Datasheet

GOSSEN METRAWATT GMBH 3
SSP-KONSTANTER, Series SSP 120 / 240 / 320
Laboratory Power Supplies
Storage of Extreme Measurement Values
The MINMAX function automatically acquires minimum and
maximum voltage and current values as they occur, and saves
them to memory.
Limit Value Monitoring
This function compares momentary voltage and/or current values
with the adjustable limit values (HI, LO). If any of the limit values
are violated, a message is read out to the PC interfaces or the
digital control outputs at the analog interface.
Memory Function
The memory function allows for the storage and recall of
instrument settings which are protected with a backup battery.
The memory includes three storage areas:
– 10 memory locations for complete instrument settings
– 243 memory locations for the SEQUENCE function
(voltage setpoint value USET, current setpoint value ISET,
dwell time TSET, signal status SSET)
– 2 memory locations (HI, LO) for measuring function limit
monitoring
SEQUENCE Function
The SEQUENCE function allows for the automatic recall of
settings which have been stored to the SEQUENCE memory.
The SEQUENCE function includes the following parameters:
– START = memory location start address
– STOP = memory location stop address
– REPETITION = number of sequence repetitions
(1 to 255, or 0 for continuous repetition)
– TSET = dwell time specific to the memory location
(10 ms to 99.99 s)
– TDEF = dwell time independent of the memory
location (10 ms to 99.99 s)
– Additional pause, abort, restart
Application Example:
Generation of a voltage sequence in accordance with DIN 40 839
(automotive electrical system voltage while starting the engine)
Comment:
Adherence to the voltage rise and drop times is only guaranteed
in a restricted load resistance range.
Programmable Control Outputs
The analog interface is equipped with two digital control outputs
for reading out status messages to external monitoring systems,
for switching external components on and off or for the creation
of links.
The status of the outputs can be directly defined, or can be set in
accordance with the following instrument conditions:
– Output ON / OFF
– Voltage / current regulation
– Running / completed SEQUENCE function
– SSET signal status specific to the SEQUENCE step
– Measuring function limit monitoring
Calibration Procedure
The integrated calibration procedure allows for re-adjustment of
setting tolerances and measuring accuracy without opening the
instrument. Output parameters including voltage and current
offset and upper range value, which are automatically adjusted
one after the other and measured with an external precision multi-
meter, can be entered with the keypad or via the PC interface.
The processor permanently stores these data for the correction of
internal D-A and A-D converters.
Applicable Regulations and Standards
U [V]
12
6
4,5
5
t [ms]
15 5 2000 10
IEC 61010-1/EN 61010-1/
VDE 0411-1
Safety requirements for electrical equipment for
measurement, control and laboratory use
EN 60529
VDE 0470 Part 1
Test instruments and test methods
Degrees of protection provided by enclosures (IP code)
DIN EN 61326
VDE 0843 Part 20
Electrical equipment for measurement, control and
laboratory use – EMC requirements