30+ Years of Precision Instruments
Product Introduction: 1. Adopts high-precision A/D conversion chips, low-noise voltage references and new single-chip computer control software as the core technology. 2. Designed and manufactured according to the classic principle of the relationship between air humidity and evaporation. The wind speed and atmospheric pressure values can be set with the touch keypad on the instrument panel according to the site environment, and after internal computer processing, high-precision relative humidity, wet-bulb temperature and dry-bulb temperature values are directly given. 3. The actual accuracy of the instrument can be verified. 4. Two precisely matched Pt100 platinum resistors are supplied as measuring sensors, offering high accuracy and long service life. 5. A separate third-channel temperature measurement and control is attached, and timed operation can be performed. The instrument is suitable for fully automatic control of high-precision constant-temperature and constant-humidity chambers, and can also serve as a calibration reference for manufacturers of capacitive and polymer humidity sensors.
Main Technical Parameters: 1. Temperature measurement error: ≤±0.3% F.S + 1d; 2. Humidity measurement error: ≤±0.5% F.S + 1d (when wet-bulb temperature is between 20～90℃); ≤±1% F.S + 1d (when wet-bulb temperature is between 15～100℃); 3. Independent loop temperature measurement error: ≤±1% F.S ±1℃; 4. Humidity measurement range: 0～100.0%RH; 5. Temperature measurement range: -100.0～200.0℃; 6. Matched sensors: two matched Pt100 platinum resistors for dry/wet temperature measurement; a separate platinum resistor for the independent loop; 7. Running time setting range: 0～9999 min; 8. Atmospheric pressure setting range: 64～130kPa; 9. Wind speed coefficient setting range A: A=0: wind speed 0.4m/s; A=1: wind speed 0.8m/s; A=2: wind speed 2.5m/s; A=3: wind speed (vertical) 0.6m/s; 10. Dry/wet temperature bias correction range: -100.0～100.0; 11. Dry temperature and humidity control mode: fuzzy control; 12. Independent loop control mode: two-position; 13. Independent loop hysteresis setting range: 0.2～20.0℃; 14. Output drive solid-state relay signal: current approx. 15mA, no-load voltage not lower than 12V; 15. Output contact capacity: AC250V 3A (resistive load); 16. Instrument dimensions (H×W×D): 96×96×130 (mm)
