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CHAPTER 4:
Operation
Model 648 Electromagnet Power Supply
bring the magnet temperature to equilibrium. The Off menu selection can be
used to turn it off.
D
Disabled mode:
the Model 648 assumes that no valve is installed and the line for
magnet water status will not be displayed.
The magnet water flow switch is monitored whenever the water valve is energized. It is
also monitored continuously when in Disabled mode to allow the use of a flow switch
even when no water valve is used. If no flow switch or water valve is present, then a
jumper must be installed across the flow switch contacts for proper operation.
Menu Navigation:
Magnet Water
Q
(
Auto, On, Off, Disabled
)
Default: Disabled
Interface Command:
MAGWTR
4.14 Internal
Water
The Model 648 provides power to control an external water solenoid control valve to
control the cooling water for the power supply. The setup of the valve control is avail-
able in the internal water menu. The four menu selections are Auto, On, Off, and Dis-
abled. Disabled is the default setting.
D
Auto mode:
the water valve will be energized when the power in the internal
power devices exceeds 200 W. When the power drops below 200 W, the valve will
remain energized for an additional minute to remove any residual heat build-up.
D
On mode:
the valve will be energized whenever the power supply is on. This fea-
ture can also be used when the Model 648 is first installed to purge air from the
lines. The Off menu selection can be used to turn it off.
D
Disabled mode:
the Model 648 assumes that no valve is installed and the line for
internal water status will not be displayed.
The internal water flow switch is monitored whenever the water valve is energized. It is
also monitored continuously when in Disabled mode to allow the use of a flow switch
even when no water valve is used. If no flow switch or water valve is present, then a
jumper must be installed across the flow switch contacts for proper operation.
Menu Navigation:
Magnet Water
Q
(
Auto, On, Off, Disabled
)
Default: Disabled
Interface Command:
INTWTR
4.15 Error Status
Display
Error messages appear in the center of the instrument display when a problem is
identified during operation. The fault LED will also light to indicate error conditions,
blinking for operational errors, and on continuously for instrument hardware errors.
Refer to section 6.9 for a listing of all the error conditions. When an error condition
occurs, the name of the error is shown in the display alternately with the message,
“Press Status Key for More Info”. Press
Status
to bring up a screen that will show an
extended description of the error.
To enter the error status display press
Status
while in the main display. A new screen
appears. The screen will differ depending on the error that is being displayed. If there
are no errors to report, the display message will read “No errors reported.”
Menu Navigation:
Status
Q
Screen differs
Interface Command:
ERSTE
