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Fnirsi SG-003A & SG-004A Signal Generators

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Mike1233:

--- Quote from: arturmariojr on May 06, 2024, 12:57:54 pm ---Does anybody know what is the mode XMT of Fnirsi SG-004A?

Does it make this device to be a current controller, like Fluke 789 on simulation current source, when you must connect a power supply to its input and the load to output and it will controll the sinked current by load?

Best regards
Artur

--- End quote ---

I am new with the Fnirsi SG-004A but i have tried the option XMT.
I have a device for measuring the volume of a tank. It uses a pressure sensor from 4-20mA. It has 2 wires.
If i measure the output for the connectors measures 21,3V DC.
If i connect the SG-004A on the sensor input, with the setting XMT, and change the mA output it shows that the volume is changing.
If i use the "normal" output mA then nothing happens.

LastManStanding:
Hi there,
I'm experiencing some unusual behavior with my SG-004A. I'm unsure if my device is faulty. There is a consistent fluctuation in the output voltage, around 2mV. The voltage gradually decreases, then quickly rises again, resembling a sawtooth waveform. Can someone verify if they are experiencing similar behavior with their SG-004A?

Alberto Arias:

--- Quote from: arturmariojr on May 06, 2024, 12:57:54 pm ---Does anybody know what is the mode XMT of Fnirsi SG-004A?

Does it make this device to be a current controller, like Fluke 789 on simulation current source, when you must connect a power supply to its input and the load to output and it will controll the sinked current by load?

Best regards
Artur

--- End quote ---

Hello Artur,

When you use the SG-004A to generate mA, you have two options:
1.- You select OUT mA option. Your SG-004A powers the 4-20mA loop. You even have the option to use either 24V or 12V (the latter option uses less battery power)
2.- You select OUT XMT option. Your SG-004A doesn't power the 4-20mA loop. Either the equipment receiving the 4-20mA signal feeds the loop, or you need to use an external power supply.
Some other process calibrators that I've used in the past describe those two modes as active/pasive, or source/simulate.

Best regards,
Alberto

4thDoctorWhoFan:

--- Quote from: LastManStanding on May 12, 2024, 05:09:49 pm ---Hi there,
I'm experiencing some unusual behavior with my SG-004A. I'm unsure if my device is faulty. There is a consistent fluctuation in the output voltage, around 2mV. The voltage gradually decreases, then quickly rises again, resembling a sawtooth waveform. Can someone verify if they are experiencing similar behavior with their SG-004A?

--- End quote ---
Yes, I have lots of fluctuations with my 004 also.  I seem to have more than 2mv of fluctuation.  Because of this, I don't really use it anymore.  I should have returned it, but I didn't. A also have a LB01A which is rock solid.

DaneLaw:

--- Quote from: 4thDoctorWhoFan on June 19, 2024, 07:13:02 pm ---
--- Quote from: LastManStanding on May 12, 2024, 05:09:49 pm ---Hi there,
I'm experiencing some unusual behavior with my SG-004A. I'm unsure if my device is faulty. There is a consistent fluctuation in the output voltage, around 2mV. The voltage gradually decreases, then quickly rises again, resembling a sawtooth waveform. Can someone verify if they are experiencing similar behavior with their SG-004A?

--- End quote ---
Yes, I have lots of fluctuations with my 004 also.  I seem to have more than 2mv of fluctuation.  Because of this, I don't really use it anymore.  I should have returned it, but I didn't. A also have a LB01A which is rock solid.

--- End quote ---
Can you show an example with your unit?

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