Agilent Technologies U1251A 6 Performance Tests and Calibration

111

Agilent Technologies

Agilent U1251A and U1252A Handheld Digital Multimeter

User’s and Service Guide

6 Performance Tests and Calibration

Calibration Overview 112

Closed-case electronic calibration 112

Agilent Technologies calibration services 112

Calibration interval 113

Adjustment is recommended 113

Recommended Test Equipment 114

Basic Operating Test 115

Backlit test 115

Testing the display 115

Current terminal test 116

Charge terminal alert test 117

Test Considerations 118

Calibration Security 119

Performance Verification Tests 120

Unsecuring the instrument for calibration 128

Calibration process 131

Using the front panel for adjustments 132

Adjustments Consideration 133

Valid adjustment input values 134

Adjustment procedure 135

Finishing the adjustment 142

Calibration errors 143

This chapter contains the performance test and the

adjustment procedure.

Contents

Main Notices Manual Part Number Edition Technology Licenses Restricted Rights Legend Safety Symbols Page Page Page Agilent U1251A/U1252A Users and Service Guide VII Regulatory Markings Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC Do not dispose in domestic household waste In This Guide Page Contents 1 Getting Started 2 Making Measurements 3 Functions and Features 4 Changing The Default Setting 5 Maintenance 6 Performance Tests and Calibration 7 Specifications Page Page List of Figures Page List of Tables Page 1 Getting Started Introducing the U12521A/U1252A Handheld Digital Multimeter Check the shipment Adjusting the tilt-stand Page Page The rear panel at a glance The rotary switch at a glance The keypad at a glance 10 Agilent U1251A/U1252A Users and Service Guide 1 Getting Started Tutorial The display at a glance 12 Agilent U1251A/U1252A Users and Service Guide 1 Getting Started Tutorial Tabl e 1 -3 General display symbols Page Page Page Selecting display with the Hz button V Page Selecting display with the Dual button V Page Selection display with the Shift button V Page The terminals at a glance 2 Making Measurements Understanding The Measurement Instructions Measuring Voltage Measuring AC voltage Page Measuring Current A & mA measurement Page Percentage scale of 4 mA to 20 mA Page A (ampere) measurement Frequency Counter Page Measuring Resistance, Conductance and Testing Continuity Page Audible continuity Conductance Page Tes ti ng Dio de s Page Page Measuring Capacitance Page Measuring Temperature Page Page Page Alerts and Warning During Measurement Overload alert Input warning Charge terminal alert 3 Functions and Features Dynamic Recording Page Data Hold (Trigger Hold) Refresh Hold Page Null (Relative) Page Decibel Display Page 1 ms Peak Hold Page Data Logging Manual logging Page Interval logging Page Reviewing logged data Page Square Wave Output (for U1252A) Page Page Page Remote Communication Page 4 Changing The Default Setting Selecting Setup Mode Changing The Default Setting 4 Agilent U1251A/U1252A Users and Service Guide 75 Table 4-1 Available setting options in Setup mode 76 Agilent U1251A/U1252A Users and Service Guide 4 Changing The Default Setting Table 4-1 Available setting options in Setup mode (continued) Setting Data Hold/Refresh Hold Mode Setting Data Logging Mode Page Setting Reference Impedance for dBm Measurement Setting Minimum Frequency Measurement Setting Temperature Unit Page Setting Auto Power Saving Mode Page Page Setting Beep Frequency Setting Backlight Timer Setting Baud Rate Setting Parity Check Page Page Setting Print Mode Press Returning to Default Factory Settings Press 5 Maintenance Introduction General maintenance Battery replacement Page Storage considerations Charging the battery Page Page Page Page Page Page Fuse checking procedure Replacing the fuse Page Troubleshooting Replaceable Parts To order replaceable parts Page 6 Performance Tests and Calibration Calibration Overview Closed-case electronic calibration Agilent Technologies calibration services Calibration interval Adjustment is recommended Recommended Test Equipment Basic Operating Test Current terminal test Charge terminal alert test Test Considerations Calibration Security Performance Verification Tests Agilent U1251A/U1252A Users and Service Guide 121 Tabl e 6 -2 Performance verification test steps Error from nominal 1 year 122 Agilent U1251A/U1252A Users and Service Guide Error from nominal 1 year Agilent U1251A/U1252A Users and Service Guide 123 Error from nominal 1 year 124 Agilent U1251A/U1252A Users and Service Guide Error from nominal 1 year Agilent U1251A/U1252A Users and Service Guide 125 Error from nominal 1 year 126 Agilent U1251A/U1252A Users and Service Guide Error from nominal 1 year Page Unsecuring the instrument for calibration To Un se cu re t he In st rum ent from the Front Panel To change the instrument calibration security code from the front panel To unsecure the instrument without the security code Calibration process Using the front panel for adjustments Selecting the Adjustment Mode Entering Adjustment Values Adjustments Consideration Valid adjustment input values V Adjustment procedure Page Agilent U1251A/U1252A Users and Service Guide 137 Tabl e 6 -4 Adjustment table 138 Agilent U1251A/U1252A Users and Service Guide Agilent U1251A/U1252A Users and Service Guide 139 140 Agilent U1251A/U1252A Users and Service Guide Agilent U1251A/U1252A Users and Service Guide 141 Finishing the adjustment To read the calibration count Calibration errors Page 7 Specifications 146 Agilent U1251A/U1252A Users and Service Guide Product Characteristics Agilent U1251A/U1252A Users and Service Guide 147 Page Measurement Category Measurement category definition Measurement CAT I Measurement CAT II Measurement CAT III Specification Assumptions Agilent U1251A/U1252A Users and Service Guide 151 Electrical Specifications DC Specifications Tabl e 7 -1 DC Accuracy (% of reading + Number of Least Significant Digit) 152 Agilent U1251A/U1252A Users and Service Guide Tabl e 7 -1 DC Accuracy (% of reading + Number of Least Significant Digit) (continued) Agilent U1251A/U1252A Users and Service Guide 153 AC Specifications AC specifications for U1251A Tabl e 7 -2 U1251A accuracy specifications (% of reading + number of LSD) for true RMS AC voltage Tabl e 7 -3 U1251A accuracy specifications (% of reading + number of LSD) for true RMS AC current 154 Agilent U1251A/U1252A Users and Service Guide AC specifications for U1252A Tabl e 7 -4 U1252A accuracy specifications (% of reading + number of LSD) for true RMS AC voltage Tabl e 7 -5 U1252A accuracy specifications (% of reading + number of LSD) for true RMS AC current Agilent U1251A/U1252A Users and Service Guide 155 AC+DC Specifications for U1252A Tabl e 7 -6 U1252A true RMS ac+dc voltage specifications Tabl e 7 -7 U1252A true RMS ac+dc current specifications 156 Agilent U1251A/U1252A Users and Service Guide Capacitance Specifications Temperature Specifications Tabl e 7 -8 Capacitance specifications Tabl e 7 -9 Temperature specifications Frequency Specifications Duty Cycle and Pulse Width Specifications Table 7-10Frequency specifications Table 7-11Duty cycle and pulse width specifications Frequency Sensitivity Specifications For voltage measurements Table 7-12Frequency sensitivity and trigger level specificati ons for voltage measurements For current measurements Peak Hold Specifications 160 Agilent U1251A/U1252A Users and Service Guide Frequency Counter Specifications for U1252A Table 7-15Frequency counter (divide by 1) specifications Table 7-16Frequency counter (divide by 100 [4]) specificati ons Agilent U1251A/U1252A Users and Service Guide 161 Square Wave Output for U1252A Table 7-17Square wave output specifications Operating Specifications Display update rate (approximate) Agilent U1251A/U1252A Users and Service Guide 163 Input impedance Table 7-19Input Impedance Page Printed in Malaysia Tenth Edition, May 4, 2012 U1251-90003 www.agilent.com Contact us T