Introduction.3; Controls And Indicators.3 - HP 6034A User Manual

Section III
PERATIfyO INSTRUCT
3-1 INTRODUCTION
3-2 This section describes the operating controls and in¬
dicators, turn-on checkout procedures, and operating pro¬
cedures and considerations for the Model 6034A. Local (front-
panel) and remote (via HP-IB) operation are described
separately, but the user should become familiar with both
methods of operation. Information in this section through
paragraph 3-64 and in paragraphs 3-70 through 3-73 applies to
both local and remote operation. Programming examples for
specific Hewlett Packard computers and desktop calculators
are given in 6034A Power Supply User's Guide, HP Part
Number 06034-90003. More theoretical descriptions regarding
the operational features of power supplies in general are given
in the DC Power Supply Handbook, Application Note 30B
(available at no charge from your local Hewlett-Packard Sales
Office),
pWARNlNG |
Before the instrument is turned on, all protective
earth terminals, extension cords, and devices
connected to the power supply should be con¬
nected to a protective earth ground. Any interrup¬
tion of the protective earth grounding will cause a
potential shock hazard that could result in per¬
sonal injury. Only fuses of the specified type with
the required current rating should be used. Do not
use short circuited fuseho/ders. To do so could
cause a shock hazard.
3-3 CONTROLS AND INDICATORS
3-4 The front-panel controls and indicators are shown in
Figure 3-1 and described in Table 3-1. Table 3 1 also lists the
paragraphs in which use of the controls and indicators is
described.
3-5 OUTPUT RASMGE FOR
3-6 The Model 6034A can operate as a constant voltage
(CV) or constant current (CC) source over a wide range of out¬
put voltage and current combinations. Whether the 6034A
operates as a CV or a CC source depends on the output
voltage and current settings and the value of load resistance.
3-7 Figure 3-2 shows the overall output range of the sup¬
ply, with three sample operating loci. Locus 1 is established
with a voltage setting of 20 V and a current setting of 3 A. For
any values of load resistance greater than the crossover value
of 6.7 ohms, the supply operates in constant voltage mode.
For values of load resistance less than the crossover value, the
supply operates in constant current mode. The transistion
occurs automatically; no switches need be operated or con¬
nections changed. The front-panel MODE indicators show
which mode is active. In local control, the 6034A powers on as
a voltage source, and either the CV (NORMAL) or CC (LIMIT)
indicator will be on. (The 6034A can be remotely programmed
to operate as a current source and then returned to local con¬
trol. As a current source, either the CC (NORMAL) or CV
(LIMIT) indicator will be on.) in remote control, the 6034A can
Figure 3-1. Front-Panel Controls and Indicators