American Magnetics 4Q06250PS-430 Integrated Power Supply System - Manual (Page 42)

24 Rev. 5
Operation
Default Display : Voltage
3.2.2 Voltage Display
The voltage display indicates either the voltage across the magnet (Vm) or
the power supply output voltage (Vs). This is always displayed in the lower
left corner of the display (see Figure 3-1), regardless of what else is being
displayed on the Model 430 Programmer display. The parameter displayed
(magnet voltage or power supply voltage) is toggled by pressing SHIFT
followed by Vs <> Vm . Vm indicates the voltage measured across the
terminals of the connected superconducting magnet. In order for the Model
430 Programmer to measure the magnet voltage, the magnet voltage taps
must be connected to the Model 430. Normally this is done through the
Magnet Station Cable provided by AMI (if the whole magnet system is
provided by AMI). Vs indicates the Model 430 Programmer-controlled
power supply output voltage.
Note
Note that the displayed power supply voltage (Vs) is not directly
measured, but rather is calculated based on power supply control
voltage being provided by the Model 430 Programmer and the power
supply input control voltage and output voltage values entered in
the setup menu.
3.2.3 Status Indicator
The status indicator indicates the
Model 430 Programmer operating
status. It is always visible (except
during a quench condition) and is
displayed just to the right of the
field / current display (see Figure
3-1). The status indicator may be
one of six symbols indicating one
of the seven states shown in Table
3-1.
If the ramping mode character is
blank, then a quench condition
exists and the red MAGNET
QUENCH indicator in the status
section of the front panel will be
illuminated. See section 3.12 on page 74 for a detailed discussion of the
meaning of the ramping modes (Paused, Ramping Up, Ramping Down and
Holding).
Table 3-1. Description of
Status Indicators
P
Paused
Ramping Up
Ramping Down
– Holding
Heating Persistent Switch
Cooling Persistent Switch
V
Voltage Limit