Vaisala Humicap HM40 User manual

User’s Guide
www.vaisala.com
M211088EN-A
Vaisala HUMICAP®Hand-Held
Humidity and Temperature Meter
HM40

User’s Guide ________________________________________________ HM40
1
Table of Contents
First Startup....................................................................................3
Initial Settings ............................................................................3
Product Overview ........................................................................4
The HM40 Meter - Front ............................................................ 5
The HM40 Meter – Back.............................................................6
Batteries........................................................................................... 7
Charging...........................................................................................8
Quantities Explained ...................................................................9
Measurement Views................................................................... 10
Screen Layout and Controls............................................... 10
Indicators.....................................................................................11
Numeric View............................................................................12
Statistics View ..........................................................................13
Graph View ............................................................................... 14
Hold and Tag.............................................................................16
Main Menu ......................................................................................18
Tagged Points...........................................................................19
Graph Duration....................................................................... 20
Settings ..................................................................................... 20
Calibration..................................................................................21
Help...............................................................................................21
Settings Submenu ......................................................................22
Language...................................................................................22
Units.............................................................................................23
Time & Date ..............................................................................23
Pressure......................................................................................25

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Backlight....................................................................................25
Battery........................................................................................26
Navigation.................................................................................26
Factory Settings......................................................................26
How to Measure ..........................................................................27
Maintenance .................................................................................29
Cleaning .....................................................................................29
Changing the Filter ............................................................... 30
Changing the Probe................................................................31
Calibration.....................................................................................33
Calibrating the HM40 Using the HMK15 Humidity
Calibrator.................................................................................. 34
Accessories and Parts...............................................................38
HMP110 Probe...........................................................................38
Filters ..........................................................................................39
Chargers and Batteries.........................................................39
Belt Clips and Battery Covers............................................39
Technical Data ............................................................................ 40
Performance............................................................................40
Mechanical................................................................................. 41
General ....................................................................................... 41
Dimensions (in mm).............................................................. 42

User’s Guide ________________________________________________ HM40
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First Startup
1. Check that the HMP110 probe is securely attached
and remove the yellow transport protection cap from
the probe.
2. Open the battery cover and insert two AA-size
batteries.
3. Close the battery cover and turn on the meter by
pressing the Power button. If the meter does not turn
on, check the battery orientation. Replace the
batteries with fresh/recharged ones if needed.
Initial Settings
When you power on the HM40 for the first time (or
after a factory reset of the settings), you must first
select the operation language. You will then be asked if
you want to change the following settings:
-Units
-Date
-Time
If you answer Yes to the question (recommended), the
meter will show the settings screens before showing
the measurement view. Use the arrow and function
buttons to select. For more information, see section
Settings Submenu on page 22.
HM40 will retain the date and time even during
battery changes. The clock will have to be set
again only if the meter is without battery power
for several hours.

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Product Overview
The Vaisala HUMICAP®Hand-Held Humidity and
Temperature Meter HM40 is a hand-held meter for
various portable measurement applications.
Main features:
-Compact and robust housing
-Measures a wide range of quantities: RH, Td, Tw, a, x,
h, T. See section Quantities Explained on page 9.
-Large graphical display
-Graphs for selected quantity and temperature
-Interchangeable HMP110 probe
-Can be user calibrated (using the HMK15 humidity
calibrator, for example)
-Powered by standard AA size batteries (2×)
-Operation temperature range -10°C ... +60°C
-Belt clip
Optional:
-USB-powered portable charger for AA-size NiMH
rechargeables
-Membrane filter for HMP110 probe for increased
protection against contaminants
For more information and order codes of the
accessories, see section Accessories and Parts
on page 38.

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The HM40 Meter - Front
HMP110 probe
Filter and sensor
Probe holder
Display
Right function
L
eft function
Down
Up
Power
Menu

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The HM40 Meter – Back
Belt clip
Battery
cover
Batteries
2 x AA

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Batteries
The HM40 is powered by two AA-size batteries. You
can use the following battery types:
-Alkaline (IEC-LR6)
-Lithium (IEC-FR6)
-NiMH (IEC-HR6)
Do not mix batteries of different types. Both
batteries must be of the same type.
Observe instructions storage and operation
instructions of the battery manufacturer.
Alkaline batteries are the standard choice in non-
rechargeable batteries. They are a good match for the
power requirements of the HM40.
Lithium batteries are a good choice if you need the
longest battery life or best capacity in low
temperatures. Lithium batteries are not rechargeable.
Do not confuse them with lithium-ion batteries, which
cannot be used in the HM40.
NiMH batteries are rechargeable, and available from
Vaisala as an option. For order codes, see section
Accessories and Parts on page 38. Instructions for using
the optional USB charger are provided in section
Charging on page 8.

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Charging
The optional USB charger provides a convenient way to
charge two NiMH batteries from any powered USB port
(for example, from a laptop computer).
1. Place the rechargeable batteries in the charger and
plug it into a USB port. The blue LED on top of the
charger starts to blink.
2. When the LED stops blinking and stays on, the
batteries are charged. The charging time is several
hours for two fully discharged NiMH batteries.
If you are not using a Vaisala-supplied charger and
rechargeable batteries, read and follow the
manufacturer’s own charging instructions.
Figure 1 USB Charger with Two NiMH Batteries
Do not attempt to charge non-rechargeable
(alkaline or lithium) batteries! Doing so leads to a
risk of battery leakage, equipment damage, and
risk of explosion and/or fire.