 2 Slide switch functions No Description Function 1 External AC adapter jack Allows an external AC adapter to be connected to provide power or charge the batteries 2 CHARGE Charges the batteries with an external AC adapter 3 M Enables only the measurement functions 4 M S Enables both measureme...

Page 24: ...1 Getting Started 24 Keysight U1401B User s and Service Guide The front panel at a glance Figure 1 2 The front panel Display Keypad Rotary switch Terminals ...

Page 25: ...he output source function while the inner circle indicates the input meter function Figure 1 3 The rotary switch 1 2 3 4 5 6 Table 1 3 Rotary switch positions and their corresponding functions No Description Function Input white Output orange 1 OFF 2 DC AC or AC DC voltage measurements Square wave output Constant current 25 mA Constant voltage 1 5 V 15 V 3 DC AC or AC DC mV measurements or tempera...

Page 26: ...ning the rotary switch to another position resets the present operation of the key Figure 1 4 Keypad functions 5 Diode and continuity tests Constant current 25 mA 6 DC AC or AC DC mA measurements 50 mA or 500 mA Constant voltage 1 5 V 15 V Constant current 25 mA Square wave output Table 1 3 Rotary switch positions and their corresponding functions continued No Description Function Input white Outp...

Page 27: ...If the refresh hold mode is enabled Enters or exits the refresh hold mode MAX MIN b Cycles through MAX MIN AVG and present MAX AVG MIN readings in dynamic recording mode Enters or exits the dynamic recording mode a 3 Δ NULL Saves the displayed value as a reference to be subtracted from subsequent measurements Toggles between mV and temperature tests 4 RANGE Changes measurement range Sets to autora...

Page 28: ...PUT Toggles the output state on and off indicates that the signal is being generated and indicates that the output has been disabled a 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 mode pressing this key for more than one second will exit the data hold mode if the instrument is not i...

Page 29: ...ughout this manual instructions that involve shifted functions will be given without explicit mention of the SHIFT key Refer to Table 1 5 on page 29 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 a then press Press Press SHIFT a then press Press Press SHIFT a then press Press Press ...

Page 30: ...e 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 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 ke...

Page 31: ...ontrol Scan output Ramp output Shifted functions enabled AUTO Autorange Relative mode Low battery indication Auto power off enabled Square wave output Frequency Hz duty cycle pulse width ms and level for square wave output Constant current output Constant voltage output Thermocouple type for temperature test The U1401B supports K type thermocouple only ...

Page 32: ...Trigger manual hold MAXAVGMIN Dynamic recording mode Present value on primary display MAX Dynamic recording mode Maximum value on primary display AVG Dynamic recording mode Average value on primary display MIN Dynamic recording mode Minimum value on primary display ACDC Alternating direct current Primary display for input Input units for primary display Table 1 6 Description of display annunciator...

Page 33: ...sitive 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 Table 1 6 Description of display annunciators continued LCD display annunciator Description ...

Page 34: ...ified in Table 1 8 The other two terminals are for output functions with DC 30 V overload protection WARNING To avoid damaging this instrument do not exceed the rated input limit 2 1 Table 1 7 Description of terminals No Description Function 1 OUTPUT Orange For constant voltage constant current and square wave output functions 2 INPUT Grey white For voltage current and resistance measurements and ...

Page 35: ...Overload protection for the input terminals Rotary switch position Input terminal Overload protection AC DC voltage range 5 V to 250 V and 250 Vrms AC DC voltage range 50 mV to 500 mV Ohm Ω Diode Temperature AC DC current range 50 mA to 500 mA 250 V 630 mA fast acting fuse ...

Page 36: ...1 Getting Started 36 Keysight U1401B User s and Service Guide The rear panel at a glance Figure 1 8 The rear panel ...

Page 37: ...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 Measurement function Primary ...

Page 38: ...lse width ms Current in percentage scale 0 mA to 20 mA or 4 mA to 20 mA Frequency Hz Current in percentage scale 0 mA to 20 mA or 4 mA to 20 mA Duty cycle Pulse width ms Table 1 9 Measurement functions and corresponding display selection with the Hz key continued Measurement function Primary display Secondary display ...

Page 39: ...able 1 10 Measurement functions and corresponding display selection with the DUAL key Measurement function Primary display Secondary display AC voltage AC voltage Hz AC coupling DC voltage DC voltage Hz DC coupling AC DC voltage AC DC voltage Hz AC coupling DC current DC current Hz DC coupling AC current AC current Hz AC coupling AC DC current AC DC current Hz AC coupling Current in percentage sca...

Page 40: ...unication port on the instrument Make sure that the text side is facing upwards See Figure 1 10 on page 41 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 42 7 It is not recommended...

Page 41: ...Getting Started 1 Keysight U1401B User s and Service Guide 41 Figure 1 9 IR USB cable Figure 1 10 IR USB cable connection Text side facing upward IR USB cable ...

Page 42: ...g Started 42 Keysight U1401B User s and Service Guide Figure 1 11 IR USB cable Press this flap while moving in the direction indicated by the arrows to connect or disconnect the IR USB cable Disconnect Connect ...

Page 43: ...vice Guide 43 2 Calibrator Output Operations Enabling and Disabling the Output 44 Constant Voltage Operation 45 Constant Current Operation 46 Memory Generation 47 Square Wave Output 56 This chapters contains detailed information on how to generate signals using the U1401B ...

Page 44: ...if 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...

Page 45: ...utput 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 47 depending on the voltage range you require 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 s...

Page 46: ...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 47 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 ...

Page 47: ...es and number of steps for linear simulation Autoscan output To set the autoscan output 1 Turn the rotary switch to any one of the 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 For voltage output press MODE to cycle through 1 5 V 15 V 1 5 V 1...

Page 48: ...g 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 s...

Page 49: ...0 mA 02 sec 5 0 3000 V 02 sec 03 000 V 02 sec 16 000 mA 02 sec 6 0 0000 V 02 sec 00 000 V 02 sec 20 000 mA 02 sec 7 0 3000 V 02 sec 03 000 V 02 sec 16 000 mA 02 sec 8 0 6000 V 02 sec 06 000 V 02 sec 12 000 mA 02 sec 9 0 9000 V 02 sec 09 000 V 02 sec 08 000 mA 02 sec 10 1 2000 V 02 sec 12 000 V 02 sec 04 000 mA 02 sec 11 1 5000 V 02 sec 15 000 V 02 sec 00 000 mA 02 sec 12 0 0000 V 00 sec 00 000 V 0...

Page 50: ...2 Calibrator Output Operations 50 Keysight U1401B User s and Service Guide Figure 2 1 Selecting autoscan output mode Figure 2 2 Example of a typical autoscan output Press or Press or Press or ...

Page 51: ... 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 For amplitude adjustment press and to select the digit to be adjusted and then press and 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 ...

Page 52: ... the shifted operations of the keypad The annunciator will appear on the display 3 Follow one of the instructions below 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 For current output press MODE to cycle through 25 mA 25 mA and 25 mA output modes Select the ...

Page 53: ...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 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 s...

Page 54: ... 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 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 st...

Page 55: ... V or 15 V for constant voltage output 25 mA for constant current output For adjusting the number of steps press and to select the digit to be adjusted then press and to adjust the value of the selected digit The number of steps can be set within the range of 0 to 999 steps Press for more than one second to directly reset the time interval and amplitude of the present step to zero 2 Press OUTPUT t...

Page 56: ... position 2 Press SHIFT to access the shifted operations of the keypad The annunciator will appear on the display 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 There are 28 frequencies to choose from See Table 2 3 To change the frequency 1 Press SHIFT to access the...

Page 57: ...e annunciator will appear on the display 2 Press or to adjust the duty cycle The pulse width can be stepped through 256 equal steps with each step being equal to 1 256 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 annunciator will appear on the display 2 Press or to adjust the pulse width The amplitude can be set as ...

Page 58: ...2 Calibrator Output Operations 58 Keysight U1401B User s and Service Guide Figure 2 7 Parameter selection for square wave output Press MODE Press Press MODE Press MODE MODE ...

Page 59: ...rements Measuring Voltage 60 Measuring Current 63 Measuring Temperature 65 Measuring Resistance and Testing Continuity 67 Alerts and Warning During Measurement 69 Math Operations 70 Triggering Operations 73 This chapter contains the detailed information on how measurements are taken using the U1401A ...

Page 60: ...rn the rotary switch to 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 61 4 Probe the test points and read the display 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...

Page 61: ...Making Measurements 3 Keysight U1401B User s and Service Guide 61 Figure 3 1 DC voltage measurement ...

Page 62: ...uring AC voltage 1 Turn the rotary switch to 2 Press to select AC voltage measurement 3 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 Figure 3 2 AC voltage measurement ...

Page 63: ...rement 1 Turn the rotary switch to 2 Press to select DC current measurement 3 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 Figure 3 3 DC current mA measurement ...

Page 64: ...to 20 mA in the Setup mode refer to Chapter 4 Setting the percentage scale readout 2 Turn the rotary switch to 3 Press to select percentage scale display for DC mA measurement 4 Connect the red and black test leads to the positive and negative input terminals respectively 5 Probe the test points in series with the circuit and read the display The inset display in Figure 3 3 shows the percentage sc...

Page 65: ...et 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 env...

Page 66: ...t follow these steps 1 Press to select 0 C compensation This allows a quick measurement of the relative temperature 2 Avoid contact between the thermocouple probe and the surface to be measured 3 After a constant reading is obtained press to set the reading as the relative reference temperature 4 Touch the surface to be measured with the thermocouple probe 5 Read the display for the relative tempe...

Page 67: ...ible continuity function ON or OFF For the 500 Ω range the instrument will beep if the resistance value falls below 10 Ω For other ranges the instrument will beep if the resistance falls below the typical values indicated in the table below CAUTION Disconnect circuit power and discharge all high voltage capacitors before measuring resistance to prevent possible damage to the instrument or the devi...

Page 68: ...3 Making Measurements 68 Keysight U1401B User s and Service Guide Figure 3 5 Resistance measurement Figure 3 6 Enabling and disabling the continuity test Press ...

Page 69: ...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 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 ...

Page 70: ...y 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 71 While you are viewing the recorded maximum minimum or average readings the instrument will continue to measure...

Page 71: ...Making Measurements 3 Keysight U1401B User s and Service Guide 71 Figure 3 7 Dynamic recording mode Press 1 s Press 1 s Press 1 s Press 1 s Press Press Press Press ...

Page 72: ...ranges but it cannot be set if the present reading is overload OL 3 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 in...

Page 73: ...d 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 Figure 3 9 Data hold mode Press ...

Page 74: ...ciator will appear on the display 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 while it waits for a stable new reading the DH annunciator will flash 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 instrume...

Page 75: ...ak 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 75 3 If the reading is OL press to change the measurement range and restart the peak value measurement 4 While the peak ...

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Page 77: ...eld Multi Function Calibrator Meter User s and Service Guide 77 4 Changing the Default Settings Entering the Setup Mode 78 Available Setting Options 80 This chapter describes how to change the default settings of the U1401B ...

Page 78: ...ice Guide 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 Figure 4 1 Entering the setup mode Press and hold Turn on ...

Page 79: ...rm the following steps a Press or to scroll through the available menu items b Press or to change or select the setting See Table 4 1 on page 80 for details on the available options c 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 ...

Page 80: ...eep 4800 Hz 2400 Hz 1200 Hz 600 Hz Sets the beeper frequency 4800 Hz OFF Disables the beeper FrEq Minimum frequency measurement 0 5 Hz 1 Hz 2 Hz Sets the minimum frequency that can be measured 0 5 Hz PECnt Percentage scale 4 20mA 0 20mA Selects which percent scale readout is used 4 20 mA Print Print On or OFF ON Enables automatic and continuous transmission of data to PC OFF Echo Echo On or OFF ON...

Page 81: ...00 Hz Sets baud rate for remote communication with a PC remote control 9600 Hz bLit Display backlight timer 1 to 99 s Sets the timer for automatically turning off the LCD display backlight 30 sec OFF Disables the LCD display backlight from automatically turning off AoFF Auto power off 1 to 99 min Sets the timer for auto power off 15 min OFF Disables auto power off a The temperature menu item will ...

Page 82: ...4 Changing the Default Settings 82 Keysight U1401B User s and Service Guide Figure 4 2 Setting the data hold or refresh hold mode Press Press Press Press Press ...

Page 83: ...s of temperature unit display are available Celsius only C on the primary display Celsius C on the primary display and Fahrenheit F on the secondary display for dual display setting Fahrenheit only F on the primary display Fahrenheit F on the primary display and Celsius C on the secondary display for dual display setting ...

Page 84: ...g the Default Settings 84 Keysight U1401B User s and Service Guide Figure 4 3 Setting the temperature unit Press SHIFT for more than one second to enable temperature unit menu item Press Press Press Press Press ...

Page 85: ... U1401B User s and Service Guide 85 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 Figure 4 4 Setting the beeper frequency Press Press Press Press Press Press ...

Page 86: ...nimum 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 Figure 4 5 Setting the minimum frequency Press Press Press Press ...

Page 87: ...urrent 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 Figure 4 6 Setting the percentage scale readout Press Press Press ...

Page 88: ... 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 accept any commands from the host The annunciator flashes during the Print operation Figure 4 7 Setting the print mode for remote control Press Press Press ...

Page 89: ...s the return of characters to a PC in remote communication which is useful when developing PC programs with SCPI commands Figure 4 8 Setting the echo mode for remote control NOTE This mode is for internal use by Keysight Technologies only During normal operation it is recommended that you disable this function Press Press Press ...

Page 90: ... Service Guide 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 Figure 4 9 Setting the data bit for remote control Press Press Press ...

Page 91: ...ysight U1401B User s and Service Guide 91 Setting the parity check The parity check for remote communication with a PC can be set to either none even or odd Figure 4 10 Setting the parity check for remote control Press Press Press Press ...

Page 92: ... U1401B User s and Service Guide 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 Figure 4 11 Setting the baud rate for remote control Press Press Press Press Press ...

Page 93: ...ng 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 Figure 4 12 Setting the display backlight timer Press Press Press Press Press ...

Page 94: ...ic recording mode is activated The 1 ms peak hold mode is activated The auto power off feature has been disabled in the setup mode 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 used for a long period of time you may want to disable the auto po...

Page 95: ...Changing the Default Settings 4 Keysight U1401B User s and Service Guide 95 Figure 4 13 Setting the auto power off mode Press Press Press Press Press ...

Page 96: ...4 Changing the Default Settings 96 Keysight U1401B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 97: ...mA Output 100 Measuring a Pressure Transducer 104 Zener Diode Test 106 Diode Test 108 Bipolar Junction Transistor BJT Test 110 Junction Field Effect Transistor JFET Switch Test 116 Operational Amplifier Verification 120 2 Wire Transmitter Verification 125 Frequency Transmitter Verification 127 This chapter describes some application examples for the U1401B ...

Page 98: ...igator leads into the positive and negative output terminals respectively 3 Connect the red and black alligator clips to the current loop Make sure that the polarity is correct 4 Press SHIFT to access the shifted operations of the keypad The annunciator will appear on the display 5 Set the output level at 08 000 mA to get a 25 scale readout for 4 mA to 20 mA 6 Press OUTPUT to start the source outp...

Page 99: ...Application Examples 5 Keysight U1401B User s and Service Guide 99 Figure 5 1 Testing a 4 mA to 20 mA current loop with the source mode Red Black ...

Page 100: ...onnect the black alligator lead between the COM terminal of the loop source and the negative terminal of the measurement device on the current loop 4 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 5 Set the current level of the calibrator between 0 mA and 20 mA Do not set a...

Page 101: ...ion Examples 5 Keysight U1401B User s and Service Guide 101 Figure 5 2 mA output simulation CAUTION Do not apply an external voltage exceeding 30 V across the output terminals of the instrument Red Yellow Black ...

Page 102: ... one of the or positions 2 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 103 3 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 4 Set the current...

Page 103: ...es 5 Keysight U1401B User s and Service Guide 103 Figure 5 3 Use the yellow test lead to perform the 2 wire transmitter simulation Yellow Black Always use yellow test lead to perform mA simulation Input Excitation source ...

Page 104: ...eads to the positive and negative input terminals respectively 3 Probe the test points Figure 5 4 on page 105 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 5 PSIG 50 mV 0 PSIG to 15 PSIG 100 mV 0 PSIG to 30 PSIG 80 mV 0 PSIG to 60 PSIG 60 mV 0 PSIG to 100 PSIG 100 mV 0 PSIG ...

Page 105: ...Application Examples 5 Keysight U1401B User s and Service Guide 105 Figure 5 4 Pressure transducer measurement White Green Lead wires 1 Red V 2 White Out 3 Black V 4 Green Out ...

Page 106: ...3 Connect the black alligator lead between the negative output terminal and the negative cathode side of the zener diode 4 Connect the red and black probe leads to the input terminals 5 Output a constant current of 1 mA then measure the forward voltage of the zener diode 6 Output a constant current of 1 mA then measure the breakdown voltage of the zener diode CAUTION To avoid damaging the instrume...

Page 107: ...Application Examples 5 Keysight U1401B User s and Service Guide 107 Figure 5 5 Zener diode test ...

Page 108: ... anode side of the diode with the red lead and the negative cathode side with the black lead 4 Reverse the probe leads and measure the voltage across the diode again 5 If the diode is 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 Shorted A volt...

Page 109: ...Application Examples 5 Keysight U1401B User s and Service Guide 109 Figure 5 6 Diode test Forward bias Red Reverse bias Red Black Black ...

Page 110: ... 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 BJT with TO 92 package as shown in Figure 5 7 Figure 5 7 TO 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 th...

Page 111: ... 5 3 Table 5 4 and Table 5 5 Vbe is always greater than Vbc 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 2 Base terminal according to probe test Pin Probe Base Red Black Black Red 1 2 OL OL 3 1 3 OL OL 2 2 3 OL OL 1 Table 5 3 Polarity and terminals if Pin 3 is the base Test leads Pins Te...

Page 112: ...the base Test leads Pins Terminals Vbe Vbc Type 2 1 2 3 Red Black 0 6749 V 0 6723 V EBC NPN 0 6723 V 0 6749 V CBE NPN Black Red 0 6749 V 0 6723 V EBC PNP 0 6723 V 0 6749 V CBE PNP Table 5 5 Polarities and terminals if Pin 1 is the base Test leads Pins Terminals Vbe Vbc Type 1 2 1 3 Red Black 0 6749 V 0 6723 V BEC NPN 0 6723 V 0 6749 V BCE NPN Black Red 0 6749 V 0 6723 V BEC PNP 0 6723 V 0 6749 V B...

Page 113: ...or 2N3055 is used as an example to demonstrate how the polarity and terminals are identified According to the previous procedure pin 2 is the base Normally the case is the collector terminal 3 Table 5 6 Polarity and terminals if Pin 2 is the base Test leads Pins Terminals Vbe Vbc Type 2 1 2 3 Red Black 0 5702 V 0 5663 V EBC NPN ...

Page 114: ...ad the measured current value this is IC For PNP type BJT 1 Turn the rotary switch to the position 2 Connect the base to the positive output terminal 3 Connect the collector to the negative output terminal and the positive terminal of a DC power supply which supplies the required VDD 4 Connect the emitter to the negative input terminal 5 Connect the negative terminal of the DC power supply to the ...

Page 115: ...Application Examples 5 Keysight U1401B User s and Service Guide 115 Figure 5 9 Determining transistor hfe hfe IC IB 152 IB Current source hfe IC IB 300 IC Meter reading ...

Page 116: ...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 Figure 5 10 TO 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...

Page 117: ... 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 kΩ resistor and connect the black output alligator lead to the black input probe lead If RDS increases when VGS is a negative value then it is an n channel JFET On the other hand if RDS increases when VGS is a positive value then it is a p channel JFET Table 5 7 ...

Page 118: ...onnect the red output alligator lead to the gate terminal through a 100 kΩ resistor and connect the black output alligator lead to the black input probe lead 4 Gradually decrease the voltage output from 00 000 V to 15 000 V The RDS value will increase correspondingly Figure 5 11 on page 118 5 Observe at what point the resistance reading becomes OL the voltage bias level at that point would be the ...

Page 119: ...nnect the red output alligator lead to the gate terminal through a 100 kΩ resistor and connect the black output alligator lead to the black input probe lead 4 Gradually decrease the voltage output from 00 000 V to 15 000 V The RDS value will increase correspondingly Figure 5 12 on page 119 5 Observe at what point the resistance reading becomes OL the voltage bias level at that point would be the c...

Page 120: ...nverter 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 Iin If and Vo If x Rf Notice that the circuit provides the basis for an ideal current measurement it introduces zero voltage drop into the measurement circuit and the effective input impedance of the circuit as meas...

Page 121: ...B output current from 00 000 mA to 12 000 mA while monitoring the output voltage of the operational amplifier The Vo value will increase correspondingly from around 00 000 V to around 12 000 V The actual Vo is influenced by the tolerance of the feedback resistor and the offset of the operational amplifier Figure 5 13 Current to voltage converter Constant current output DC voltage measurement Vo If...

Page 122: ...ve 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...

Page 123: ...egral 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 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 124 4 Use a DC power supply with 15 V and 15 V outputs to power the oper...

Page 124: ...ide 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 Figure 5 15 Square wave to triangular wave conversion e ...

Page 125: ...ve output terminal of the instrument and the positive output terminal of the two wire transmitter Refer to Figure 5 16 on page 126 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 supp...

Page 126: ...5 Application Examples 126 Keysight U1401B User s and Service Guide Figure 5 16 Verifying a two wire transmitter Red Black ...

Page 127: ...ments 3 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 5 Connect the alligator leads between the output terminals of the U1401B and the input terminals of the transducer Make sure the polarity is correct 6 Press OUTPUT to output the signal 7 Read the display Check the measured cu...

Page 128: ...5 Application Examples 128 Keysight U1401B User s and Service Guide Figure 5 17 Verifying a frequency transmitter ...

Page 129: ...Keysight U1401B Handheld Multi Function Calibrator Meter User s and Service Guide 129 6 Maintenance Maintenance 130 This chapter will help you troubleshoot the U1401B for faults ...

Page 130: ...ene 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 CAUTION Repairs or services which are not covered in this manual should only be performed by qualified person...

Page 131: ...edures 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 3 It is recommended that you replace all the batteries 4 To close the battery cover reverse the procedures above WARNING The batteries contain nickel metal hydride and must be recycled or disposed off properly Remove all test leads and exter...

Page 132: ...6 Maintenance 132 Keysight U1401B User s and Service Guide Figure 6 1 Battery replacement Loosen the screw Slide the cover to the left side Replace all batteries ...

Page 133: ...atteries 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 WARNING 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 NOTE A new rechargeable battery comes in a discharged condition and must be charged befo...

Page 134: ...hree 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 External AC adapter jack Charging indication Green Full...

Page 135: ... 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 Figure 6 3 Fuse replacement Table 6 1 Fuse specifications Fuse Keysight part number Rating Size Type 1 2110 1464 630 mA 250 V 5 mm x 20 mm Fast blow ceramic type 2 2110 1463 63 mA 250 V 5 mm x 20 mm Slow blow UL VDE Fuse...

Page 136: ... still does not function check to ensure that you have followed the operating procedures given in this instruction manual before considering servicing the instrument When servicing the instrument use only the specified replacement parts Table 6 2 will assist you in identifying some of the basic problems WARNING To avoid electrical shock do not perform any servicing unless you are qualified to do s...

Page 137: ...re low Check the position of the slide switch Set it to the M S position Check the external load to see whether the rated limit is exceeded 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 Check fuse 2 No charging indication Set the slide switch to the CHARGE position Check the external adapter to see whet...

Page 138: ...e instrument model number and serial number NOTE You may find the latest U1401B parts list in the Keysight Test and Measurement Parts Catalog http www keysight com find parts NOTE Not all parts listed are available as field replaceable parts 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...

Page 139: ...ce Guide 139 7 Performance Tests and Calibration Calibration Overview 140 Recommended Test Equipment 142 Performance Verification Tests 143 Adjustment Considerations 148 Adjustment Procedures 149 This chapter contains the performance test procedures and adjustment procedures ...

Page 140: ...w 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 interv...

Page 141: ... 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 Calibration or verification tests should be performed under laboratory conditions where the ambient temperat...

Page 142: ...mmended test equipment Application Recommended equipment Recommended accuracy requirements DC Voltage Fluke 5520A 1 5 instrument 1 year spec DC Current Fluke 5520A 1 5 instrument 1 year spec Resistance Fluke 5520A 1 5 instrument 1 year spec AC Voltage Fluke 5520A 1 5 instrument 1 year spec AC Current Fluke 5520A 1 5 instrument 1 year spec Frequency Keysight 33250A 1 5 instrument 1 year spec Temper...

Page 143: ...onnect the positive ends of input and output together 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 is for reference only Refer to Chapter 8 Characteristics and Specifications on page 157 for the detailed specifications Table 7 2 Func...

Page 144: ...to 5520A Range 5520A output Error from nominal 1 year 1 Turn the rotary switch to mV Press to select DC Connect the Normal Hi Low output terminals of the calibrator to the U1401B input terminals 50 mV 0 05 V 75 µV 0 05 V 75 µV 500 mV 0 5 V 0 2 mV 0 5 V 0 2 mV Turn the rotary switch to Press to select DC 5 V 5 V 2 mV 5 V 2 mV 50 V 50 V 20 mV 50 V 20 mV 250 V 250 V 0 125 V 250 V 0 125 V 2 Turn the r...

Page 145: ...mVrms 5 Vrms 20 kHz 77 mVrms 50 V 50 Vrms 45 Hz 0 37 Vrms 50 Vrms 5 kHz 0 37 Vrms 50 Vrms 20 kHz 0 77 Vrms 250 V 250 Vrms 45 Hz 1 95 Vrms 250 Vrms 5 kHz 1 95 Vrms 250 Vrms 20 kHz 3 95 Vrms 3 Turn the rotary switch to Press to select frequency Connect the Normal Hi Low output terminals of the calibrator to the U1401B input terminals 100 Hz 10 Hz 16 mV 5 mHz 100 kHz 20 kHz 16mV 7 Hz 200 kHz 200 kHz ...

Page 146: ...nect the AUX Hi Low output terminals of the calibrator to the U1401B input terminals 0 05 A 0 045 A 18 5 µA 0 5 A 0 45 A 0 185 mA 7 Turn the rotary switch to Press to select AC Connect the AUX Hi Low output terminals of the calibrator to the U1401B input terminals 0 05 A 0 005 A 1 kHz 50 µA 0 045 A 1 kHz 0 29 mA 0 5 A 0 05 A 50 Hz 0 5 mA 0 45 A 60 Hz 2 9 mA 8 Turn the rotary switch to Connect a di...

Page 147: ...ameter U1401B output Nominal error within 1 year 1 Turn the rotary switch to any one of the positions Connect the U1401B output terminals to the 34405A Multimeter 1 5000 V 1 5 V 0 75 mV 0 V 0 3 mV 1 5 V 0 75 mV 15 000 V 15 V 7 5 mV 0 V 3 mV 15 V 7 5 mV 2 Turn the rotary switch to any one of the positions Connect the U1401B output terminals to the 34405A Multimeter 25 000 mA 25 mA 12 5 µA 25 mA 12 ...

Page 148: ...ure 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 en...

Page 149: ... position as shown in the adjustment table 6 The primary display will show the corresponding reference value of the Cal item 7 Configure each Cal item 8 Use the or 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 input voltage that is needed press the HOLD button to switch between the Offset a...

Page 150: ...mV Turn the rotary switch to Press to select DC 5 V Short Dual banana plug with copper wire shorted between 2 terminals Short 4 5 V 4 5 V 4 5000 V 50 V Short Dual banana plug with copper wire shorted between 2 terminals Short 45 V 45 V 45 000 V 500 V Short Dual banana plug with copper wire shorted between 2 terminals Short 450 V 450 V 450 00 V 1000 V Short Dual banana plug with copper wire shorted...

Page 151: ...ana plug with copper wire shorted between 2 terminals Short 450 Ω 450 Ω 450 00 Ω 5 kΩ Short Dual banana plug with copper wire shorted between 2 terminals Short 4 5 kΩ 4 5 kΩ 4 5000 kΩ 50 kΩ Short Dual banana plug with copper wire shorted between 2 terminals Short 45 kΩ 45 kΩ 45 000 kΩ 500 kΩ Short Dual banana plug with copper wire shorted between 2 terminals Short 450 kΩ 450 kΩ 450 00 kΩ 5 MΩ Shor...

Page 152: ...on 50 MΩ Short Dual banana plug with copper wire shorted between 2 terminals Short 30 MΩ 30 MΩ 30 000 MΩ 15 MΩ 15 MΩ 15 000 MΩ 4 Turn the rotary switch to Diode Short Dual banana plug with copper wire shorted between 2 terminals Short 1 9 V 1 9 V 1 9000 V 5 Turn the rotary switch to position Press to select DC 50 mA 5 mA 5 000 mA 45 mA 45 000 mA 500 mA 50 mA 50 00 mA 450 mA 450 00 mA 6 Turn the ro...

Page 153: ...dary display will show CAL 0 and rdy respectively Connect the output terminals to a multimeter refer to Table 7 1 on page 142 for the recommended test equipment 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 CAL 1 1 Press MODE The primary and secondary displays show CAL 1 and rdy res...

Page 154: ...splays show the output voltage value and 00000 respectively which means the present output level is as shown on the primary display 3 Press or 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 At the end of the last calibration step the primary display will show PASS after the MODE button ...

Page 155: ...ation 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 or to adjust the output current until the multimeter reading is the same as the value shown on the primary display 4 Pre...

Page 156: ...7 Performance Tests and Calibration 156 Keysight U1401B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 157: ...eter User s and Service Guide 157 8 Characteristics and Specifications For the characteristics and specifications of the U1401B Handheld Multi Function Calibrator Meter refer to the datasheet at http literature cdn keysight com litweb pdf 5990 3459EN pdf ...

Page 158: ...8 Characteristics and Specifications 158 Keysight U1401B User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 159: ...on is subject to change without notice Always refer to the Keysight website for the latest revision Keysight Technologies 2009 2017 Edition 15 July 28 2017 Printed in Malaysia U1401 90055 U1401 90055 www keysight com ...

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