User manual

GMC-I Messtechnik GmbH 5
1 Technical Description
1.1 Features and Range of Applications
Depending upon where they are used and prevailing local
conditions, electrical and electronic devices may be subject to
significant supply power fluctuation in the absence of stabilizing
and back-up systems.
Automotive electrical system voltage characteristics during starter
motor operation offer a typical example.
R&D, production and test departments must be able to assure
that electrical equipment is capable of executing all required
functions under these types of conditions.
Type SSP 120, SSP 240 and SSP 320 KONSTANTER power
supplies from GMC-I Messtechnik GmbH support users in fulfilling
this objective.
In particular in automated test systems for routine testing,
SSP KONSTANTERs are capable of high throughput rates. Short
response times assure accurate emulation of rapidly changing
voltage and current characteristics.
Power consumer characteristics relative to dynamic supply power
can thus be tested and simulated very easily.
The integrated calibration procedure and the included calibration
certificate are especially important for use in production and testing
departments which are certified in accordance with ISO 9000.
SSP KONSTANTERs (single output system power supplies are
programmable, voltage and current regulated DC power supplies
with 120, 240 or 320 W of output power.
They are microprocessor controlled, and are furnished with an
addressable RS 232C serial interface as standard equipment. Up
to 30 KONSTANTERs can thus be controlled from a single PC
port.
An IEEE 488 interface can be integrated as an option. Complete
control of all device functions, as well as querying of measured
values, setting parameters and device statuses is possible via
both interfaces.
Manual adjustment of voltage and current is accomplished by
means of two rotary pulse encoders with selectable adjusting
sensitivity.
Two 4-place multifunction displays are used for precision read-out
of measured values (V, A and W), as well as for menu-driven
configuration of numerous additional functions such as limiting
setting ranges, overvoltage protection, overcurrent shutdown
delay and programmable, digital signal inputs and outputs.
Up to 243 settings can be saved to memory and recalled either
individually or sequentially, for example in order to generate
specific voltage or current characteristics. And innovative circuit
technology allows for nearly load independent response times of
less than 1 ms.
Output parameters can thus be superimposed with AC signal
right up into the kHz range via the analog interface which is
furnished as standard equipment.
The measuring function includes a Min-Max value memory, limit
monitoring signals and a HOLD function.
1.2 Functions
Adjustable functions:
❑ Voltage and current setpoint values
❑ Voltage and current limit values (soft-limits)
❑ Activate / deactivate the output
❑ Overvoltage protection trigger value
❑ Overcurrent response (limiting with or without shutdown)
❑ Delay time for overcurrent shutdown
❑ Start-up performance (power-on status)
❑ Reset device settings
❑ Save / recall device settings
❑ Save / recall setting sequences
❑ Sequence definition
❑ Trigger input function selection
❑ Function selection for digital control inputs
❑ Operating parameters for the measuring function (Min-Max
value memory, limit monitoring, display resolution)
❑ Initialize calibration procedure
❑ Initialize self-test
❑ Operating parameters for computer interfaces (device
address, SRQ masks, transmission speed etc.)
Display functions:
❑ Momentary measured voltage, current and power values
❑ Minimum and maximum measured voltage and current
values
❑ Current device settings (individual or complete)
❑ Current operating status (control mode, overtemperature,
busy)
❑ Occurred events (mains or phase failure, overtemperature,
overvoltage, overload, programming error)
❑ Memory contents
❑ Device ID
❑ Calibration date
Protective Functions and Additional Functions
❑ Sensing terminals protected against polarity reversal and
automatic switching to auto-sensing
❑ Control panel disabling
❑ Output overvoltage protection
❑ Output protected against reverse polarity
❑ Overtemperature protection
❑ Backup battery for device settings memory
❑ Master-slave series operation
❑ Inrush current limiting
❑ Temperature controlled fans (with 240 and 320 W models)