How to **Convert 0-20 mA to 0-10 VDC** Using Resistor ? In this post we discuss with easy examples and diagrams.

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

# How to Convert 0-20 mA to 0-10 VDC Using Resistor

Basically, Ohms law is used to calculate a resistor value in order to convert the 0-20ma signal to a voltage.

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

Ohms law states: **R = V/I** where **V** is the Voltage, **I** is the current and R is the resistance

**R** = 10V/0.020A = 500 Ohms

V = I*R = 0*500 = 0V

V = I*R = 0.020*500 = 10V

**Example (4-20 mA to 2-10 VDC)**

Ohms law states: **R = V/I** where **V** is the Voltage, **I** is the current and R is the resistance

**R** = 10V/0.020A = 500 Ohms

V = I*R = 0.004*500 = 2V

V = I*R = 0.020*500 = 10V

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

Ohms law states: **R = V/I** where **V** is the Voltage, **I** is the current and R is the resistance

**R** = 5V/0.020A = 250 Ohms

V = I*R = 0*250 = 0V

V = I*R = 0.020*250 = 5V

# Convert 0-10 VDC to 0-20 mA Using Resistor

**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.