Getting Started With 4 – 20mA Signal Generator Part-2

In part 1 we will already explain what 4-20mA signal and Technical specification and their applications. Now we are going with other features of a 4-20mA signal generator.

How to set Fine and Coarse Adjustments?

The Coarse Adjustment means it covers the Entire range from minimum to maximum, In contrast, the fine adjustment only covers a fraction of the entire range. For Fine-tuning and Coarse-tuning, Rotate the Knob clockwise for “+”, and Anticlockwise for “-” Press and hold the Knob for 2 seconds to enter the parameter setting mode.

Coarse Adjustment:

  • To enter the Coarse tuning parameter setting press and hold the Knob for 2 seconds, and enter the password “+–+”
    • Now when we enter the F001 Mode rotate the Knob to set the Mode in “0” mode 
    • Next rotate the Knob in clockwise to  enter to that F004 Mde 
    • This F004 Mode have coarse tuning setting from 1-50 digits
    • If we set the coarse tuning value 10, then current varies from 10mA to 11mA, similar for other ranges(1-50)

Fine Adjustment:

  • To enter the Coarse tuning parameter setting press and hold the Knob for 2 seconds, and enter the password “+–+”
    • Now when we enter the F001 Mode rotate the Knob to set the Mode in “1” mode  by rotating the Knob.
    • Next rotate the Knob in clockwise to  enter to that F005 Mde 
    • This F004 Mode have coarse tuning setting from 1-50 digits
    • If we set the coarse tuning value 10, then current varies from 10.08mA to 10.18mA, similar for other ranges(1-50)
Fine-tuning By rotating the Knob
Generating 4-20mA signal by varying Knob using a multimeter

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How to generate Curve Waves?

To generate the Curve waves from the signal generator, you need to enter the F200 mode.    

Entering the F200(Curve Output Setting) required password is “-+-+”.

IndexDesignationCommentsDefault
F200No. of Curves0: Not Used 1-9: Segment number0
Ft01Section 1 Run Time0-999 sec. Must be“F200”>0
FA01Section 1 Start current3.00-21.00mA
Fb01Section 1 End current3.00-21.00mA
Ft02Section 2 Run time0-999 sec
Fb09Section 9 End current3.00-21.00mA
Modes Settings
  • In this Each curve has 3 parameter,
  • Section 1 Run time (Ft01) is 0-999sec
  • Section 1 Start Current Time (FA01)  is 4-20mA
  • Section 1 End Current Time (Fb01)  is 4-20mA

Examples of Automatic Curve Output setting;

Generating Ramp wave

Ramp wave Generating
Generating Ramp wave

For generating the curve, we need to enter F200 Mode, by entering the password ”-+-+”.then and F200 is value should be greater than 0. follow the below steps.

  • Ft01 means run time for the curve. By varying the Ft01 value to set the running time of the curve.
  • FA01 means start current value of the curve(4-20ma).
  • FB01 means end current value of curve.
  • Similarly for all curves we need the following settings.

Generating Square wave

Generating Square Wave
Generating Square wave

Generating Sine wave

Sine Wave Generating
Generating Sine wave

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