HP 6038A Service Manual

3-100 Initial Conditions
3-101 The power supply initializes at power on pro¬
grammed with the values listed in Table 3-6.
Table 3-6. Initial Conditions
Voltage
0 Volts
Current
0 Amps
OUTPUT ADJUST
control
adjusts CURRENT
OVP Trip Voltage
determined by setting of OVP
ADJUST potentiometer
on front panel
Soft Voltage Limit
61.425 volts
Soft Current Limit
10.2375 amps
Delay
0.5 seconds
Foldback Protection off
Output
on
Unmask
none
Hold
off
Store/Recall
ail storage registers loaded
with initial conditions of unit
(output on/off is not stored)
3-103 The following paragraphs describe how to program
the power supply via the HP-IB. These instructions concern
device-dependent messages, such as setting output voltage.
Interface management messages, such as serial poll, have been
described previously under Paragraph 3-77, Interface Functions.
3-104 Table 3-7 lists each of the device-dependent com¬
mands, the range of each parameter sent to the power supply
or the response of the power supply to a query from the con¬
troller, and a brief description of each command. Also
included is the number of the paragraph in which each com¬
mand is described more fully. If no unit is specified where ap¬
propriate in data sent to the power supply, the power supply
selectsS.i. units {V,A,s). Paragraphs 3-105 through 3-122 pro¬
vide general rules that apply to all commands.
NOTE
Lower-case alpha characters sent to the power
supply are treated as upper-case alpha
characters.
3-1C® Mumbers Sent to Power Supply. Numbers can be
sent to the power supply either with implicit or explicit decimal
point notation, and with or without a scale factor (scientific
notation), allowing use with controllers having a wide variety
of output formats.
3-1(^ Numbers written in implicit point notation do not con¬
tain a decimal point; for example, 123 for one hundred twenty
three. Numbers written in explicit point notation contain a
decimal point, such as 1.23,
3-107 In scientific notation the letter "E" stands for "10
raised to". For example, 1.23E4 would be read as 1.23 times
10^, which equals 12,300.
3-108 Plus and minus signs are considered numeric
characters. Ail numeric data fields may contain an optional plus
or minus sign on both the number itself and the scale factor,
such as -f 1.23E-2.
3-109 All numeric data fields may contain leading spaces,
and embedded spaces will be accepted between optional signs
and digits, digits and E, decimal point and E, and E and op¬
tional sign. The following two examples contain one em¬
bedded space in each position In which they are allowed;
+ 1.23 E -F 4 -F 123. E -F 4
Embedded spaces will not be accepted between digits or be¬
tween digits and decimal point.
3-110 At least one digit must precede E. For example, 1E
-f 4 is correct, E +4 is incorrect. Lower case e is treated the
same as upper case E.
3-111 Numbers Returned To Controller. The format of
numbers returned to the controller depends upon the type of
data requested, and is given in Table 3-8.
3-112 Leading zeroes are sent as spaces, except that the
first digit to the left of a decimal point is never sent as a space.
3-113 All numeric data sent to the controller are preceded
by a header consisting of alpha characters that identify the
type of data, such as VOUT or tSET. The header consists of
upper case characters only, with no embedded spaces. No suf¬
fixes are attached to numeric data.
3-114 Separators For Data Sent To Power Supply.
Separators are used by the power supply to break up commands
into pieces, called tokens, which it can interpret. Separation
of commands into tokens is accomplished either explicitly by
the insertion of separator characters or implicitly by noting a
change from one class of input to another.
3-115 The explicit separators are commas and spaces. An
explicit separator is required between tokens consisting of alpha
characters. For example, SRQ ON is correct, SRQON is not
correct. Commas are used only to separate parameters in com¬
mands containing more than one parameter. UNMASK is the
only command for which more than one parameter may be sent.
Only one comma Is allowed, and it may be preceded or follow¬
ed by any number of spaces, For example, both these com¬
mands are correct;
UNMASK CC,OR,FOLD
UNMASK CC, OR, FOLD
but this command is incorrect:
UNMASK CC OR FOLD
Spaces are used in all other cases requiring explicit separators.
Any number of consecutive spaces is treated as one space.
3-14

HP 6038A Specifications

General

Brand	HP
Model	6038A
Category	Inverter
Language	English