Datasheet

GMC-I Messtechnik 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 a
s 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 SEQUENC
E function (arbitrary
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 (Arbitrary Function)
The SEQUENCE function (arbitrary function) allows for the auto-
matic recall of settings which have been stored to the
SE
QUENCE memory.
The SEQUENCE function (arbitrary fun
ction) includes the follow-
ing 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 accor
dance with DIN 40 839 
(automotive electrical system voltage while
starting the engine)
U [V]
12
6
4,5
5
t [ms]
15 5 2000 10
Comment:
Adherence to the voltage rise and dr
op 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 dir
ectly defined, or can be set in
accordance with the following instrument conditions:
– Output ON / OFF
– Voltage / current regulation
– Running / completed SEQUENCE function (arbitrary 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
IEC 61 010-1/EN 61 010-1/ 
VDE 0411-1
Safety requirements for electrical equipment for 
measurement, control and laboratory use
EN 60 529
VDE 0470 Part 1
Test instruments and test methods
Degrees of protection provided
by enclosures (IP code)
DIN EN 61 326
VDE 0843 Part 20
Electrical equipment for measurement, control and 
laboratory use – EMC requirements