USER'S GUIDE
Vaisala HUMICAP® Hand-Held
Humidity and Temperature Mete
r
HM70
M210297EN-D
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PUBLISHED BY
Vaisala Oyj Phone (int.): +358 9 8949 1
P.O. Box 26 Fax: +358 9 8949 2227
FIN-00421 Helsinki
Finland
Visit our Internet pages at http://www.vaisala.com/
© Vaisala 2006
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.
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
Sale.
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_________________________________________________________________________________
VAISALA_________________________________________________________________________ 1
Table of Contents
CHAPTER 1
GENERAL INFORMATION ............................................................................ 5
Safety......................................................................................... 5
Recycling .................................................................................. 5
Warranty .................................................................................... 6
CHAPTER 2
PRODUCT DESCRIPTION ............................................................................ 7
Vaisala HUMICAP® Hand-Held Temperature and Humidity
Meter HM70 ...............................................................................
7
Display Parameters .................................................................. 7
CHAPTER 3
PREPARATIONS BEFORE USE ................................................................... 9
Installing and Recharging of Batteries .................................. 9
Turning ON the Device........................................................... 10
CHAPTER 4
TAKING MEASUREMENTS ........................................................................ 11
Beware of Temperature Differences..................................... 12
CHAPTER 5
BUTTONS, DISPLAYS AND MENUS.......................................................... 13
Buttons and Navigation ......................................................... 13
Basic Display .......................................................................... 14
Graphical Display ................................................................... 15
Menus ...................................................................................... 15
CHAPTER 6
SETTINGS .................................................................................................... 17
Pressure Setting..................................................................... 17
Display Settings ..................................................................... 18
Quantities and Units ............................................................ 18
Rounding ............................................................................. 18
Hold/Save Display............................................................... 19
Graphic History.................................................................... 19
User Interface ......................................................................... 20
Selecting Language ............................................................ 20
Automatic Power OFF ......................................................... 21
Changing Shortcut Keys ..................................................... 21
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Button Click and Backlight on Button Press ........................
22
Setting Date and Time......................................................... 22
Device Information .................................................................23
Reverting Factory Settings ..................................................23
CHAPTER 7
RECORDING DATA .....................................................................................25
Recording ................................................................................25
Stopping Recording ...............................................................26
Viewing Recorded Data..........................................................26
Checking Memory Status.......................................................27
Deleting All Recorded Files ...................................................27
MI70 Link Program for Transferring Recorded
Data to PC................................................................................
28
MI70 Link Program for Real-Time PC Monitoring................28
CHAPTER 8
OTHER FUNCTIONS....................................................................................29
Setting Alarm Levels ..............................................................29
Chemical Purge (Optional) ....................................................30
Turning Chemical Purge ON ...............................................30
Sensor Preheat (Optional) .....................................................32
Turning Sensor Preheat ON/OFF........................................33
CHAPTER 9
CALIBRATION AND ADJUSTMENT OF TRANSMITTERS .......................35
HM70 in Checking and Adjusting..........................................35
Calibration Cables ..................................................................35
Calibration and Adjustment of HMD/W 60/70, HMD/W 20/30
and HMP130 Series Transmitters..........................................
36
Calibration and Adjustment of HMT100 Series
Transmitters ............................................................................
37
Field Checking and Adjustment Using a Calibrated
Reference Probe .................................................................
38
One-Point Adjustment Using a Calibrator ...........................39
Two-Point Adjustment Using a Calibrator ...........................39
LiCl-NaCl Adjustment ..........................................................40
Calibration and Adjustment of HMP230/240 Transmitters
and HMM210 Modules ............................................................
41
Field Checking and Adjustment of Humidity by Using a
Calibrated Reference Probe ................................................
43
1-Point Humidity Adjustment by Using a Calibrator ............43
2-Point Adjustment by Using a Calibrator ...........................44
Calibration and Adjustment of HMT320 Series
Transmitters ............................................................................
45
Field Checking and Adjustment by Using a Calibrated
Reference Probe .................................................................
46
1-Point Adjustment by Using a Calibrator ...........................46
2-Point Adjustment by Using a Calibrator ...........................47
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VAISALA_________________________________________________________________________ 3
Calibration and Adjustment of HMT330 Series
Transmitters............................................................................
48
Field Checking and Adjustment by Using a Calibrated
Reference Probe .................................................................
49
1-Point Adjustment by Using a Calibrator ........................... 49
2-Point Adjustment by Using a Calibrator ........................... 50
LiCl-NaCl Adjustment .......................................................... 51
Field Checking of DMW19 Transmitter ................................ 52
CHAPTER 10
MEASURING OTHER PARAMETERS SIMULTANEOUSLY ..................... 53
CHAPTER 11
ANALOG OUTPUT CONNECTION ............................................................. 55
Selecting and Scaling the Analog Output ........................... 55
CHAPTER 12
CALIBRATION AND ADJUSTMENT OF HM70 SERIES PROBES ........... 57
General Information about Calibrations .............................. 57
Relative Humidity Adjustment .............................................. 58
LiCl-NaCl Automatic Adjustment......................................... 58
2-Point Adjustment .............................................................. 58
1-Point Adjustment .............................................................. 59
Temperature Adjustment....................................................... 60
1-Point Adjustment .............................................................. 60
2-Point Adjustment .............................................................. 61
Last Adjustment Date ............................................................61
CHAPTER 13
ERROR MESSAGES.................................................................................... 63
CHAPTER 14
MAINTENANCE ........................................................................................... 65
Changing the Filter................................................................. 65
Changing the Battery Pack.................................................... 65
Vaisala Service Centers......................................................... 66
CHAPTER 15
TECHNICAL SPECIFICATIONS .................................................................. 67
Probes HMP75, HMP76 and HMP77...................................... 67
Measured Variables ............................................................ 67
Relative Humidity ...........................................................67
Temperature................................................................... 68
Calculated Variables ..............................................................68
Typical Ranges.................................................................... 68
Accuracies of Calculated Variables ............................... 69
Accuracy of Dewpoint Temperature °C ......................... 69
Accuracy of Mixing Ratio g/kg........................................ 69
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4 ____________________________________________________________________ M210297EN-D
Accuracy of Wet Bulb Temperature °C ..........................
70
Accuracy of Absolute Humidity g/m³ ..............................70
General ....................................................................................70
MI70 Indicator..........................................................................71
Indicator General .................................................................71
Battery Pack ...................................................................72
General about Vaisala Hand-Held Humidity and
Temperature Meter HM70 ..............................................
72
Electromagnetic Compatibility ........................................72
Accessories............................................................................. 73
Dimensions in mm (inches)................................................... 74
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Chapter 1 _________________________________________________________ General Information
VAISALA_________________________________________________________________________ 5
CHAPTER 1
GENERAL INFORMATION
Safety
Throughout the manual, important safety considerations are
highlighted as follows:
WARNING
Warning alerts you to a potential hazard. If you do not read and
follow instructions very carefully at this point, there is a risk of injury
or even death.
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.
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6 ____________________________________________________________________ M210297EN-D
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. If any Product proves however to
be defective in workmanship or material within the
period herein provided Vaisala undertakes to the
exclusion of any other remedy to repair or at its own
option replace the defective Product or part thereof
free of charge and otherwise on the same conditions
as for the original Product or part without extension
to original warranty time. 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 repair or service
works should appear inadequate or faulty and should
this cause malfunction or nonfunction of the product
to which the service was performed Vaisala shall at
its free option either repair or have repaired or
replace the product in question. The working hours
used by employees of Vaisala for such repair or
replacement shall be free of charge to the client.
This service warranty shall be valid for a period of
six (6) months from the date the service measures
were completed.
This warranty is however subject to following
conditions:
a) A substantiated written claim as to any alleged
defects shall have been received by Vaisala
within thirty (30) days after the defect or fault
became known or occurred, and
b) The allegedly defective Product or part shall,
should Vaisala so require, be sent to the works of
Vaisala or to such other place as Vaisala may
indicate in writing, freight and insurance prepaid
and properly packed and labelled, unless Vaisala
agrees to inspect and repair the Product or
replace it on site.
This warranty does not however apply when the
defect has been caused through
a) normal wear and tear or accident;
b) misuse or other unsuitable or unauthorized use of
the Product or negligence or error in storing,
maintaining or in handling the Product or any
equipment thereof;
c) wrong installation or assembly or failure to
service the Product or otherwise follow Vaisala's
service instructions including any repairs or
installation or assembly or service made by
unauthorized personnel not approved by Vaisala
or replacements with parts not manufactured or
supplied by Vaisala;
d) modifications or changes of the Product as well
as any adding to it without Vaisala's prior
authorization;
e) other factors depending on the Customer or a
third party.
Notwithstanding the aforesaid Vaisala's liability
under this clause shall not apply to any defects
arising out of materials, designs or instructions
provided by the Customer.
This warranty is expressly in lieu of and excludes all
other conditions, warranties and liabilities, express
or implied, whether under law, statute or otherwise,
including without limitation any implied warranties
of merchantability or of fitness for a particular
purpose and all other obligations and liabilities of
Vaisala or its representatives with respect to any
defect or deficiency applicable to or resulting
directly or indirectly from the Products supplied
hereunder, which obligations and liabilities are
hereby expressly cancelled and waived. Vaisala's
liability shall under no circumstances exceed the
invoice price of any Product for which a warranty
claim is made, nor shall Vaisala in any
circumstances be liable for lost profits or other
consequential loss whether direct or indirect or for
special damages.
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Chapter 2 _________________________________________________________ Product Description
VAISALA_________________________________________________________________________ 7
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.
Vaisala HM70 is delivered with a factory calibration certificate.
Display Parameters
- RH relative humidity (% RH)
- T temperature (°C/°F)
- T
d/f
: dewpoint/frostpoint
1)
temperature (°C/°F)
- Td : dewpoint temperature
2)
(°C/°F)
- a : absolute humidity (g/m3/ gr/ft3)
- x : mixing ratio (g/kg / gr/lb)
- T
w
: wetbulb temperature (°C/°F)
- H
2
O: humid air volume/ dry air volume (ppm)
- pw: water vapour pressure (hPa/ lb/in2)
- pws: saturation water vapour pressure(hPa/ lb/in2)
- h : enthalpy (kJ/kg / Btu/lb)
- aw : water activity
1)
T
d/f
shows dewpoint temperature above the freezing point (0°C/32
°F) and frostpoint temperature T
f
(dewpoint over ice) below the
freezing point.
2)
Td shows dewpoint over water throughout the entire measurement
range.
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User's Guide _______________________________________________________________________
8 ____________________________________________________________________ M210297EN-D
1 MI70 indicator
2 Recharger connector
3 Connector ports for
probes and cables
4 Calibration button under
the screw
5 Probe HMP75/76/77
6 Probe filter
1
2
4
HMP75 PROBE
Basic probe for relative humidity
and temperature measurement
Preheat and chemical purge
options available (HMP75B).
HMP76 PROBE
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.
Preheat and chemical purge
options available (HMP77B).
Power ON/OFF
5
6
Port I 3
Port II
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Chapter 3 _____________________________________________________ Preparations Before Use
VAISALA_________________________________________________________________________ 9
CHAPTER 3
PREPARATIONS BEFORE USE
Installing and Recharging of Batteries
1. If you are using alkaline batteries, unscrew the back plate of the
indicator and insert the alkalines. If HM70 is ordered with
rechargeable battery pack, it is already in place as shipped from
the factory.
2. Recharge the battery pack as follows: Plug in recharger connector
to the base of the indicator and connect the recharger to wall
socket. A battery symbol in corner of display starts to roll.
- It is not recommended to use HM70 during the first recharging.
Later on HM70 can be used while recharging.
- Duration of recharging depends on the charge level of the battery
pack being 4 hours typical. The recommended first recharging
time is 6 hours.
3. The battery pack is full when the battery symbol stops rolling.
4. Disconnect the recharger.
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Turning ON the Device
1. Connect the probe to the either of the base connectors of the
indicator.
2. Press button.
3. Select the language by using buttons. Confirm by
pressing SELECT. You can select the language later as well, see
page 20.
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. The default date presentation format is: year-month-
date
. If you want to change the format, see page 22.
5. To change the time, select Time and press SET. Change the
time by using arrow buttons. To confirm the time, press OK.
The default time presentation format is 24-hour clock. If you
want to use 12-hour clock, select 12-hour clock, press ON.
6. Press EXIT. To check and change the pressure setting, select
YES. Otherwise select NO, basic display appears.
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Chapter 4 _______________________________________________________ Taking Measurements
VAISALA________________________________________________________________________ 11
CHAPTER 4
TAKING MEASUREMENTS
See Chapter 3 Preparations Before Use if you are starting the HM70
for the first time, otherwise follow instructions below:
1. Connect the probe to MI70-indicator.
2. Press POWER ON/OFF button.
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 30.
4. In case there is a risk for condensation, use the optional preheat
(HM70 series probe versions B) when installing the probe, see
page 32.
5. Install the probe to the measuring position. If measuring in
pressurized processes, see the instructions on page 17.
6. Before measurements, ensure that the air pressure setting of
HM70 is correct (see page
17).
7. The basic display opens, let the reading stabilize.
CAUTION
If you need to disconnect the probe from the indicator, first press
POWER ON/OFF button to turn the indicator OFF. This ensures that all
settings and data are saved properly.
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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. As the curve below shows, if the
temperature is +20 °C and the relative humidity 100 %RH, a
difference of ±1 °C between the environment and the probe causes an
error of ±6 %RH. When the humidity is 90 %RH, the corresponding
error is ±5.4 %RH.
A temperature difference of a few degrees can also cause water to
condense on the sensor surface. HUMICAP
®
®
sensor starts to function
normally as soon as the water has evaporated. If the condensed water
is contaminated, the life span of the probe may shorten and calibration
may change. See also information about sensor preheat, page 32.
Temperature (°C)
dRH (%RH)
0
1
2
3
4
5
6
7
8
9
10
-40-200 20406080100
Measurement error at 100 %RH when the difference between the
ambient and sensor temperature is 1 °C.
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Chapter 5 __________________________________________________Buttons, Displays and Menus
VAISALA________________________________________________________________________ 13
CHAPTER 5
BUTTONS, DISPLAYS AND MENUS
Buttons and Navigation
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. In the MENUS you can navigate
with ARROW buttons.
Power ON/OFF
Shortcut buttons
Arrow buttons
To open a menu view
1. Press an arrow button
2. Press this shortcut button
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14 ___________________________________________________________________ M210297EN-D
Basic Display
1. Selected quantities. Up to three of the quantities can be selected at
a time.
- RH relative humidity (% RH)
- T temperature (ºC/ ºF)
- T
d/f
: dewpoint/frostpoint1 temperature (ºC/ ºF)
- Td : dewpoint temperature2) (ºC/ ºF)
- a : absolute humidity (g/m3/ gr/ft3)
- x : mixing ratio (g/kg / gr/lb)
- Tw: wetbulb temperature (ºC/ ºF)
- H2O: humid air volume/ dry air volume (ppm)
- pw: water vapour pressure (hPa/ lb/in2)
- pws: saturation water vapour pressure(hPa/ lb/in2)
- h : enthalpy (kJ/kg / Btu/lb)
- aw : water activity
2. Shortcut button Graphic
1
changes display into curve mode
3. Shortcut button Hold/Sa
1
freezes display and you may save the
reading into the memory.
4. Shortcut button Record
1
takes you to the Recording/Viewing menu.
5. State of battery.
6. Pressure setting.
1
Graphic, Hold/Sa and Record -functions above the shortcut buttons are set
in the factory. You can change them to refer other functions (see page
21).
1
2
3
4
5 6
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Chapter 5 __________________________________________________Buttons, Displays and Menus
VAISALA________________________________________________________________________ 15
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. In basic display, press Graphic or (alternatively open the MENU,
select Display, select Graphic history
2. Graphical display opens. More information on page
19 Graphic
history
.
3. Press BACK to return to the basic display.
Menus
In the menus you can change settings and select the functions.
1. Open the main menu by pressing any of the buttons.
2. Press OPEN within 5 seconds. The basic display returns if you
do not open the MENU shortly. If this happens, begin with the item
1 again.
3. Move in the menus by using buttons.
4. Select the item with buttom.
5. Press to return to the earlier level.
6. EXIT returns back to normal operation.
Main menu Display menu
Functions menu
Recording/Viewing menu
Settings menuEnvironment menu
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Chapter 6 ___________________________________________________________________Settings
VAISALA________________________________________________________________________ 17
CHAPTER 6
SETTINGS
Pressure Setting
In pressurized environments, the actual process pressure value shall be
set to 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.
bara: Absolute process pressure given in the unit of bar.
psia: Absolute pressure given in the unit of psi.
Follow the instructions below:
1. Open the MENU; press OPEN
2. Select ENVIRONMENT with and press .
3. Press UNIT to change the pressure unit. Default unit is hPa.
4. Press SET to set the ambient pressure value.
5. Set the pressure value by using buttons. Press +/- to
change the sign of the pressure value. Press OK to save the
value.
6. Press EXIT to return to the basic display.
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Display Settings
→
Quantities and Units
All the quantities and units are shown in page 7.
1. Open the
MENU; press OPEN.
2. Select Display, press .
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. To hide a quantity, move on the quantity you want to hide by using
the arrow buttons, then press HIDE.
7. Press EXIT to return to the basic display.
8. If asked, press YES, if you want to check environment settings,
otherwise press
NO.
Rounding
You can turn on the decimal display by using the Rounding function.
The default setting is rounding off .
1. Open the
MENU: press OPEN
2. Select the Display, press
3. Select Rounding.
4. Press ON to have rounding on. Press OFF to deactivate
rounding (two decimal display).
5. Press EXIT to return to the basic display.
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Chapter 6 ___________________________________________________________________Settings
VAISALA________________________________________________________________________ 19
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 CANCEL to return to the
menu.
6. You can save several readings with HOLD-SAVE function. The data
points are identified on the basis of the saving date and time. All
the individual readings (data points) are stored in a same file
marked with . The file remains in the indicator memory even if
the indicator is switched OFF.
7. To view the saved readings, press Record, select View recorded
data,
press .
8. Select the file marked with , press . Now you can see the
saved data readings. Press TIMES to see the recording
timestamps.
9. Press EXIT to return to the basic display.
Graphic History
Graphic history shows the data curve of the last hour. To see longer
graphs, use the data recording function to save the data and then view
it as a graph.
1. Open the MENU: press OPEN.
2. Select Display, press
3. Select Graphic history, press SHOW to have a graphical history
display.
4. To get the statistical info on the graph area (minimum, maximum
and mean values), press INFO.
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20 ___________________________________________________________________ M210297EN-D
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.
User Interface
→ →
Selecting Language
You can select any of the following languages as an user interface
language: English, German, French, Finnish, Spanish or Swedish.
1. Open the MENU: press OPEN.
2. Select
Settings, press .
3. Select User interface, press .
4. Select Language, press SET.
5. Select the language you want, press SELECT.
6. Press
EXIT to return to the basic display.
If you accidentally select a wrong language, first go back to the basic
display by pressing rightmost key as many times as required, then
go to the language selection menu by pressing: , middle key
, , , middle key.
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Chapter 6 ___________________________________________________________________Settings
VAISALA________________________________________________________________________ 21
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. Select Auto power off, press SET.
5. Select the choice you want, press SELECT.
6. Press EXIT to return to the basic display.
Changing Shortcut Keys
As a default, the three shortcut keys refer to the functions Graphic,
Hold/Save and Record. If needed, a shortcut for the functions can be
changed to correspond to your needs.
1. Open the MENU: press OPEN.
2. Select Settings, press .
3. Select User Interface, press .
4. Select Program shortcut keys, press START.
5. Press the shortcut key you want to change, e.g. Hold/Save.
6. If you want to replace Hold/Save with Chemical purge-function
(as an example), select Chemical Purge by using arrow buttons
( Functions) Chemical Purge, press SELECT. Answer YES to confirm
your selection, otherwise answer NO and continue from item 4.
7. Press EXIT to return to the basic display.
Hold/Save -shortcut key replaced
by Chemical purge -shortcut key
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22 ___________________________________________________________________ M210297EN-D
Button Click and Backlight on
Button Press
1. Open the MENU: press OPEN.
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. To turn OFF and ON backlight while pressing the buttons, select
Backlight on key press ON/OFF.
6. Press EXIT to return to the basic display.
Setting Date and Time
To have correct date and time in recorded data files, set the date and
time according to the following instructions.
1. Open the MENU: press OPEN.
2. Select Setting, press .
3. Select Date and time, press .
4. To change the date, select Date and press SET. Change the date
by using arrow buttons. To confirm the date, press. OK. The
default date presentation format is year-month-date, e.g.2002-
06-05. If you want to change the format, select Date format: Y-M-D,
press SET , select either D.M.Y or M/D/Y, press SELECT .
5. To change the time, select Time and press SET. Change the
time by using arrow buttons. To confirm the time, press OK.
The default time presentation format is 24-hour clock. If you
want to change the format, select 12-hour clock, press ON/OFF.
6. Press EXIT.
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