It is extremely simple to measure 0-10Vdc signal with a
device that will measure only Current inputs. If Current input module available will
accept a 0-20mA signal, but may not accept a 0-10Vdc signal directly.

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Ohms law states:

I= V/R = 10/500 =

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Ohms law states:

I= V/R = 5/250 =

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The external resistor is a source of error because of its dependency on temperature and its inaccuracy.

In order to obtain measuring results that are as precise as possible it is recommended to use resistors with tolerances that are as small as possible.

Basically,
Ohms law is used to calculate a resistor value in order to convert the 0-10Vdc signal to a current.

**Voltage to Current Conversion Circuit Diagram**

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**Example (0-10 VDC to 0-20 mA)**

**R = V/I**where**V**is the Voltage,**I**is the current and R is the resistance**R**= 10V/0.020A =__500 Ohms__

**0-10 VDC to 0-20 mA Conversion Circuit Diagram**

I= V/R = 0/500 =

**0mA**I= V/R = 10/500 =

**0.02A = 20mA**

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**Example (0-5 VDC to 0-20 mA)**

**R = V/I**where**V**is the Voltage,**I**is the current and R is the resistance**R**= 5V/0.020A =__250 Ohms__

**0-5 VDC to 0-20 mA Conversion Circuit Diagram**

I= V/R = 0/250 =

**0mA**I= V/R = 5/250 =

**0.02A = 20mA**#### Convert 0-20 mA to 0-10 VDC Using Resistor

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**Note:-**

**To avoid damage you must ensure that the external current source has short-circuit protection in all conductor cases.**The external resistor is a source of error because of its dependency on temperature and its inaccuracy.

In order to obtain measuring results that are as precise as possible it is recommended to use resistors with tolerances that are as small as possible.