The model SI-90V Stimulus Isolator has been optimized for applications requiring precise control of rectangular waveform stimuli. It is designed for use with external timing circuits, such as monophasic single channel (e. g. Microprobes for Life Science BPG-1P) or other monophasic pulse signal sources such as computers). The external timing input gates the optically isolated, independently battery powered, constant current source.
The model SI-90V features high compliance, high isolation, and a conveniently portable plastic case. The output circuitry has been optimized for gated on-off operation rather than proportional input following. This mode of operation is inherently very low noise and eliminates the danger of applying DC currents as a result of low level offsets in the control signal between output pulses. It also permits manual fine tuning of the output level from the unit itself which can be placed near the preparation. If you need non-rectangular waveforms (e. g. sinusoids, ramps or computer D/A driving), we recommend the BSI-1A, a linear biphasic stimulus isolator with a complete range of both constant current and constant voltage output levels.
Specifications
| Item | Description |
| Constant Current | 1uA to 10 mA |
| Current Range Control | Off, 1, 10, 100 and 1000 uA per turn via 5 position rotary switch |
| Fine Current Control | 10 turn potentiometer with indicating dial |
| Output Linearity | 1% all ranges |
| Compliance Voltage | Selectable 45 or 90 Volts |
| Isolation | 1,500 VDC (optically isolated) 0.3 pF |
| Output Connections | 2 banana binding posts |
| Input Connections | Floating BNC Jacks |
| Input Signal | Schmitt Trigger 2.6V hi 1.8V lo Protected to +/- 10 Volts |
| Power Supply | 2: 9 Volt lithium batteries ULTRALIFE # U9VL. 2: 45 Volt alkaline batteries type NEDA 213 |
| Battery Life 9 Volt | 300 hours minimum (BattB) 1.9mA 4,000 hours (BattA) 155uA |
| Battery Life 90 Volt | See Appendix-B |
| Package | Bench mount with supporting handle, 2.6"H x 6.5"W x 7.5"D (less handle) |
| Weight | <2.5Ib. (shipped with batteries installed) |
Downloads
SI-90V Stimulus Isolator
Warranty
All Microprobes for Life Science' products are warranted against defects in materials and workmanship for one full year from the date of delivery. Products that prove to be defective during the warranty period will be repaired or replaced without charge pro-vided they are returned to the factory. No other warranty is expressed or implied. We are not liable for consequential damages.