Is it possible to use scaling factors for currents? I'm reading in eight different current loops from a DT85, and I'm trying to figure out the best way to output my data in the proper units.

There's an example in the manual that suggests I can use scaling just as I would with voltage, but wouldn't that cause it to be read as an external shunt resistance?

Thanks.

Good morning mgreen2,

No. It is the channel type and channel options that controls the wiring not the scaling. Most of the current configurations are to do with reading 4 to 20 mA current loop device. Which one your use will depend on your task.

Using the internal shunt makes wiring much easier and reduces power consumption but the sensors may need a measurement delay to allow them to warm up and as the device is switched in and out of circuit you can't have other devices in the loop.

Using an external shunt allows the sensor to be continuously powered and other device can read the loop. There are also two different channel types:

• I will return the actual current reading between 4 and 20 mA
• L will return the percentage of loop Where 4 mA = 0% and 20 mA = 100%

You can the use a span to convert from the channel units to your engineering units.

Cheers,
Roger