How is ChromWave calibrated?
• A: Not with a screwdriver (by design!). We do not use any potentiometers that may drift with time. We use a process of software calibration. The ChromWave hardware is placed inside a Faraday cage to minimize electromagnetic interference. The temperature and humidity are monitored using a NIST traceable thermometer and digital hygrometer. Each of the ChromWave waveforms at each of the voltage ranges is output to a NIST traceable digital voltmeter. The digitized voltage readings are then transferred via a HP-IB connection to the host computer. This data is properly formatted into a calibration file. Thus, each ChromWave device will have a unique calibration file.
