NoiseKen INS-4020 Instruction Manual

Impulse noise simulator

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INSTRUCTION MANUAL

IMPULSE NOISE SIMULATOR

INS-4020/4040

MODEL

N O I S E L A B O R A T O R Y C O . , L T D .

E d i t i o n 2 . 0 3

A E B 0 0 3 1 9 - 0 0 E - 1 D

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Summary of Contents for NoiseKen INS-4020

Page 1 INSTRUCTION MANUAL IMPULSE NOISE SIMULATOR INS-4020/4040 MODEL N O I S E L A B O R A T O R Y C O . , L T D . E d i t i o n 2 . 0 3...
Page 2 NOTICE The contents of this booklet are subject to change without prior notice. No part of this booklet may be reproduced or transferred, in any form, for any purpose, without the permission of Noise Laboratory Co., Ltd. The contents of this booklet have been thoroughly checked. However, if a doubtful point, an error in writing or a missing is found, please contact us.
Page 3: Important Safety Precautions
1 IMPORTANT SAFETY PRECAUTIONS This manual contains important information pertaining to the operation and maintenance of your Impulse Noise Simulator Model: INS-4020/4040. In order to obtain the highest performance from this simulator, it is recommended that the contents of this manual be thoroughly understood and used as ready reference for operation and maintenance.
Page 5: Application Form For Instruction Manual
2 APPLICATION FORM FOR INSTRUCTION MANUAL We place an order for an instruction manual. Model: INS-4020/4040 Serial No.: Applicant: Company name: Address: Department: Person in charge: Tel No.: Fax No.: Cut off this page "application form for instruction manual" from this volume and keep it for future use with care.
Page 6 Memorandum...
Page 7: Table Of Contents
3 CONTENTS IMPORTANT SAFETY PRECAUTIONS .............. 1 APPLICATION FORM FOR INSTRUCTION MANUAL ........3 CONTENTS ....................... 5 PREFACE ......................7 BASIC SAFETY PRECAUTIONS ................ 8 Warning signs and their meanings ..............8 Basic safety precautions .................. 8 When warning label is missing ............... 11 Restrictions to comply with CE marking requirements ........
Page 8 10.3 VARIABLE ramp setting ................43 10.4 VARIABLE ramp test run ................45 10.5 PHASE ramp setting ................... 46 10.6 PHASE ramp test run .................. 48 10.7 Combined ramp mode ................. 50 10.8 Remote START and STOP ................51 10.9 Memory function ..................
Page 9: Preface
4 Preface This manual contains important information pertaining to the operation and maintenance of your Impulse Noise Simulator Model: INS-4020/4040. In order to obtain the highest performance from this simulator, it is recommended that the contents of this manual be...
Page 10: Basic Safety Precautions
5 BASIC SAFETY PRECAUTIONS Warning signs and their meanings This sign is shown at areas where HV voltages potentially hazardous to human are present. Sign for caution. For potential dangers or mishandling that could cause injuries or material damage, this instruction manual shall be referred to. Sign for a protective earth terminal.
Page 11 【【【【 Precautions for human body and connection】】】】 4. The coaxial connectors used for this unit is of NoiseKen original design. Use of other type of connectors may cause electric shock hazards or malfunctions of the unit.
Page 12 embedded in the facilities. To avoid these two types of events, use of an isolation transformer is indispensable. Be sure to connect the EUT LINE INPUT to the isolation transformer secondary. 【【【【 Precautions for human body and connection】】】】 When connecting cables and carrying out settings, place the unit in the STOP conditions and interrupt the EUT supply beforehand, otherwise, an electric shock due to high voltage may be caused or the unit may be damaged.
Page 13: When Warning Label Is Missing
environments】】】】 If condensation is found, fully dry the unit before operating it, otherwise, the unit may be damaged or only exhibit limited performance. 【【【【 Precautions for environments】】】】 9. The coaxial connectors used for this unit may have a shortened life due to a poor insulation capability caused by a metal powder accumulation on the connecting part, generated by a frictional wear with insertion and removal.
Page 14: Coaxial Connectors Used For This Product
Coaxial connectors used for this product The coaxial connectors used for this unit is of NoiseKen original design. Use of other type of connectors may cause electric shock hazards or malfunctions of the unit. Be sure to use accessories and options supplied by our company.
Page 15: General Description
EUT for noise testing purpose. Features • Generates pulses of less than 1ns rise time up to 4kV (INS-4040) or up to 2kV (INS-4020). • Selectable pulse widths from 50ns to 1000ns at a step of 50ns, 10ns available as the shortest width.
Page 16: Pulse Generation Principle
Pulse generation principle The main components of the pulse generator circuitry of this unit are coaxial cables, HV power supply, charging resistor, mercury relay and terminating resistor. The coaxial cables form a distributed constant circuit consisting of the inductance of the inner conductor and capacitance of the inner conductor to outer conductor.
Page 17: For Perfect Matching
For perfect matching Pulse waveforms and amplitudes are dependent on the value of a termination resistor being connected to the PULSE OUT terminal. The figures and equation shown below describe these relations. To generate square wave pulses, this unit adopts a 50Ω (strictly, 53.5Ω), equal value to the characteristic impedance of the coaxial cables.
Page 18: Range Of Settings For Pulse And Other Parameters
For details, refer to Section 9.10. (Note 2) The fastest repetition of generated pulses (VARIABLE) is 10ms for INS-4020 and 16ms for INS-4040. This comes from different construction of the two...
Page 19: Included Accessories
7 INCLUDED ACCESSORIES This product includes the following accessories. List of the included accessories Description Quantity Note Coaxial cable 02-00013A 30cm length SG short plug 02-000106A Outlet panel 18-00061B AC240V/16A (Terminal block DC60V/16A maximum type) Leaves the factory with this panel attached to the main unit.
Page 20: Controls And Display Functions
EUT are provided. Front panel connecters and terminals INS-4020/4040 front panel 1. POWER key Controls main POWER on and off. The | side is on position and the 0 side is off position.
Page 21 Pulse injection connector, to L1 Couples to the L1 line of the EUT LINE from 50Ω TERM OUT terminal through a coaxial cable. When conducting normal mode test of pulses being input to the L2 terminal, the supplied SG short plug shall plug the L1 terminal. 9.
Page 22: Front Panel Controls And Displays
When selected, the lamp is lit. Appropriate signal inputs shall be done to the EXT TRIG BNC connector. Their characteristics are 10ms repetition or slower (INS-4020) or 16 ms or slower (INS-4040), 1ms or longer pulse width and negative polarity. (As +5V pull up circuits is built-in, TTL signal or open-collector can be applied.
Page 23 Places the unit in VARIABLE mode: pulses generated irrelevantly to the EUT supply AC frequency. When blinking, change can be done by means of Increment and Decrement buttons from 10ms for INS-4020 or 16ms for INS-4040 to 999ms at 1ms step. Pressing and holding the button enables VARIABLE ramp with the lamp illuminating.
Page 24: Rear Panel
Rear panel INS-4020/4040 rear panel a. AC INPUT AC mains input to operate this unit. The center pin is the protective each conductor. On 100V to 115V operation, the supplied AC cord can be used for connection to an appropriately grounded AC supply. (The unit operates on a range of 100V to 240V AC.
Page 25: Operation
9 OPERATION Observe the Section 1 IMPORTANT SAFETY PRECAUTIONS and Section 4 BASIC SAFETY PRECAUTIONS when conducting a test by using this simulator. Operating precautions As this simulator incorporates a mercury relay, set it horizontally. This unit does not work when it is positioned vertically or considerably on the tilt. Fully put in each coaxial connector and make sure connection by rotating it clockwise until a “click”...
Page 26: Setting The Pulse Width
Setting the pulse width Pulse width can be set by combinations of connections between each PULSE WIDTH connector by using supplied coaxial cables. Examples of setting for 50ns, 350ns, 800ns and 10ns are shown here. Other pulse widths are available with the combinations shown on the table.
Page 27: Setting For 50Ns
9.3.1 Setting for 50ns Connect DC OUT terminal to 50ns IN terminal of PULSE WIDTH, and connect 50ns OUT terminal to PULSE IN terminal by using coaxial cables. DC OUT 50Ω PULSE TERM 400ns 250ns 200ns 100ns 50ns 9.3.2 Setting for 350ns Connect DC OUT terminal to 50ns IN terminal of PULSE WIDTH, connect 50ns OUT terminal to 100ns IN terminal, and connect 100ns OUT terminal to 200ns IN terminal by using coaxial cables.
Page 28: Setting For 800Ns
9.3.3 Setting for 800ns Connect DC OUT terminal to 50ns IN terminal of PULSE WIDTH, connect 50ns OUT terminal to 100ns IN terminal, connect 100ns OUT terminal to 250 ns IN terminal, and connect 250ns OUT terminal to 400ns IN terminal by using coaxial cables.
Page 29: Connecting Termination Resistance
Connecting termination resistance Connect PULSE OUT terminal to 50Ω TERM IN terminal by using a coaxial cable. DC OUT 50Ω PULSE TERM 400ns 250ns 200ns 100ns 50ns The route of the supplied coaxial cables shall be as follows: DC OUT→ PULSE WIDTH (according to the desired pulse width)→ PULSE IN→ PULSE OUT→...
Page 30: Select Injection Line
Select injection line Connect 50Ω TERM OUT terminal to pulse injection terminal (L1, L2, or PE) by using a coaxial cable. WARNING: DO NOT CONNECT A COAXIAL CABLE FOR PULSE WIDTH SELECTION TO SG CONNECTOR. The supplied SG short plug selects the line to which the signal ground of the output pulse is connected.
Page 31 Example: Ground plane reference - L1 common mode DC OUT 50Ω PULSE TERM Short plug 400n 250n 200n 100n Any other connector than the supplied SG short plug shall not be connected to the SG connector of this unit. Do not touch the HV coaxial connectors. Touching a HV connector may cause a shock hazard.
Page 32: Eut Line Input Connection
EUT line input connection Before connecting the equipment under test, check to see that this unit power is turned off and that the EUT supply is interrupted (EUT LINE INPUT), otherwise supply power voltage or the generated pulse voltage may cause an electric shock hazard.
Page 33: Mount And Dismount Outlet Panel
Mount and dismount Outlet panel Checking for the right direction, gently insert the Outlet panel fully to the depth. And press the Outlet panel lock button to lock the Outlet panel and fasten the lock screw. When dismounting, unlock the Outlet panel lock button and remove the lock screw and pull it gently.
Page 34: Operation In Phase Mode
Increment or Decrement button. The maximum pulse output voltages from the INS-4020 and INS-4020 are 2.05kV and 4.10kV, respectively. Operation in PHASE MODE is available when this unit works with an optional external Coupling Unit Model IJ-4050.
Page 35 IMPORTANT The unit does not generate pulses when no AC source is connected to the EUT LINE INPUT terminal or the EUT LINE INPUT power supply is DC (when the frequency of AC supply is out of a 45Hz to 65Hz range), In this case, an Err sign is shown upon pressing the START button.
Page 36: Operation In Variable Mode
AC supply to the EUT LINE. The shortest pulse period varies depending on the product model. When an optional accessory such as Coupling Adaptor or Radiation Probe is used, operate this unit in this mode. The INS-4020 allows 10ms~999ms period and the INS-4040 allows 16ms~999ms.
Page 37: Operation In 1 Shot Mode
9.12 Operation in 1 SHOT mode In this mode, this unit generates single pulse by pressing a button. Each time the 1 SHOT button is pressed, the unit generates a single pulse. When PHASE mode has been selected, pulse generation synchronizes with the AC frequency and its placement can be set on PHASE indicator.
Page 38: Operation In External Trigger Mode
TTL or open-collector, of the negative polarity, 16ms repetition rate or slower for INS-4040 and 10ms or slower for INS-4020. 1) Complete the connection referring to section 1 to 9 (For test set-up, refer to Chapter 10.)
Page 39: Synchronization With Zero-Cross Reference Signal Inputs Form An External Coupling Unit
CDN unit (Option). To do this, place the unit in PHASE mode. Falling edges of the signals with the following period are recognized as zero-cross reference signals for the EUT supply. INS-4020 15.3ms minimum (65Hz) to 22.2 maximum (45Hz) INS-4040 16.0ms minimum (62.5Hz) to 22.2 maximum (45Hz) 1. Complete the connection referring to Section 1 to 9 (For test set-up, refer to Chapter 10.
Page 40: Control By Using A Contact Switch
Signals outside of the aforementioned ranges are regarded as a non-compliant AC, and the unit does not produce pulses, showing Error sign. To return to the normal operation mode, press the STOP button. Check the signal inputs from the Coupling Unit and press the START button again.
Page 41: Stop The Unit
9.14 Stop the unit Pressing the STOP button stops the pulse generation and turns off the START lamp. The high voltage circuitry within the unit turns off but requires approx. 4 seconds to eliminate residual voltages. When changing a connection, allow 5 seconds or more to elapse after pressing the button.
Page 42: Operation For Wide Application
10 OPERATION FOR WIDE APPLICATION 10.1 VOLTAGE ramp setting The output voltage can be automatic ally ramped ac cording to the s etting. The following 5 parameters s hall be s et: initial, final and s tep voltages, test duration for eac h step and interval between each s tep. Voltage ramping enables an automatic test run to the preset final test voltage acc ording to the pres et test duration and interval s ettings.
Page 43 Vo 2 Final voltage 0～ 4.00kV（ 2.00ｋ V） Vo 3 Step voltage 0～ 4.00kV（ 2.00ｋ V） Vo 4 Duration 1～ 999s , manual Vo 5 Interval 1～ 999s , manual and c ontinuous Numbers in parenthes es are for INS-4020...
Page 44: Voltage Ramp Test Run
10.2 VOLTAGE ramp test run The unit exec utes the test according to the s ettings of initial, final and step voltages, test duration for eac h step and interval between eac h s tep 1） Complete the c onnec tion referring to Chapter 8.
Page 45: Variable Ramp Setting
10.3 VARIABLE ramp setting The pulse repetition period can be automatically ramped according to the settings. The following 5 parameters shall be set: initial, final and step periods, test duration for each step and interval between each step. Pulse repetition period ramping enables an automatic tes t run to the pres et final repetition period acc ording to the pres et tes t duration and interval s etting.
Page 46 VARIABLE button lamp is lighted, the unit is in VARIABLE ramp mode. Code Parameter Allowable setting Initial period 16 (10)～ 999 ms Final period 16 (10)～ 999 ms Step period 0～ 999 ms Duration 1～ 999s, manual Interval 1～ 999s, manual and continuous Numbers in parentheses are for INS-4020...
Page 47: Variable Ramp Test Run
10.4 VARIABLE ramp test run The unit executes the test according to the set tings of initial, final and step periods, test duration for each step and interval between each step. 1） Complete the connection referring to Chapter 8. (For test set-up, refer to Chapter 10.) 2）...
Page 48: Phase Ramp Setting
10.5 PHASE ramp setting The placement phase angle can be automatically ramped according to the setting. The following 5 parameters shall be set: initial, final and step angles, test duration for each step and interval between each step. Placement phase angle ramping enables an automatic test run to the pres et final phas e angle acc ording to the pres et tes t duration and interval s etting.
Page 49 6) When any specific duration is set, an interval shall be selected. The first row indicator shows “P-5” Adjust the value by using Increment or Decrement button and press the SET button to confirm the setting. This parameter can also ｏｏｏ...
Page 50: Phase Ramp Test Run
10.6 PHASE ramp test run The unit executes the test according to the set tings of initial, final and step phase angles, test duration for each step and interval between each step. 1） Complete the connection referring to Chapter8. (For test set-up, refer to Chapter 10. 2）...
Page 51 Like in the static PHASE mode, in PHASE ramp mode, the unit generates pulses synchronized with the EUT supply AC frequency or external synchronization signals. The unit does not generate pulses when no AC source is connected to the EUT LINE INPUT terminal or the EUT LINE INPUT power supply is DC (when the frequency of AC supply is out of the 45Hz to 65Hz range), In this case, an Err sign is shown upon pressing the START button.
Page 52: Combined Ramp Mode
10.7 Combined ramp mode Combinations of VOLTAGE ramp with VARIABLE ramp or with PHASE ramp are available. In either combination mode, the unit executes ramping according to the order of selection. For example, when PHASE ramp is set from 0°to 270°at 90°step, and VOLTAGE ramp is set from 1.00kV to 2.00kV at 0.25kV step , VOLTAGE ramp is selected first and PHASE （VARIABLE）ramp is selected next, the unit carries out 1.00kV to 2.00kV ramping at 0.25kV step first all on 0°phase angle and repeat the same voltage ramping this time on 90°...
Page 53: Remote Start And Stop
10.8 Remote START and STOP Instead of pressing the START and STOP buttons, the operator can control the test run by means of the EXT TRG connector. This feature is provided for the purpose of extension of the START and STOP buttons to a remote area. The output voltage, repetition, phase angle and others shall be set by the front panel controls.
Page 54: Memory Function
10.9 Memory function The unit can save the current settings for the output voltage (kV), phase angle (deg), and pulse period (ms) and also the settings for ramp mode. The memory is operative unless the backup battery is discharged. How to save settings 1) Press the MEMORY button.
Page 55: Terminating Resistor
10.10 Terminating resistor 10.10.1 Voltage indicator correction Voltage values shown on the indicator match the actual output when the built-in terminator is connected. The default setting is 53.5 ohm (built-in terminating resistor). While testing with no termination or testing with an optional triangular wave unit, voltages values shown on the indicator are different from the actual output voltages.
Page 56: Setting Of Voltage Indicator Correction
Setting of voltage indicator correction 10.10.2 To utilize this function, a special step when turning on the unit is required. 1） While holding the SET button, turn on the unit. The second row indicator shows the default setting. 2） Select the desired correction by using the Increment or Decrement button.
Page 57: Maximum Voltage For Different Models And Different Settings
The table below shows the maximum values which can be set on the VOLTAGE indicator. Values are different depending on the correction setting. Model 53.5Ω 50.0Ω*1 OPEN Tri *2 (default setting) (Triangular Wave Unit) INS-4020 2.05ｋV 1.98ｋV 4.00ｋV 4.00ｋV INS-4040 4.10ｋV 3.96ｋV 8.00ｋV 6.00ｋV *1 With this setting, an external terminating resistor shall be used instead of the terminating resistor built in the INS unit.
Page 58: Test Set-Ups And Environment
11.4 Test set-ups A recommended test set-up example is shown here. Included are the following main comonents (NoiseKen product model numbers): ・Test table (wooden) (03-00039A)：for the table top equipment under test. A metal sheet working as the ground plane (originally designed for a horizontal coupling plane for indirect application of ESD, model 03-00020A) shall be fixed on the table top.
Page 59 ・ Radiation Probe (01-00006A/7A/8A/9A/10A， H2-B)： for immunity debugging tool on circuit boards, modules, components, etc) INSULATION SHEET INS-4020/4040 GROUND PLANE 0.5m 0.5m± ± ± ± 0.05m 0.05m 0.5m 0.5m 0.05m 0.05m 0.1m 0.1m 0.1m 0.1m ISOLATION TRANSFOMER [Points] 1. A test table shall be installed 0.5m or more distant from surrounding metallic structures such a wall of the room.
Page 60: Test Set-Up
11.5 Test set-up 11.5.1 Line to ground mode (common mode) for AC operated equipment INS-4020/4040 0.5m 0.5m 0.5m 0.5m± ± ± ± 0.05m 0.05m 0.05m 0.05m P L S O U T Ω T E R M I N Ω...
Page 61: Line To Line (Normal Mode) For Ac Operated Equipment
11.5.2 Line to line (normal mode) for AC operated equipment INS-4020/4040 0.5m± ± ± ± 0.05m 0.5m 0.05m 0.5m 0.5m 0.05m 0.05m P L S O U T Ω T E R M I N L I N E I N Ω...
Page 62: Line To Ground Mode (Common Mode) For Dc Operated Equipment
11.5.3 Line to ground mode (common mode) for DC operated equipment INS-4020/4040 0.5m 0.5m 0.5m 0.5m± ± ± ± 0.05m 0.05m 0.05m 0.05m P L S O U T Ω T E R M I N Ω T E R M O U T...
Page 63: Line To Line Mode (Normal Mode) For Dc Operated Equipment
11.5.4 Line to line mode (normal mode) for DC operated equipment INS-4020/4040 0.5m 0.5m± ± ± ± 0.05m 0.5m 0.5m 0.05m 0.05m 0.05m P L S O U T Ω T E R M I N L I N E I N Ω...
Page 64: Capacitive Coupling Test For Signal Lines (By Using Ca-805B Coupling Adapter)
11.5.5 Capacitive coupling test for signal lines (by using CA-805B coupling adapter) INS-4020/4040 P L S O U T Ω T E R M I N More than 0.5m EUT 1 Ω T E R M O U T L I N E I N...
Page 65: Test By Using A Radiation Probe (Optional Accessory)
11.5.6 Test by using a radiation probe (optional accessory) INS-4020/4040 0.5m 0.5m± ± ± ± 0.05m 0.05m 0.5m 0.5m 0.05m 0.05m P L S O U T RADIATION Ω T E R M I N PROBE Ω T E R M O U T...
Page 66: Specifications
(LINE IN) or with external triggers input. 10ms～ 999ms ±10%（ INS-4020） VALIABLE 16ms～ 999ms ±10%（ INS-4040） EXT trigger Period： >10ms（ INS-4020）： >16ms（ INS-4040） Input signal level： TTL/open collector negative logic Pulse width： >1ms Also functions for timing reference signals input from an external injection unit.
Page 67: Consumable Parts
(Noiseken) or the company’s distributor. When users replace the mercury relay, follow the procedures and instructions given in Sections 1 Important Safety Precautions, 13 Relay Unit and 5 Basic Safety Precautions. After replacement, perform a waveform check to Section 12 Waveform check and phase angle correction to Section 14.
Page 68: Waveform Check
Settings on this unit • Pulse width: 1µs • Terminating resistor (VOLTAGE indicator correction): 50.0Ω • Polarity: Positive • Voltage setting: Any voltages (maximum input to the AT-810: 4000V) • Mode: Fastest repetition setting in VARIABLE mode (10ms for INS-4020, 16ms for INS-4040)
Page 69: Checking The Waveform
13.4 Checking the waveform • Disconnect the SG short plug from this unit. The SG short plug is not required for waveform check. • Connect the OUTPUT connector of the AT-810 to a 50 ohm input port of the scope. When the scope does not have 50 ohm input, the AT-810 output shall be connected through an external coaxial 50 ohm terminator.
Page 70: Relay Unit
14.1 2kV relay unit and 4kV relay unit INS-4020 has a 2kV mercury relay unit mounted and INS-4040 model has a 4kV mercury relay unit mounted. The correct type shall be used.
Page 71 IMORTANT IMORTANT IMORTANT IMORTANT After a relay replacement, this unit may exhibit an error of >±10° ( This comes from an individual difference in mercury relays and is not a failure or malfunction. For accurate testing, be sure to carry out the procedures required for angle correction. Mercury is contained in mercury relays, thus the component shall be disposed of in conformity to the local regulations.
Page 72: Phase Angle Correction
• High voltage probe: the minimum input voltage shall be the value of 2.05kV for INS-4020 and 4.1kV for INS-4040 plus the maximum peak value of power supply voltage for the EUT • Regulated AC power source: capable of generating a stable and non-distorted sine waveform.
Page 73: Setting Up Correcting Phase Angle
-Phase angle error at 0.1kV setting -Voltage at 0° reading against 0 ”DEG” setting. -Phase angle error at the maximum output (at 2.05kV for INS-4020 and at 4.1kV for INS-4040) All three points shall be adjusted at one try without pressing the STOP button. Once the STOP button is presses, this unit recognizes an interruption of the procedures and return to the setting prior to the correction setting.
Page 74: Releasing Phase Angle Correction
During the above steps, if events such as that 0°angle placement cannot be obtained from 360 to 390 DEG for phase angle error at 0.1kV setting or that 0°angle placement cannot be obtained from 0 to 30 DEG for phase angle error at the maximum output are encountered, the relay may be defective, requiring a replay replacement or servicing by our company.
Page 76: Warranty
16 WARRANTY Servicing terms The following terms are applicable to servicing by Noise Laboratory Co., Ltd., (hereafter referred to as the Company) provided to maintain the intended performance of its products. Scope The following terms shall apply only to products made by the Company. Technical servicing fee In the event of a failure of a product within the warranty period (see warranty section), the Company will repair a product without charge.
Page 77 Limited warranty Noise Laboratory Co., Ltd. (hereafter referred to as the Company) warrants its products to be free from defects in materials and workmanship under normal use and service for a period of one year from date of delivery. In the event of failure of a product covered by this warranty, the Company will repair the product or may, at its option, replace it in lieu of repair without charge.
Page 78: Maintenance
17 MAINTENANCE When repair, maintenance or internal adjustment of the unit is required, a qualified service engineer takes charge of such work. Maintenance on the user side is restricted to the outside cleaning and functional check of the unit. When checking or replacing the fuse, turn off the switch of the unit and disconnect the plug socket beforehand.
Page 79: Noise Laboratory Support Network
NOISE LABORATORY CO., LTD. SALES DEPT. TEL: +81-42-712-2051 FAX +81-42-712-2050 E-mail: sales@noiseken.com http://www.noiseken.com...
Page 80 NOISE LABORATORY CO., LTD. 1-4-4, CHIYODA, CHUO-KU, SAGAMIHARA CITY, KANAGAWA PREF., 252-0237 JAPAN TEL: +81-42-712-2051 FAX: +81-42-712-2050 URL: http://www.noiseken.co.jp PRINTED IN JAPAN...

This manual is also suitable for:

Ins-4040