Application Notes

EAP-032106

Converting Tank Level into Consumed Volume

We plan to measure a heavy oil amount of consumption of an oil tank.

A level meter installed in the tank is providing 4-20 mAdc in proportion to 0-100% of oil level. We like to see the oil consumption as positive value on the panel meter; therefore inverted output of 20-4 mAdc is required for the transmitter to provide.

Moreover, we like to add limit function on the transmitter’s 0% and 100% output. Does M-System have suitable transmitter for this kind application?

We like to introduce our PC programmable type Linearizer unit, model M2XF.

The M2XF is the transmitter that you can set specific corresponding value of each input and output in advance for max. 100-point. In your case, inverted output signal against input increasing signal is required and you also need to add output signal limit function.

Table to the right is a configured data example for setting. If you set input/output values like this data example then you can get input-output characteristics data as showing on the graph.

You can set each data with PC Configurator software, model JXCON.

We also recommend the following models for this application:

• Model M3LU Universal Transmitter, one-step cal and PC programmable, 128-point linearization
• Model M3LV Signal Transmitter, one-step cal and PC programmable, 101-point linearization
• Model M3LDY Current Loop Supply (4-20 mA input with 24 Vdc supply to the level transmitter), one-step cal and PC programmable, 101-point linearization