Troubleshooting
- Primary Test: Plug the sensor into an interface and run the data-collection program. Check the readings on the default screen. Move the sensor to two places (one can be a container with a small amount of calcium chloride for low humidity; the other can be a container with a small amount of warm water for higher humidity). Confirm that the relative humidity readings change in a logical manner.
Additional Troubleshooting
- Does Vernier sell a weather station?
- How do I calibrate the Relative Humidity Sensor?
- My Relative Humidity Sensor thinks it is a UV sensor. OR I can't find my UV sensors but I seem to have some extra Relative Humidity sensors.
Specifications
- Sensing Element: IH-3602-L Integrated Circuit Humidity Sensor
(Specifications at 25 ºC and 5 VDC) - Range: 0% to 95%
- Power: 200 µA @ 5 VDC
- Response Time (time for a 90% change in reading):
⚬ In still air: 60 minutes (typical)
⚬ With vigorous air movement: 40 seconds (typical) - Typical Resolution: 0.04% RH
- Total Accuracy
⚬ with saturated salt calibration: ±2% RH
⚬ with standard calibration: ±10% RH - Operating Temperature Range: 0 to 85°C
- Temperature Effect
⚬ 0% RH voltage: ±0.007% RH/°C (negligible)
⚬ 50% RH voltage: –0.11% RH/°C
⚬ 95% RH voltage: –0.22% RH/°C - Default calibration coefficients: Slope 30.43%/V, Intercept –25.81%
Calibration
Calibrate? No. The sensor is set to match the stored calibration before shipping. However, you may want to calibrate the sensor for greater accuracy. There are two methods for calibration.
- Option One: conduct a one-point calibration using the reading from another instrument that measures relative humidity.
- Option Two: conduct a two-point calibration. To do this, you must prepare two containers with moistened salts. This process is time-consuming. Refer to the sensor booklet for a detailed set of instructions and a table of salts with relative humidities for five different temperatures.
Related Products
- Go Direct® Weather System (GDX-WTHR)