With the advent of projection and direct-view large-sized liquid 
crystal monitors and televisions, the vertically aligned mode liquid crystal display has become prominent. These displays depend on negative dielectric liquid crystals. One of the most critical parameters for any LC is γ, the rotational viscosity, which greatly influences the time response of the display. However, measuring the rotational viscosity of negative dielectrics has traditionally been difficult. This is due to backflow and other such switching phenomena.
Instec designed the Negative Nematic Liquid Crystal γ (NNLCG1) test instrument specifically to overcome this problem. With it, one can quickly and accurately measure the rotational viscosity of negative dielectric materials in seconds.
Technical Specifications
| Output Wave | 1 KHz, voltage 0 to ±100V |
| Output Update Rate | 500KHz |
| Output Resolution | 16 bit |
| Input Resolution | 16 bit |
| Input Sample Rate | 500KHz |
| Current Measurement Range | 1nA ~ 1mA |
| Current Sensing Resistance | 10KΩ |
| Current Resolution | 100pA |
| Post Gain in the ALCT Box | 1, 10, 100, 1000 |
| Capacitance Measurement | 2pF to 100nF |
