Vaisala HUMICAP HMT100 User Manual

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Vaisala HUMICAP HMT100 User Manual Manual pdf 32 page image

User's Guide ______________________________________________________________________32 __________________________________________________________________ M210701EN-DTwo-Point Adjustment Using a CalibratorNote that the difference between the two reference humidities must be atleast 50 %. MI70 indicator is used now only as a terminal for visualizingand setting the transmitter's RH reading.Follow steps 1 to 7 on page 30 and continue as follows:8. Remove the filter from the transmitter's probe and insert theprobe head into the lower humidity reference condition.9. Press ADJUST to continue adjusting.10. Choose 2-point adjustment from the MI70 adjustment menu andpress SELECT.11. Press READY when the reading has stabilized in the first referencecondition (may take 30 minutes or more). You can follow thestabilization from the GRAPH display.12. Enter the correct reference value in the first condition with thearrow buttons. Press OK.13. Remove the probe from the first reference condition and insertthe probe head into the higher humidity reference condition.14. Press READY when the reading has stabilized in the secondreference condition (may take 30 minutes or more). You canfollow the stabilization from the GRAPH display.15. Enter the correct reference value in the second condition withthe arrow buttons. Press OK.16. Confirm the adjustment by pressing YES (by pressing NO youreturn to adjustment mode display and no changes are made). Ifthe difference between the two reference conditions is less than50 %RH, adjustment cannot be done.17. The adjustment is done. Press BACK and EXIT to return to thebasic display.18. Turn off the MI70 and detach the connection cable.LiCl-NaCl AdjustmentThis adjustment is done using relative humidity references 11.3 % RH(LiCl) and 75.5 % RH (NaCl).Follow steps 1 to 7 on page 30 and continue as follows:8. Remove the filter from the transmitter's probe and insert theprobe head into the LiCl salt chamber.9. Press ADJUST to continue adjusting.