Adjusting RH for H2O2 with Insight software - HPP272 - SWINSIGHT10

HPP272 User Guide

Document code
M211972EN
Revision
G
Language
English
Product
HPP272
Document type
User guide
  • Computer with Windows operating system and Vaisala Insight software installed
  • Vaisala USB cable (item code 242659) or Vaisala Indigo USB adapter (item code USB2) for connecting the probe
  • A humidity calibrator to create two different humidity levels, for example, Vaisala HMK15 Humidity Calibrator. Note that the humidity difference between the dry point and wet point must be at least 40 %RH.
CAUTION Do not expose the probe to H2O2 vapor when the probe is in calibration mode and sensor heating is off. Exposure to H2O2 condensation can cause the PEROXCAP sensor to fail within a day, and the sensor will not recover.

Because the stabilization of humidity takes time, you should expect the adjustment procedure to take at least 30 minutes for each adjustment point.

In order to make a successful adjustment, the humidity of the second calibration point (wet point) must be at least 40 %RH higher than the humidity of the first calibration point (dry point). For example, if point 1 is 10 %RH, the second calibration point must be at least 50 %RH.
  1. Prepare the RH calibrator equipment for RH calibration point 1 (dry point, recommendation 0 … 35 %RH).
  2. Connect the probe to Insight. See Connecting to Insight software.
  3. Wait for the start-up purge to finish.
  4. Select
    > Calibrate > Yes
    to switch the probe to calibration mode.

    In calibration mode, the device will not use functions that may interfere with calibration and adjustment.

  5. In the General tab, make sure the calibration mode RH and T is selected.
  6. Open the tab RH for H₂O₂ adjustment.
  7. Insert the probe head in the reference environment for calibration point 1.
  8. Wait for the RH and temperature measurements to stabilize fully. This may take more than 30 minutes. Monitor the readings to see when the measurement has stabilized.
  9. Click the Reference value, point 1 text box and enter the reference value of the calibration point. Press ENTER or click outside the text box when done.

    The probe automatically enters the measured value for the calibration point.

  10. Repeat steps 7 … 9 for calibration point 2 (wet point, recommendation 65 … 85 %RH).
  11. Check the measurement errors of RH, RS and H2O2 concentration.
  12. Select Activate adjustment > Yes to store the adjustment in the probe.
  13. Check the message that appears at the top of the screen. If the message indicates that the adjustment is activated successfully, your adjustment is stored in the probe.
  14. Select the Calibration information tab and update the Calibration date and Calibration text.
  15. Select Close > Yes to exit the calibration mode.