Programming The Output; Establishing Initial Conditions - HP 654 A Series Operating Manual

PROGRAMMING THE OUTPUT
Introduction
Important
These instructions show how to program a single power supply. There are
special considerations when you have two or more supplies connected in series
or in auto-parallel. See "Chapter 4 - User Connections and Considerations".
The power supply accepts values directly in volts and amperes. Values will be rounded off
to the nearest multiple of the output resolution (see "Average Resolution" in "Supplemental
Characteristics" of Chapter 1). If you attempt to enter a value not in a valid range, the entry
will be ignored and OUT OF RANGE appears on the display.
Figure 5-2 shows the general response of a typical power supply. Note that the Series 654xA
and 655xA supplies have a small negative current area. This is for downprogramming
purposes. Always keep the output current within the positive area and within the boundaries
of the particular operating line for the specified mode of operation (CV or CC).
Establishing Initial Conditions
Set the power supply to the following conditions by pressing the specified keys as required:
Zero voltage output
Minimal current output
Dis annuciator off
OCP annunciator off
Prot annunciator off
[Voltage Enter)
LCurrentXJCsjtEnter]
(Output On/Off]
(If needed)
[ocpI (If needed)
(Shift
I
Protect]
(If needed)
Vs = - Voltage Setting
Vs = = Voltage Setting
Is :
= Current Setting
Is
= = Current Setting
Rc = = Crossover Resistance
Rc^ = Crossover Resistance
D - Vs
Rc= -T-
is
Voul
Rc=^
1 s
Figure 5-2. Typical Power Supply Operating Curve
5-4 Front Panel Operation
Programming the Output