Performing one-point humidity and temperature adjustment - HMP155

HMP155 User Guide
Document code
M210912EN
Revision
G.1
Language
English
Product
HMP155
Document type
User guide
  1. Carry out chemical purge, if available.
  2. Uncover the adjustment buttons on the probe by removing the protective cover and the calibration seal.
  3. Open the protective plug.

    There are 3 buttons marked -, □, and +. There is also a 2-colored indicator LED. See Figure 1.

  4. Remove the filter and insert the probe into a measurement hole of the salt chamber to do the humidity adjustment.
  5. To change HMP155 to the adjustment mode, press the ADJ button and hold it down until the green indicator LED lights up.
    Do not touch the adjustment buttons before the conditions have stabilized.
  6. Press the ADJ button and hold it down until the green indicator LED lights up. This puts HMP155 in the adjustment mode.
    Do not touch the adjustment buttons before the conditions have stabilized.
  7. Using the - and + buttons, make sure the Aout voltage is correct and press the ADJ button.

    Green indicator LED turns off and back on.

  8. To move on to the temperature adjustment, press the ADJ button once and the red indicator LED lights up.
  9. Insert the probe into the reference temperature.
  10. Using the - and + buttons, make the temperature offset adjustment by making sure the Aout voltage is correct and press the ADJ button.

    Red indicator LED turns off and back on.

  11. Press the ADJ button one more time so that the red LED turns off to indicate the probe has quit the adjustment mode.
  12. After the procedure, tighten the protective cover properly.

    To avoid water leaking in, make sure that there is no gap.