VI-700 V&l Source
1
The IET Model
VI-700
(Figure 1.1) is a versatile
precision dialable or remotely programmable voltage
and current source. Its three ranges provide up to 20
V full scale (200 V with the HV option), and down to
100
µ
V resolution; and 20 mA full scale down to 0.1
mA resolution. Both voltage and current outputs are
available simultaneously. The output is set by a range
selector and thumbwheel switches in the
LOCAL
mode, or by a digital input at the rear panel. The
REMOTE
mode control can be a BCD parallel or
IEEE-488 interface.
The optional
HV
output extends the range of the out-
put voltage to 200 V at 10 mA.
It provides an output
at the rear panel 10 times higher-than that at the front
panel. The optional
HI
feature extends the output
current to 200 mA.
The optional,
HP
output extends the output load cur-
rent capacity to 200 mA for all the voltage ranges.
This makes the VI-700 suitable for many precision
low to moderate power applications.
Chapter 1
INTRODUCTION
INTRODUCTION
Figure 1.1: VI-700 Manual or Programmable Voltage
and Current Source
The VI-700 offers many full performance features.
It fulfills a variety of laboratory needs. Its wide out-
put range (up to 200 V), very low output impedance
(5 m
Ω
, typical), low noise and ripple, and 200 mA
load current capability suit the VI-700 to a variety of
applications, such as simulation, calibration, A/D and
D/A converter evaluations, and product development.
Front panel overload indicator lamps warn of exceed-
ing of voltage load or current compliance limits. This
feature assures the user that the output is within speci-
fications without having to make any measurement
or computations. The standard model may still be
used within the overload condition and will function
for approximately 50-100% overload with only a slight
degradation of specifications.
