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Summary of Contents for Vaisala HUMICAP HM44
- Page 1 USER'S GUIDE Vaisala HUMICAP® Set for Measuring Humidity in Concrete HM44 M010068EN-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...
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Page 3: Table Of Contents
HUMIDITY MEASUREMENTS IN CONCRETE ...........13 General about humidity measurements in a drilled hole ...13 Measurement depth..............13 Maximum humidity levels for coating ........15 Preparations for the measurements ........16 Starting the measurements ...........18 Measurement readings on display........19 HOLD-mode ................19 MIN and MAX modes ............19 VAISALA ___________________________________________________________________... - Page 4 User's Guide _______________________________________________________________________ CHAPTER 6 COLLECTING DATA ................... 21 Data collecting modes............21 Entering the data collecting modes........21 Automatic data collecting mode ......22 REC AUTO Setting the measurement duration........22 Setting the measurement interval ........23 Manual data collecting ........
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Page 5: Chapter 1 General Information
NOTE Note highlights important information on using the product. Version Information Table 1 Manual Revisions Manual Code Description U254en-1.3 March 1998 M010068en-A VAISALA ___________________________________________________________________... -
Page 6: Warranty
The allegedly defective Product or part shall, expressly cancelled and waived. Vaisala's liability should Vaisala so require, be sent to the works of shall under no circumstances exceed the invoice Vaisala or to such other place as Vaisala may... -
Page 7: Chapter 2 Product Description
CHAPTER 2 PRODUCT DESCRIPTION The HM44 set is a practical tool for humidity measurements of concrete or other structures. The accuracy and reliability performance of the HMP44 probe comes from advanced Vaisala HUMICAP© 180 sensor. The HM44 package includes: • HMP44 humidity and temperature probe •... -
Page 8: To Be Noted When Measuring Humidity
User's Guide _______________________________________________________________________ CHAPTER 3 TO BE NOTED WHEN MEASURING HUMIDITY Temperature of the probe and the concrete shall be the same! In humidity measurement and especially in calibration it is essential that temperature of the probe and measured object is the same. Even a small difference in temperature between the measured object and the probe causes an error. -
Page 9: Taken Into Use
- When using more than one probe, firstly select a number for the probe and then feed the probe individual coefficients to the HMI41 memory. Remember to write the probe number (1-10) in the product label to be able to identify the probes afterwards. VAISALA __________________________________________________________________________... -
Page 10: Numbering The Probes
User's Guide _______________________________________________________________________ Numbering the probes The first number of the second line of display indicates the currently selected probe (1-10). Connect a probe and change the number on the display by pressing ENTER and simultaneously buttons L or M. Remember to write the probe number (1-10) in the product label to be able to identify the probes. -
Page 11: Changing The Settings
Turn the device ON (by using ON/OFF button) and immediately (within 1..2 seconds) after turning on, press together both the buttons ENTER and MODE for about 3 seconds, until the following appears: In a few seconds, the text changes automatically to the following: °C VAISALA __________________________________________________________________________... -
Page 12: Display Units
User's Guide _______________________________________________________________________ Display units °C • Select the display units with buttons L or M. Choose 0 for metric units or 1 for non- metric units (see Table 1). • Press ENTER and the display changes to show the setting of the automatic power-off function. -
Page 13: Selecting The Display Quantities
• change the pressure (in steps of 0.25 hPa) with buttons L and M • press ENTER; the display now changes to show the text PROBE n (n=probe number). Change this setting only if there is no ID-marking on the indicator label. Otherwise do not change this setting. VAISALA __________________________________________________________________________... -
Page 14: Setting The Probe Type
User's Guide _______________________________________________________________________ Setting the probe type In cases where an indicator (or a probe) is without an ID-marking, the following probe numbers have to be selected: Probe Probe setting HMP41 HMP42 HMP44 1...10 HMP45 HMP46 • change the setting with buttons L and M With the probe HMP44 there is no need to change the setting. -
Page 15: Humidity Measurements In Concrete
The humidity profile of the slab depends on the drying of the concrete, i.e. whether the concrete dries in one or in two directions. In concrete slabs drying in two directions, the humidity is highest in the middle. After coating, the humidity spreads evenly throughout the VAISALA __________________________________________________________________________... - Page 16 User's Guide _______________________________________________________________________ slab until it corresponds to readings measured at the depth of approximately 20% of the slab. In concrete slabs drying in one direction only, the humidity is highest at the bottom. After coating, the humidity spreads evenly throughout the slab until it corresponds to readings measured at the depth of approximately 40% of the slab.
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Page 17: Maximum Humidity Levels For Coating
Plastic floor coverings without felt or cellular plastic base Linoleum (Cork) Man-made fibre textile floor coverings without base structure Epoxy mass Acrylic mass Polyester plastic mass SisäRYL 2000 Code of Building practice, RT 14-10668, 2000, ISBN 951-682-506-0, page 318. VAISALA __________________________________________________________________________... -
Page 18: Preparations For The Measurements
User's Guide _______________________________________________________________________ Preparations for the measurements The holes shall be drilled 3 days before the measurements. A plastic sleeve and an installation cover are placed to the hole immediately after drilling. A probe can be placed to the plastic sleeve immediately after drilling or before measurements. - Page 19 Alternatively, you can insert the probe into the sleeve about 30 minutes before starting the measurements. In this case, close the cable lead-through of a rubber plug with its cap as shown in the photo, and seal the sleeve with the plug: VAISALA __________________________________________________________________________...
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Page 20: Starting The Measurements
User's Guide _______________________________________________________________________ Figure 5.5 Close the cable lead-through of the rubber plug However, we recommend that you leave the probe into the sleeve as this ensures the best possible reliability of the readings. When the concrete is dry enough and measurements are no longer necessary, pull the probe out with the installation cover and the sleeve. -
Page 21: Measurement Readings On Display
(if the text ‘hold’ is blinking, the HMI41 must first be returned to the normal display mode, see previous section): °C The indicator returns to the normal display mode with buttons MODE or ENTER. VAISALA __________________________________________________________________________... - Page 22 User's Guide _______________________________________________________________________ If you press the button HOLD when the indicator is in the MIN mode, the maximum readings measured after power-up appear: °C The indicator returns to the normal display mode with any button except ON/OFF. _________________________________________________________________________________...
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Page 23: Chapter 6 Collecting Data
With the button MODE you can REC AUTO enter the mode (manual data collecting, see page 24) and by pressing MODE REC CATCH again, the mode (reading the measurement results, see page 25). REC READ VAISALA __________________________________________________________________________... -
Page 24: Automatic Data Collecting Mode Rec Auto
User's Guide _______________________________________________________________________ Automatic data collecting mode REC AUTO Enter the mode as instructed on page 21. REC AUTO Setting the measurement duration 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 25: Setting The Measurement Interval
If the indicator is turned off, the measurements stored so far remain in the memory and they can be read by turning the indicator on in the mode (see page 25). You can end data collecting by pressing ON/OFF. READ VAISALA __________________________________________________________________________... -
Page 26: Manual Data Collecting Rec Catch
User's Guide _______________________________________________________________________ Manual data collecting REC CATCH Enter the mode, see page 21. REC CATCH 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 27: Reading The Measurement Results Rec Read
In a couple of seconds the indicator returns to the previous display. Press MODE to change the quantity on the first line: °C °C When you press ENTER (with any quantity on the first line), an arrow appears on the higher right hand corner of the display: VAISALA __________________________________________________________________________... -
Page 28: Min And Max In Data Collecting Rec Read Mode
User's Guide _______________________________________________________________________ °C Press HOLD while the arrow is displayed to scroll the measurement results (note that the sequence number changes): °C HOLD °C etc. If the button HOLD is pressed continuously, numbers change in a faster rate. MIN and MAX in data collecting REC READ mode When the data collecting... - Page 29 (decimals of the 2nd line) HOLD ENTER °C °C Returns automatically (decimals of the 2nd line) (minimum reading of the 2nd line quantity) HOLD ENTER °C °C Returns automatically (maximum reading of the 2nd line reading) (decimals of the 2nd line) VAISALA __________________________________________________________________________...
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Page 30: Transferring Data To A Pc
User's Guide _______________________________________________________________________ CHAPTER 7 TRANSFERRING DATA 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: Giving The Communication Parameters
HMI41) and click OK Turn the HMI41 on, and follow the instructions on page NOTE: select the connector accord- ing to your computer. Select the connector first and give then other parameters Figure 7.2 Giving the communication parameters in Windows 3.1 VAISALA __________________________________________________________________________... - Page 32 User's Guide _______________________________________________________________________ Table 7.2 Giving parameters in Windows 95/98 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 ò...
- Page 33 Chapter 7 _____________________________________________________ Transferring data to a pc Figure 7.3. Communication parameter selection window. VAISALA __________________________________________________________________________...
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Page 34: Transferring The Data
User's Guide _______________________________________________________________________ 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 35: Cplay Setting Characters Between Decimals And Fields
Type HELP <command_name> for more help > To see the contents of each command, type , command name (e.g. ) and press HELP PLAY ENTER; this brings an explanation of the command and its usage on the display: VAISALA __________________________________________________________________________... -
Page 36: Outputting The Hmi41 Settings
User's Guide _______________________________________________________________________ >help play Command : PLAY Purpose : Send recordings from memory to serial port Usage : PLAY hh:mm <cr>, hh:mm = rec starting time (optional) if command is used without parameters it uses default setting > ? Outputting the HMI41 settings If you need to know which parameters and settings are currently stored in your HMI41 indicator, type ? and press ENTER: >? -
Page 37: Chapter 8 Calibration
5 seconds continuously and the offset correction is displayed; press ENTER once more and the gain correction is displayed. Calibration mode The calibration can be performed with Vaisala HMK15 calibrator and saturated salt solutions. Check the reference values from the calibration table below: Temperature °C... - Page 38 User's Guide _______________________________________________________________________ After a few seconds, the text changes automatically to show the following: °C Press ENTER repeatedly until the following appears: This indicates that no calibration has been selected. In addition to this, there are five calibration types available. Select the desired type with buttons L or M. All selections are acknowledged with ENTER.
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Page 39: Two-Point Humidity Calibration
Press ENTER, and the HMI41 shows the value that the probe is currently measuring. Wait for the reading to stabilize (about 30 minutes) and then press ENTER. Now the lower humidity value is corrected to the given low reference. Press ENTER again to conclude the VAISALA __________________________________________________________________________... - Page 40 User's Guide _______________________________________________________________________ lower point calibration. A message similar to the following appears with the first line blinking: The blinking number indicates the value of the higher humidity reference stored in the HMI41 memory. Insert the probe to the higher reference humidity. Check the salt chamber temperature, read the closest humidity value in the calibration table and adjust the display with buttons L and M to correspond to the value given in the table.
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Page 41: Chapter 9 Maintenance
Remove damaged sensor and insert a new one. Handle the sensor from the plastic frame; do not touch the sensor plate. Calibrate the probe (with a new sensor) with the calibrator HMK15. The probe can be sent to Vaisala service for sensor change. Replacing the filter The combination of a grid (of the probe head) and the membrane filter can be changed if needed (order code 17039HM). -
Page 42: Chapter 10 Troubleshooting
User's Guide _______________________________________________________________________ CHAPTER 10 TROUBLESHOOTING Erroneous readings If any of the following points is neglected, the readings may result erroneous. Therefore, follow these instructions carefully: • clean the hole carefully (by blowing air or with a vacuum cleaner) • follow the indications of the recommended hole depths (see page 13) •... - Page 43 PROBLEM: WHAT TO DO: • check the batteries the display is blank • if the batteries are in order, contact Vaisala or a Vaisala representative • during automatic data collecting, the display is the display is dim dim except when the readings are updated (once a minute) •...
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Page 44: Spare Parts And Accessories
User's Guide _______________________________________________________________________ CHAPTER 11 SPARE PARTS AND ACCESSORIES Order code Description HMP41 RH & T probe; for fixed mounting HMP42 RH & T probe; for tight spaces HMP44 RH & T probe with 0.3 m cable HMP44L RH & T probe with 2.7 m cable HMP45 RH &... -
Page 45: Optional Probes
• HMP46 consists of a 32 cm long probe head of stainless steel; the HMP46 is optimized for measurements in relatively high temperatures (up to +100°C, temporarily even +180 °C), in dirty processes and in general in applications that require a robust probe structure. VAISALA __________________________________________________________________________... -
Page 46: Chapter 12 Technical Data
User's Guide _______________________________________________________________________ CHAPTER 12 TECHNICAL DATA HMP44 probe Humidity Measurement range 0...100 %RH non-condensing ±2 %RH (0...90%RH) Accuracy at +20°C: ±3 %RH (90...100%RH) Temperature dependence: -0.5 -1.0 -1.5 °C Typical long-term stability in air 1 %RH/year Response time (90%) at +20°C in still air 15 seconds ®... -
Page 47: Hmi41 Indicator
20 °C: humidity +0.1 %RH +0.1 °C temperature Calculated variables dewpoint temperature, absolute humidity, wet bulb temperature, mixing ratio 0.1 %RH; 0.1 °C Resolution Power supply 4 batteries, type AA (IEC LR6) VAISALA __________________________________________________________________________... - Page 48 User's Guide _______________________________________________________________________ Battery operation time 72 h continuous use Operating humidity range 0...100 %RH non-condensing -20...+60 °C Operating temperature -40...+70 °C Storage temperature Display two line LCD Housing material ABS plastic Housing classification IP 53 (with connectors blocked) Connector type modular connector Weight (incl.
- Page 49 Chapter 12 ____________________________________________________________ Technical data APPENDIX 1: Example of a calibration certificate. Adjustment coefficients VAISALA __________________________________________________________________________...
- Page 52 *M010068EN*...
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