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Keysight U1452A User Manual
Keysight U1452A User Manual

Keysight U1452A User Manual

Insulation tester
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Summary of Contents for Keysight U1452A

  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 Keysight U1452A/U1452AT/ U1451A Insulation Tester User’s Guide...
  • Page 3 Declaration of Conformity. and the DFARS and are set forth specifically in writing elsewhere in the WARNING EULA. Keysight shall be under no obligation to update, revise or A WARNING notice denotes a hazard. It otherwise modify the Software. With...
  • Page 4 1000 V protection Category IV 600 V overvoltage CAT IV Earth (ground) terminal 600 V protection Equipment protected throughout by Do not use in distribution systems with double insulation or reinforced voltages higher than 600 V insulation U1452A/U1452AT/U1451A User’s Guide...
  • Page 5 Safety Considerations Read the information below before using this tester. Model U1452A appears in all illustrations. – Do not use the tester if it is damaged. Before you use the tester, inspect WARNING the case. Look for cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors.
  • Page 6 – You are advised to use low leakage batteries when changing to new batteries. Please remember to remove the batteries when the tester is not in use for a long period of time. Warning on the risk of battery leakage. U1452A/U1452AT/U1451A User’s Guide...
  • Page 7 Measurement Category The Keysight U1452A/U1452AT/U1451A tester 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 8 – –40 °C to 70 °C, 0% to 80% RH (without batteries) Full accuracy up to 80% RH for temperatures up to 30 °C, Humidity decreasing linearly to 50% RH at 55 °C Altitude Up to 2,000 meters Pollution degree Pollution degree II U1452A/U1452AT/U1451A User’s Guide...
  • Page 9 The U1452A/U1452AT/U1451A Product Name complies with the following NOTE safety and EMC requirements: – Safety compliance – IEC 61010-1/EN61010-1, IEC 61010-2-030/EN61010-2-030, IEC61010-02-033/EN61010-2-033 – Canada: CAN/CSA C22.2 No. 61010-1, CAN/CSA-C22.2 No.61010-2-030, CAN/CSA-C22.2 No.61010-2-033 – USA: UL Std. No.61010-1, UL Std. No.61010-2-030, UL Std.
  • Page 10 Forty years is the expected useful life of the product. This symbol is a South Korean Class A EMC Declaration. This is a Class A instrument suitable for professional use and in electromagnetic environment outside of the home. U1452A/U1452AT/U1451A User’s Guide...
  • Page 11 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/insulationtesters (product-specific information and support, software and documentation updates) –...
  • Page 12 .........44 U1452A/U1452AT/U1451A User’s Guide...
  • Page 13 Editing numerical values ........85 U1452A/U1452AT/U1451A User’s Guide...
  • Page 14 ......100 Changing the button operation on the remote switch probe ..100 Changing the Dielectric Absorption Ratio (DAR) for IR tests ..101 Characteristics and Specifications U1452A/U1452AT/U1451A User’s Guide...
  • Page 15 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1452A/U1452AT/U1451A User’s Guide...
  • Page 16 List of Figures Figure 1-1 Keysight Handheld Meter Logger Software ..26 Figure 1-2 Bluetooth adapter connection ....27...
  • Page 17 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1452A/U1452AT/U1451A User’s Guide...
  • Page 18 ......31 Table 1-3 U1452A/U1452AT/U1451A rotary switch functions . .32 Table 1-4 U1452A/U1452AT/U1451A keypad functions .
  • Page 19 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1452A/U1452AT/U1451A User’s Guide...
  • Page 20 U1452A/U1452AT/U1451A Insulation Tester User’s Guide Introduction About This Manual Preparing Your Tester Your Tester in Brief Cleaning Your Tester Additional Features This chapter teaches you how to set up your tester for the first time. An introduction to all the features of the tester is also given.
  • Page 21 Introduction About This Manual Documentation map The following manuals and software related to the U1452A/U1452AT/U1451A Product Name are available for download. Please visit our website at http://www.keysight.com/find/hhTechLib for the latest version. Check the manual edition on the first page of each manual.
  • Page 22 – Four 1.5 V AA alkaline batteries – Remote switch probe and adapter (model U1452A only) – Certificate of Calibration 3 For any question or problems, refer to the Keysight contact numbers on the back of this manual. Install or change the batteries Your tester is powered by four 1.5 V AA alkaline batteries (included in the...
  • Page 23 1.5 V AA batteries. 6 Ensure that the inner rubber cover is positioned properly. 7 Replace the battery cover back in its original position and tighten the screws. 8 Finally fit the orange rubber holster back on the tester. U1452A/U1452AT/U1451A User’s Guide...
  • Page 24 To avoid instruments being damage from battery leakage: CAUTION – Always remove dead batteries immediately. – Always remove the batteries and store them separately if the tester is not going to be used for a long period. U1452A/U1452AT/U1451A User’s Guide...
  • Page 25 To power ON your tester, turn the rotary switch from the position to any other position. Select the range The tester’s selected range is always displayed on the right-hand end of the bar graph. Selected range Autoranging indicator U1452A/U1452AT/U1451A User’s Guide...
  • Page 26 > is shown on the display instead. Adjust the tilt stand To adjust the tester to a 60° standing position, pull the tilt-stand outward to its maximum reach. IR-USB cable To PC (host) Pull until maximum reach U1452A/U1452AT/U1451A User’s Guide...
  • Page 27 PC. Ensure that the Keysight logo on the U1173A IR-USB cable connected to the tester is facing up. Firmly push the IR head into the tester’s IR communication port until it snaps into place.
  • Page 28 The U1117A is compatible with the following application or software: – Keysight Handheld Meter Logger (for Windows PC) – Keysight Mobile Meter (for Android or iOS devices) – Keysight Mobile Logger (for Android or iOS devices) Snap the optic side of the U1117A to the tester’s IR communication port...
  • Page 29 Introduction Your Tester in Brief Dimensions Front view 100 mm Figure 1-3 Width dimension U1452A/U1452AT/U1451A User’s Guide...
  • Page 30 Introduction Rear and side view 58 mm 218 mm Figure 1-4 Height and depth dimensions U1452A/U1452AT/U1451A User’s Guide...
  • Page 31 The front panel parts of your tester are described in this section. Table 1-1 Front panel part descriptions Legend Description Learn more on: Red LED indicator page 72 Display screen page 38 Keypad page 34 Rotary switch page 32 Input terminals page 42 U1452A/U1452AT/U1451A User’s Guide...
  • Page 32 Table 1-2 Rear panel parts Legend Description Learn more on: IR communication port page 26 Test lead/probe holders Battery access (under the orange rubber holster) page 21 Tilt stand page 25 Fuse access (under the orange rubber holster) U1452A/U1452AT/U1451A User’s Guide...
  • Page 33 NOTE insulation resistance tests. See page 34 for more information on the key. U1452A U1452AT U1451A Table 1-3 U1452A/U1452AT/U1451A rotary switch functions Legend Measurement function U1452A U1452AT U1451A Learn more on: ✔ ✔ 50 V Insulation resistance test ✔...
  • Page 34 Introduction Table 1-3 U1452A/U1452AT/U1451A rotary switch functions (continued) Legend Measurement function U1452A U1452AT U1451A Learn more on: ✔ ✔ 100 V Insulation resistance test ✔ ✔ - Timed test page 56 ✔ ✔ - Dielectric Absorption Ratio test ✔ ✔...
  • Page 35 Turning the rotary switch to another position resets the current operation of the key. U1452A/U1452AT U1451A Table 1-4 U1452A/U1452AT/U1451A keypad functions Function when pressed for: Legend Less than 1 second More than 1 second Insulation Resistance (IR) Test: Initiates an IR test (when the rotary switch is in one of the Ω...
  • Page 36 Introduction Table 1-4 U1452A/U1452AT/U1451A keypad functions (continued) Function when pressed for: Legend Less than 1 second More than 1 second Lock: Press to lock the insulation test or View: Press and hold to enter the Log earth-bond resistance test (when the rotary Review menu.
  • Page 37 Introduction Table 1-4 U1452A/U1452AT/U1451A keypad functions (continued) Function when pressed for: Legend Less than 1 second More than 1 second Limit: Press to enable the comparison for limit mode. Smooth: Press and hold to smoothen the – Press again to set the comparison value.
  • Page 38 Introduction Table 1-4 U1452A/U1452AT/U1451A keypad functions (continued) Function when pressed for: Legend Less than 1 second More than 1 second Setup: Press and hold to enter the Setup menu. – In the Setup menu, press navigate through the menu pages. Press at each menu page to move the cursor to a specific menu item.
  • Page 39 Display screen allocation example Table 1-5 General annunciators Legend Description Remote control enabled Battery capacity indication Analog bar graph Test indication for insulation resistance and earth-bond resistance tests Hazardous voltage sign for measuring voltage ≥30 V or OL (overload) U1452A/U1452AT/U1451A User’s Guide...
  • Page 40 Test and Test Lock indication for insulation resistance and earth-bond resistance tests Primary display AC or DC indication Measuring units for primary display Test time indication for earth-bond resistance and insulation resistance tests APO (Auto Power-Off) enabled Limit comparison enabled Data logging in progress U1452A/U1452AT/U1451A User’s Guide...
  • Page 41 Measurement units display Sign/Notation Description Giga 1E+09 (1000000000) Mega 1E+06 (1000000) kilo 1E+03 (1000) nano 1E–09 (0.000000001) micro 1E–06 (0.000001) μ milli 1E–03 (0.001) mV, V Voltage, units for voltage measurement nF, μF, mF Farad, units for capacitance measurement U1452A/U1452AT/U1451A User’s Guide...
  • Page 42 The unit and range will be indicated according to various measurements (see Table 1-7). Table 1-7 Analog bar graph display Function Bar graph Ω , Ω Ω Mega U1452A/U1452AT/U1451A User’s Guide...
  • Page 43 440 mA/1000 V, 30 kA fast-acting fuse The remote switch probe is used for insulation resistance Remote switch (IR) and earth-bond probe terminal resistance (EBR) tests. for IR and EBR tests Figure 1-6 Connecting the remote switch probe U1452A/U1452AT/U1451A User’s Guide...
  • Page 44 2 Turn the tester over, and shake out any dirt that may have accumulated in the terminals. Wipe the case with a damp cloth and mild detergent — do not use abrasives or solvents. Wipe the contacts in each terminal with a clean swab dipped in alcohol. U1452A/U1452AT/U1451A User’s Guide...
  • Page 45 Toggles the red LED indicator alert for insulation resistance tests. If enabled, the red LED indicator will blink every two seconds during an insulation resistance test. The red LED indicator alert is disabled when the Limit feature (see page 75) is enabled. U1452A/U1452AT/U1451A User’s Guide...
  • Page 46 Change the resolution count to high. To permanently enable change the resolution count. See “Changing the display count” on page 94. U1452A/U1452AT Tests the LCD. All LCD annunciators are lighted. Press any key to exit this mode. U1452A/U1452AT/U1451A User’s Guide...
  • Page 47 Introduction THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1452A/U1452AT/U1451A User’s Guide...
  • Page 48 U1452A/U1452AT/U1451A Insulation Tester User’s Guide Making Measurements Insulation Resistance Test Earth-Bond Resistance Test Measuring AC or DC Voltage Measuring Frequency Measuring Resistance Continuity Test Measuring Capacitance The following sections describe how to take measurements with your tester.
  • Page 49 Setup), the test is inhibited. The symbol is shown on the display when either the external voltage or the test voltage is greater than 30 V. Disconnect the tester and remove the power of the circuit before proceeding. U1452A/U1452AT/U1451A User’s Guide...
  • Page 50 Making Measurements Remote Switch Probe Hold Test will continue until is released. Figure 2-1 Insulation resistance test example U1452A/U1452AT/U1451A User’s Guide...
  • Page 51 Remote Switch Probe. By default the button on the Remote Switch Probe emulates the button on the tester. To change the default button operation, see “Changing the button operation on the remote switch probe” on page 100. U1452A/U1452AT/U1451A User’s Guide...
  • Page 52 “Changing the Dielectric Absorption Ratio (DAR) for IR tests” on page 101 to disable this feature. If you disable this feature, you will need to press to unlock the tester, even if the test has already stopped. U1452A/U1452AT/U1451A User’s Guide...
  • Page 53 Press Press Press start the test. select the timed test. view the timer. Press again to stop the test. Press to view After 30 seconds. the resistance value. After 1 minute, time up. Figure 2-2 T/Time operation U1452A/U1452AT/U1451A User’s Guide...
  • Page 54 Press to view After 30 seconds. Error as IR (t0) > maximum range the resistance value. After 1 minute, time up. DAR > 999.9 Press to view t0. Press to view t00. Figure 2-3 DAR operation U1452A/U1452AT/U1451A User’s Guide...
  • Page 55 Press to view After 1 minute. the resistance value. Error as IR (t0) > maximum range After 10 minutes, time up. PI > 999.9 Press to view t0. Press to view t00. Figure 2-4 PI operation U1452A/U1452AT/U1451A User’s Guide...
  • Page 56 Viewing the leakage current Press to view the leakage current display. The leakage current display is related to the insulation resistance. The higher the resistance tested, the lower the current is to be measured. U1452A/U1452AT/U1451A User’s Guide...
  • Page 57 ≤2 Ω is to be measured. When the source voltage is <4.7 V, the tester will inhibit the test automatically. The secondary display indicates the voltage (with auto-ranging enabled). – The APO (auto power-off) function is disabled during the test. – See also “Timed insulation resistance/earth-bond resistance test” page 52. U1452A/U1452AT/U1451A User’s Guide...
  • Page 58 Making Measurements Remote Switch Probe Hold > Test will continue until is released. Figure 2-5 Earth-bond resistance test example U1452A/U1452AT/U1451A User’s Guide...
  • Page 59 2 Press and hold to verify the fuse condition. 3 If the fuse has been blown, FUSE will be shown on the display. Follow the instructions in the U1452A/U1452AT/U1451A Service Guide to replace the fuse. Fuse blown; replace fuse.
  • Page 60 – This tester displays DC voltage values as well as their polarity. Negative DC NOTE voltages will return a negative sign on the left of the display. – Press to measure the frequency of the voltage source. See “Measuring Frequency” on page 62 to learn more. U1452A/U1452AT/U1451A User’s Guide...
  • Page 61 Making Measurements Figure 2-6 AC or DC voltage measurement example U1452A/U1452AT/U1451A User’s Guide...
  • Page 62 While the signal is being identified, you can press to lock the (AC or DC) signal on the primary display. At any time, you can press to stop the Auto function and lock the identified signal component (AC or DC). U1452A/U1452AT/U1451A User’s Guide...
  • Page 63 – If a reading shows as 0 Hz or is unstable, the input signal may be below or near the trigger level. You can usually correct these problems by manually selecting a lower input range, which increases the sensitivity of the tester. U1452A/U1452AT/U1451A User’s Guide...
  • Page 64 The bar graph does not indicate frequency but indicates the voltage value of the input signal. Rise Time Fall Time + Width – Width Period Figure 2-7 Definition of frequency U1452A/U1452AT/U1451A User’s Guide...
  • Page 65 – Because the tester’s test current flows through all possible paths between the probe tips, the measured value of a resistor in a circuit is often different from the resistor’s rated value. U1452A/U1452AT/U1451A User’s Guide...
  • Page 66 Making Measurements Figure 2-8 Resistance measurement example U1452A/U1452AT/U1451A User’s Guide...
  • Page 67 – The continuity function detects intermittent shorts and opens. A brief short causes the tester to emit a short beep. – You can enable or disable the audible alert via the Setup. See “Changing the continuity alert” on page 92 for more information on the audible alert option. U1452A/U1452AT/U1451A User’s Guide...
  • Page 68 Making Measurements (open) (closed) Figure 2-9 Continuity test example U1452A/U1452AT/U1451A User’s Guide...
  • Page 69 – The tester measures capacitance by using an AC sine wave. NOTE – The resistance of the test leads will impact the accuracy of the measurement. It is recommended to use short leads to measure capacitance. – The test frequency is 54.5 Hz. U1452A/U1452AT/U1451A User’s Guide...
  • Page 70 Making Measurements – Figure 2-10 Capacitance measurement example U1452A/U1452AT/U1451A User’s Guide...
  • Page 71 Making Measurements THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1452A/U1452AT/U1451A User’s Guide...
  • Page 72 U1452A/U1452AT/U1451A Insulation Tester User’s Guide Tester Features Making Relative Measurements (Null) Freezing the Display (TrigHold and AutoHold) Performing Limit Comparisons (Limit) Recording Measurement Data (Log) Reviewing Previously Recorded Data (View) The following sections describe the additional features available in your tester.
  • Page 73 Press to zero-adjust the display. – For DC voltage measurements, the thermal effect will influence the accuracy of the measurements. Short the test leads and press when the displayed value is stable to zero-adjust the display. U1452A/U1452AT/U1451A User’s Guide...
  • Page 74 Press and hold to exit this mode. Pressing and holding when the rotary switch is in one of the Ω NOTE Mega the Ω position will result in a test being performed instead. U1452A/U1452AT/U1451A User’s Guide...
  • Page 75 To change the default AutoHold threshold count see “Changing the variation count” on page 89 for more information. If the reading value is unable to reach a stable state, the reading value will not NOTE be updated. U1452A/U1452AT/U1451A User’s Guide...
  • Page 76 3 The most significant digit can be set to a value from 1 to 9. The remaining two digits can be set to 0, 00, or left blank along with any unit combination (see Table 3-1). 4 Position the cursor on the annunciator to change the Limit pass condition > (< or >). U1452A/U1452AT/U1451A User’s Guide...
  • Page 77 – The red LED blinks thrice When the Limit feature is enabled for insulation resistance tests, the red LED NOTE indicator lights up accordingly to the changes in the limit values instead of blinking every 2 seconds. U1452A/U1452AT/U1451A User’s Guide...
  • Page 78 Before starting a recording session, set up the tester for the measurements to be recorded. To change the Log option see “Changing the recording option” on page 98 for more information. “Reviewing Previously Recorded Data (View)” on page 81 to review or erase the recorded entries. U1452A/U1452AT/U1451A User’s Guide...
  • Page 79 Subsequent readings are automatically recorded into the tester’s memory at the interval specified in the Setup. 2 Press and hold again to exit the interval log mode. U1452A/U1452AT/U1451A User’s Guide...
  • Page 80 Voltage, frequency, When the input signal varies more than the Voltage, resistance, or AutoHold capacitance cable length, variation count and the reading update is stable. capacitance or output source voltage U1452A/U1452AT/U1451A User’s Guide...
  • Page 81 The maximum number of readings that can be stored for the event log is 100 entries. When all entries are occupied, will be shown when you press and hold APO (auto power-off) is disabled during the recording session. NOTE U1452A/U1452AT/U1451A User’s Guide...
  • Page 82 The data sanitization operation may take up to 30 seconds to complete. CAUTION Do not press any keys or turn the rotary switch until the data sanitization operation is completed. U1452A/U1452AT/U1451A User’s Guide...
  • Page 83 Tester Features THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1452A/U1452AT/U1451A User’s Guide...
  • Page 84 U1452A/U1452AT/U1451A Insulation Tester User’s Guide Setup Options Using the Setup Menu Setup Menu Summary Setup Menu Items The following sections describe how to change the preset features of your tester.
  • Page 85 U1452A/U1452AT – Press to save your changes. – While the menu item’s value is flashing, press to discard your changes. The tester will automatically exit the Setup menu after 30 seconds of inactivity. NOTE U1452A/U1452AT/U1451A User’s Guide...
  • Page 86 1 second to enter the Setup menu. Press to edit Press the selected menu move the cursor left item’s value. or right. Press to increment or decrement the selected digit. Press again to save the changes made. U1452A/U1452AT/U1451A User’s Guide...
  • Page 87 Default is a beep (bEEE). Change the battery selection from primary (PRi) to secondary (SEC). PRi or SEC page 93 Default is primary (PRi). yES or no Reset the tester to its factory default settings. page 94 U1452A/U1452AT/U1451A User’s Guide...
  • Page 88 Set the maximum inhibit voltage for insulation resistance test. 30 V, 50 V, or 75 V page 99 Default is 30 V. Enable or disable the lock once feature. yES or no page 100 Default is enabled (yES). U1452A/U1452AT/U1451A User’s Guide...
  • Page 89 Change or disable the button operation on the remote probe. bt-1 to bt-7 page 100 (d or E) Default is (bt-7 Set the Dielectric Absorption Ratio in seconds (60:30 or 60:15). 60.30 or 60.15 seconds page 101 Default is 60:30 (seconds). U1452A/U1452AT/U1451A User’s Guide...
  • Page 90 +1. Smooth will be restarted when the variation count is exceeded, when the range is changed, or after a tester function or feature is enabled. The variation count is set to the value used for the AutoHold feature (see “Changing the variation count” on page 89). U1452A/U1452AT/U1451A User’s Guide...
  • Page 91 3 Use the arrow keys to change the beep frequency. Select to disable the beeper. 4 Press to save your changes (or press to discard your changes). 5 Press and hold until the tester restarts to return to normal operation. U1452A/U1452AT/U1451A User’s Guide...
  • Page 92 Changing the LCD backlight timeout The tester’s LCD backlight uses a timer to determine when to turn off the LCD backlight. Legend Range Defaul t setting – (01 to 99) seconds – E(nabled) or d(isabled) U1452A/U1452AT/U1451A User’s Guide...
  • Page 93 3 Use the arrow keys to change the continuity alert. 4 Press to save your changes (or press to discard your changes). 5 Press and hold until the tester restarts to return to normal operation. U1452A/U1452AT/U1451A User’s Guide...
  • Page 94 , and press to edit the value. 3 Use the arrow keys to change the power-on melody. Select to disable the power-on melody. option is for Keysight internal use. USEr NOTE 4 Press to save your changes (or press to discard your changes).
  • Page 95 Use these settings to change the display count for the following measurements/ tests. The low resolution count is a tenth of the original display count. As an example, if the original display count is 6000 counts, then the low resolution display count is 600 counts. U1452A/U1452AT/U1451A User’s Guide...
  • Page 96 To change the cable length unit: 1 Press for more than 1 second to enter the Setup menu. 2 Browse to , and press to edit the value. 3 Use the arrow keys to change the cable length unit. U1452A/U1452AT/U1451A User’s Guide...
  • Page 97 The tester’s audible and visual alerts users to the presence of circuit continuities (see page 66) and values exceeding the Limit values set (see page 66). Legend Range Defaul t setting bE.rL, --.rL, bE.--, or --.-- bE.rL U1452A/U1452AT/U1451A User’s Guide...
  • Page 98 3 Use the arrow keys to change the sample interval duration. 4 Press to save your changes (or press to discard your changes). 5 Press and hold until the tester restarts to return to normal operation. U1452A/U1452AT/U1451A User’s Guide...
  • Page 99 This setting is used with insulation resistance tests (see page 56) or earth-bond resistance measurements (see page 56). The tester performs the test over the timed period defined in this setting. Legend Range Defaul t setting (00.05 to 59.59) mm:ss 00.10 U1452A/U1452AT/U1451A User’s Guide...
  • Page 100 3 Use the arrow keys to change the value of the inhibit voltage. 4 Press to save your changes (or press to discard your changes). 5 Press and hold until the tester restarts to return to normal operation. U1452A/U1452AT/U1451A User’s Guide...
  • Page 101 Changing the button operation on the remote switch probe This setting is used with the remote switch probe. The button operation on the remote switch probe will emulate the function selected in this setting. U1452A/U1452AT/U1451A User’s Guide...
  • Page 102 Changing the Dielectric Absorption Ratio (DAR) for IR tests This setting is used with insulation resistance tests (see page 56). The tester perform the DAR test using the ratio set here. Legend Range Defaul t setting (60.30 or 60.15) seconds 60.30 U1452A/U1452AT/U1451A User’s Guide...
  • Page 103 3 Use the arrow keys to change the value of the DAR ratio. 4 Press to save your changes (or press to discard your changes). 5 Press and hold until the tester restarts to return to normal operation. U1452A/U1452AT/U1451A User’s Guide...
  • Page 104 U1452A/U1452AT/U1451A Insulation Tester User’s Guide Characteristics and Specifications For the characteristics and specifications of the U1452A/U1452AT/U1451A Insulation Tester, refer to the datasheet at http://literature.cdn.keysight.com/litweb/pdf/5991-4290EN.pdf.
  • Page 105 Characteristics and Specifications THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. U1452A/U1452AT/U1451A User’s Guide...
  • Page 106 This information is subject to change without notice. Always refer to the Keysight website for the latest revision. © Keysight Technologies 2014–2021 Edition 5, January 2021 Printed in Malaysia  U1451-90003 www.keysight.com...

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