American Magnetics 4Q1010PS-430 Integrated Power Supply System - Manual (Page 94)

76 Rev. 5
Operation
Ramping Functions : Manual Ramping
Limit and ramp rate(s) are applicable to both manual and automatic
ramping.
3.12.2 Manual Ramping
The INCR. FIELD and DECR. FIELD SHIFT-key functions control manual
ramping. Manual ramping ramps field/current up or down at the defined
ramp rate(s). See section 3.7.4 on page 37 and section 3.7.6 on page 38 for
details regarding the use of these SHIFT-key functions.
3.12.3 Automatic Ramping
Automatic ramping differs from manual ramping in that the Model 430
Programmer automatically performs ramping in the appropriate direction
to achieve the value of the target field/current setting. To use automatic
ramping, enter the target field/current with which ramping is desired
1
. If
ramping is not PAUSED, ramping to the target field/current begins
immediately. If ramping is PAUSED, ramping to the target field/current
will begin when the RAMP / PAUSE key is pressed to take the Model 430
1. Refer to section 3.7.1 on page 33 and section 3.7.2 on page 36.
Table 3-6. Ramp modes and descriptions.
Mode Description
Ramping Automatic ramping to the target field/current
a
is in progress.
Holding
The target field/current has been achieved and is being
maintained.
Paused
Ramping is suspended at the field/current achieved at the time
the PAUSED mode was entered.
Manual
Ramping is being controlled by the manual control (
INCR.
FIELD
and
DECR. FIELD
) SHIFT-key functions available on
the front panel.
Zeroing
Current
RAMP TO ZERO
is active, and the Model 430 Programmer is
ramping current to 0 A.
Zero Current
RAMP TO ZERO
is still active, and the current is less than
0.1% of
I
max .
Heating
Switch
The persistent switch heater has been activated. Ramping is
disabled during the persistent switch heating period.
Cooling
Switch
The persistent switch heater has been deactivated. Ramping is
disabled during the persistent switch cooling period.
a. The target field/current setting is discussed in section 3.6.2.
1. Refer to section 3.6.2 on page 31.