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HP 4278A 1kHz/1MHz C 미터 - 편집 역사
2026-04-26T12:02:39Z
이 문서의 편집 역사
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2024년 8월 26일 (월) 11:08에 Togotech님의 편집
2024-08-26T11:08:38Z
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← 이전 판</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">2024년 8월 26일 (월) 11:08 판</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >1번째 줄:</td>
<td colspan="2" class="diff-lineno">1번째 줄:</td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">LCR-</del>4278A</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">HP </ins>4278A <ins class="diffchange diffchange-inline">1kHz/1MHz C 미터</ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><ol></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><ol></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><li> [[<del class="diffchange diffchange-inline">LCR-</del>4278A]] - 이 페이지</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><li> [[<ins class="diffchange diffchange-inline">HP </ins>4278A <ins class="diffchange diffchange-inline">1kHz/1MHz C 미터</ins>]] - 이 페이지</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></ol></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></ol></div></td></tr>
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Togotech: Togotech님이 LCR-4278A 문서를 HP 4278A 1kHz/1MHz C 미터 문서로 이동했습니다
2024-08-26T11:07:28Z
<p>Togotech님이 <a href="/index.php/LCR-4278A" class="mw-redirect" title="LCR-4278A" data-bs-title="LCR-4278A">LCR-4278A</a> 문서를 <a href="/index.php/HP_4278A_1kHz/1MHz_C_%EB%AF%B8%ED%84%B0" title="HP 4278A 1kHz/1MHz C 미터" data-bs-title="HP_4278A_1kHz/1MHz_C_미터">HP 4278A 1kHz/1MHz C 미터</a> 문서로 이동했습니다</p>
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<td colspan="1" style="background-color: #fff; color: #222; text-align: center;">2024년 8월 26일 (월) 11:07 판</td>
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2022년 10월 29일 (토) 11:26에 Togotech님의 편집
2022-10-29T11:26:13Z
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<a href="//www.togotech.co.kr/index.php?title=HP_4278A_1kHz/1MHz_C_%EB%AF%B8%ED%84%B0&diff=61988&oldid=22048">차이 보기</a>
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Togotech: 새 문서: LCR-4278A <ol> <li> , LCR <li>4278A 1kHz/1MHz C미터 <ol> <li>2936J03320 <ol> <li>이력 <ol> <li>opt 002 = 1MHz only <li>2015/11/07 24대 구입품 중 하나. <li>HPIB 통신...
2019-07-05T03:58:29Z
<p>새 문서: LCR-4278A <ol> <li> , <a href="/index.php/LCR" class="mw-redirect" title="LCR" data-bs-title="LCR">LCR</a> <li>4278A 1kHz/1MHz C미터 <ol> <li>2936J03320 <ol> <li>이력 <ol> <li>opt 002 = 1MHz only <li>2015/11/07 24대 구입품 중 하나. <li>HPIB 통신...</p>
<p><b>새 문서</b></p><div>LCR-4278A <br />
<ol><br />
<li> , [[LCR]]<br />
<li>4278A 1kHz/1MHz C미터<br />
<ol><br />
<li>2936J03320<br />
<ol><br />
<li>이력<br />
<ol><br />
<li>opt 002 = 1MHz only<br />
<li>2015/11/07 24대 구입품 중 하나.<br />
<li>HPIB 통신 안됨.(통신되는 HPIB 보드 꼽아도)<br />
<li>유효한 값이 나오지 않았는데, cal. data를 reset하니 정상.<br />
<li>Self Test에서 문제를 18/03/12 해결함<br />
</ol><br />
<li>15/11/10 BNC 포트 수리함<br />
<gallery><br />
image:4278a1_001.jpg | 찌그러져 있음<br />
image:4278a1_002.jpg<br />
image:4278a1_003.jpg | 수리함<br />
</gallery><br />
<li>18/03/11 내부 사진 촬영<br />
<ol><br />
<li>Selt Test에서 문제 발생됨.<br />
<gallery><br />
image:4278a1_046.jpg | 8번부터 1번까지 실시한다.<br />
image:4278a1_045.jpg | 4번 문제 때문에<br />
image:4278a1_004.jpg | 2번 문제도 발생한다.<br />
image:4278a1_026.jpg | 이 때 A3 보드, R30, R31 조정한다.<br />
image:4278a1_047.jpg | <0.00003 될때까지 조정한다.<br />
image:4278a1_048.jpg | 2번 문제가 해결되었다.<br />
</gallery><br />
<li>전체<br />
<gallery><br />
image:4278a1_049.jpg | 조정후<br />
image:4278a1_005.jpg | A4 보드(1KHz 발생)가 없다.<br />
</gallery><br />
<li>A1 power supply<br />
<gallery><br />
image:4278a1_006.jpg<br />
image:4278a1_007.jpg<br />
image:4278a1_008.jpg | 4A T(시간 지연형) 퓨즈<br />
image:4278a1_009.jpg | 퓨즈<br />
image:4278a1_010.jpg | 아이솔레이션<br />
</gallery><br />
<li>A2 Signal Source<br />
<gallery><br />
image:4278a1_011.jpg<br />
image:4278a1_012.jpg | 8MHz (2,500,8로 나눈다.)<br />
image:4278a1_013.jpg<br />
image:4278a1_014.jpg | OSC 레벨 선택<br />
image:4278a1_015.jpg<br />
image:4278a1_016.jpg | MC14051B - Analog Multiplexers/Demultiplexers<br />
image:4278a1_017.jpg<br />
image:4278a1_018.jpg<br />
image:4278a1_019.jpg<br />
</gallery><br />
<li>A3 MHz Transducer<br />
<ol><br />
<li>중요 3부분<br />
<ol><br />
<li>1st null amplifier<br />
<li>I-V converter<br />
<li>C-offset circuit<br />
</ol><br />
<li>사진<br />
<gallery><br />
image:4278a1_020.jpg<br />
image:4278a1_021.jpg<br />
image:4278a1_022.jpg<br />
image:4278a1_023.jpg<br />
image:4278a1_024.jpg<br />
image:4278a1_025.jpg<br />
image:4278a1_026.jpg<br />
image:4278a1_027.jpg<br />
image:4278a1_028.jpg<br />
image:4278a1_029.jpg<br />
image:4278a1_030.jpg<br />
</gallery><br />
</ol><br />
<li>A4 1KHz Transducer - 없음<br />
<li>A5 switching matrix / phase detector<br />
<gallery><br />
image:4278a1_031.jpg<br />
image:4278a1_032.jpg<br />
image:4278a1_033.jpg<br />
image:4278a1_034.jpg<br />
</gallery><br />
<li>A6 4ch A-D converter<br />
<gallery><br />
image:4278a1_035.jpg<br />
image:4278a1_036.jpg<br />
image:4278a1_037.jpg<br />
image:4278a1_038.jpg<br />
image:4278a1_039.jpg | diode array(6개) 4개만 사용<br />
</gallery><br />
<li>A7 digital control<br />
<gallery><br />
image:4278a1_040.jpg | CPU, ROM, EEPROM(cal.데이터저장), RAM<br />
image:4278a1_041.jpg | 종래 주변 논리회로를 ASIC화(매뉴얼에 없음)<br />
image:4278a1_042.jpg<br />
image:4278a1_043.jpg | MC68000 8MHz<br />
</gallery><br />
<li>A20 HP-IB, Option 101 현재 4284A용 HP-IB 보드가 꼽혀 있음<br />
<gallery><br />
image:4278a1_000.jpg<br />
image:4278a1_044.jpg<br />
</gallery><br />
</ol><br />
</ol><br />
<li>2936J03485 투고기술 프로그래밍용<br />
<ol><br />
<li>이력<br />
<ol><br />
<li>15/11/07 24대 구입품 중 하나.<br />
<li>스캐너 인터페이스 카드 있음.<br />
<li>핸들러 인터페이스 카드 있음.<br />
<li>HP-IB 인터페이스 카드 있음. 잘됨.<br />
</ol><br />
<li>18/03/12<br />
<ol><br />
<li>Self Test #6 에서 오류. -> A6(A-D converter) 보드를 바꿔라.<br />
<gallery><br />
image:4278a2_001.jpg | 측정 문제점을 현재 발견할 수 없음.<br />
</gallery><br />
<li>A4 보드, 1kHz Trasnducer 보드<br />
<ol><br />
<li>전체<br />
<gallery><br />
image:4278a2_002.jpg<br />
</gallery><br />
<li>윗면 가드 링<br />
<gallery><br />
image:4278a2_003.jpg | (Harris, Intersil, Renesas Hi1-201-5, quad SPST, 185ns) (NE5532P Dual Low-Noise Operational Amplifiers) (TL071 Low-Noise JFET-Input Operational Amplifiers)<br />
image:4278a2_004.jpg<br />
image:4278a2_005.jpg<br />
image:4278a2_006.jpg<br />
image:4278a2_007.jpg<br />
image:4278a2_008.jpg<br />
</gallery><br />
<li>아랫면 가드 링<br />
<gallery><br />
image:4278a2_012.jpg<br />
image:4278a2_009.jpg<br />
image:4278a2_010.jpg<br />
image:4278a2_011.jpg<br />
image:4278a2_013.jpg<br />
image:4278a2_014.jpg<br />
</gallery><br />
</ol><br />
</ol><br />
</ol><br />
<li>2936J03501 - 판매해서 없음<br />
<ol><br />
<li>14년 1월 25일 창고에서<br />
<li>15년<br />
<gallery><br />
image:150123_152040.jpg | 15/01/23<br />
image:150221_091224.jpg | 15/02/21 4279A와 서로 비교해서 수리시작<br />
</gallery><br />
<li>전원보드 점검 - 굵은선에서 갑자기 가늘어진 부분이 부식되어 끊어짐<br />
<gallery><br />
image:150221_094336.jpg<br />
image:150221_094406.jpg<br />
image:150221_094436.jpg<br />
image:150221_094504.jpg<br />
image:150221_094548.jpg<br />
</gallery><br />
<li>전원보드 수리후 전원을 켜니 LCD 고장<br />
<gallery><br />
image:150221_095050.jpg<br />
image:150221_101638.jpg<br />
image:150221_101944.jpg<br />
image:150221_101950.jpg<br />
image:150221_102004.jpg<br />
image:150221_104006.jpg | LCD 교체하니 정상.<br />
</gallery><br />
<li>15/10/23 측정 시스템 개발에 이 계측기를 이용함. <br />
<ol><br />
<li>15/10/27 제이즈 비용 지불 - 3,050,000 + 305,000 = 3,355,000원<br />
<li>15/12/30 12/01 발행날짜 3,355,000원 세금계산서 받음<br />
<li>16/03/22 노트북2대+개발비=720만원, 720-305=415만원(부가세별도)을 지불함.<br />
</ol><br />
<li>15/11/07 판매용으로 점검<br />
<gallery><br />
image:4278a3_001.jpg<br />
image:4278a3_002.jpg<br />
</gallery><br />
<li>15/11/30 설치<br />
<gallery><br />
image:4278a3_003.jpg<br />
image:4278a3_004.jpg<br />
</gallery><br />
<li>16/02/16 <br />
</ol><br />
</ol><br />
</ol></div>
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