AMETEK XG Family Programmable DC - Manual (Page 75)

Local Operation
M370430-01 Rev E 3-29
3
Using Under Voltage Protection (UVP)
Important: UVP will not be active for voltage set points that are less than 1%
of model voltage.
The UVP prevents voltage settings below a set value. The UVP lets you
create a voltage window of operation when used in conjunction with the
OVP setting. The UVP range is variable from 0 V to OVP
SET
-10%.
The UVP is a protection that becomes active after the output is enabled
and a period of time has passed to allow the output to reach its set point
value before the UVP protection begins monitoring. As with OVP if the
voltage set point is determined by analog control (VAP) and the voltage
strays to within 5% of the UVP set point then UVP Safe will trigger to
warn the user that they are about to trigger the UVP alarm.
The period of time before the UVP monitoring is active after the output
is enabled is determined by the rise-time delay for the model as listed in
Table C-2, “Remote Operation Programming” on page C-8 on the row
called Up-prog Response Time, 0 - Vmax. Since the rise time is based
on a purely resistive load the user should be aware that UVP triggering
might be possible in capacitive or rectifier loads due to the rise time
being longer. In these cases it is recommended that the user mask the
UVP alarm until the rise time has elapsed and then unmask the alarm to
allow UVP protection to be enabled during operation.
Defining the UVP Set Point
To define the UVP set point:
1. Turn the power supply On.
2. Set the output to the desired voltage.
3. Turn the 9-position mode control to the PRT position.
is displayed.
4. Turn the rotary Adjust/Enter control until is
displayed.
5. Press the rotary Adjust/Enter control to select the UVP for
setting up.
6. Set up the lower limit protection using the rotary Adjust/Enter
control.
Important: The UVP range is variable from 0 volts to OVP
SET
-10%.
7. Once the desired value has been set, press the rotary
Adjust/Enter control to commit the setting.
See “Coarse and Fine Adjustment Modes” on page 3-3.
The SCPI command (s) for these instructions are:
[[:]SOURce[<channel>]]:VOLTage:PROTection:UNDer[:LEVel]