USER'S GUIDE Vaisala HUMICAP® Hand-Held Humidity and Temperature Meter HM70 M210297EN-E
PUBLISHED BY Vaisala Oyj P.O. Box 26 FIN-00421 Helsinki Finland Phone (int.): +358 9 8949 1 Fax: +358 9 8949 2227 Visit our Internet pages at http://www.vaisala.com/ © Vaisala 2007 No part of this manual may be reproduced in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be communicated to a third party without prior written permission of the copyright holder. The contents are subject to change without prior notice.
________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION............................................................................ 5 About This Manual ................................................................... 5 Version Information ............................................................... 5 General Safety Considerations............................................... 5 Recycling ........................................
User's Guide ______________________________________________________________________ Selecting Language.............................................................24 Automatic Power OFF .........................................................25 Changing Shortcut Keys......................................................25 Button Click and Backlight on Button Press........................26 Setting Date and Time.........................................................26 Device Information .................
________________________________________________________________________________ Field Checking and Adjustment by Using a Calibrated Reference Probe ................................................................. 50 1-Point Adjustment by Using a Calibrator ........................... 50 2-Point Adjustment by Using a Calibrator ........................... 51 Calibration and Adjustment of HMT330 Series Transmitters................................................................
User's Guide ______________________________________________________________________ Typical Ranges....................................................................72 Accuracies of Calculated Variables................................73 Accuracy of Dewpoint Temperature °C..........................73 Accuracy of Mixing Ratio g/kg........................................73 Accuracy of Wet Bulb Temperature °C ..........................74 Accuracy of Absolute Humidity g/m³ ..............................
Chapter 1 ________________________________________________________ General Information CHAPTER 1 GENERAL INFORMATION About This Manual This manual provides information for operating, and maintaining the Vaisala HUMICAP® Hand-Held Humidity and Temperature Meter HM70.
User's Guide ______________________________________________________________________ CAUTION Caution warns you of a potential hazard. If you do not read and follow instructions carefully at this point, the product could be damaged or important data could be lost. NOTE Note highlights important information on using the product. Recycling Recycle all applicable material. Dispose of batteries and the unit according to statutory regulations. Do not dispose of with regular household refuse.
Chapter 1 ________________________________________________________ General Information Warranty Vaisala hereby represents and warrants all Products manufactured by Vaisala and sold hereunder to be free from defects in workmanship or material during a period of twelve (12) months from the date of delivery save for products for which a special warranty is given.
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Chapter 2 ________________________________________________________ Product Description CHAPTER 2 PRODUCT DESCRIPTION Vaisala HUMICAP® Hand-Held Temperature and Humidity Meter HM70 HM70 consists of two main units: MI70 indicator and HMP75/HMP76/HMP77 probe. HM70 Hand-held humidity meter incorporates Vaisala's advanced HUMICAP® technology which enables reliable and high performance humidity measurement.
User's Guide ______________________________________________________________________ 2) Td shows dewpoint over water throughout the entire measurement range.
________________________________________________________________ Product Description 1 2 3 Probe filter Probe HMP75/76/77 Calibration button under the1 screw 1 2 3 HMP76 PROBE HMP75 PROBE Basic probe for relative humidity and temperature measurement Preheat and chemical purge options available (HMP75B). Figure 2 Rugged probe with a long stainless steel shaft. Preheat and chemical purge options available (HMP76B). HMP77 PROBE Cable probe for industrial processes up to 180 °C.
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Chapter 3 ____________________________________________________ Preparations Before Use CHAPTER 3 PREPARATIONS BEFORE USE Installing and Recharging the Batteries 1. If you are using alkaline batteries, remove the back plate of the indicator and insert the batteries. If the HM70 is ordered with a rechargeable battery pack, it is already in place as shipped from the factory. 2.
User's Guide ______________________________________________________________________ Turning ON the Device 1. Connect the probe to the either of the base connectors of the indicator. 2. Press the 3. Select the language by using the buttons. Confirm by pressing SELECT. You can select the language later as well, see page 24. 4. To change the date, select Date and press SET. Change the date by using any of the buttons. To confirm the date, press OK.
Chapter 4 ______________________________________________________ Taking Measurements CHAPTER 4 TAKING MEASUREMENTS If you are starting the HM70 for the first time, see Chapter 3 Preparations Before Use first. To take measurements with the HM70, follow the instructions below: CAUTION 1. Connect the probe to MI70-indicator. 2. Press 3. If you have a chemical purge option in your probe (HM70 series probe versions B), remember to carry out chemical purge regularly, see page 34. 4.
User's Guide ______________________________________________________________________ Beware of Temperature Differences In humidity measurement and especially in calibration it is essential that temperature of the probe and measuring environment is the same. Even a small difference in temperature between the environment and the probe causes an error.
Chapter 5 _________________________________________________ Buttons, Displays and Menus CHAPTER 5 BUTTONS, DISPLAYS AND MENUS Buttons and Navigation To open a menu view 1. Press an arrow button 2. Press this shortcut button Shortcut buttons Arrow buttons Power ON/OFF Figure 4 MI70 buttons Press down the POWER ON/OFF button until the indicator turns on/off. Press the SHORTCUT buttons to activate the function shown above the button. Press any of the ARROW buttons to open the MENUS.
User's Guide ______________________________________________________________________ Basic Display 5 6 1 2 Figure 5 3 4 MI70 basic display 1. Selected quantities. Up to three of the quantities can be selected at a time.
Chapter 5 _________________________________________________ Buttons, Displays and Menus Graphical Display Graphical display shows you the measurements in a form of curve. From the curve you can examine the data trend and history of the last minutes. Graphical display shows firstly the curve of the uppermost quantity shown in a basic display. 1. 2. In basic display, press Graphic or (alternatively open the MENU, select Display, select Graphic history Graphical display opens.
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Chapter 6 __________________________________________________________________Settings CHAPTER 6 SETTINGS Pressure Setting When measuring in pressurized environments, the actual process pressure value must be given to the HM70. The pressure can be given in the following units: hPa: Absolute pressure given in the unit of hPa. barg: Gauge pressure given in the unit of bar. Indicates the pressure difference between normal atmospheric pressure and the actual process pressure.
User's Guide ______________________________________________________________________ Display Settings → Quantities and Units All the quantities and units are shown in page 9. 1. Open the MENU; press 2. Select Display, press OPEN. . 3. Select Quantities and units, press 4. To select a quantity, move on the quantity you want by using the arrow buttons, press SELECT. 5. To change the unit, move on the quantity you want by using the arrow buttons, then press UNIT . 6.
Chapter 6 __________________________________________________________________Settings Hold/Save Display Hold/Save function enables you to freeze a certain display reading. This reading can be saved into the memory. 1. Open MENU: press OPEN. 2. Select Display, press 3. Select Hold/Save display. 4. Press HOLD to freeze the display. The frozen measurement data is displayed. 5. Press SAVE to save the reading and menu. CANCEL to return to the 6. You can save several readings with HOLD-SAVE function.
User's Guide ______________________________________________________________________ 5. To get the curve of the other selected quantities, press NEXT. To get the curves of the all quantities, press NEXT until text ALL is shown instead of NEXT. Then press ALL. 6. To zoom in the curve, press the arrow button . To zoom out, press the button . To move the curve in horizontal directions, press the buttons . 7. Press BACK and EXIT to return to the basic display.
Chapter 6 __________________________________________________________________Settings Automatic Power OFF As shipped from factory, HM70 has a default setting which turns the power off automatically after 15 minutes of inactivity. This is to conserve the battery. In case you want to change the inactivity time setting to 60 minutes or turn off the automatic power off function, follow the instructions. 1. Open the MENU: press OPEN. 2. Select Settings, press 3. Select User interface, press . 4.
User's Guide ______________________________________________________________________ Button Click and Backlight on Button Press 1. Open the MENU: press 2. Select Settings, press 3. Select User interface, press 4. To turn OFF or ON sound effect while pressing the buttons, select Key Click and press ON/OFF. 5. OPEN. . . To turn OFF and ON backlight while pressing the buttons, select ON/OFF. Backlight on key press 6. Press EXIT to return to the basic display.
Chapter 6 __________________________________________________________________Settings Device Information → The basic information about the indicator and the probe is found as follows: 1. Open the MENU: press OPEN 2. Select Settings, press 3. Select Device information, press 4. The first display gives the information on the MI70 indicator. Press MORE to get the information on the probe. Press OK and EXIT to return to the basic display. . SHOW.
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Chapter 7 ____________________________________________________________Recording Data CHAPTER 7 RECORDING DATA Recording → You can record measurement data and view the recorded data on the display. Record, (alternatively open the MENU, select 1. Press the shortcut Recording/Viewing). 2. Select Record data, press 3. To change interval, select Interval, press 4. Select the measurement interval with arrow buttons. Measurement intervals and the maximum recording times are shown in the table below.
User's Guide ______________________________________________________________________ 5. Press SELECT. 6. To set the recording duration, select Duration, press SET. 7. Select the recording duration (1 min, 5 min, 15 min, 30 min, 1 h, 3 h, 12 h, 24 h, 7 d, 30 d, memory full) with arrow buttons and press SELECT. 8. Start recording: select Start/Stop recording, press START. If you chose 'Memory full', you see the maximum recording time on the display.
Chapter 7 ____________________________________________________________Recording Data 4. Select the file you want to view, press . The files are identified according to the starting date and time of recording. 5. Press GRAPH to get the graphical view, press TIMES to get the recording timestamps (press VALUES to go back the recorded values). 6. Press EXIT to return to the basic display. Checking Memory Status You can check how much there is free space in the memory. 1. Open the MENU: press OPEN .
User's Guide ______________________________________________________________________ MI70 Link Program for Transferring Recorded Data to PC The recorded data can be transferred to a PC by using MI70 Link program. MI70 Link program can be ordered from Vaisala, see the list of accessories on page 77. You can examine the recorded data easily in Windows® environment and transfer it further to a spreadsheet program (such as Microsoft® Excel) to be modified.
Chapter 8 ___________________________________________________________ Other Functions CHAPTER 8 OTHER FUNCTIONS Setting Alarm Levels → HM70 is alarming by beeping and blinking the backlight. The alarm turns on when the measured value is not between the alarm limits (permissible area). Alarm level(s) can be set for only one quantity at a time. Set the alarm levels as follows: 1. Open the MENU: press OPEN. 2. Select Functions, press 3. Select Alarm, press 4. Select Quantity and press 5.
User's Guide ______________________________________________________________________ 8. NOTE RH and the lower limit so low that it never will be reached (for example 0 % RH). Thus, the HM70 will alert when RH rises above 50 % RH. Select Alarm ON/OFF, press ON to activate the alarm and return back to the basic display. 9. A note picture sign appears on the upper left corner. 10. When the alarm level is reached, you can stop alarming by pressing OK. To reactivate the alarm function, answer YES.
Chapter 8 ___________________________________________________________ Other Functions 1. Open the MENU: press OPEN. 2. Select Functions, press 3. Select Chemical Purge, press 4. Confirm the starting by pressing YES. Chemical purge takes up to 6 minutes. During that time there are no readings on a display. A message display appears once in 15 seconds and it tells you the time required to complete the chemical purge. The chemical purge symbol is shown on upper left corner. 5.
User's Guide ______________________________________________________________________ Sensor Preheat (Optional) Sensor preheat is an optional feature of the HM70 series humidity probes (B-version probes). In some measurement applications, unwanted dew formation makes humidity measurement difficult or even impossible. High humidity combined with rapidly changing outdoor temperature can condense the water vapour in the air onto the sensor.
Chapter 8 ___________________________________________________________ Other Functions Turning Sensor Preheat ON/OFF The following applies only with humidity probes HMP75B, HMP76B and HMP77B: 1. Open the MENU: press OPEN. 2. Select Functions, press 3. Select Sensor Preheat, press pressing YES. 4. Insert the probe to the process. 5. When sensor preheat is done, a display message tells that operation is completed and the basic display with readings returns. . START.
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Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters CHAPTER 9 CALIBRATION AND ADJUSTMENT OF TRANSMITTERS HM70 in Checking and Adjusting The following transmitters can be calibrated by using HM70: HMDW 60/70, HMW 61/71, HMD/W 20/30, HMP130, HMP230/240 series, HMT320/330 series, HMM210 series and DMW19 transmitter. When calibrating in the field, check and adjust a fixed transmitter's reading against a calibrated reference probe on the HM70.
User's Guide ______________________________________________________________________ Connector ports Figure 7 Connectors for connection cables Calibration and Adjustment of HMD/W 60/70, HMD/W 20/30 and HMP130 Series Transmitters For checking and adjusting HM60/70 series and HM20/30/130 series transmitters you need a MI70 and a HMP70 calibrated reference probe and a connection cable. Only relative humidity channel of these transmitters can be checked. 1.
Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters − − − − Select Settings, press Select Measurement settings, press Select RH scale: 4...20 mA or 0...20 mA, press ON To return to the basic display, press EXIT 5. Now the reading of the transmitter is shown on the first or middle row of the display, depending on the connector port to which the calibration cable is connected.
User's Guide ______________________________________________________________________ Calibration and Adjustment of HMT100 Series Transmitters You can check and adjust the HMT100 relative humidity measurement with Vaisala HM70 Hand-Held Humidity and Temperature meter. A HM70-connection cable is needed, Vaisala order code: 211339.
Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters more). If you are near the probes, do not breath in their direction. 9. Press ADJUST to continue adjusting. 10. Choose To same as RHI/II from the MI70 adjustment menu, press SELECT (MI70 automatically recognizes which port the HMP70series probe is connected to). 11. Confirm the adjustment by pressing YES. 12. The adjustment is done. Press BACK and EXIT to return to the basic display. 13.
User's Guide ______________________________________________________________________ Two-Point Adjustment Using a Calibrator Note that the difference between the two reference humidities must be at least 50 %. MI70 indicator is used now only as a terminal for visualizing and setting the transmitter's RH reading. Follow steps 1 to 7 on page 42 and continue as follows: 8. Remove the filter from the transmitter's probe and insert the probe into the lower humidity reference condition. 9.
Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters LiCl-NaCl Adjustment This adjustment is done using relative humidity references 11.3 % RH (LiCl) and 75.5 % RH (NaCl). Follow steps 1 to 7 on page 42 and continue as follows: 8. Remove the filter from the transmitter's probe and insert the probe into the LiCl salt chamber. 9. Press ADJUST to continue adjusting. 10. Choose LiCl-NaCl autom. from the MI70 adjustment menu, press SELECT.
User's Guide ______________________________________________________________________ HMP240 transmitter with a probe heating: The heating function is turned off automatically when the connection has been established in step 10. HMM210 module with chemical purge function (re-gain) or with probe heating option: Before calibration activate the regain function by resetting the device. Let stabilize to the ambient conditions.
Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters The first row shows the reading of the probe/transmitter connected to the port I, the second row shows the reading of the probe/transmitter connected to the port II. The third row RH/T is the difference between the readings of the ports. By pressing BACK you return to the selection display.
User's Guide ______________________________________________________________________ ADJUST 14. Press 15. Select 1-point adjustment. press 16. Wait until the reading is stabilized (takes about 30 minutes). You can follow the stabilization from the GRAPH display. 17. Press READY when the value is stabilized in the reference humidity. 18. Enter the correct humidity value by using the arrow buttons. Press OK. 19. Confirm by pressing 20.
Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters 23. Confirm by pressing 24. Press BACK, EXIT, YES EXIT to return to the basic display. Calibration and Adjustment of HMT320 Series Transmitters You can check and adjust both humidity and temperature channels. Make the temperature adjustment first in case you adjust both channels.
User's Guide ______________________________________________________________________ Field Checking and Adjustment by Using a Calibrated Reference Probe Follow the steps from 1 to 8 and continue as follows: 9. Check that the probes are located in equal conditions and wait until the readings are stabilized (can take 30 minutes or more). If you are near the probes, do not breathe in their direction. 10. Press ADJUST to continue adjusting. 11. Press To same asRHIi/I., press SELECT.
Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters 13. Enter correct reference value by using the arrow buttons. Press OK. 14. Confirm by pressing 15. Adjustment is done. Press basic display. 16. Replace the jumper to CAL.RH pins. 17. Switch off HM70 and detach the calibration cable from MI70 and from the transmitter. YES.
User's Guide ______________________________________________________________________ the difference between two references is less than 50 %, adjustment can not be done. 18. Adjustment is done. Press BACK to exit the adjustment mode press EXIT to return to the basic display. 19. Replace the jumper to CAL.RH pins. 20. Switch off MI70 and detach the calibration cable from the MI70 and from the transmitter.
Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters From now on the adjustment is carried out by using the MI70 indicator. OK to start adjustment. 7. Press 8. Select RH or T, press 9. If RH selected, check the environment settings, if needed. Otherwise press NO. SELECT. Field Checking and Adjustment by Using a Calibrated Reference Probe Follow the steps from 1 to 8 on page 52 and continue as follows: 9.
User's Guide ______________________________________________________________________ 9. Remove the filter from the transmitter's probe and insert the probe into the reference condition. 10. Press 11. Select 1-point adjustment, press 12. Press READY when the reading is stabilized in the reference condition (takes about 30 minutes or more). You can follow the stabilization from the GRAPH display. 13. Enter correct reference value by using the arrow buttons. Press OK. 14. Confirm by pressing 15.
Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters 16. Give the higher reference humidity value by using the arrow buttons. Press OK. 17. Confirm the adjustment, press YES (by pressing NO you return to adjustment mode display and no changes are made). If the difference between two references is less than 50 %, adjustment can not be done. 18. Adjustment is done. Press BACK to exit the adjustment mode press EXIT to return to the basic display.
User's Guide ______________________________________________________________________ Field Checking of DMW19 Transmitter You are able to use MI70 as a display and check your DMW19 transmitter against a calibrated reference probe of HM70. 1. Turn on the DMW19. 2. Remove the lid of the DMW19 transmitter. 3. Connect the 211917ZZ- cable to the 6-pins test connector (cable connector position: Vaisala-logo on top) of the DMW19. 4.
Chapter 10 ___________________________________ Measuring Other Parameters Simultaneously CHAPTER 10 MEASURING OTHER PARAMETERS SIMULTANEOUSLY The MI70 indicator is a generic indicator that can be used with Vaisala interchangeable dewpoint (DMP) and carbon dioxide (GMP) probes. Two different probes can be used simultaneously. 1. Turn off the device. 2. Connect the DMP70/GMP70 probe to the other connector port in the bottom of the indicator. 3. Turn on the device. 4.
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Chapter 11 __________________________________________________ Analog Output Connection CHAPTER 11 ANALOG OUTPUT CONNECTION Selecting and Scaling the Analog Output → → → To get analog measurement data, you need the analog output signal cable, see list of accessories on page 77. One voltage signal channel 0...1.0V can be scaled for the selected quantity. 1. Connect the analog output signal cable connector to the indicator base connector.
User's Guide ______________________________________________________________________ 5. Select Quantity and press SET to choose a quantity. 6. Select Quantity, press SELECT. (One quantity can be chosen at a time. Only active quantities can be selected. To change the quantities, go to MENU Display Quantities and units). 7. Select 0.0 V to set the value for the 0.0V output signal, press SET. (If the analog output is ON, take it OFF) Set the low value by using arrow buttons.
Chapter 12 ______________________________ Calibration and Adjustment of HM70 Series Probes CHAPTER 12 CALIBRATION AND ADJUSTMENT OF HM70 SERIES PROBES General Information about Calibrations The HM70 is fully calibrated as shipped from factory. Adjustment shall be done if there is a reason to believe that device is not within the accuracy specifications. However, if HM70 is used as a reference instrument in humidity measurements, the humidity recalibration is recommended every year.
User's Guide ______________________________________________________________________ stored into the memory of the HM70. Make the adjustment as instructed in the following section 2-Point Adjustment (select LiCl--NaCl autom. on item 9 and follow the display instructions). 2-Point Adjustment Low humidity references 0 % (Nitrogen)/ 11.3 % (LiCl) and higher humidity references 75 % (NaCl)/ 97 % (K2SO4) are recommended for two-point adjustment.
Chapter 12 ______________________________ Calibration and Adjustment of HM70 Series Probes 11. Give the lower reference humidity value by using the arrow buttons. Press OK. 12. Set the probe to the higher reference humidity. Press READY when the reading is stabilized. You can follow the stabilization from the GRAPH display. 13. Give the higher reference relative humidity value by using the arrow buttons. Press OK. 14.
User's Guide ______________________________________________________________________ 1. Take out the screw covering the calibration button (in the probe handle). 2. Press the calibration button. For pressing, use tool with thin and sharp point, such as small screwdriver. When pressing the button, indicator turns to adjusting mode. 3. Select T, press 4. Now the adjustment mode is on, press ADJUST to select the adjustment method: 1-point adjustment or 2-point adjustment. SELECT.
Chapter 12 ______________________________ Calibration and Adjustment of HM70 Series Probes 2-Point Adjustment Follow the steps from 1 to 4 and continue as follows: 5. Select 2-point adjustment. Press SELECT to continue. 6. Set the probe to a lower reference temperature. You can follow the stabilization from the GRAPH display. 7. Press READY when the reading is stabilized. Give the lower reference temperature by using the arrow buttons. Press OK. 8. Set the probe to the higher reference temperature.
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Chapter 13 _____________________________________________________________ Maintenance CHAPTER 13 MAINTENANCE Changing the Filter 1. Remove the dirty filter from the probe; see Figure 2 on page 11. Do not try to clean the filter. Avoid touching the sensor. 2. Install the new filter. Changing the Battery Pack A new rechargeable battery pack can be ordered from Vaisala. Change the battery pack as follows, and refer to Figure 9 on page 68: 1.
User's Guide ______________________________________________________________________ Black connector Connector position: White wires below. Metal contact WHT Figure 9 A (2 Installing the battery pack Error Messages If the HM70 displays an error message, check first that the sensor is connected properly. If there is condensed water in the probe, let the probe dry before resuming measurement. In case of constant error, please contact Vaisala Service Centers (see page 68).
Chapter 13 _____________________________________________________________ Maintenance Technical Support For technical questions, contact the Vaisala technical support: E-mail helpdesk@vaisala.com Fax +358 9 8949 2790 Return Instructions If the product needs repair, please follow the instructions below to speed up the process and to avoid extra costs to you. 1. Read the section Warranty on page 7. 2. Contact a Vaisala Service Center or a local Vaisala representative.
User's Guide ______________________________________________________________________ Vaisala Service Centers Vaisala Service Centers perform calibrations and adjustments as well as repair and spare part services. See contact information below. Vaisala Service Centers also offer accredited calibrations, maintenance contracts, and a calibration reminder program. Do not hesitate to contact them to get further information.
Chapter 14 ____________________________________________________ Technical Specifications CHAPTER 14 TECHNICAL SPECIFICATIONS Probes HMP75, HMP76 and HMP77 Measured Variables Relative Humidity Measurement range 0 ... 100%RH Accuracy (including non-linearity, hysteresis and repeatability) at +15...+25 ºC 1 % RH (0 ... 90 % RH) 1.7 % RH (90 ... 100 % RH) at -20...+40 ºC (1.0 + 0.008 x reading) % RH at -40 ... -20 ºC, +40 ... +180 ºC (1.5 + 0.
User's Guide ______________________________________________________________________ Response time (90 %) at 20 ºC in 0.1 m/s air flow 17 s with grid filter 50 s with grid + steel netting filter 60 s with sintered filter Temperature Measurement ranges HMP75 HMP76 -20 ... +60 ºC -50 ... +120 ºC (to +180 ºC temporarily) -70 ... +180 ºC ±0.2 °C HMP77 Accuracy at +20°C ∆ °C 0.7 0.6 0.5 0.4 0.3 0.2 0.1 °C 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.
Chapter 14 ____________________________________________________ Technical Specifications Wet bulb temperature Enthalpy Water vapor pressure 0 ... +100 ºC, 32 ... +212 ºF 0 ... 160 kJ/g 0 ... 1000 hPa Accuracies of Calculated Variables Accuracies of the calculated variables depend on the calibration accuracy of the humidity and temperature sensors; here the accuracies are given for ±2 %RH and ±0.2 °C. Accuracy of Dewpoint Temperature °C Temp.
User's Guide ______________________________________________________________________ Accuracy of Wet Bulb Temperature °C Temp. -40 -20 0 20 40 60 80 100 120 140 160 Relative humidity 10 20 30 0.20 0.20 0.20 0.21 0.21 0.22 0.27 0.28 0.28 0.45 0.45 0.45 0.84 0.77 0.72 1.45 1.20 1.03 2.23 1.64 1.32 3.06 2.04 1.58 3.85 2.40 1.81 4.57 2.73 2.03 5.25 3.06 2.25 40 0.20 0.22 0.29 0.44 0.67 0.91 1.13 1.31 1.48 1.65 1.82 50 0.20 0.22 0.29 0.44 0.64 0.83 0.99 1.14 1.28 1.41 1.55 60 0.20 0.22 0.29 0.44 0.61 0.76 0.
Chapter 14 ____________________________________________________ Technical Specifications Housing material ABS/ PC blend Probe material Stainless steel (AIS316L) Probe cable length (between indicator and the probe handle) 1.9 m Probe cable length of HMP77 (from handle to the root of the probe) 5.0 m Probe diameter 12 mm (0.47 inch) Weight HMP75 250 g HMP76 350 g HMP77 500 g MI70 Indicator Indicator General Operating temperature range Operating humidity -10 ... + 40 °C 0 ...
User's Guide ______________________________________________________________________ Alarm Audible alarm function Housing classification Weight Housing material IP54 400 g ABS/PC-blend Battery Pack Operation times in continuous use data logging use Power consumption during charge Charging time 48 h typical at +20 °C at least 30 days 10W max 4 hours General about Vaisala Hand-Held Humidity and Temperature Meter HM70 Storage temperature Storage humidity range -40 ... +70 °C 0 ...
Chapter 14 ____________________________________________________ Technical Specifications Accessories Description AC-Adapters Euro AC-adapter UK AC-adapter US AC-adapter AUS AC-adapter Connection cables Analog output signal cable Connection cable for HM60/70/140 series Connection cable for HM20/30/130 series Connection cable for HMDM200 series Connection cable for HM320/330-series Connection cables for DMW19 Carrying cases Carrying case for one probe (HMP75 or HMP77) Carrying case for two probes (HMP75 and
User's Guide ______________________________________________________________________ Ø 12 (0.47) 20 5 (8.0 7 ) 118 (4.
328 (12. 91) Chapter 14 ____________________________________________________ Technical Specifications Ø 12 (0.47) HMP77 Probe M9×1 ø 12 (0.47) HMP76 Probe 37.5 (1.48) 79.5 (3.13) 99.5 (3.92) HMP77 Probe ntionally left blank.
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