Hioki IR4057-50 Instruction Manual
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Hioki IR4057-50 Instruction Manual

Insulation tester
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IR4053
IR4055
IR4056
IR4057-50
INSULATION TESTER
May 2021 Revised edition 1
IR4057B961-01 21-05H
(IR4052C960-01)
IR4053-10
IR4055-11
IR4056-20
IR4056-21
HIOKI IR4057B961-01
   Instruction Manual
EN

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  • Page 1 IR4053 IR4053-10 IR4055 IR4055-11 IR4056    Instruction Manual IR4056-20 IR4056-21 IR4057-50 INSULATION TESTER May 2021 Revised edition 1 IR4057B961-01 21-05H (IR4052C960-01) HIOKI IR4057B961-01...
  • Page 2 HIOKI IR4057B961-01...
  • Page 3 Model-specific functionality The following functionality is available on a model- specific basis: : Supported –: Not supported Models (As shown on instrument) Functionality IR4053 IR4055 IR4056 IR4057-50 p. 37 Displaying 1-minute Values – – –  Negative Voltage p. 40 –...
  • Page 4 HIOKI IR4057B961-01...

  • Page 5: Table Of Contents

    Setting the Comparator ..........32 Canceling the Comparator ........33 Insulation Resistance Measurement ...34 Lock Function ............35 索 Measuring Insulation Resistance ......36 引 Displaying 1-minute Values (IR4057-50 only) ... 37 Voltage Characteristics of Measurement Terminals .. 38 HIOKI IR4057B961-01...
  • Page 6 (IR4056 and IR4057-50 only) ......42 Ω Measurement Function (IR4053 and IR4055 only) ......44 3.10 Wireless Communications Function ..51 Using the GENNECT Cross (IR4055 and IR4057-50 only) ........51 ® Excel Direct Input Function (HID function) (IR4057-50 only) ............55 Specifications 4.1 General Specifications .........59...

  • Page 7: Introduction

    Thank you for choosing the Hioki IR4053-10, IR4055-11, IR4056-   IR4056-21, and IR4057-50 Insulation Tester. To ensure your ability to get the most out of this instrument over the long term, please read this manual carefully and keep it available for future reference.
  • Page 8 Verifying Package Contents Options The options listed below are available for the instrument. To order an option, please contact your authorized Hioki distributor or reseller. Options are subject to change. Please check Hioki's website for the latest information. HIOKI IR4057B961-01...
  • Page 9 (1.2 m) L4935 Alligator Clip Set CAT IV 600 V/CAT III 1000 V, 10 A L4938 Test Pin Set CAT III 600 V/CAT II 600 V, 10 A Z3210 Wireless Adapter – (for IR4057-50) 付 録 索 引 HIOKI IR4057B961-01...

  • Page 10: Notations

    Indicates a strong magnetic-field hazard. The effects of the magnetic force can cause abnormal operation of heart pacemakers and/or medical electronics. Indicates prohibited actions. Indicates the action which must be performed. Additional information is presented below. HIOKI IR4057B961-01...
  • Page 11 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 付 録 1 2 3 4 5 6 7 8 9 0 索 引 HIOKI IR4057B961-01...
  • Page 12 Notations Accuracy Hioki expresses accuracy as error limit values specified in terms of percentages of reading and digits. Refers to the displayed value of the measuring Reading instrument. The limit values of reading errors are (Displayed value) expressed in percent of reading (% of reading, % rdg).

  • Page 13: Safety Information

    WARNING Protective gear Performing measurement using this instrument involves live-line work. To prevent an electric shock, use appropriate protective insulation and adhere to applicable laws and regulations. 付 録 索 引 HIOKI IR4057B961-01...
  • Page 14 CAT IV: When measuring the circuit from the service drop to the service entrance, and to the power meter and primary overcurrent protection device (distribution panel). Distribution panel Service entrance Internal wiring Service drop CAT II CAT III CAT IV Outlet Power meter Fixed installation HIOKI IR4057B961-01...

  • Page 15: Operating Precautions

    Replace the test leads with those specified 付 by Hioki. 録 • Verify that the instrument operates normally to ensure that no damage occurred during storage or shipping. If you find any damage, contact your 索 authorized Hioki distributor or reseller. 引 HIOKI IR4057B961-01...
  • Page 16 Doing so may damage the instrument, resulting in electric shock. • Use only the specified test leads. Use of any test lead not specified by Hioki does not allow safe measurements. • To prevent electrical accidents, turn off the circuit before connecting the test leads.
  • Page 17 Dropping or knocking down the instrument can cause injury or damage to the instrument. Precautions when transporting the instrument During shipment of the instrument, handle it carefully so that it is not damaged due to a vibration or shock. 付 録 索 引 HIOKI IR4057B961-01...
  • Page 18 CAT II measurements. You can use the test leads with the sleeve removed for secondary side of the circuit breakers turned off. (See “Measurement Categories” (p. 8)) • If the sleeves are inadvertently removed during measurement, stop the measurement. (p.  2 6) HIOKI IR4057B961-01...

  • Page 19: Overview

    • There is no need to switch to a card tester when you need to measure 付 voltage. 録 Ω measurement function (IR4053 and IR4055 only) • Insulation resistance can be measured accurately for solar battery panel. 索 引 HIOKI IR4057B961-01...

  • Page 20: Names And Functions Of Parts

    Names and Functions of Parts 1.2 Names and Functions of Parts Front IR4056, IR4057-50 (The illustration shows the IR4057-50) (p. 19, p. 22, p. 34, p. 40) Display (p.  9 ) (p.  9 ) MEASURE key (p.  1 6) Starts insulation resistance measurement.
  • Page 21 Ω COMP Press with the key simultaneously: configures the wireless communications function. (p. 51) (IR4057-50) Press before measurement to set the instrument RELEASE to the 500 V or 1000 V range (to prevent erroneous application of the test signal). IR4053, IR4055...
  • Page 22 (or release). Description in Turn off the Turn on the MEASURE key. MEASURE this manual key. *: Convenient way for performing measurement repeatedly Power OFF Rotary switch status Description in Turn off the rotary this manual switch. HIOKI IR4057B961-01...
  • Page 23 Names and Functions of Parts Display IR4057-50 Bar graph Measured value Comparator judgment reference value or 1-minute value Battery indicator (three levels) (p.  2 9) Turns on when the voltage measured with the V range is DC. Turns on when the voltage measured with the V range is AC.
  • Page 24 Indicates wireless communications function status. (p. 51) IR4056 Measured value or comparator reference value (Other functions are the same as the IR4057-50.) Turns on when the reference value is indicated by the comparator function. HIOKI IR4057B961-01...
  • Page 25 IR4053, IR4055 (The illustration shows the IR4055) Measured value or comparator reference value (Other functions are the same as the IR4056 and the IR4057-50.) Ω Turns on when the PV measurement mode is selected. Ω Turns on when selecting 500 V range in the PV measurement mode.
  • Page 26 • Starts insulation resistance measurement. MEASURE • Lights up in red interlocked with the live wire warning indicator of the instrument. Lights up in accordance with the comparator judgment result. Judgment display • PASS: Green • FAIL: Red HIOKI IR4057B961-01...

  • Page 27: Preparing For Measurement

    EARTH terminal Connect the red Connect the black test lead. test lead. Attach each test pin or alligator clip to a lead. 付 録 Fully insert the test lead to the test pin or alligator clip. 索 引 HIOKI IR4057B961-01...

  • Page 28: Replacing Batteries Or Fuse

    Fuse type: FF0.5 AH/1000 V (70 172 40.0.500: SIBA GmbH) (Fast blow, arc-extinguishing material included, and high breaking capacity) The fuses can be purchased via authorized Hioki distributor or reseller. (Fuse replacement not required for the IR4053 or IR4055) • To prevent instrument damage or electric shock, use only the screw for securing the battery cover in place that are originally installed.
  • Page 29 • The battery indicator blinks when the remaining battery capacity is low. In this case, measurement is not possible. Replace the batteries with new ones. (p.  2 9) • Handle and dispose of batteries in accordance with local regulations. 付 録 索 引 HIOKI IR4057B961-01...
  • Page 30 Battery cover Replace all four batteries or the fuse. Slide the battery cover back into place and tighten the screw. Batteries Fuse (LR6 ×4) FF0.5 AH/1000 V Check the (70 172 40.0.500: polarity. SIBA GmbH) HIOKI IR4057B961-01...

  • Page 31: Using The L9788-10 Test Lead With Remote Switch (Red)

    L9788-10. Check the red indicator of the MEASURE key of L9788-10 and display Ω interlocked with the live wire warning indicator of the instrument. Ω Press 付 録 Check that the L9788-10 tip lamp lights up. 索 引 HIOKI IR4057B961-01...
  • Page 32 When the tip pin of the L9788-10 Test Lead with Remote Switch (Red) (option) is worn out or broken, it can be replaced. The tip pin can be purchased via authorized Hioki distributor or reseller. Turn off the rotary switch and disconnect the L9788-10.

  • Page 33: Installing The Z3210 Wireless Adapter (Ir4057-50 Only)

    Installing the Z3210 Wireless Adapter (IR4057-50 only) Removing the sleeves Attaching the sleeves Hold the bottom of the sleeves Insert the metal pins of the test leads into and pull the sleeves off. (For the holes of the sleeves, and firmly push safety reasons, the cap has been them all the way in.
  • Page 34 Installing the Z3210 Wireless Adapter (IR4057-50 only) Procedure You will need: • Phillips-head screwdriver (No. 2) • Flat-head screwdriver • Z3210 Wireless Adapter (option) Rear Turn off the rotary switch and remove the test leads. Unscrew the screws and remove the battery cover.

  • Page 35: Measurement

    Before using the instrument, verify that it operates normally to ensure that no damage occurred during storage or shipping. If you find any damage, contact your authorized Hioki distributor or reseller. Checking the remaining battery charge Is the battery level adequate?

  • Page 36: Auto Power Save (Power-Saving Function)

    OFF. With the backlight off, press Continuous for approx. 2 seconds until the short beep instrument beeps. Press for approx. 2 seconds. The automatic light-off function is enabled by setting the rotary switch to OFF. HIOKI IR4057B961-01...

  • Page 37: Comparator Function

    Insulation Criterion or Short beep Long beep Resistance higher Criterion or Lights up in Low resistance Long beep Short beep 付 lower 録 Criterion or Ω Short beep Long beep higher Voltage Comparator cannot be set. 索 引 HIOKI IR4057B961-01...

  • Page 38: Setting The Comparator

    Ω 1000 V* 1000 V ‒ Ω Ω ‒ ‒ ‒ *1: Factory default setting Ω *2: Factory default setting when PV function is selected. *3: Reference values 0.1 to 0.5 are only for models IR4053 and IR4055. HIOKI IR4057B961-01...

  • Page 39: Canceling The Comparator

    [REF] blinks and the resistance value that will be used as the judgement reference is displayed. IR4053, IR4055, IR4056: REF IR4057-50: COMP Press to select the judgement reference. If there is no operation for about 2 seconds after you select the judgment...

  • Page 40: Insulation Resistance Measurement

    • Turn off the rotary switch after use. • Disconnection when measuring is recommended of any equipment having a lower withstanding voltage than the test voltage, or equipment or parts having an unknown withstanding voltage connected to the circuit to be measured. HIOKI IR4057B961-01...

  • Page 41: Lock Function

    500 V, 1000 V or PV range. Blinks Turns off Press Pressing this key unlocks the instrument and switches to the measurement screen. Turns off The screen is locked 1 minute after the last measurement or operation again. 付 録 索 引 HIOKI IR4057B961-01...

  • Page 42: Measuring Insulation Resistance

    If there is any remaining voltage on the measuring object, red and white blink alternately on the backlight. Press and hold the MEASURE key. To make continuous measurements, pull up the MEASURE key. (p.  1 6) Check the value after the indicator has stabilized. HIOKI IR4057B961-01...

  • Page 43: Displaying 1-Minute Values (Ir4057-50 Only)

    (p.  3 5) Displaying 1-minute Values (IR4057-50 only) This function is only available on the IR4057-50. The function cannot be used if the comparator function has been enabled. Disable the comparator function before use. (p. 33)

  • Page 44: Voltage Characteristics Of Measurement Terminals

    Insulation Resistance Measurement Voltage Characteristics of Measurement Terminals 1200 Rated 1000 V 1000 Rated 500 V Rated 250 V Rated 125 V Rated 50 V 0.05 0.125 ∞ 0.1 0.25 100 1000 Ω Resistance of measuring object [M HIOKI IR4057B961-01...

  • Page 45: Hioki Ir4057B961-01

    Without removing the test leads from the measuring object, turn off MEASURE key. The built-in discharge resistor automatically discharges the item. In the IR4057-50, the bar graph level decreases according to discharge. Turned on However, measuring objects with smaller Discharging capacitance component discharge quickly and the bar graph level may not change.

  • Page 46: Voltage Measurement

    Set the rotary switch to V. Connect the black test lead to the earth side of the object being measured. Connect the red test lead to the line side of the breaker. Check the value after the indicator has stabilized. HIOKI IR4057B961-01...

  • Page 47: Negative Voltage Notification Function (Ir4053 And Ir4055 Only)

    (Factory setting) of the backlight blinks alternately. Disabled If there is no operation for approx. 2 seconds after ON or OFF is selected, the setting is confirmed, and the screen changes to measurement screen. 付 録 索 引 HIOKI IR4057B961-01...

  • Page 48: Low Resistance Measurement (Ir4056 And Ir4057-50 Only)

    Low Resistance Measurement (IR4056 and IR4057-50 only) 3.8 Low Resistance Measurement (IR4056 and IR4057-50 only) This function is only available on the IR4056 and the IR4057-50. WARNING Do not measure under a live circuit condition. CAUTION • If active circuits are connected to the measuring object circuit in parallel, the impedance and transient current of the parallel circuit could cause measurement errors.
  • Page 49 Low Resistance Measurement (IR4056 and IR4057-50 only) Example: Checking continuity of grounding wire Ω Set the rotary switch to the Short circuit the tip of the test lead. Turn on the MEASURE key. Turn off the MEASURE key to retain the measured value.

  • Page 50: Ω Measurement Function (Ir4053 And Ir4055 Only)

    • Do not touch the measuring object immediately after measurement. A highly charged voltage may cause electric shock. • Discharge the measuring object with the discharge function of the instrument after a measurement. (p.  3 9) HIOKI IR4057B961-01...
  • Page 51 1000 V DC or 600 V AC. Doing so may cause electric shock or failure. • If the solar battery panel has failed, do not perform any insulation resistant measurement. Doing so may damage the bypass diode of the solar battery panel. 付 録 索 引 HIOKI IR4057B961-01...
  • Page 52 Ω between measurement terminals because a 1 M current limiting resistor is connected to the EARTH terminal. Ω Example: When a 10 M resistor is measured, the voltage is Ω Ω divided by 1 M and 10 M HIOKI IR4057B961-01...
  • Page 53 If the key is on, turn it off. (p.  1 6) 付 Ω Set the rotary switch to PV 録 Press to set 500 V or 1000 V as the test voltage. 索 引 Press to release the lock. HIOKI IR4057B961-01...
  • Page 54 If a voltage is detected between the P and the ground terminals, the insulation may have deteriorated. When there is a voltage on the measuring object, the voltage detection function makes the backlight light in red and white alternately. HIOKI IR4057B961-01...
  • Page 55 録 generated by the solar battery. When measuring terminal P and insulation has not 索 deteriorated, connect the red test lead to the terminal N 引 of the string side and repeat the procedures to 9. HIOKI IR4057B961-01...
  • Page 56 Turn on all the disconnector devices of the strings. Turn on the main switch of the connection box. 1 minute after the last measurement or operation, the turns on and the 500 V/1000 V RELEASE key blinks. Press the key to release the lock. HIOKI IR4057B961-01...

  • Page 57: Wireless Communications Function

    For details, see the Help function in the GENNECT Cross (application software, free of charge). GENNECT Cross Official Website https://gennect.net/en/cross/index (IR4057-50 only) Install the Z3210 Wireless Adapter (option) to the instrument. (p.  2 7) Install the GENNECT Cross on your mobile device. Turn on the IR4055 or...
  • Page 58 • The Z3210 uses 2.4 GHz band wireless technology. It may not be possible for the device to establish a wireless connection when used in the vicinity of other devices that use the same frequency band, for example Wi-Fi devices (IEEE 802.11.b/g/n). HIOKI IR4057B961-01...
  • Page 59 IR4055 or the IR4057-50 to automatically pair it with the instrument (the app can be paired with up to 8 instruments). • Allow about 5 to 30 seconds for the instrument to pair with the app after being turned on.
  • Page 60 GENNECT Cross. The values displayed by the instrument may be different from the values displayed by the application software due to communication delays or differences in the update timing. Standard measurement Measured values of multiple channels are saved. HIOKI IR4057B961-01...

  • Page 61: Excel ® Direct Input Function (Hid Function) (Ir4057-50 Only)

    Wireless Communications Function ® Excel Direct Input Function (HID function) (IR4057-50 only) This function cannot be used at the same time as GENNECT Cross (p.  5 1). The human interface device (HID) profile, with which the Z3210 Wireless Adapter is equipped, is a profile same as that wireless keyboards use.
  • Page 62 Set the rotary switch to OFF. Install the Z3210 Wireless Adapter (option) to the instrument. See “2.3 Installing the Z3210 Wireless Adapter (IR4057-50 only)” (p. 27) If the wireless communications function is off, you won’t be able to check or change the HID setting.
  • Page 63 1. Delete the instrument from your device’s Bluetooth settings. 2. Turn off the Z3210’s HID function. (p.  5 6) 3. Reconnect the instrument using GENNECT Cross’s connected device settings. For details, please check the Z3210’s website. https://z3210.gennect.net 付 録 索 引 HIOKI IR4057B961-01...
  • Page 64 Wireless Communications Function HIOKI IR4057B961-01...

  • Page 65: Specifications

    40°C to 50°C (104°F to 122°F), at 50°C and below relative with linear decrease up to 50% RH (no condensation) • IR4056, IR4057-50 −25°C to 40°C (−13°F to 104°F), 90% RH or less (no condensation) 40°C to 65°C (104°F to 149°F), at 65°C and below...
  • Page 66 (6.26″W × 6.97″D × 2.09″D) protrusions) Mass (including • IR4053, IR4055, IR4056: Approx. 600 g (21.2 oz.) battery, • IR4057-50: Approx. 640 g (22.6 oz.) excluding test lead) Product warranty period: 3 years Fuse FF0.5 AH/1000 V (70 172 40.0.500: SIBA GmbH)

  • Page 67: Basic And Accuracy Specifications

    4.2 Basic and Accuracy Specifications Measurement item Insulation Resistance measurement: DC voltage supply, current detection Low resistance measurement: DC current supply, voltage detection (IR4056 and IR4057-50 only) Voltage measurement: Automatic DC/AC detection AC voltage measurement rectification method: Mean rectification RMS value indication Ω...
  • Page 68 0.200 to measuring 10.00 25.0 50.0 1000 Ω range [M Accuracy IR4053, IR4055: ±4% rdg (Tolerance) IR4056, IR4057-50: ±2% rdg ±2 dgt 2nd effective 10.1 to 25.1 to 50.1 to 501 to 1010 to measuring range 100.0 2000 4000 Ω...
  • Page 69 ‒ Ω Ω Display range ‒ ‒ ‒ 2000 M 4000 M Maximum Ω Ω ‒ ‒ ‒ 2000 M 4000 M displayed value Ω Ω Resolution ‒ ‒ ‒ 10 M 10 M 付 録 索 引 HIOKI IR4057B961-01...
  • Page 70 65°C) equal to 65°C) or equal to 65°C) (Only for IR4056 (Only for IR4056 (Only for IR4056 and IR4057-50) and IR4057-50) and IR4057-50) ±4% rdg and within ±8% rdg and within Effect of humidity ±2% rdg ±6 dgt...
  • Page 71 Basic and Accuracy Specifications Insulation Resistance Measurement (continued) IR4053, IR4055, IR4056: Within 1.0 s Display update (no update during response) interval IR4057-50: Within 0.6 s (no update during response) Open-circuit 1 to 1.2 times of rated measurement voltage voltage Lower limit resistance value to be Ω...
  • Page 72 Basic and Accuracy Specifications Low Resistance Measurement (IR4056 and IR4057-50 only) Open-circuit voltage 4.0 V to 6.9 V 200 mA or more Measuring current Ω (display value before zero adjustment at 6 or less) ±3% rdg ±2 dgt Effect of temperature* (applied in the operating temperature range excluding 18°C to 28°C)
  • Page 73 (ranges in excess of IR4053, IR4055: IR4053, IR4055: 付 600 V are outside the 1000 V 1100 V 録 accuracy guarantee) IR4056, IR4057-50: IR4056, IR4057-50: 600 V 750 V * Over 1000 V for IR4053 and IR4055 only 索 引 HIOKI IR4057B961-01...
  • Page 74 1 M current limiting resistor is connected to the terminal. Ω Example: If a DMM with input impedance 10 M is used to measure an open Ω Ω voltage, the voltage is divided by 1 M and 10 M HIOKI IR4057B961-01...

  • Page 75: Functionality Specifications

    1.2 M or less (IR4053 and IR4055) Ω 800 k or less (IR4056 and IR4057-50) • Maximum capacitive load: 5 μF • Discharge time: Max. 30 s (when connected to 5 μF) Auto power save (APS) The power will go off automatically approx.

  • Page 76: Power-On Options

    COMP key. version 2. Press the RELEASE key while the [vEr] display is active. The display will alternate between the version number vx.xx and model 405x After checking the number, set the rotary switch to OFF. HIOKI IR4057B961-01...

  • Page 77: Maintenance And Service

    It is recommended to determine a calibration period based on those factors and to have the instrument regularly calibrated by Hioki. Please contact your authorized Hioki distributor or reseller to have your instrument periodically calibrated. Precautions when transporting the instrument...

  • Page 78: Troubleshooting

    Troubleshooting 5.1 Troubleshooting Before Returning for Repair If damage is suspected, check the following before contacting your authorized Hioki distributor or reseller. Symptom Check Items Remedy and Reference The power is not Does the battery have Replace with the new turning on.
  • Page 79 録 as the maximum Are the test leads securely Check the connection display value. connected? between the test leads and the instrument, and check 索 the connection of the tips of 引 the test leads. HIOKI IR4057B961-01...
  • Page 80 Select measured values fluctuate over time. object connected is not a acquired one minute (If using the capacitor: after the start of the IR4057-50, use This phenomenon measurement. the 1-minute value reflects the influence of If a large capacitance display function.)
  • Page 81 1/4 or less when the temperature increases 10°C. The output The reversal is due to voltage polarity is the characteristics of the reversed. insulation ohmmeter. – This does not represent a malfunction. 付 録 索 引 HIOKI IR4057B961-01...
  • Page 82 *2 Polarity: A phenomenon whereby a substance’s positive and negative electric charges move in opposite directions when an electric field is applied to it, causing the center position of the positive and negative charges to shift. HIOKI IR4057B961-01...

  • Page 83: Errors And Status Codes

    Troubleshooting Errors and status codes When an error is displayed on the LCD screen, repair is necessary. Please contact your authorized Hioki distributor or reseller. IR4053, IR4055, IR4056 Code Description Remedy and Reference • Verify that there is no broken The instrument was connection in the test leads.
  • Page 84 Err8 If the error persists, you are (connection failure; Z3210 experiencing a instrument or hardware failure) failure. Contact your authorized Hioki distributor or reseller to organize repair. Use GENNECT Cross to Err9 Firmware update error update the firmware again. (p.  6 9) The protective fuse has Replace the indicated fuse.

  • Page 85: Appx. 1 Measurement Principles

    V to the object, measuring the leak current I that flows to the object as a result, and dividing the voltage V by the leak current I. 2. Low resistance measurement (IR4056, IR4057-50) The measuring object’s resistance Rx is calculated by applying a current I to the measuring object, measuring the voltage V that occurs between the measurement terminals as a result, and dividing the voltage V by the current I.

  • Page 86: Appx. 2 Operation Uncertainty

    0°C to 35°C ±4% rdg ±3% rdg ±2 dgt Operation ±12% rdg ±30% rdg uncertainty 1st effective Guaranteed range of operation Ω Ω measurement to 2 uncertainty range Influencing factor non-applicable for E and E to E HIOKI IR4057B961-01 Appx.
  • Page 87 This measurement allows accurate measurements but is also a highly dangerous method as arc discharge may be generated due to the short circuit. There is also a fire risk depending on the deterioration level of the solar panel. Connection box 索 引 Earth HIOKI IR4057B961-01 Appx.
  • Page 88 Insulation Resistance Measurements for Solar Cell Array HIOKI IR4057B961-01 Appx.
  • Page 89 HIOKI IR4057B961-01...
  • Page 90 HIOKI IR4057B961-01...
  • Page 91 HIOKI IR4057B961-01...
  • Page 92 Rudolf Diese卜 Strasse 5 皿 Ueda, Nagano 386-1192 Japan 65760 Eschborn, Germany hioki@hioki.eu HIOKI IR4057B961-01...

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