Vaisala HUMICAP HMP41 User Manual
  1. Manuals
  2. Brands
  3. Vaisala Manuals
  4. Test Equipment
  5. HUMICAP HMP41
  6. User manual
Vaisala HUMICAP HMP41 User Manual

Vaisala HUMICAP HMP41 User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

USER'S GUIDE
Vaisala HUMICAP® Indicator HMI41
and Probes HMP41/45/46
M210316EN-A

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the HUMICAP HMP41 and is the answer not in the manual?

Questions and answers

Related Manuals for Vaisala HUMICAP HMP41

Summary of Contents for Vaisala HUMICAP HMP41

  • Page 1 USER'S GUIDE Vaisala HUMICAP® Indicator HMI41 and Probes HMP41/45/46 M210316EN-A...
  • Page 2 The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of...

  • Page 3: Table Of Contents

    HMI41 AND PROBES M210316EN-A Operating Manual Contents THE HMI41 INDICATOR AND PROBES................1 TO BE NOTED IN THE MEASUREMENT OF HUMIDITY ............. 3 GETTING STARTED ......................4 Inserting the batteries..................... 4 Connecting the probes ................... 4 TAKING MEASUREMENTS ....................5 Starting the measurements ..................
  • Page 4 HMI41 AND PROBES Operating Manual M210316EN-A 10. IN CASE OF ERROR ......................39 10.1 Trouble shooting ....................39 10.2 Checking the settings ................... 40 11. TECHNICAL DATA......................41 11.1 HMI41 indicator...................... 41 11.2 HMP41and HMP45 probes ..................42 11.3 HMP46 probe......................43 11.4 Accuracy of the calculated quantities ..............

  • Page 5: The Hmi41 Indicator And Probes

    When equipped with optional calibration cables, the HMI41 can also be used as a field calibrator for most Vaisala transmitters. There are six different probe types that can be used with the HMI41 indicator.
  • Page 6 HMI41 AND PROBES Operating Manual M210316EN-A The HMI41 indicator displays relative humidity, temperature and dewpoint temperature readings. In addition to these, one of the following quantities can also be chosen: absolute humidity, wet bulb temperature or mixing ratio. The indicator also features an automatic power-off function which can be disabled, and a continuously updated display.

  • Page 7: To Be Noted In The Measurement Of Humidity

    HMI41 AND PROBES M210316EN-A Operating Manual TO BE NOTED IN THE MEASUREMENT OF HUMIDITY In the measurement of humidity and especially in calibration it is essential that temperature equilibrium is reached. Even a small difference in temperature between the measured object and the sensor causes an error. If the temperature is +20 C (+68 F) and the relative humidity is 50 %RH, a difference of +1 C between the measured object and the sensor causes an error of +3 %RH.

  • Page 8: Getting Started

    HMI41 AND PROBES Operating Manual M210316EN-A GETTING STARTED Inserting the batteries When taking the HMI41 indicator into use, first insert the batteries (4 pcs of size AA LR6 batteries). Open the lid on back of the device and insert the batteries as indicated in the housing.

  • Page 9: Taking Measurements

    HMI41 AND PROBES M210316EN-A Operating Manual TAKING MEASUREMENTS Starting the measurements Before starting the measurements with the HMI41 and appropriate probe, remember to allow enough time for stabilization. Turn the power on with the ON/OFF button and the following appears: °C °F °C °F set min max...

  • Page 10: Measurement Readings On Display

    HMI41 AND PROBES Operating Manual M210316EN-A 4.65 V, the indicator turns itself off to prevent erroneous measurements and readings. Should this happen, replace the batteries. Measurement readings on display Relative humidity and temperature readings appear automatically after the battery charge indication: °C If MODE is pressed, dewpoint temperature (Td) reading is displayed: °C...

  • Page 11: Hold-Mode

    HMI41 AND PROBES M210316EN-A Operating Manual HOLD-mode In any of the previously mentioned measurement reading displays, the button HOLD freezes the display to show the current readings, e.g. RH & T readings: °C hold With MODE or ENTER, the display returns to the normal display mode. If the indicator turns itself off with the automatic power-off function during the HOLD-mode, it wakes up in the same mode when turned on again.

  • Page 12: Calibration

    1.5 mm slot screwdriver. HMP41 & HMP45 HMP46 Figure 5.1.1 Location of trimmer potentiometers A two point calibration is performed with the HMK15 calibrator or the probe can be sent to Vaisala. The probes must always be recalibrated when the sensor is changed.
  • Page 13 HMI41 AND PROBES M210316EN-A Operating Manual The calibration procedure is as follows (see also the calibrator manual): Leave the calibrator and the probe at the calibration site for at least 30 minutes before starting the calibration in order to let the probe temperature stabilize to the room temperature.

  • Page 14: Calibration With Hmi41 Software Commands

    HMI41 AND PROBES Operating Manual M210316EN-A As the D (dry) and W (wet) adjustments may affect each other, check again the humidity reading in the LiCl salt chamber: insert the probe into the calibration hole and wait until the reading stabilizes. If necessary, repeat the adjustments in both the LiCl and the NaCl (K ) salt chambers until the reading is correct.
  • Page 15 HMI41 AND PROBES M210316EN-A Operating Manual Press ENTER eight times until the following text appears: This indicates that no calibration has been selected. In addition to this, there are five calibration types available. The desired type is selected with buttons .
  • Page 16 HMI41 AND PROBES Operating Manual M210316EN-A In setup mode, press ENTER repeatedly until the following is displayed: Then press MODE twice, and the following appears: Press ENTER to activate the one point calibration mode. A message similar to the following appears with the first line blinking: The blinking number indicates the humidity reference value in the HMI41 memory.
  • Page 17 HMI41 AND PROBES M210316EN-A Operating Manual calibration. If the calibration has been successful, the following message appears: The correction data has now been calculated and stored in the HMI41 memory. The HMI41 returns automatically to the selection of display units, and can be turned off.
  • Page 18 HMI41 AND PROBES Operating Manual M210316EN-A Press ENTER to activate the two point humidity calibration mode. A message similar to the following appears with the first line blinking: The blinking number indicates the value of the lower humidity reference stored in the HMI41 memory. Check the salt chamber temperature, read the closest humidity value in the calibration table and adjust the display with buttons to correspond to the value given in the table.
  • Page 19 HMI41 AND PROBES M210316EN-A Operating Manual Press ENTER and the HMI41 indicator shows the value that the probe is currently measuring, displaying a message similar to the following: Wait at least ten minutes for the reading to stabilize and press ENTER to acknowledge the value.
  • Page 20 HMI41 AND PROBES Operating Manual M210316EN-A Then press MODE four times, and the following appears: Press ENTER to activate the one point temperature calibration mode. A message similar to the following appears with the first line blinking: °C The blinking number indicates the temperature reference value stored in the HMI41 memory.
  • Page 21 HMI41 AND PROBES M210316EN-A Operating Manual The correction data has now been calculated and stored in the HMI41 memory. The HMI41 returns automatically to the selection of the display units, and can be turned off. When the indicator is used as a standard indicator and the correction data differs from the factory settings, an arrow in the upper righthand corner is displayed: °C...
  • Page 22 HMI41 AND PROBES Operating Manual M210316EN-A °C The blinking number indicates the value of the lower temperature reference stored in the HMI41 memory. Insert the probe to the lower reference temperature. Check the reference temperature and change the display with buttons to correspond to the accurate value, for example: °C...
  • Page 23 HMI41 AND PROBES M210316EN-A Operating Manual °C Wait at least ten minutes for the reading to stabilize and press ENTER to acknowledge the value. Press ENTER again to conclude the calibration. If the calibration has been successful, the following message appears: The correction data has now been calculated and stored in the HMI41 memory.

  • Page 24: Hmi41 And Data Collecting

    HMI41 AND PROBES Operating Manual M210316EN-A HMI41 AND DATA COLLECTING The HMI41 indicator can also be used for collecting the measurement data. The data is stored in the indicator's non-volatile memory which means that it is not lost when the indicator is turned off. Please, note also that the automatic power-off function is not active during data collecting even if previously selected (see Chapter 8.3).

  • Page 25: Manual Data Collecting

    HMI41 AND PROBES M210316EN-A Operating Manual Manual data collecting For manual data collecting, press the button MODE and the following appears: Press ENTER and a text similar to the following appears: °C The probe is now taking measurements and you can store the readings at appropriate intervals by pressing the button HOLD.

  • Page 26: Setting The Measurement Duration

    HMI41 AND PROBES Operating Manual M210316EN-A Setting the measurement duration Turn the indicator on with the ON/OFF button, press immediately the button HOLD and keep it pressed until the text appears on the display. REC AUTO Press ENTER and a text similar to the following appears on the display: (previously set duration) In this mode, you can set the time between the first and the last measurement stored, e.g.

  • Page 27: Reading The Measurement Results

    HMI41 AND PROBES M210316EN-A Operating Manual Select the interval with buttons . The measurement interval can be selected in steps according to the following: 1 - 5 min: each pressing = 1 minute 10 min; 15 min; 30 min 1 - 6 h: each pressing = 1 hour 12 h The text ' ' on the display indicates that there is not enough memory for the...
  • Page 28 HMI41 AND PROBES Operating Manual M210316EN-A estimate the time of the measurement stored during automatic data collecting provided that the starting time and the measurement interval are known. Numbers on the right on the second line indicate the temperature reading measured simultaneously with the reading on the first line;...
  • Page 29 HMI41 AND PROBES M210316EN-A Operating Manual 6.5.1 MIN and MAX in data collecting mode REC READ When the data collecting mode has been activated, the HOLD REC READ button brings four different modes on the display: MIN HI MAX HI MIN LO .

  • Page 30: Transferring The Stored Readings To A Pc

    HMI41 AND PROBES Operating Manual M210316EN-A TRANSFERRING THE STORED READINGS TO A PC The readings that have been stored in the HMI41 memory manually or automatically in the data collecting mode, can be transferred to a computer and then printed if desired. In order to do this, connect a serial connection cable (order code 19446ZZ) to the appropriate connectors on your PC and in the HMI41: connect the...
  • Page 31 HMI41 AND PROBES M210316EN-A Operating Manual NOTE: select the connector according to your computer. Select the connector first and give then other para- meters Figure 7.1.1 Giving the communication parameters in Windows 3.1...
  • Page 32 HMI41 AND PROBES Operating Manual M210316EN-A Table 7.1.2 Giving parameters in Windows 95 and Windows NT WINDOWS 95 WINDOWS NT MENU WHAT TO DO MENU WHAT TO DO Start Start ò ò move the cursor to: move the cursor to: Programs Programs ò...

  • Page 33: Transferring The Data

    HMI41 AND PROBES M210316EN-A Operating Manual Figure 7.1.2 Selecting the parameters in Windows 95 and NT Transferring the data When you have given the communication parameters, you can start transferring the data from the HMI41. Note that communication parameters can be stored in the computer for future use. To start transferring the data, make sure that the HMI41 is connected to a serial port of your computer and that the terminal session is open.
  • Page 34 HMI41 AND PROBES Operating Manual M210316EN-A 7.2.1 PLAY Transferring the data To transfer the data on your PC, type and press ENTER. An example of PLAY outputting automatically stored data: >play Reading Log... OK data hh:mm:ss 00:00:00 12.54 21.53 -8.48 00:01:00 12.10 21.23...
  • Page 35 HMI41 AND PROBES M210316EN-A Operating Manual > To change the output, type , then the character you wish to appear CPLAY between decimals, then the character you wish to use between fields and then <cr>. An example: >cplay , <cr> Desimal separator : , Field separator : TAB...
  • Page 36 HMI41 AND PROBES Operating Manual M210316EN-A To exit the terminal session, go to menu and select . Confirm that FILE EXIT you wish to quit and then select whether you wish to store the parameters of this session for future use or not ( SAVE...

  • Page 37: Changing The Settings

    HMI41 on with the ON/OFF button. The version appears on the display in a couple of seconds if it is 1.02 or greater. If it does not appear, contact Vaisala or a Vaisala representative for further information. Entering the setup mode Enter the setup mode by pressing the ON/OFF button.

  • Page 38: Selecting The Display Units

    HMI41 AND PROBES Operating Manual M210316EN-A °C You can scroll the setup menu by pressing ENTER. Selecting the display units °C You can now select the display units with buttons . Choose 0 for metric units or 1 for non-metric units (see Table 8.2). The temperature unit on the display changes accordingly.

  • Page 39: Selecting The Display Quantities

    HMI41 AND PROBES M210316EN-A Operating Manual Selecting the display quantities The HMI41 displays relative humidity, temperature and dewpoint temperature readings. In addition to these, one of the following quantities can be chosen: absolute humidity, wet bulb temperature and mixing ratio. The number on the display indicates the following quantities: 0 = RH, T, Td 1 = RH, T, Td, abs...

  • Page 40: Selecting The Probe Type

    HMP44/44L probes ( 5, see the HM44 START Operating Manual). For calib, see Chapter 5. Other settings are meant for the HMI41 used as a field calibrator for other Vaisala humidity transmitters. It is recommended that these settings are not changed.

  • Page 41: Maintenance

    Bases 10 000...100 000 If necessary, request detailed information on allowed concentrations from Vaisala representatives. Using the HMP46 in high temperatures The HMP46 probe can be temporarily used in high temperatures. For example, the probe can be installed in +180 °C for 30 minutes provided that the probe handle and 10 cm of the metal tube are at room temperature.

  • Page 42: Spare Parts And Accessories

    HM36736 Carrying case (HMI41,HMP41 and HMP45) HM27104 Carrying case (HMI41 and HMP42) HM36939 Probe holder for HMP46 (used in the calibration of Vaisala’s duct mounted transmitters) 19446ZZ Serial interface cable for HMI41 19116ZZ Calibration cable (for HMD/W60/70, HMP140 series) 19164ZZ...

  • Page 43: In Case Of Error

    WHAT TO DO: - check the batteries (see Chapters 3.1 and 9.1) the display is blank - if the batteries are ok, contact Vaisala or a Vaisala representative the display is dim - during automatic data collecting, the display is dim...

  • Page 44: Checking The Settings

    If the settings are not correct, change them: in the setup mode, select the setting with ENTER, change it with buttons and acknowledge with ENTER. If the error message still appears, write it down and contact Vaisala or a Vaisala representative for further instructions.

  • Page 45: Technical Data

    HMI41 AND PROBES M210316EN-A Operating Manual TECHNICAL DATA 11.1 HMI41 indicator Maximum measurement error caused by the indicator at 20 C (for system accuracy, see probes’ technical specifications) humidity +0.1 %RH temperature +0.1 C Calculated variables dewpoint temperature, absolute humidity, wet bulb temperature, mixing ratio Resolution 0.1 %RH;...

  • Page 46: Hmp41And Hmp45 Probes

    HMI41 AND PROBES Operating Manual M210316EN-A 11.2 HMP41and HMP45 probes 11.2.1 Relative humidity Measurement range 0...100 %RH non-condensing Accuracy (at +20 °C) when calibrated against salt solutions (ASTM E104-85): 2 %RH (0...90 %RH) 3 %RH (90...100 %RH) Temperature dependence of electronics ±0.05 %RH/ C Typical long-term stability better than 1 %RH per year...

  • Page 47: Hmp46 Probe

    HMI41 AND PROBES M210316EN-A Operating Manual 11.3 HMP46 probe 11.3.1 Relative humidity Measurement range 0...100 %RH non-condensing Accuracy (at +20 °C); maximum achievable accuracy when calibrated against high quality, certified humidity standards 1 %RH (0...90 %RH) 2 %RH (90...100 %RH) when calibrated against salt solutions (ASTM E104-85): 2 %RH (0...90 %RH)

  • Page 48: Accuracy Of The Calculated Quantities

    HMI41 AND PROBES Operating Manual M210316EN-A 11.3.3 General Operating temperature range -20...+60 C sensor head -40...+100 C (temporarily + 180 C) Storage temperature range -40...+80 C Material: handle ABS plastic pipe stainless steel cable PVC spiral cable Housing classification (electronics) IP65 (NEMA 4) Weight 450 g (incl.
  • Page 49 HMI41 AND PROBES M210316EN-A Operating Manual Accuracy of mixing ratio (g/kg) with ambient pressure of 1013.25 mbar RH/% 0.002 0.002 0.002 0.002 0.003 0.003 0.003 0.003 T/ C 0.014 0.015 0.017 0.018 0.019 0.020 0.022 0.023 0.08 0.09 0.09 0.10 0.10 0.11 0.12...
  • Page 50 HMI41 AND PROBES Operating Manual M210316EN-A 11.4.2 Accuracies in non-metric units Accuracy of dewpoint temperature (°F) RH/% 3.28 1.80 1.33 1.10 0.96 0.86 0.80 0.75 T/ F 3.76 2.05 1.50 1.22 1.06 0.95 0.88 0.82 4.52 2.47 1.80 1.46 1.26 1.13 1.03 0.96...

  • Page 51: Electromagnetic Compatibility

    HMI41 AND PROBES M210316EN-A Operating Manual Accuracy of wet bulb temperature (°F) RH/% 0.36 0.36 0.36 0.36 0.36 0.36 0.36 0.37 T/ F 0.37 0.38 0.38 0.38 0.39 0.39 0.40 0.40 0.49 0.50 0.51 0.51 0.52 0.53 0.54 0.55 0.55 0.56 0.82 0.81...

  • Page 52: Appendix 1 Quick Reference Guide

    HMI41 AND PROBES Operating Manual M210316EN-A APPENDIX 1: QUICK REFERENCE TO COMMANDS 1. DISPLAY TEXTS AND OPERATING COMMANDS ..............49 2. CALIBRATION WITH THE HMI41 SOFTWARE ..............51 2.1 One-point humidity calibration................51 2.2 Two-point humidity calibration................52 2.3 One-point temperature calibration..............53 2.4 Two-point temperature calibration..............

  • Page 53: Display Texts And Operating Commands

    If the software version does not appear, it is less than 1.02 and the HMI41 can- not be used with the HMP46; contact Vaisala or a Vaisala representative. If the probe type indi- cation (41.45 or 42.46) does not appear, the indicator does not recognize the probe type automatically;...
  • Page 54 HMI41 AND PROBES Operating Manual M210316EN-A MODE: outputting of the selected quantities Relative humidity and temperature readings are output (automatically after power-up). °C PRESS MODE (the following appears): Dewpoint temperature and temperature readings are output. PRESS MODE (return to the normal RH&T °C display or one of the following appears): °C...

  • Page 55: Calibration With The Hmi41 Software

    HMI41 AND PROBES M210316EN-A Operating Manual CALIBRATION WITH THE HMI41 SOFTWARE This quick reference is meant for those users who already know how to use the HMI41 indicator. The operating manual gives more detailed instructions. NOTE: it is recommended that the calibration is done with trimmer potentiometers of the probe.

  • Page 56: 2.2 Two-Point Humidity Calibration

    HMI41 AND PROBES Operating Manual M210316EN-A 2.2 Two-point humidity calibration Turn the HMI41 indicator on. Within 1-2 seconds °C °F press simultaneously buttons MODE and HOLD °C °F until the text SEtUP appears. set min max hyst hold Lo bat Hi Wait a few seconds.

  • Page 57: 2.3 One-Point Temperature Calibration

    HMI41 AND PROBES M210316EN-A Operating Manual 2.3 One-point temperature calibration Turn the HMI41 indicator on. Within 1-2 seconds °C °F press simultaneously buttons MODE and HOLD °C °F until the text SEtUP appears. set min max hyst hold Lo bat Hi Wait a few seconds.

  • Page 58: 2.4 Two-Point Temperature Calibration

    HMI41 AND PROBES Operating Manual M210316EN-A 2.4 Two-point temperature calibration Turn the HMI41 indicator on. Within 1-2 seconds °C °F press simultaneously buttons MODE and HOLD °C °F until the text SEtUP appears. set min max hyst hold Lo bat Hi Wait a few seconds.

  • Page 59: Data Collecting Mode

    HMI41 AND PROBES M210316EN-A Operating Manual DATA COLLECTING MODE Manual data collecting Turn the indicator on. Within 1 - 2 seconds press °C°F the button HOLD until the text appears, REC AUTO °C°F Pabs then release the button. set min max hyst hold Lo bat Hi Press the button MODE to enter the manual data collecting.

  • Page 60: Setting The Measurement Duration For Automatic Data Collecting

    HMI41 AND PROBES Operating Manual M210316EN-A Setting the measurement duration for automatic data collecting Turn the indicator on. Within 1 - 2 seconds press °C°F the button HOLD until the text appears, REC AUTO °C°F Pabs then release the button. set min max hyst hold Lo bat Hi Press ENTER when the text...

  • Page 61: Reading The Measurement Results

    HMI41 AND PROBES M210316EN-A Operating Manual Reading the measurement results Turn the indicator on. Within 1 - 2 seconds press °C°F the button HOLD until the text appears, REC AUTO °C°F Pabs then release the button. set min max hyst hold Lo bat Hi Press twice the button MODE.

  • Page 62: Min And Max In The Data Collecting Mode

    HMI41 AND PROBES Operating Manual M210316EN-A 3.4.1 MIN and MAX in the data collecting mode In this example, the minimum value of the first line reading is being observed ( = minimum, = the °C first line reading); press ENTER to see the T reading with decimals.

  • Page 63: Transferring The Measured Data To A Pc

    HMI41 AND PROBES M210316EN-A Operating Manual TRANSFERRING THE MEASURED DATA TO A PC Give the communication parameters when using this terminal session for the first time; save them for future use. See instructions in the following tables. Table 4.1 Giving parameters in Windows 3.1 MENU DESCRIPTION ROGRAM...
  • Page 64 HMI41 AND PROBES Operating Manual M210316EN-A Table 4.2 Giving parameters in Windows 95 and Windows NT WINDOWS 95 WINDOWS NT MENU WHAT TO DO MENU WHAT TO DO Start Start ò ò move the cursor to: move the cursor to: Programs Programs ò...

  • Page 65: Using The Serial Commands

    HMI41 AND PROBES M210316EN-A Operating Manual Using the serial commands 4.2.1 PLAY Transferring the data To output the stored readings on your computer, turn the HMI41 on, type PLAY and press ENTER. An example of outputting automatically stored readings: >play Reading Log...

  • Page 66: Help Outputting Available Commands And Their Contents

    HMI41 AND PROBES Operating Manual M210316EN-A To change the output, type , the character you wish to appear between CPLAY decimals, the character you wish to use between fields and then <cr>. An example: >cplay , <cr> Desimal separator : , Field separator : TAB example:...

  • Page 67: Changing The Settings

    HMI41 AND PROBES M210316EN-A Operating Manual CHANGING THE SETTINGS The HMI41 factory settings are the following: - display units: (metric) - automatic power-off: (minutes) - display quantities: (RH, T and Td) - pressure: 1013.25 hPa (1 hPa = 1 mbar) - probe type: (or 1, see below) - start:...
  • Page 68 HMP44/L probes ( 5, see the HM44 START Operating Manual). For calib, see the operating manual. Other settings are meant for the HMI41 used as a field calibrator for Vaisala humidity transmitters. Do not change them. Press ON/OFF after probe type setting.

  • Page 69: Warranty

    Defective parts replaced in accordance with this clause shall be placed at the disposal of Vaisala. Vaisala also warrants the quality of all repair and service works performed by its employees to products sold by it. In case the...
  • Page 72 *M210316EN*...

This manual is also suitable for:

Humicap hmp45Humicap hmp46

Table of Contents