Section III
Model
3455A
ment,
and are
only provided as additional information
for HP-IB system use. The following
is an
explanation
of the
various
times involved
in a
measurement
se-
quence.
troller), HPL
(-hp- Model 982SA Controller)
and
Enhanced
Basic (-hp- Model
983SA/B and 9843A/B
Controller) languages. The examples
in the Appendix
can be helpful
when
you
write
programs
for the 34SSA.
a.
ij (Typical
Input Data Transfer Time): This is the
typical time it takes to transfer input data (set the 34S5A
to
a
certain
function
and range, etc) from a controller to
the instrument.
The transfer time depends on the num-
ber
of ASCII character send to the instrument and the
response lime of the controller. For example, to send an
"FIT3” message to the instrument lakes four charac-
ters.
b. l2 (Typical Input Settling Time): The instrument
is triggered (HP-IB, External,
or
Hold/Manual Trigger)
and the 3455A
begins
to take a reading. This time con-
sists
of the settling lime of the input relays, FETs, and
other
circuits.
c.
t3 (Typical Measurement Time): The input mea-
surement is taken at this time. This includes the A-to-D
conversion time.
d. l4 (Typical Compulation Time): When
the
measuring and the A/D operations are completed,
the
instrument’s internal
main
controller circuits calculates
the correa measurement
reading. This time is the
amount of the time it takes to complete the calculation.
d. IS (Typeial Output Data Transfer Time): The
34SSA
now
sends the reading to the HP-IB output buf-
fers to be
transferred
to the controller. This time also
depends on the response time of the particular con-
troller.
3-18.
Renata Pragraomiag Exinplat.
3-89.
Appendix A at the end of this manual has Remote
Programming examples for the 34SSA. These examples
are
given
in the HP Basic (-hp- Model 9830A/B
Con-
3-80.
OPERATORS CHECKS.
3-91.
The TEST feature provides
a
convenient
method
of testing the basic operational capabilities
of the Model
34SSA. This test plus an operational
check of the Ohms
and AC functions tests the major
portion of the 34SSA
circuitry. Keep in mind the following
checks lest only
the operating capability
of the 34SSA. They
do
not
check the
performance accuracy.
3-92. BENCH USE.
3-93.
The
following
sequence may be used to manually
check operational capability
of the 34SSA.
a. Set the
3455A to
AUTO
RANGE.
b. Press the TEST button. The
display should be
blank while the 34S5A is
performing the self test.
Upon
successful completion of
the test, all front panel
in-
dicators (except the REAR
TERMINAL indicator) will
light and
a
reading of
+ 8888888 with all decim^ lit
will
be
displayed. The
self test
will
be repeated
until
another function
is selected.
c. Connect a short across the INPUT
terminals.
d. Press the 2 WIRE
kO button.
The
front panel
display should read .00000
±
300 milliohms.
e. Press the ACV button. The display
should read
.00000
±
600 microvolts.
3-84.HP-IB OpwitiM.
3-93.
Figure 3-3 shows
the steps necessary
to
perform
the
34SSA
operators
check from the Bus.
Tabla 3-6. Typical
HP-IB
Coatrollad
Maasaremant Tiract.
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