Programmable humidity generator 2900

with touch screen

The Model 2900 Humidity Generation System is a self-contained system capable of producing atmospheres of known humidity using the fundamental “two-pressure” principle. This system is capable of continuously supplying relative humidity, dew point, frost point, parts per million, or other calculated values for instrument calibration and evaluation as well as for precision environmental testing. This system will automatically generate manually entered humidity and temperature set points as well as user created multipoint profiles. All desired humidity’s, temperatures, flow rates, and time intervals may be programmed. FEATURES •Traceable to SI 1 •0.5% of Reading RH Uncertainty 7 •High Flow Capability of 50 L/min •Based on NIST Proven "Two-Pressure" Principle •HumiCalc® with Uncertainty Mathematical Engine •ControLog® Embedded Automation Software •Generate: RH, DP, FP, PPM, Multipoint Profiles •Externally Driven Chamber Fan •Multi-point Touch LCD •Fluid Jacketed Chamber Door •Window Chamber Door (Option) PRINCIPLE OF OPERATION The “two-pressure” humidity generation process involves saturating air or nitrogen with water vapor at a known temperature and pressure. The saturated high-pressure air flows from the saturator, through a pressure reducing valve, where the air is isothermally reduced to test pressure at test temperature. Humidity generation is dependent on the measurement of temperature and pressure, not on the amount of water vapor measured in the air. System uncertainty is determined by the temperature and pressure uncertainties, and on the stability and uniformity of the measurements.