Tektronix 2304 Users Guide
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MODEL 2304
QuickS tart
USER’S GUIDE
230
HIGHSPEED
RECISION
READBACK
POWER SUPPLY
Safety Precautions
product and any associated instrumentation. Although some instruments and
accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions may be present.
shock hazards and are familiar with the safety precautions required to avoid possible injury. Read the operating information carefully before using the product.
may be present on cable connector jacks or test fixtures. The American National
Standards Institute (ANSI) states that a shock hazard exists when voltage levels
greater than 30V RMS, 42.4V peak, or 60VDC are present. A good safety practice is to
expect that hazardous voltage is present in any unknown circuit before measuring.
Standard IEC 664, digital multimeter measuring circuits (e.g., Keithley Models 175A,
199, 2000, 2001, 2002, and 2010) measuring circuits are Installation Category II. All
other instruments’ signal terminals are Installation Category I and must not be connected to mains.
properly grounded power receptacle. Inspect the connecting cables, test leads, and
jumpers for possible wear, cracks, or breaks before each use.
instruments while power is applied to the circuit under test. ALWAYS remove power
from the entire test system and discharge any capacitors before: connecting or disconnecting cables or jumpers, installing or removing switching cards, or making
internal changes, such as installing or removing jumpers.
side of the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.
the operating instructions located in the manual.
1000 volts or more, including the combined effect of normal and common mode
voltages. Use standard safety precautions to avoid personal contact with these
voltages.
personal injury or death. Always read the associated information very carefully
before performing the indicated procedure.
the instrument. Such damage may invalidate the warranty.
test cables.
The following safety precautions should be observed before using this
This product is intended for use by qualified personnel who recognize
Exercise extreme caution when a shock hazard is present. Lethal voltage
As described in the International Electrotechnical Commission (IEC)
Before operating an instrument, make sure the line cord is connected to a
For maximum safety, do not touch the product, test cables, or any other
Do not touch any object that could provide a current path to the common
The symbol on an instrument indicates that the user should refer to
The symbol on an instrument shows that it can source or measure
The WARNING heading in a manual explains dangers that might result in
The CAUTION heading in a manual explains hazards that could damage
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all
HIGH SPEED PRECISION READBACK POWER SUPPLY
This guide is designed to familiarize users of the Keithley Model 2304 High
Speed Power Supply with the basic operating features available from the instrument’s front panel and via the GPIB Bus. The sequence of instructions reflects the
order in which the instrument would be configured for a typical application. As
users become more familiar with the Model 2304, it may not be necessary to follow
this sequence so strictly. For each Model 2304 operating mode, an example set of
bus commands is provided. For a reading to be performed and returned via the bus,
the :read? command must be sent after the instrument is configured to the desired
mode. While the SCPI command strings are generic, the exact programming syntax
will depend on the programming language used in the test environment.
2304 HIGH SPEED POWER SUPPLY
POWER
Figure 1. Model 2304 front panel
The Model 2304 has three operating (display) modes:
> ACTUAL V AND I — This mode reads back the actual output voltage
and current. The instrument defaults to this mode at power up.
> DVM INPUT — This mode displays the DC voltage applied to the
power supply’s DVM input.
> PULSE CURRENT — This mode is used to display high, low, or average
pulse-current measurements or to return up to 5000 measurements
from the measurement buffer, i.e., for digitizing a current waveform.
Setting the output voltage and current limit:
DISPLAY
LOCAL
MENU
ENTER
OPERATE
SET
1
Output voltage can be set from 0 to 20V. There are two ranges for current
output — 5A and 5mA. The current range can be checked or changed using the
CURRENT RANGE selection of the MENU.
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MODEL 2304
1. Press the SET key to select the Output Settings Mode. A blinking cursor
will appear in the voltage field of the display.
2. Use the , , , buttons to key in the desired output voltage
value, then press SET. The blinking cursor will move to the current field
of the display.
3. Use the , , , buttons to key in the desired current limit, then
press SET to exit the Output Settings Mode. The display will return to
the actual V and I display mode.
GPIB commands for setting the output voltage and current limit:
:source:voltage xx.xxx ; set output voltage,
xx.xxx is between 0 and 20
:source:current:limit x.xxxx ; set output current limit,
x.xxxx is between 0 and 5
and
:sense:current:range minimum ; set to 5 mA range
or
:sense:current:range maximum ; set to 5 A range
Turning supply output on/off
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The output of the Model 2304 is turned on and off using the front panel
OPERATE button. The word “ON” appears on the display when the output is turned
on. When the output is turned off, “OFF” is displayed.
GPIB commands for turning the supply output on/off:
:output on ; turn the supply output on
:output off ; turn the supply output off
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