Relative humidity probe adjustment example - INDIGO300

Indigo300 User Guide

Document code
M212849EN
Revision
C
ft:locale
en-US
Product
INDIGO300
Document type
User guide
  • 4-mm Allen key, provided
  • M12 - M8 service cable (Vaisala item code 262195)
  • Previously collected calibration readings, for example, a calibration certificate

This procedure tells you how to use the Indigo80 handheld indicator to adjust the humidity measurement of the probe connected to the transmitter when you have a list of previously collected calibration readings available (for example, in a calibration certificate from a 3rd party laboratory calibration). You can adjust the probe without having to generate the calibration conditions and wait for stabilization.

If you adjust the probe using previously measured values, the device readings will be corrected and your previous calibration certificate will not be valid anymore. If an up-to-date calibration certificate is still needed, you must perform the calibration again to detect any remaining measurement error after the adjustment.
  1. Connect the transmitter to the indicator.
  2. Open the indicator main menu by pressing .
  3. Select Devices. If you have more than one device connected to the indicator, make a further selection between the devices.

    In this case, select the probe connected to the transmitter. For example, if the transmitter is connected to port 2 of Indigo80, the connected probe is identified with icon 2A on the Indigo80 display.

  4. If the probe connected to the transmitter supports the sensor purge feature, wait for the start-up purge to finish or start the purge manually by selecting Devices > <your device> > Sensor purge.
  5. Select Calibrate / Adjust.
  6. Select the type of calibration or adjustment to perform, for example, RH adjustment.
  7. Select Manual adjustment.
  8. Select Reference value, point 1.
  9. Use the arrow buttons to set the reference value (for example, the reference humidity from your calibration certificate), and then select OK or Set.
  10. Scroll down and select the Measured value, point 1 field. Replace the automatically inserted value with your previously measured calibration reading (for example, the observed humidity value from your calibration certificate).
  11. Scroll down and select the Measured temperature, point 1 field. Select the correct unit, then replace the automatically inserted temperature value with your previously measured value (for example, the observed temperature value from your calibration certificate).

    Scroll down and repeat for Reference value, point 2, Measured value, point 2, and Measured temperature, point 2 (if performing a 2-point adjustment).

  12. To store the adjustments to the probe, scroll down and select Activate adjustment > OK. Confirm by selecting OK.
    To exit without taking the adjustment in use, press to end calibration.
  13. Update the calibration information in Calibrate / Adjust > Calibration information. Navigate to the Calibration information menu by pressing .
  14. Press to end calibration.