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8/12/2019 Analog Multimeter, Measuring DC Voltage
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Basics to MeasuringDC Voltage
1. The Red Meter lead/Probe is
Positive
2. The Black Meter lead/Probe is
Negative
3. There are three meter scales you areworking with
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Each range on the DC display is used for
two positions of the selector switch.
The 10 range is used for 10V and the
1000 Volt selector switch positions The 50 range is used for 0.5V and the
50 Volt selector switch positions
The 250 range is used for 2.5V and the
250 Volt selector switch positions
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This is the position you start with
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Some guideline to following to Protect
the meter when measuring Voltage
You do not want to peg the meter
This means have the needle at full
deflection
Start measuring at highest range of the
selector switch for unknown voltages Pay attention to circuit polarity and
meter lead/probe placement
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Start high on Selector switch and adjust
down to accurately measure voltage
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This is 0.5 DCV on the selector switch
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This is the meter reading. What would you
read if the selector switch was at 0.5 DCV?
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You would use the 50 meter range and
divide by 100 to determine the actual range
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This means 10 = 0.1, 20 = 0.2 etc
The minor increments = .01 VDC
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This meter reading is approximately
0.133 VDC. Can you see it?
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This is 2.5 DCV on the selector switch
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This is the meter reading. What would you
read if the selector switch was at 2.5 DCV?
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You would use the 250 meter range and
divide by 100 to determine the actual range
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This means 50 = 0.5, 150 = 1.5 etc
The minor increments = .01 VDC
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This meter reading is approximately .
0.725 VDC. Can you see it?
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This is 10 DCV on the selector switch
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This is the meter reading. What would you
read if the selector switch was at 10 DCV?
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You would use the 10 meter range
and this would be the actual range
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This means 1 = 1, 8 = 8 etc
The minor increments 0.1 = VDC
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This meter reading is approximately .
2.65 VDC. Can you see it?
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This is 50 DCV on the selector switch
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This is the meter reading. What would you
read if the selector switch was at 50 DCV?
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You would use the 50 meter range
and this would be the actual range
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This means 10 = 10, 30 = 30 etc
The minor increments = 1 VDC.
Do you understand why?
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This meter reading is approximately .
24 VDC. Can you see it?
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This is 250 DCV on the selector switch
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This is the meter reading. What would you
read if the selector switch was at 250 DCV?
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You would use the 250 meter range
and this would be the actual range
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This means 50 = 50, 150 = 150 etc
The minor increments = 5 VDC.
Do you understand why?
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This meter reading is approximately .
225 VDC. Can you see it?
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This is 1000 DCV on the selector switch
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This is the meter reading. What would you
read if the selector switch was at 1000 DCV?
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You would use the 10 meter range multiply
by 100 to determine the actual range
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This means 2 = 200, 8 = 800 etc
The minor increments = 20 VDC.
Do you understand why?
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This meter reading is approximately .
930 VDC. Can you see it?
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Questions?
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The End
Developed and Produced by the
Instructors in the CIE Instruction
Department. 10/2011