Specifications - HP 6236A Operating And Service Manual

tions in additiola to the standard 104-127Vac 47-63Hz
unit and is furnished with a permanently attached 5-foot
3-wire grounding-type line cord.
1-8 SPECIFICATIONS
1-9 Table 1-1 lists detailed specifications for the power
supply.
SECTION I
GENERAL INFORMATION
I
INTRODUCTION
1-1
1-2 This manual covers two triple output power supply
models, the 6236A and the 6237 A. Both models are com-
pact general purpose bench supplies that are particularly
useful for powering developmental IC circuits, both linear
and digital. Unless one model or the other is specifically
identified, all information in this manual applies to both
the 6236A and the 6237 A.
1-10 OPTIONS
- - - CAUTION - - -
Carefully read Sections II and III of this
manual before attempting to operate the
power supply.
1-11 Options are factory modifications of a standard
instrument that are requested by the customer. The follow-
ing options are available for the instrument covered by this
manual.
OPTION NO. OESCR IPTION
---CAUTION---
1-13 ACCESSORIES
The user can convert an instrument from one line voltage
option to another by following the instructions in Para-
graph 3-4.
1-12 Before the supply is shipped from the factory, an
internal line voltage selector switch is set and the proper
fuse installed for the line voltage specified on the order. A
label on the rear heat sink identifies this line voltage option.
Input Power: 87-106Vac,47-63Hz,
single-phase.
Input Power: 191-233Vac,47-63Hz,
single-phase.
Input Power: 208-250Vac, 47-63Hz,
single-phase.
220
240
100
Before applying power to the supply, make cer-
tain that its line voltage selector switch (S3) is
set for the line voltage to be used. (See CA UTION
notice in Paragraph 3-2 for additional information
on S3).
1-5 All controls, meters, and output terminals are loca-
ted on the front panel. Two single-turn potentiometers con-
trol the +6V (or +18V) and ±20V outputs. A three-position
meter switch selects one of the supplies for display of its
voltage and current on two dual-range meters. The +6V
(or +18V) and ±20V outputs share a common output ter-
minal which is isolated from chassis ground.
1-3 DESCRIPTION
1-4 Both models have a dual output of 0 to ±20 volts
at 0 to 0.5amps. The voltages of the two 20-volt outputs
are adjusted by a si ngle front-panel control and track one
another within 1%. The +20V and -20V outputs can also be
used in series for a single 0 to 40V 0.5A output. The third
output differs in the two models and is 0 to +6 volts at up
to 2.5amps in the 6236A and 0 to +18 volts at 0 to 1amp
in the 6237 A /
1-6 All outputs are protected against overload or short-
circuit damage. The +18V output in the 6237 A and the
±20V outputs in both models are protected by circuits
which limit output current to 110% of its nominal maximum.
The overload protection circuit for the +6V output in the
6236A has a current foldback characteristic which reduces
the output current as an overload increases until only 1A
flows through a short circuit. For this output, the current
limit depends on the output terminal voltage and varies
linearly between 2.75A at 6V and 1A at zero volts.
1-7 The instrument is available in three line voltage op-
1-14 The accessories listed below may be ordered from
your local Hewlett-Packard field sales office either
1-1