Difficulty
Moderate
Steps
5
Time Required
10 - 15 minutes
Sections
1
- Velleman DVM850BL Digital Multimeter Teardown
- 5 steps
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BackVelleman DVM850BL Digital Multimeter
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Introduction
What you need
Step 1
Removing Leads
- Remove lead connectors from front panel.
Remove lead connectors from front panel.
1024
Step 2
Remove Back Casing Screws
- Turn over the DVM and unscrew the two screws using a J1 bit.
Turn over the DVM and unscrew the two screws using a J1 bit.
Step 3
Battery and PCB Screw Removal
- Remove battery by gently disconnecting it from connector.
- Remove three screws using J1 bit.
Remove battery by gently disconnecting it from connector.
Remove three screws using J1 bit.
Step 4
PCB Removal
- Remove PCB by gently pulling it away from the back encasing.
- Microprocessor
- Continuity Check Speaker
- Fuse
- 9 V Battery Connector
Remove PCB by gently pulling it away from the back encasing.
Microprocessor
Continuity Check Speaker
Fuse
9 V Battery Connector
Step 5
Complete The Teardown
- 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.
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.
Cancel: I did not complete this guide.
Author
with 2 other contributors
Michael
Member since: 01/23/2014
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Team
Cal Poly, Team 10-32, Maness Winter 2014
Member of Cal Poly, Team 10-32, Maness Winter 2014
CPSU-MANESS-W14S10G32
4 Members
6 Guides authored
Oliver Watson - Dec 14, 2016
Reply
Don’t take the contacts out of the rotary dial. It’s very easy to forget where they go
jaystuarthenderson - Jun 20, 2022
Reply
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