Electronic Stimulators

The stimulator family of Experimetria Ltd. looks back to an almost 20 years history. During these years the basic design changed three times and continuous further development of the system’s technical parts make these instruments the most handy and useful tools for pharmacological, physiological and neurophysiological studies.
CRS-ST is a microprocessor controlled modular square impulse stimulator.

The stimulator is made up of three major units:

1. the microprocessor controlling unit (MCU unit)
2. the analog end-amplifier unit
3. accumulator charger for accumulator isolated unit

The analogous end-amplifiers are available:

• with built-in opto-separator at the power of 100V/100 mA (type: PTS)
• with built-in isolator at the power of 100V/100 mA (type ISO)
• with built in accumulator isolation at the power of 50V/50 mA (type: AISO)

The number of end-amplifiers that may be connected to the MCU unit may range between one and eight modules of any type.

• intelligent error messages
• last programmed train is saved
• unique real current isolator end amplifier unit- absolutely ground free
• accumulator isolated end-amplifier unit, with built-in recharger
• stimulation is up to 100V or 100mA
• current and voltage generator is built together in the end-amplifiers
• analogue amplitude adjustment between stimulator ranges
• stand alone programming unit (MCU), which can drive max. eight end-amplifiers
• signal indicator LED, continuously showing processing train
• switches for easy polarity changes
• positive and negative squares in the same train

 

General parameters:

Power supply	230 V/ 50 Hz (+10/ -15%)
Main fuse	630 mA/ 250 V
Trigger input	TTL rise/ fall
Prog. input	USB, RS232 (COM. PORT)
Accessories	banana plugs (for stimulation pulse output) Canon (DSUB) extension cable power cable

MCU - Programming unit:

Synch output signals
Output signal level	0-+5 V (TTL levels)
Max. load ability	1 TTL input
Synch signals' length	25 micro sec
Active edge of square wave	Falling edge
Parameter ranges
Pulse Period (PP)	500 micro sec ... 999 sec
Delay (DE)	0.1 micro sec ... 999 sec
Pulse Width (PW)	10 micro sec ... 999 sec
Train Delay (TD)	10 micro sec ... 999 sec
Train Number (T)	1 ... 999

 

Non-isolated analogue end-amplifier:

Max. output	10 W
Impulse rise/fall	10 micro sec
Voltage output mode
Max. output voltage	±10 V; ±100 V
Current limit	±100 mA
Output protection	short circuit protected
Current output mode
Max. output current	±10 mA; ±100 mA
Voltage limit	±100 V
Output protection	short cicuit protected

Isolated analogue end-amplifier:

Max. output	10 W
Impulse rise/fall	10 micro sec
Voltage output mode
Max. output voltage	±10 V; ±100 V
Current limit	±100 mA
Output protection	short circuit protected
Current output mode
Max. output current	±10 mA; ±100 mA
Voltage limit	±100 V
Output protection	short cicuit protected

Battery powered analogue end-amplifier:

Max. output	5 W
Impulse rise/fall	10 micro sec
Voltage output mode
Max. output voltage	±5 V; ±50 V
Current limit	±50 mA
Output protection	short circuit protected
Current output mode
Max. output current	±5 mA; ±50 mA
Voltage limit	±50 V
Output protection	short cicuit protected

Programming possibilities

Mode 1.    Continuous series of impulses (continuous mode)         
Mode 2.    Continuous mode with delayed synchronous impulses
Mode 3.    Train mode
Mode 4.    Delayed train mode

PP    Pulse period: time period between the impulses
DE   Delay: delay of the stimulating signal synchronous signal
PW   Pulse width: width of the stimulating impulse
TD   Train delay: pause between trains




Mode 5.    Single mode
Mode 6.    Delayed single mode
Mode 7.    Single train mode
Mode 8.    Delayed single train mode

PP    Pulse period: time period between the impulses
DE   Delay: delay of the synchronous signal compared to the stimulating signal
PW   Pulse width: width of the stimulating impulse