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Velleman DVM850BL Digital Multimeter Teardown

Introdução

This teardown shows the internal circuitry of a digital multimeter.

O que você precisa

  1. Velleman DVM850BL Digital Multimeter Teardown, Removing Leads: passo 1, imagem 1 %32

    • Remove lead connectors from front panel.

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  2. Velleman DVM850BL Digital Multimeter Teardown, Remove Back Casing Screws: passo 2, imagem 1 %32 Velleman DVM850BL Digital Multimeter Teardown, Remove Back Casing Screws: passo 2, imagem 2 %32 Velleman DVM850BL Digital Multimeter Teardown, Remove Back Casing Screws: passo 2, imagem 3 %32

    • Turn over the DVM and unscrew the two screws using a J1 bit.

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  4. Velleman DVM850BL Digital Multimeter Teardown, Battery and PCB Screw Removal: passo 3, imagem 1 %32 Velleman DVM850BL Digital Multimeter Teardown, Battery and PCB Screw Removal: passo 3, imagem 2 %32 Velleman DVM850BL Digital Multimeter Teardown, Battery and PCB Screw Removal: passo 3, imagem 3 %32

    • Remove battery by gently disconnecting it from connector.

    • Remove three screws using J1 bit.

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  5. Velleman DVM850BL Digital Multimeter Teardown, PCB Removal: passo 4, imagem 1 %32 Velleman DVM850BL Digital Multimeter Teardown, PCB Removal: passo 4, imagem 2 %32

    • Remove PCB by gently pulling it away from the back encasing.

    • Microprocessor

    • Continuity Check Speaker

    • Fuse

    • 9 V Battery Connector

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  6. Velleman DVM850BL Digital Multimeter Teardown, Complete The Teardown: passo 5, imagem 1 %32 Velleman DVM850BL Digital Multimeter Teardown, Complete The Teardown: passo 5, imagem 2 %32 Velleman DVM850BL Digital Multimeter Teardown, Complete The Teardown: passo 5, imagem 3 %32

    • Remove the knob and buttons from the front grey casing.

    • The measurement knob uses two ball bearings that allows the knob to rotate. These bearings are small and easy to lose.

    • Backlight Toggle Button

    • Measurement Hold Button

    • LCD Plastic Cover

    • Measurement Select Knob

    • Measurement Select Knob Ball Bearings

    • Success! You have finished tearing down the multimeter.

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Autor(a)

com 2 outros contribuidores

Michael

Membro desde: 01/23/14

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Equipe

Cal Poly, Team 10-32, Maness Winter 2014 Membro de Cal Poly, Team 10-32, Maness Winter 2014

CPSU-MANESS-W14S10G32

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Autoria de 6 guias

2 comentários

Don't take the contacts out of the rotary dial. It's very easy to forget where they go

Oliver Watson - Responder

This web page seems very helpful. However is it necessary to remove the micro processor or front knobs and buttons if all is working fine? What meter do you use to check the fuse? This one when the battery is changed? LOL And why does the print and photos change size when I try to scroll down the page after I reset it to 100 % ? Am I using Windows 10 wrong? Thanks

jaystuarthenderson - Responder

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