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How do I read this?

DUBER
By DUBER
in Hobby Electronics
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Go to solution Solved by -rascal-,

Well, you are NOT measuring current (uA, mA, or A) right now.

You are measuring voltage (mV, V, etc).

 

Since you set the scaling to 'DC' and '10V' then you read the 0 ~ 10 set of numbers, and the "middle?" scale.

It is reading 4.2V.
Red is for AC voltage, black is for DC voltage.

 

image.png.6e9818e6e662fdfc130178ac9a4c339a.png

 

https://www.webassign.net/labsgraceperiod/ncsulcpmech2/appendices/appendixK/appendixK.html

If you want to measure voltage, you connect the + and - wires in parallel.
Lab K - Using a Mutimeter

 

If you want to measure current, you connect the + and - wires in series.

figure3.png

 

Posted

For context, I'm trying to measure the current from my E scooter hall effect sensor. 

I believe my sensors work off binary as in one hall effect sensor is on at any one time. Rather than analogue. 

Idk if I'm reading the current measuring device right, but I think it's giving me around 4.8v or 4.9 for the main power cables.

20230622_095940.jpg

20230622_095906.jpg

20230622_095856.jpg

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Posted

Looks like that is on the 4.8 volt mark to me. Since you are on the 10 VDC range you should be reading the 10 VDC scale obviously, so you are reading it correctly.

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Posted

@DUBER those first two are slightly less, they look closer to 4.6, but it could be the angle of the picture? I primarily looked at the last one. Doesn't sound like your measurement is that critical.

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Posted
  • Solution

Well, you are NOT measuring current (uA, mA, or A) right now.

You are measuring voltage (mV, V, etc).

 

Since you set the scaling to 'DC' and '10V' then you read the 0 ~ 10 set of numbers, and the "middle?" scale.

It is reading 4.2V.
Red is for AC voltage, black is for DC voltage.

 

image.png.6e9818e6e662fdfc130178ac9a4c339a.png

 

https://www.webassign.net/labsgraceperiod/ncsulcpmech2/appendices/appendixK/appendixK.html

If you want to measure voltage, you connect the + and - wires in parallel.
Lab K - Using a Mutimeter

 

If you want to measure current, you connect the + and - wires in series.

figure3.png

 

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Posted
6 minutes ago, -rascal- said:

Red is for AC power, black is for DC.

Voltage, not power.

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1 minute ago, mirachu said:

Voltage, not power.

 

Whoops, brain moving faster than the fingers.

Good catch.

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Posted
  • Author

thank you so much! @-rascal-

i'm going to try again but measure the current now! 

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  • Author
5 minutes ago, DUBER said:

thank you so much! @-rascal-

i'm going to try again but measure the current now! 

Wait, can I even measure current. I'm so confused now 😖 why does AC.v work?

@-rascal-

20230622_105029.jpg

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Posted
7 hours ago, DUBER said:

Wait, can I even measure current. I'm so confused now 😖 why does AC.v work?

@-rascal-

 

 

Depends on how your E-scooter is wired to work.

Make sure you are measuring the correct part of the circuit.

 

Just an example (because I don't own an E-bike or E-scooter):

 

If your E-scooter is anything like what is in the video, the DC input, is used to power a three-phase motor.

As a result, you will get AC readings on the output side.

Intel Z390 Rig ( *NEW* Primary )

Intel X99 Rig (Officially Decommissioned, Dead CPU returned to Intel)

  • i7-8086K @ 5.1 GHz
  • Gigabyte Z390 Aorus Master
  • Sapphire NITRO+ RX 6800 XT S.E + EKwb Quantum Vector Full Cover Waterblock
  • 32GB G.Skill TridentZ DDR4-3000 CL14 @ DDR-3400 custom CL15 timings
  • SanDisk 480 GB SSD + 1TB Samsung 860 EVO +  500GB Samsung 980 + 1TB WD SN750
  • EVGA SuperNOVA 850W P2 + Red/White CableMod Cables
  • Lian-Li O11 Dynamic EVO XL
  • Ekwb Custom loop + 2x EKwb Quantum Surface P360M Radiators
  • Logitech G502 Proteus Spectrum + Corsair K70 (Red LED, anodized black, Cheery MX Browns)

AMD Ryzen Rig

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  • Gigabyte B550 Aorus Pro AC
  • 32GB (16GB X 2) Crucial Ballistix RGB DDR4-3600
  • Gigabyte Vision RTX 3060 Ti OC
  • EKwb D-RGB 360mm AIO
  • Intel 660p NVMe 1TB + Crucial MX500 1TB + WD Black 1TB HDD
  • EVGA P2 850W + White CableMod cables
  • Lian-Li LanCool II Mesh - White

Intel Z97 Rig (Decomissioned)

  • Intel i5-4690K @ 4.8 GHz
  • ASUS ROG Maximus VII Hero Z97
  • Sapphire Vapor-X HD 7950 EVGA GTX 1070 SC Black Edition ACX 3.0
  • 20 GB (8GB X 2 + 4GB X 1) Corsair Vengeance DDR3 1600 MHz
  • Corsair A50 air cooler  NZXT X61
  • Crucial MX500 1TB SSD + SanDisk Ultra II 240GB SSD + WD Caviar Black 1TB HDD + Kingston V300 120GB SSD [non-gimped version]
  • Antec New TruePower 550W EVGA G2 650W + White CableMod cables
  • Cooler Master HAF 912 White NZXT S340 Elite w/ white LED stips

AMD 990FX Rig (Decommissioned)

  • FX-8350 @ 4.8 / 4.9 GHz (given up on the 5.0 / 5.1 GHz attempt)
  • ASUS ROG Crosshair V Formula 990FX
  • 12 GB (4 GB X 3) G.Skill RipJawsX DDR3 @ 1866 MHz
  • Sapphire Vapor-X HD 7970 + Sapphire Dual-X HD 7970 in Crossfire  Sapphire NITRO R9-Fury in Crossfire *NONE*
  • Thermaltake Frio w/ Cooler Master JetFlo's in push-pull
  • Samsung 850 EVO 500GB SSD + Kingston V300 120GB SSD + WD Caviar Black 1TB HDD
  • Corsair TX850 (ver.1)
  • Cooler Master HAF 932

 

<> Electrical Engineer , B.Eng <>

<> Electronics & Computer Engineering Technologist (Diploma + Advanced Diploma) <>

<> Electronics Engineering Technician for the Canadian Department of National Defence <>

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