Milliamp Source - Ecom MA 400 Operating Instructions Manual

4.1 Milliamp Source

Figure 3 shows a typical application where the MA 400 is sourcing 4 to 0 mA into a device
under test.
1) Turn on the MA 400. It will default to the mA source mode.
) Connect the device to be calibrated.
Note: The loop must be closed for the MA 400 to source current. If an open loop occurs
"OL" will flash on the LCD indicating an overload or open condition.
3) The output can be adjusted to the desired value by using the knob interface and selecting
the decade to be adjusted.
4) The output can also be stepped in 4 mA steps (5%) using the key.
5) The auto step feature provides automated output changes. Refer to the Auto Modes
Section (5.1) of the manual for more information.
Figure 3 - Sourcing 4 to 20 mA
1