8840A

DMM, Fluke 8840A

1. 링크
   1. 전자부품
      1. DMM
         1. 8840A - 이 페이지
         2. 8842A
2. FLUKE 8840A
   1. 설명
      1. 8842A보다 측정범위가 낮은값에서 한 단계 좁다.
      2. 0.005%. DCV 200m,2,20,200,1000V / DCA 2A / R 200,2k,20k,200k,2M,20M
      3. Option -05 GPIB
      4. Option -09 RMS AC(ACV ACI)
   2. 이력
      1. 18/04/20 - 총 64,179원
      2. 18/05/14 투고기술에 도착함. 100V를 220V로 변경하고 DC전압 측정. 문제없음
   3. 내부
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        윗면

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        아랫면, 옵션 GPIB보드, 옵션 AC 측정보드가 있다.

   4. 메인 보드
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        Front/Rear Switch

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        전류측정 저항

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        Fluke 715680 ADC

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        Motorola SZA263 (=LTFLU) 전압표준

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        SR0085V2-3 MCU(~Z80), D8279C Keyboard/Display Controller, : Intersil X2804AP EEPROM 512 Byte Calibration Memory

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        bend up 90', sheild A/D (=L-shaped shield plate)

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        Dionics Di514BR High Voltage VF Display Driver, EL SALVADOR SN74LS248 BCD-to-7Segment Decoders/Drivers, SN74LS259 8-Bit Addressable Latch, UDN2585A 8-ch Source Drivers

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        Fluke 700013 Quad Analog Switch

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        voltage divider, precision resistors networks

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        AD40323, three-pole, low-pass analog filter, Bessel response with corner frequency at 7 Hz, giving approximately 50 dB of rejection at 50 Hz.

   5. 옵션 GPIB보드, IEEE-488 Interface PCA
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        MC3447 bidirectional bus transceiver

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        SR0086V-4 GPIB IC, MDP1603(16pin 03 isolated) MDP1401(14pin 01 bussed)

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        1984 John Fluke Mfg Co Inc

   6. 옵션 AC 측정보드, Option -09, True RMS AC circuit
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        AC 전압범위에 따라 /500 /5 낮추고, x0.5, x5, x500 높인 후 RMS 변환한다.

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        1.11M, 222k, 2.245k

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        R7032-1, R8378-1 reed relay

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        LF356N JFET Input Operational Amplifiers, DG211CJ Quad SPST CMOS Analog Switches, NE5532N Dual Low Noise Operational Amplifier

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        AD637JD High Precision, Wideband RMS-to-DC Converter