Overview
- Designed for EEG CMRR and system noise testing.
- Double shielding structure to avoid internal and external noise interference.
- Built-in calibrated sine wave generator and Vc voltage measuring circuit to assure output accuracy level.
- Touch panel allows user to select test standards and adjust test parameters in standalone usage. PC software mode is available when connecting CMRR 3.0E to PC via USB.
- CMRR Assistant software pack to simplify the standard into adjustable parameters and selectable options.
- Software Development Kit (SDK) allows user to develop customized or automated test software with less efforts.Designed for EEG CMRR and system noise testing.
- Double shielding structure to avoid internal and external noise interference.
- Built-in calibrated sine wave generator and Vc voltage measuring circuit to assure output accuracy level.
- Touch panel allows user to select test standards and adjust test parameters in standalone usage. PC software mode is available when connecting CMRR 3.0E to PC via USB.
- CMRR Assistant software pack to simplify the standard into adjustable parameters and selectable options.
- Software Development Kit (SDK) allows user to develop customized or automated test software with less efforts.
Specification
| Item | Option | Specifications |
| Supply voltage | 0.5 / 2.828 / 20 / 2 / (70.71) (Vrms) | ±1% |
| CM point voltage | 1.414 / 10/ 1/ (35.355) (Vrms) | ±1% ( 0.25Vrms ±2% ) |
| Frequency | 50 / 60 / 100 /120 (Hz) | ±1% |
| Electrode with Impedance | Change electrode via the touch screen of CMRR 3.0E | None/RA/LA/LL/V1/V2/V3/V4/V5/V6 /ALL |
| Electrode without Impedance | Change electrode via the touch screen of CMRR 3.0E | RA/LA/LL/V1/V2/V3/V4/V5/V6 |
| Imbalance impedance, R | 10kΩ | 10kΩ ±1% |
| Imbalance impedance, C | 47nF | 47nF ± 5% |
| DC offset | Internal battery powered, can be added on RA/ LA/LL/V1~V6 | 150mV ± 1% Up to 40hrs with intermittent use |
| 100 pF capacitor | Use 11:1 (110MΩ:10MΩ) voltage divider to measure indirectly | 100pF ± 5% |
| Environment | Intended for normal laboratory environment. The selection of critical components is known to be stable in the range shown. The 110MΩ divider may be affected by high humidity in excess of 85% | 15 – 30°C |
| 10 – 75% RH |