Introduction Thank you for purchasing Corona Discharge Checker MK-720 hereinafter called “the checker” . To ensure your safety and prevent the danger, please read “Safety Cautions” carefully and make sure to use the checker correctly. ●JFE Advantech cannot accept any responsibility for misuse of this product, for any damaged to the product that occurs during use, for any defects, or for any damages resulting from use of this product, except in cases where it can be proven legally responsible for these.
Safety cautions Some important points to be observed are listed to ensure and correct use of the product. It contains to avoid the danger of harming yourself or others and to avoid the risk of property damage. Read all explanations carefully and make sure to use the checker correctly. Explanation of icon types denotes "points to be careful about." denotes "actions that must be done." denotes "actions that must be avoided.
●Points to remember when using the instrument Ignoring this caution constitutes improper use of the instrument and Wa i : presents a risk of causing fatality or serious injury. Be careful of abnormal conditions. If the checker is used under abnormal conditions, e.g. when the checker is emitting smoke or a strange smell, there is a serious risk of fire or electric shock.
●Points to remember when using the instrument Ca i Ignoring this caution constitutes improper use of the instrument and : presents a risk of causing injury or property damage. Memory protection Make sure to always back up the data to PC or other data storage media. This is necessary because data on the card may become corrupted or lost due to deterioration or other reasons. Data may also be lost if the checker is damaged or repaired.
Cautions on use Since this checker is a precision device, if it is improperly used or roughly handled, it may become damaged or fail to save data correctly. To ensure proper use of the checker, carefully read and observe the following cautions. ●Do not continue using the checker when there is battery completely drained. Data may be lost or corrupted. Replace with a new battery immediately when the battery charge is very low.
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Table of Contents Introduction The outline and measurement principle of the instrument ····· 1 C hapter 1 Preparation before use ················································· 1.1 Names and functions of parts ·················································· 1.2 How to set dry battery ···························································· 1.3 To turn on and to turn off ························································· 1.
Introduction The outline and measurement principle This instrument measures and memorizes the corona discharge accompanying insulated degradation. Insulated degradation is told according to the sound pressure state of corona discharge. If the corona discharge accompanying insulated degradation of AC-power-supply equipment arises, an ultrasonic wave will occur over a broadband.
№ Displayed item Discharge component rate (Intensity rate of double frequency (of power supply) to total intensity) Converted sound pressure of double frequency (of power supply) Level meter(for total ultrasound) 10 step display at measuring range( ) Current measuring range (L, M, H) AUTO range indicator(displayed at Auto range setting) Range over indicator(displayed at range excess at measuring range) Rate excess of double frequency (from preset alarm level) Frequency of currently measuring power supply T
1.3 ◆ To turn on and to turn off To turn on at measuring mode Push red button for 2 seconds or more. Red Clock setting screen is displayed in the case inner clock is reset due to low battery etc. To turn on at setting mode Red White Keep pushing red button and white one until MK-720 turns on. To turn off White Push white button until MK-720 turns off. MK-720 automatically turns off after non-operation for 5 minutes. (MK-720 does not execute automatic power off when it is connected with PC. 1.
1.4.2 ◆◆ Initial setting There are 4 items in initial setting. ・Contrast of display ・Alarm level setting ・Frequency of power supply of object ・Clock setting Screen of MK-720 transitions in the order showed below after turning on at setting mode.
Setting of contrast MK-720 displays [Settings CONTRAST] first after turning on at setting mode. Blue ８ettings （ ４ ３ ９ ７ A ８ ９ ・・・・・・・ :R :⇒ White It is for adjusting of contrast. You can make dark by pushing blue button (12 steps). After push at darkest setting, screen goes to brightest one. MK-720 is set at current contrast setting by one push of white button. MK-720 transitions to [Alarm level setting].
Clock setting MK-720 ”isplays 白 Settings yy/mm/””, hh, mm, ss after three push of white button after turning on at setting mo”e 1. Turn on at setting mo”e. 2. Push white button 3. Push blue button three times to transition to “lo“k setting mo”e for 2 se“on”s or more. （ursor on s“reen appears after releasing of button. 4. Move “ursor by pushing white button . 5. （hange values by pushing blue button . 6. Move “ursor on spa“e for se“on”s, an” push blue button 7.
◆◆ 2.1.2. ７e“ommen”ation of use of earphone We re“ommen” using earphone while “he“king to re”u“e bur”en of “he“king. If you hear low soun” from earphone, see s“reen. ２０-】20 automati“ally turns off after 5 minutes of no operation. ◆ 2.2 （he“king operation by button ◆◆ 2.2.1. ８ensing ５ush re” button. ２０-】20 “ontinues “he“king while you keep pushing re” button. After you release re” button, ２０-】20 in”i“ates ”ata you “he“ke” last. ２０-】20 start sensing again by se“on” push of re” button.
You “an “hoose １ an” W by pushing white button at i”le state. ２０-】20 stores ”ata un”er ”ata number whi“h is ”isplaye” on s“reen. ）ata of Ｌ an” Ｗ is store” un”er ea“h ”ifferent number. ）ata number is automati“ally issue”, an” ”ata number in“reases one by one. You “an freely “hange ”ata number. ４nly at non-measuring “on”ition. Blue button ） A ９ A [１] ３o. :R I ３ ） E X 0 2 5 :: 1. MK-720 swit“hes into ”ata number “hanging mo”e by pushing blue button for 2 se“on”s or more.
（hapter 3. ）ata “ommuni“ation MK-720 is able to sen” memorize” measuring re“or” to “omputer via USB “able. ◆ 3.1. ８ystem requirements To utilize ”ata on P（, MK-720 requires environments showe” below. Item Re“ommen”e” environments OS Win”ows XP Ex“el Ex“el2002 2003 2007 2010 （omputer whi“h enables normal operation of Win”ows an” Ex“el （）-ROM ”rive for installation only （omputer ）isk ”rive ◆ ◆◆ 3.2. Vista 7 Installation of ”river software 3.2.1.
（li“k ）evi“es an” ５rinters on Win”ows 】, an” ”o On Win”ows 】 ４n Win”ows Vista ）evi“e ２anager on Win”ows Vista ７ight “li“k ２０-】20 U８B ”river in ４ther ”evi“es an” ”o Up”ate ）rive ８oftware . In the “ase you “annot fin” Up”ate ）rive ８oftware , please retry after a few se“on”s later.
10 （li“k Browse button an” “hoose the fol”er whi“h has ”river software. ２０-】20_U８B_”river .) （li“k ３ext button after sele“tion of fol”er. 11 （li“k 12 Installation of ”river software shall start 13 （li“k 14 ４pen Install this ”river software anyway （lose at the “ase that se“urity warning win”ow appears. button. （ontrol panel (Most “ommon “hoi“e is to install U８B serial port.
15 ７ight-“li“k U８B ８erial ５ort in ４ther ”evi“es at software . (In the “ase that you “annot fin” Up”ate ）river ８oftware ）evi“e ２anager , an” “li“k Up”ate ”river , please retry after a few se“on”s later. 1【 Install in the same way as pro“e”ure showe” from 1】 （li“k 1】 （onfirm ２０-】20 U８B ８erial ５ort (（４２ X) (☆ X is numeri“) is a””e” in ５orts(（４２ & １５９) at ）evi“e ２anager . ９ake note of the number X . （４２ number will be require” to utilize ）ownloa” sheet .
◆◆ 3.2.1. For Win”ows X５ ８et installation ”isk on ”isk ”rive of the “omputer. （onne“t U８B port of “omputer an” that of ２０-】20 with U８B “able. ９urn on ２０-】20 by pushing re” button for 2 se“on”s or more. （omputer will ”isplay Foun” ３ew Har”ware Wizar” . （hoose Install from a list of spe“ifi“ lo“ation [A”van“e”] an” “li“k ３ext . （hoose ８ear“h for the best ”river in these lo“ations. an” “he“k on boxes ( ８ear“h removable me”ia [floppy, （）-７４２...] an” In“lu”e the lo“ation in the sear“h: ) .
（li“k （ontinue anyway . ５lease negle“t warning ”ialogue win”ow for this “ase. Installation of ”river software shall start. （li“k Finish button after “ompletion of ”river software installation.
Foun” ３ew Har”ware Wizar” shall be ”isplaye” after “li“king of a list of spe“ifi“ lo“ation [A”van“e”] an” “li“k ３ext . 10 Install in the same way as pro“e”ure showe” from 11 （li“k （lose 12 ４pen （ontrol ５anel . 13 （li“k to Finish . button after “ompletion of ”river software installation. ５erforman“e an” ２aintenan“e 。 in step .
14 15 （li“k ８ystem . ８ystem properties ”ialogue box will open. （li“k Har”ware tab an” ”o ）evi“e manager .
1【 （onfirm ２０-】20 U８B ８erial ５ort (（４２ X) (☆ X is numeri“) is a””e” in ５orts(（４２ & １５９) at ）evi“e ２anager . ９ake note of the number X . （４２ number will be require” to utilize ）ownloa” sheet . ９his （４２ number ”iffers by “omputer by “omputer. 3.2. How to use ”ownloa” sheet (Ex“el files ４pen ２０-】20 ”ata ”ownloa” sheet . MK-720 requires Mi“rosoft Ex“el version Ex“el 2002, 2003, 2007, an” 2010. at use of Ex“el software. ２０-】20 ”ata ”ownloa” sheet.
（onne“t U８B port of “omputer an” that of ２０-】20 with U８B “able. ９urn on ２０-】20 by pushing re” button for 2 se“on”s or more. ２０-】20 will automati“ally ”isplay U８B ）４W３１４A） . U８B ） ４ W ３ １ ４ A ） ７ea”y （li“k ）ownloa” button on ）ownloa”ing shall start. ）ownloa” sheet .
９o “lear “urrently ”isplaye” ”ata, “li“k （lear button. 。 ９o store ”ownloa”e” ”ata, save ”atasheet with naming. ）ata store” in MK-720 is not “leare” by ”ownloa”ing. To “lear ”ata in MK-720, ”o in pro“e”ure written in page 12. ●９o enable ma“ro fun“tion （omputer may ”isplay warning about ma“ro fun“tion at opening ”ownloa”ing sheet (Ex“el file). Set ma“ro or “ontents enable for this “ase. (1) ＋or Ex“el2007 an” Ex“el2010 （li“k Enable “ontent button on yellow bar on the top of ”isplay.
（hapter 4 ９roubleshooting （he“k this list first for the “ases whi“h are to be “onsi”ere” as malfun“tions. If any “ase whi“h is not in this list o““urs, or if the “ase it is not re“overe” even after “ountermeasure shown here, “onta“t the agent from whi“h you pur“hase”. In the “ase you ha” pur“hase” from us ”ire“tly, please sen” email to us. Please kin”ly let us know the mo”el name, type number, an” symptoms at “onta“ting us. Symptoms Mk-720 “annot be powere” up.
（hapter 5 ◆ ８pe“ifi“ation 5.1. Har”ware ８pe“ifi“ations Imputting part Measuring part Sensor type Sensing “enter frequen“y ）ete“tion sensitivity ）ire“tivity Piezoele“tri“ type 40k－z -63③3”B @30“m As sensor ③8 Laser pointer Semi“on”u“tor laser ”io”e 1Mw (（lass 2 JIS （ 6802 an” IE（ 6825-1 Sampling frequen“y Number of sample ”ata ＋requen“y range Resolution A/） “onversion ）ynami“ range Win”ow ）isplay （ontents Outputting part Buzzer (for alarming), Earphone ja“k (Signal output terminal, 3.
◆ 5.3. ８tan”ar” “onfiguration （orona ”is“harge “he“ker MK-720 1 unit AA Alkaline ”ry battery LR6A， 4 ea. USB “able KU-SLAMB510BK 1 ea. （ommuni“ation software (in 1 （） MK-9804 1 ea. Earphone ME-L82 1 ea. Strap 1 ea. Instru“tion manual 1 ea. ◆ 5.4.
