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Keysight U1211A User's And Service Manual

Clamp meters
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Keysight U1211A, U1212A,
and U1213A Clamp Meters
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  • Page 1 Keysight U1211A, U1212A, and U1213A Clamp Meters User’s and Service Guide...

  • Page 2: Safety Information

    Limited Rights as defined in FAR 27.401 or DFAR notice until the indicated conditions are 227.7103-5 (c), as applicable in any fully understood and met. technical data. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 3: Safety Symbols

    Application around and removal from Category III 1000 V overvoltage CAT III HAZARDOUS LIVE conductors is 1000 V protection permitted Category IV 600 V overvoltage CAT IV 600 V protection Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 4: General Safety Information

    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. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 5 – Do not substitute parts or modify equipment to avoid the danger of WARNING 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.

  • Page 6: Measurement Category

    Measurement Category The Keysight U1211A, U1212A, and U1213A has a safety rating of CAT III, 1000 V and CAT IV, 600 V. Measurement CAT I Measurements performed on circuits not directly connected to the AC mains. Examples are measurements on circuits not derived from the AC mains and specially protected (internal) mains-derived circuits.

  • Page 7: Environmental Conditions

    Maximum 80% RH for temperature up to 31 °C decreasing linearly Relative humidity to 50% RH at 50 °C Altitude (operating) 2000 meters Storage temperature –20 °C to 60 °C Storage humidity 0% to 80% RH non-condensing Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 8: Regulatory Markings

    This affixed Canadian ICES-001. product label indicates that you must Cet appareil ISM est conforme a la not discard this electrical or norme NMB-001 du Canada. electronic product in domestic household waste. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 9: Waste Electrical And Electronic Equipment (Weee) Directive 2002/96/Ec

    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 links on the following Keysight websites: – www.keysight.com/find/clampmeter (product-specific information and support, software and documentation updates) –...
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  • Page 11: Table Of Contents

    ......46 Performing Temperature Measurement ......48 Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 12 ........84 Closed-case electronic calibration ......84 Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 13 ......... . .115 Characteristics and Specifications Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
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  • Page 15: List Of Figures

    Full segments of annunciator display ... . .87 Figure 6-2 Current performance verification test setup ..93 Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 16 ....108 Figure 6-4 Displaying adjustment counts ....114 Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 17 ....112 Table 6-11 Error codes and their respective meanings ..115 Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
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  • Page 19 Keysight U1211A, U1212A, and U1213A Clamp Meters User’s and Service Guide Getting Started Introduction Initial Inspection Product at a Glance This chapter contains a brief introduction and description of the front panel, display, buttons, and terminals on the Keysight U1211A, U1212A, and U1213A Clamp Meters.

  • Page 20: Getting Started

    Getting Started Introduction The Keysight U1211A, U1212A, and U1213A Clamp Meters are true RMS handheld clamp meters that enables you to measure harmonic currents accurately. Besides measuring current, the clamp meters are combined with built-in multimeter measurement features to enable other measurements associated to a multimeter.

  • Page 21: Features

    Getting Started Features The key features of Keysight U1211A, U1212A, and U1213A Clamp Meters are: – AC, DC, and AC+DC (for U1213A only) voltage and current measurements. – True RMS measurement for both AC voltage (ACV) and AC current (ACA).

  • Page 22: Initial Inspection

    Keep the original packaging in case the clamp meter has to be returned to Keysight in the future. If you return the clamp meter for service, attach a tag identifying the owner and model number. Also, include a brief description of the problem occurred.

  • Page 23: Product At A Glance

    The front panel at a glance markings Clamp jaw Hand guard Hold/ Max Min button Rotary Handle switch Front panel Annunciator Function buttons Black input Red input terminal terminal Figure 1-2 Clamp meter front panel Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 24: The Annunciator Display At A Glance

    Figure 1-3 LCD annunciator display with full segments displayed The U1211A, U1212A, and U1213A clamp meters annunciator display indicates the measurement values, functions, and status of the clamp meter. To view the full display (with all segments illuminated), press and hold Hold/Max Min while rotating the rotary switch to ~A on the clamp meter.
  • Page 25 Duty cycle (for U1213A only) Frequency measurement unit Secondary display (for frequency and duty cycle measurement, and temperature unit) Analog bar-graph with scale indicator Auto power-off enabled Negative polarity Primary display Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 26: Table 1-2 Analog Bar-Graph Ranges

    Each segment of the analog bar-graph is represented by a count of 100. Table 1-2 Analog bar-graph ranges Measurement range Bar-graph d isplay 0 to 1000 1000 to 2000 2000 to 3000 3000 to 4000 Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 27: The Buttons At A Glance

    Press and hold Hold/Max Min for more than 1 second to disable dynamic recording function. In Setup mode, the Hold/Max Min button is designated as a Save button. See “Selecting Setup Menu” on page 64 for more information. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 28: Figure 1-5 Function And Status Buttons

    – Press Hz/%/ momentarily again (after enabling frequency measurement) to perform duty cycle (%) function. – Press Hz/%/ for more than 1 second to enable backlight illumination. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 29 – Press Range/Auto for more than 1 second to enable automatic range detection (except diode and capacitance measurement). Press Range/Auto momentarily to disable automatic range detection. [a] The duty cycle function is only available for U1213A clamp meter. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 30: The Rotary Switch At A Glance

    Diode or capacitance measurement. By default, measurement is set to diode measurement. [a] The temperature measurement and DC current measurement are only available for U1212A and U1213A clamp meters. [b] The AC + DC measurement is only available for U1213A clamp meter. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 31: The Terminals At A Glance

    < 0.3 A Diode Temperature [a] DC current measurement is only available for U1212A and U1213A clamp meters. [b] Temperature function is only available for U1212A and U1213A clamp meters. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 32: The Clamp Jaw At A Glance

    Current is measured accurately by placing the conductor in the middle of the 3 jaw markings. See “Performing Current Measurement” page 36 for more information on performing current measurements. Figure 1-8 Clamp jaw close and open state Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 33: The Rear Panel At A Glance

    Getting Started The rear panel at a glance markings Clamp jaw Hand guard Handle Back panel Battery cover Figure 1-9 Clamp meter rear panel Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 34 Getting Started THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 35: Making Measurements

    Performing Temperature Measurement This chapter contains many types of measurements that you can make with the U1211A, U1212A, and U1213A Clamp Meters, and how to make the connections for each measurement. Ensure that the terminal connections are correct for a particular WARNING measurement before making any measurement.

  • Page 36: Performing Current Measurement

    4 Clamp around a conductor and ensure that the conductor fits the markings on the jaw. 5 Read the display. Press Hz to view the frequency indication on the secondary display. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 37: Figure 2-1 Measuring Current

    Making Measurements Conductor Read Press Figure 2-1 Measuring current Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 38: Performing Voltage Measurement

    3 Press Shift to switch between AC voltage, DC voltage, and AC + DC voltage (for U1213A only) measurements. 4 Probe the test points and read the display. Press Hz to view the frequency indication on the secondary display. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 39: Figure 2-2 Measuring Voltage

    Making Measurements Probe and read Press Connect Figure 2-2 Measuring voltage Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 40: Performing Resistance Measurement And Continuity Test

    3 Probe the test points (by shunting the resistor) and read the display. 4 To perform continuity test, press Shift once (see Figure 2-4 on page 42). The buzzer will sound when the resistance is below 10.0 Ω. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 41: Figure 2-3 Measuring Resistance

    Making Measurements Probe and read Connect Figure 2-3 Measuring resistance Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 42: Figure 2-4 Continuity Test

    Making Measurements Probe and read Connect Figure 2-4 Continuity test Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 43: Performing Diode Measurement

    – A diode is considered open if the clamp meter displays “OL” in both forward and reverse bias modes. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 44: Figure 2-5 Measuring Diode (Forward Bias)

    Making Measurements Probe and read Connect Figure 2-5 Measuring diode (forward bias) Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 45: Figure 2-6 Measuring Diode (Reverse Bias)

    Making Measurements Probe and read Connect Figure 2-6 Measuring diode (reverse bias) Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 46: Performing Capacitance Measurement

    To confirm that a capacitor has fully discharged, use the DC voltage function. The U1211A, U1212A, and U1213A Clamp Meter measures capacitance by charging a capacitor with a known current for a period of time, and then measuring the voltage.

  • Page 47: Figure 2-7 Measuring Capacitance

    Making Measurements Probe Press and read Connect Figure 2-7 Measuring capacitance Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 48: Performing Temperature Measurement

    3 Connect the thermocouple adapter (with the thermocouple probe connected to it) into input terminals (red) and COM (black). 4 Touch the measurement surface (device under test) with the thermocouple probe and read the display. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 49: Figure 2-8 Measuring Temperature

    Making Measurements Press Probe and read Connect Figure 2-8 Measuring temperature Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 50 Making Measurements THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 51 Keysight U1211A, U1212A, and U1213A Clamp Meters User’s and Service Guide Functions and Features Data Hold (Trigger Hold) Refresh Hold Dynamic Recording 1 ms Peak Hold Null (Relative) This chapter contains detailed information on functions and features available in the U1211A, U1212A, and U1213A Clamp Meters.

  • Page 52: Data Hold (Trigger Hold)

    3 The annunciator display will indicate DH and the data hold function is enabled. 4 Press Hold/Max Min again to trigger. 5 Press Hold/Max Min for more than 1 second to exit the data hold operation. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 53: Figure 3-1 Data Hold Operation

    Functions and Features Press Press Press Press Blinking Blinking to trigger to trigger After a stable After a stable reading occurs reading occurs Figure 3-1 Data hold operation Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 54: Refresh Hold

    The value held earlier will be updated until the measuring value is stable. 4 Press Hold/Max Min for more than 1 second to exit the refresh hold operation. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 55: Figure 3-2 Refresh Hold Operation

    If the reading is unable to reach a stable state (when exceeding the preset NOTE variation), the reading value will not be updated. Press Variation counts Blinking > settings After a stable reading occurs Press Figure 3-2 Refresh hold operation Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 56: Dynamic Recording

    – If the dynamic recording mode is enabled with auto range, the value of MAX, MIN, and AVG for different ranges will be recorded. – During the dynamic recording mode, the auto power-off feature is automatically disabled. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 57 – Max: maximum reading since the dynamic recording mode was enabled – Min: minimum reading since the dynamic recording mode was enabled – Avg: true average of all readings since the dynamic recording mode was enabled Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 58: Figure 3-3 Dynamic Recording Mode

    Functions and Features Press > 1 second Press Press > 1 second Press Press > 1 second Press Press > 1 second Press Figure 3-3 Dynamic recording mode Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 59: Ms Peak Hold

    – If the reading is “OL”, press Range/Auto to change the measurement range NOTE and to restart peak-recording measurement. – If you need to restart peak recording without changing the range, press Shift/Peak. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 60: Figure 3-4 1 Ms Peak Hold Mode Operation

    Functions and Features Press for > 1 second Processing... Press Press for > 1 second Figure 3-4 1 ms peak hold mode operation Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 61: Null (Relative)

    – When selecting DC current measurement, the primary display will indicate a non-zero DC current value residual magnetism of the jaw and internal sensor effects. Press to zero-adjust the display without clamping any conductor. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 62: Figure 3-5 Null (Relative) Mode Operation

    Functions and Features Press Press enable null Blinking exit relative mode operation Press for relative base Figure 3-5 Null (relative) mode operation Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 63: Changing The Default Settings

    Default Factory Settings and Available Setting Options This chapter describes the various items and settings in the setup menu. This chapther also describes how to change the default factory settings of the U1211A, U1212A, and U1213A Clamp Meters and other available setting options.

  • Page 64: Selecting Setup Menu

    Table 4-1 Setup mode buttons operation Setup mode buttons Description Save settings Navigation: Left arrow Toggle: Down arrow Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 65 3 Press Hold/Max Min to save the changes you have made. 4 Press Shift/Peak for more than 1 second to exit the setup mode. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 66: Default Factory Settings And Available Setting Options

    – To make AC measurement as the initial measurement, select AC. – To make DC measurement as the initial measurement, select dC. Note: – The default initial measurement of U1211A, U1212A, and U1213A is AC measurement. Default factory settings. rESt Select REST to reset the clamp meter to its default factory settings.
  • Page 67 – °C: Single display, in °C only. °C – °F: Single display, in °F only. – °C/°F: Dual display, °C in primary display, °F in secondary. – °F/°C: Dual display, °F in primary display, °C in secondary. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 68: Setting Minimum Frequency Measurement

    The typical measurement rate as defined in the general specifications is based on a minimum frequency of 10 Hz. Press Initial Press Press Press Press Press Press Press Figure 4-1 Setting the minimum frequency Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 69: Setting Beep Frequency

    The beep frequency can be set to 4800 Hz, 2400 Hz, 1200 Hz, or 600 Hz. OFF means the beep sound is disabled. Press Press Press Press Press Press Press Press Press Press Figure 4-2 Setting the beep frequency Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 70: Setting Data Hold/Refresh Hold Mode

    Press Press Press Press edit the value at a step of 100 Press Figure 4-3 Setting the data hold or refresh hold mode Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 71: Setting Auto Power-Off Mode

    OFF position. Press to edit the value Initial Press Press Press to edit the value Press Press Figure 4-4 Setting the auto power-off duration Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 72: Setting Backlight Power-On Duration

    OFF means the backlight will not turn off automatically. Press to edit the value Initia Press Press Press to edit the value Press Press Figure 4-5 Setting the backlight power-on duration Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 73: Setting Temperature Unit

    – Fahrenheit only: °F single display. – Fahrenheit/Celcius: °F/°C dual display; °F on primary, and °C on secondary. Always set the temperature unit display for official requirements and comply NOTE with national law and standards. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 74: Figure 4-6 Setting The Temperature Unit

    Changing the Default Settings Press Press for more than 1 second to enable temperature unit menu item Press Press Press Press Press Press Press Figure 4-6 Setting the temperature unit Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 75: Returning To Default Factory Settings

    No other options are available in this menu item. Press Hold/Max Min to reset to default factory settings. The reset menu item automatically reverts to minimum frequency settings menu item. Press Figure 4-7 Reverting to default factory settings Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 76 Changing the Default Settings THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 77 User’s and Service Guide Maintenance General Maintenance Troubleshooting Replacement Parts This chapter will help you troubleshoot malfunctioning U1211A, U1212A, and U1213A Clamp Meters. Any repair or service which is not covered in this manual should only be CAUTION performed by qualified personnel.

  • Page 78: Maintenance

    Prevent rust by wiping metal surfaces with oil from time to time. If rusted, lightly NOTE sand the affected area with very fine sandpaper and then oil the metal surfaces. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 79: Battery Replacement

    3 Loosen the screw on the battery cover. 4 Lift the battery cover slightly, then pull the battery cover upwards. 5 Replace the specified battery. 6 Reverse the procedures above to close the cover. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 80: Figure 5-1 Replacing The Battery In The Clamp Meter

    Maintenance Loosen screw Lift battery cover Pull upwards Figure 5-1 Replacing the battery in the clamp meter Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 81: Troubleshooting

    Check battery. Replace battery if necessary. No beeper tone Check the setup mode menu to verify whether the beeper function has been set to off. If so, select the desired driving frequency. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 82: Replacement Parts

    U1212A, and U1213A Clamp Meters. Table 5-2 includes a brief description of each replacement part with its corresponding part number. You may find the latest U1211A, U1212A, and U1213A Clamp Meters parts list in NOTE the Keysight Test and Measurements Parts Catalog (http://www.keysight.com/...
  • Page 83 Front Panel Calibration This chapter contains the performance test and adjustment procedures. The performance test procedure verifies that the U1211A, U1212A, and U1213A Clamp Meters are operating within its published specifications. The adjustment procedure ensures that the clamp meter remains within the specifications until the...

  • Page 84: Performance Tests And Calibration

    The non-volatile EEPROM calibration memory is retained when the power is off. Keysight Technologies calibration services When your instrument is due for calibration, contact your local Keysight Service Center for a low-cost recalibration. Calibration Interval A 1-year interval is adequate for most applications. Accuracy specifications are warranted only if adjustment is made at regular calibration intervals.

  • Page 85: Adjustment Recommendation

    Keysight recommends that re-adjustment should be performed during the calibration process for best performance. This will assure that the U1211A, U1212A, and U1213A clamp meters will remain within the specifications for the next calibration interval. This criterion for the re-adjustment provides the best long-term stability.

  • Page 86: Recommended Test Equipment

    Fluke 5520A and Fluke 5500A/COIL Resistance Fluke 5520A Capacitance Fluke 5520A Diode Fluke 5520A Temperature Fluke 5520A Short Shorting plug — dual banana plug with copper wire shorting the 2 terminals Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 87: Basic Operating Tests

    Compare the display with the example in Figure 6-1. Figure 6-1 Full segments of annunciator display Testing the backlight Press Hz/%/ for more than 1 second to carry out test on the backlight. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 88: Test Considerations

    Shielded twisted-pair PTFE interconnect cables of minimum length are recommended between the calibrator and the clamp meter. Cable shields should be grounded to earth. This configuration is recommended for optimal noise and settling time performance during calibration. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 89: Performance Verification Tests

    Performance Tests and Calibration Performance Verification Tests Use the following performance verification tests to verify the measurement performance of the U1211A, U1212A, and U1213A clamp meter. These performance verification tests are based on the specifications listed in the instrument data sheet.
  • Page 90 – ±0.013 V 40 V 40 V – – ±0.13 V 400 V 400 V ±2.5 V ±2.3 V ±1.3 V 1000 V 1000 V ±8 V ±8 V ±8 V Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 91: Table 6-2 Performance Verification Tests

    400 V, 45 Hz – – ±6.9 V 400 V, 2 kHz – – ±10.9 V 1000 V 1000 V, 45 Hz – – ±24 V 1000 V, 2 kHz – – ±34 V Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 92 ±12.3 A ±12.3 A ±12.3 A peak peak 60 Hz 60 Hz [a] The measurement option is only available for U1212A and U1213A. [b] The measurement option is only available for U1213A. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 93: Figure 6-2 Current Performance Verification Test Setup

    Performance Tests and Calibration 5520A calibrator 50-turn current coil AC or DC current >= 3 A AC or DC current < 3 A Figure 6-2 Current performance verification test setup Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 94: Functional Tests (Only For U1212A And U1213A)

    Table 6-3 DC current offset verification test Test function Range Reference input value Error limits DC current 40 A ±0.15 A [a] Null function turned on. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 95 6 Calculate the difference between the readings at position 1 and position 2. Check whether the difference falls within the specified error limits in Table 6-4. Otherwise, repair is recommended. Please contact Keysight Service Center for support. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 96 5520A output use Reference values Error limits with 5500A/COIL (Difference between read ing at position 1 and position 2) AC current 400 A 6 A, 50 Hz 300 A, 50 Hz ±0.5 A Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 97: Calibration Security

    The security code is stored in non-volatile memory, and does not change when the power is turned off. Table 4-1 on page 64 for the directional button operations to be used in the NOTE subsequent procedures below. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 98 5 Press Hold/Max Min to store the new calibration security code. If the new security code is successfully stored, the secondary display will indicate “PASS”. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 99 Now you can use 1234 as the security code. If you want to enter a new security code, see “Changing the instrument Calibration Security Code” on page 98. Ensure you record the new security code. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 100: Adjustment Considerations

    1 hour with the K-type thermocouple connected between the instrument and the calibration source. Never turn off the instrument during calibration. This may delete the CAUTION calibration memory for the present function. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 101: Valid Adjustment Reference Input Values

    0.9 to 1.1 × reference input value 4000 µF 3000 µF 0.9 to 1.1 × reference input value Diode Short SHORT 0 Ω 2.000 V 2.000 V 0.9 to 1.1 × reference input value Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 102 300.0 Ω 0.9 to 1.1 × reference input value Capacitance 400 µF 300.0 µF 0.9 to 1.1 × reference input value 4000 µF 3000 µF 0.9 to 1.1 × reference input value Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 103 100 V (70 Hz) 0.9 to 1.1 × reference input value 1000 V (70 Hz) 0.9 to 1.1 × reference input value 1000 V (2 kHz) 0.9 to 1.1 × reference input value Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 104: Table 6-7 U1213A Valid Adjustment Reference Input Values

    0.9 to 1.1 × reference input value 400 µF 300.0 µF 0.9 to 1.1 × reference input value 4000 µF 3000 µF 0.9 to 1.1 × reference input value Diode Short SHORT 0 Ω Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 105 0.9 to 1.1 × reference input value Short SHORT Short V and COM terminals 0.4 V 0.400 V 0.9 to 1.1 × reference input value K-type 000.0 °C Provide 0 °C with ambient compensation Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 106: Front Panel Calibration

    4 Set up the indicated reference input and apply this input to the correct terminals of the clamp meter. For example: – If the required reference input is “SHORT”, use a shorting plug to short the two relevant terminals. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 107 9 After calibrating all the functions, switch off the instrument and then switch it on again. The instrument will be back to normal measurement mode. You may also refer to “Typical adjustment process flow” on page 108. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 108 Press Press , or to set standard value start calibration Press start calibration If fail If pass After brief display After brief display Figure 6-3 Typical adjustment process flow Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 109 300.00 V (70 Hz) 300.00 V (2 kHz) 1000 V 100.0 V (70 Hz) 1000.0 V (70 Hz) 1000.0 V (2 kHz) DC voltage SHrt Short 400 V 300.0 V 1000 V 1000 V Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 110: Table 6-8 U1211A List Of Adjustment Items

    300.00 V (70 Hz) 300.00 V (2 kHz) 1000 V 100.0 V (70 Hz) 1000.0 V (70 Hz) 1000.0 V (2 kHz) DC voltage SHrt Short 400 V 300.0 V 1000 V 1000 V Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 111 400 Ω 300.0 Ω Capacitance 400 µF 300.0 µF 4000 µF 3000 µF Temperature Short SHrt 0.400 V 0.400 V K-type 000.0 °C Diode Short 0 Ω 2.000 V 2.000 V Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 112: Table 6-10 U1213A List Of Adjustment Items

    AC current 40 A 02.00 A (70 Hz) 30.00 A (70 Hz) 400 A 030.0 A (70 Hz) 300.0 A (70 Hz) 1000 A 50 A (70 Hz) 300 A (70 Hz) Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 113 3.000 µF 40 µF 30.00 µF 400 µF 300.0 µF 4000 µF 3000 µF Temperature Short SHrt 0.400 V 0.400 V K-type 000.0 °C Diode Short 0 Ω 2.000 V 2.000 V Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 114: Adjustment Count

    1 second to view the adjustment count. Press Shift/Peak for more than 1 second again to exit the adjustment count display. Press for > 1 second Figure 6-4 Displaying adjustment counts Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 115: Error Codes

    Secure code invalid E003 Serial number code invalid E004 Calibration aborted E005 Value out of range E006 Signal measurement out of range E007 Frequency out of range E008 EEPROM write failure Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 116 Performance Tests and Calibration THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...

  • Page 117: Specifications

    Keysight U1211A, U1212A, and U1213A Clamp Meters User’s and Service Guide Characteristics and Specifications For the characteristics and specifications of the U1211A, U1212A, and U1213A Clamp Meters, refer to the datasheet at http://literature.cdn.keysight.com/litweb/pdf/5990-5083EN.pdf.
  • Page 118 Characteristics and Specifications THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U1211A, U1212A, and U1213A User’s and Service Guide...
  • Page 119 This information is subject to change without notice. Always refer to the Keysight website for the latest revision. © Keysight Technologies 2009-2017 Edition 16, June 30, 2017 Printed in Malaysia *U1211-90001* U1211-90001 www.keysight.com...

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