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3. Active feedback loop to stabilize voltage / current: this is automatically enabled; with active feedback control,
output is much more stable than the analog version (EX models), and typical ripple noise is less than 5mV and
5mA for most models.
4. Voltage and Current Calibration: this can be achieved by typing in “C” (for voltage) and “K” for current
calibration via the serial monitor of Arduino software. 5 calibration points are used for the full range of output.
5. Enable/Disable output: output can be disabled or enabled with a press of button. For all models but 2, this is
accomplished via output relay (see Table 2-1). For HY30005EP and HY3050EP, this is accomplished by enabling
and disabling the main switching IC inside the power supply.
Caution:
For
HY30005EP and HY3050EP, it
might be important to disconnect the output load physically to avoid back EMF and current into the power supply
when the power supply is disabled or turned off.
6. Remote sensing: Remote sensing (RS) can be turned on or off by the button in the back (#8 in the back, see Back
Panel layout). Before enabling the RS, the user
must connect the sensing wire to the “Remote In”
(#4 in the back panel). Notice that we assume that
the wiring is symmetric with respect to the load,
and the line resistance is represented by R1. The
sensing wire is connected to the load on the
positive side.