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USER'S GUIDE Vaisala HUMICAP® Indicator HMI41and Probes HMP41/45/46 M210316EN-A

HMI41 AND PROBESOperating Manual M210316EN-A64.65 V, the indicator turns itself off to prevent erroneous measurements andreadings. Should this happ

HMI41 AND PROBESM210316EN-A Operating Manual74.3 HOLD-modeIn any of the previously mentioned measurement reading displays, the buttonHOLD freezes the

HMI41 AND PROBESOperating Manual M210316EN-A85. CALIBRATIONThe HMI41 indicator and probes are fully calibrated at the factory, so thereshould be no

HMI41 AND PROBESM210316EN-A Operating Manual9The calibration procedure is as follows (see also the calibrator manual):• Leave the calibrator and the

HMI41 AND PROBESOperating Manual M210316EN-A10 As the D (dry) and W (wet) adjustments may affect each other, check againthe humidity reading in the

HMI41 AND PROBESM210316EN-A Operating Manual11Press ENTER eight times until the following text appears:setThis indicates that no calibration has been

HMI41 AND PROBESOperating Manual M210316EN-A12In setup mode, press ENTER repeatedly until the following is displayed:setThen press MODE twice, and

HMI41 AND PROBESM210316EN-A Operating Manual13calibration. If the calibration has been successful, the following messageappears:The correction data ha

HMI41 AND PROBESOperating Manual M210316EN-A14Press ENTER to activate the two point humidity calibration mode. A messagesimilar to the following ap

HMI41 AND PROBESM210316EN-A Operating Manual15RHset%Press ENTER and the HMI41 indicator shows the value that the probe iscurrently measuring, displayi

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HMI41 AND PROBESOperating Manual M210316EN-A16setThen press MODE four times, and the following appears:setTPress ENTER to activate the one point te

HMI41 AND PROBESM210316EN-A Operating Manual17The correction data has now been calculated and stored in the HMI41 memory.The HMI41 returns automatical

HMI41 AND PROBESOperating Manual M210316EN-A18setLoT°CThe blinking number indicates the value of the lower temperature referencestored in the HMI41

HMI41 AND PROBESM210316EN-A Operating Manual19HiT°CWait at least ten minutes for the reading to stabilize and press ENTER toacknowledge the value. Pre

HMI41 AND PROBESOperating Manual M210316EN-A206. HMI41 AND DATA COLLECTING The HMI41 indicator can also be used for collecting the measurement data

HMI41 AND PROBESM210316EN-A Operating Manual216.2 Manual data collecting For manual data collecting, press the button MODE and the following appears:P

HMI41 AND PROBESOperating Manual M210316EN-A22 6.3 Setting the measurement duration Turn the indicator on with the ON/OFF button, press immediately

HMI41 AND PROBESM210316EN-A Operating Manual23 Select the interval with buttons ▲ and ▼. The measurement interval can beselected in steps according to

HMI41 AND PROBESOperating Manual M210316EN-A24estimate the time of the measurement stored during automatic data collectingprovided that the starti

HMI41 AND PROBESM210316EN-A Operating Manual25 6.5.1 MIN and MAX in data collecting REC READ mode When the data collecting REC READ mode has been acti

HMI41 AND PROBESM210316EN-A Operating ManualiContents1. THE HMI41 INDICATOR AND PROBES...

HMI41 AND PROBESOperating Manual M210316EN-A26 7. TRANSFERRING THE STORED READINGS TO A PCThe readings that have been stored in the HMI41 memory ma

HMI41 AND PROBESM210316EN-A Operating Manual27Figure 7.1.1 Giving the communication parameters in Windows 3.1NOTE: select theconnectoraccording toyour

HMI41 AND PROBESOperating Manual M210316EN-A28Table 7.1.2 Giving parameters in Windows 95 and Windows NTWINDOWS 95 WINDOWS NTMENU WHAT TO DO MENU W

HMI41 AND PROBESM210316EN-A Operating Manual29Figure 7.1.2 Selecting the parameters in Windows 95 and NT7.2 Transferring the dataWhen you have given t

HMI41 AND PROBESOperating Manual M210316EN-A307.2.1 PLAY Transferring the dataTo transfer the data on your PC, type PLAY and press ENTER. An examp

HMI41 AND PROBESM210316EN-A Operating Manual31>To change the output, type CPLAY, then the character you wish to appearbetween decimals, then the ch

HMI41 AND PROBESOperating Manual M210316EN-A32To exit the terminal session, go to FILE menu and select EXIT. Confirm thatyou wish to quit and then

HMI41 AND PROBESM210316EN-A Operating Manual338. CHANGING THE SETTINGSThe HMI41 settings can be changed in the SETUP mode. It is necessary to givethe

HMI41 AND PROBESOperating Manual M210316EN-A34set°CYou can scroll the setup menu by pressing ENTER.8.2 Selecting the display unitsset°CYou can now

HMI41 AND PROBESM210316EN-A Operating Manual358.4 Selecting the display quantitiessetThe HMI41 displays relative humidity, temperature and dewpoint te

HMI41 AND PROBESOperating Manual M210316EN-Aii10. IN CASE OF ERROR...

HMI41 AND PROBESOperating Manual M210316EN-A368.6 Selecting the probe typesetIf necessary, change the setting with buttons ▲ and ▼. You have nowcom

HMI41 AND PROBESM210316EN-A Operating Manual379. MAINTENANCE9.1 Changing the HUMICAP180 humidity sensorUnscrew the plastic grid (HMP41&45) or the

HMI41 AND PROBESOperating Manual M210316EN-A389.4 Spare parts and accessoriesOrder code DescriptionHMP41 RH & T probe; for fixed mountingHMP42

HMI41 AND PROBESM210316EN-A Operating Manual3910. IN CASE OF ERRORThe HMI41 goes through a continuous self-diagnostic procedure. If anyproblems occur,

HMI41 AND PROBESOperating Manual M210316EN-A4010.2 Checking the settingsTurn the HMI41 on and enter the setup mode (see Chapter 8). Make sure thatt

HMI41 AND PROBESM210316EN-A Operating Manual4111. TECHNICAL DATA11.1 HMI41 indicatorMaximum measurementerror caused by the indicatorat 20 °C (for syst

HMI41 AND PROBESOperating Manual M210316EN-A4211.2 HMP41and HMP45 probes11.2.1 Relative humidityMeasurement range 0...100 %RH non-condensingAccurac

HMI41 AND PROBESM210316EN-A Operating Manual4311.3 HMP46 probe11.3.1 Relative humidityMeasurement range 0...100 %RH non-condensingAccuracy (at +20 °C)

HMI41 AND PROBESOperating Manual M210316EN-A4411.3.3 GeneralOperating temperature range -20...+60 °Csensor head -40...+100 °C (temporarily + 180 °C

HMI41 AND PROBESM210316EN-A Operating Manual45Accuracy of mixing ratio (g/kg) withambient pressure of 1013.25 mbarRH/%10 20 30 40 50 60 70 80 90 100T/

HMI41 AND PROBESM210316EN-A Operating Manual11. THE HMI41 INDICATOR AND PROBESThe HMI41 is an easy-to-use portable humidity and temperature indicator

HMI41 AND PROBESOperating Manual M210316EN-A4611.4.2 Accuracies in non-metric unitsAccuracy of dewpoint temperature (°F)RH/%10 20 30 40 50 60 70 80

HMI41 AND PROBESM210316EN-A Operating Manual47Accuracy of wet bulb temperature (°F)RH/%10 20 30 40 50 60 70 80 90 100T/°F-400.36 0.36 0.36 0.36 0.36 0

HMI41 AND PROBESOperating Manual M210316EN-A48APPENDIX 1: QUICK REFERENCE TO COMMANDS1. DISPLAY TEXTS AND OPERATING COMMANDS ...

HMI41 AND PROBESM210316EN-A Operating Manual491. DISPLAY TEXTS AND OPERATING COMMANDSThe HMI41 is used by simply turning it on with the ON/OFF button.

HMI41 AND PROBESOperating Manual M210316EN-A50MODE: outputting of the selected quantitiesRHT°C%Relative humidity and temperature readings are o

HMI41 AND PROBESM210316EN-A Operating Manual512. CALIBRATION WITH THE HMI41 SOFTWAREThis quick reference is meant for those users who already know how

HMI41 AND PROBESOperating Manual M210316EN-A522.2 Two-point humidity calibrationRHset min max hyst hold Lo bat HiPPahg/mTTd°C °F°C°F%Turn the HMI41

HMI41 AND PROBESM210316EN-A Operating Manual532.3 One-point temperature calibrationRHset min max hyst hold Lo bat HiPPahg/mTTd°C °F°C°F%Turn the HMI41

HMI41 AND PROBESOperating Manual M210316EN-A542.4 Two-point temperature calibrationRHset min max hyst hold Lo bat HiPPahg/mTTd°C °F°C°F%Turn the HM

HMI41 AND PROBESM210316EN-A Operating Manual553. DATA COLLECTING MODE3.1 Manual data collectingRHset min max hyst hold Lo bat HiPabs Pag/mTTd °C°F°C°F

HMI41 AND PROBESOperating Manual M210316EN-A2The HMI41 indicator displays relative humidity, temperature and dewpointtemperature readings. In addit

HMI41 AND PROBESOperating Manual M210316EN-A563.2 Setting the measurement duration for automatic data collectingRHset min max hyst hold Lo bat HiPa

HMI41 AND PROBESM210316EN-A Operating Manual573.4 Reading the measurement resultsRHset min max hyst hold Lo bat HiPabs Pag/mTTd °C°F°C°F%Turn the indi

HMI41 AND PROBESOperating Manual M210316EN-A583.4.1 MIN and MAX in the data collecting modeRHminHi°C%In this example, the minimum value of the firs

HMI41 AND PROBESM210316EN-A Operating Manual594. TRANSFERRING THE MEASURED DATA TO A PCGive the communication parameters when using this terminal sess

HMI41 AND PROBESOperating Manual M210316EN-A60Table 4.2 Giving parameters in Windows 95 and Windows NTWINDOWS 95 WINDOWS NTMENU WHAT TO DO MENU WHA

HMI41 AND PROBESM210316EN-A Operating Manual614.2 Using the serial commands4.2.1 PLAY Transferring the dataTo output the stored readings on your compu

HMI41 AND PROBESOperating Manual M210316EN-A62To change the output, type CPLAY, the character you wish to appear betweendecimals, the character you

HMI41 AND PROBESM210316EN-A Operating Manual635. CHANGING THE SETTINGSThe HMI41 factory settings are the following:- display units: 0 (metric)- automa

HMI41 AND PROBESOperating Manual M210316EN-A64NOTEThe HMI41 setup contains further settings (start, baud,seri and calib) that appear after probe ty

WarrantyVaisala hereby represents and warrants all Products manufactured by Vaisala and sold hereunder to be free from defects inworkmanship or mate

HMI41 AND PROBESM210316EN-A Operating Manual32. TO BE NOTED IN THE MEASUREMENT OF HUMIDITYIn the measurement of humidity and especially in calibration

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HMI41 AND PROBESOperating Manual M210316EN-A43. GETTING STARTED3.1 Inserting the batteriesWhen taking the HMI41 indicator into use, first insert th

HMI41 AND PROBESM210316EN-A Operating Manual54. TAKING MEASUREMENTS4.2 Starting the measurementsBefore starting the measurements with the HMI41 and ap