Vaisala HUMICAP HM70 User manual

EN
JA
M212070EN-B
Quick Guide
Vaisala HUMICAPâHandheld Humidity and
Temperature Meter
HM70

PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
P.O. Box 26, FI-00421 Helsinki, Finland
[phone]
Visit our Internet pages at www.vaisala.com.
© Vaisala 2021
No part of this document may be
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Translated documents and translated
portions of multilingual documents are
based on the original English versions. In
ambiguous cases, the English versions are
applicable, not the translations.
The contents of this document are subject
to change without prior notice.
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they shall take precedence over the
information contained in this document.
Vaisala makes no representations on this
document’s compliance with the local
rules and regulations applicable at any
given time, and hereby disclaims any and
all responsibilities related thereto.
This document does not create any legally
binding obligations for Vaisala towards
customers or end users. All legally binding
obligations and agreements are included
exclusively in the applicable supply
contract or the General Conditions of Sale
and General Conditions of Service of
Vaisala.
This product contains software developed
by Vaisala or third parties. Use of the
software is governed by license terms and
conditions included in the applicable
supply contract or, in the absence of
separate license terms and conditions, by
the General License Conditions of Vaisala
Group.

Table of contents by language
English.............................................................................................................................................5
日本語...............................................................................................................23
3

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Table of contents
1 Introduction to HM70....................................................................................6
1.1 Overview of probes...........................................................................................7
1.2 Eect of temperature dierences in humidity measurements................... 8
2 MI70 indicator.................................................................................................. 9
2.1 MI70 indicator parts..........................................................................................9
2.2 MI70 status icons.............................................................................................10
2.3 Installing and recharging MI70 batteries......................................................10
3 Taking measurements.................................................................................. 12
3.1 MI70 first start-up settings.............................................................................12
3.2 Basic measuring steps with HM70.................................................................12
3.2.1 Setting actual pressure value and unit.................................................. 13
3.3 Measuring multiple parameters simultaneously......................................... 14
4 Displays and menus...................................................................................... 15
4.1 Basic display.....................................................................................................15
4.2 Graphical display............................................................................................. 15
4.3 Main menu........................................................................................................ 16
5 Maintenance.....................................................................................................18
5.1 Changing the filter...........................................................................................18
5.2 Error messages................................................................................................ 18
5.3 Changing the rechargeable battery pack.....................................................18
Maintenance and calibration services........................................................ 20
Technical support............................................................................................20
Warranty............................................................................................................20
Recycling...........................................................................................................20
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ENGLISH

1 Introduction to HM70
Vaisala HUMICAPâ Handheld Humidity and Temperature Meter HM70 measures relative
humidity and temperature accurately in measurement range −70 … +180 °C (−94 … +356 °F),
depending on the probe model. HM70 consists of 2 main units: Vaisala Handheld Measurement
Indicator MI70 and the HMP75/HMP76/HMP77 probe.
HM70 can be used to measure the following parameters:
Table 1 Display parameters
Parameter Abbreviation Metric unit Non-metric unit
Relative humidity RH %RH %RH
Temperature T °C °F
Dew point/frost point temperature 1) Td/f°C °F
Dew point temperature 2) Td°C °F
Absolute humidity a g/m3gr/ft3
Mixing ratio x g/kg gr/lb
Wet bulb temperature Tw°C °F
Humid air volume/dry air volume H2O ppm ppm
Water vapor pressure pw hPa lb/in2
Saturation water vapor pressure pws hPa lb/in2
Enthalpy h kJ/kg Btu/lb
Water activity awaw aw
1) Td/fshows dew point temperature above the freezing point (0 °C/32 °F) and frost point
temperature Tf(dew point over ice) below the freezing point.
2) Tdshows dew point over water throughout the entire measurement range.
This Quick Guide introduces the features of the MI70 indicator and the basic measurement
procedure with the HM70 meter.
The HM70 User Guide (M210297EN) at www.vaisala.com/hm70 contains product specifications
and instructions for operating and maintaining HM70, and using it together with the following
Vaisala instruments: HMT120, HMT140, HMT330, PTU300, HMT310, and HMP155.
Using HM70 with other Vaisala instruments is discussed in the respective User Guides, also
available at www.vaisala.com:
•HMP60 and HMP110 Series User Guide (M211060EN)
•HMDW110 Series User Guide (M211726EN)
•HMW90 Series User Guide (M211399EN)
M212070EN-B
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•HMD62 and TMD62 User Guide (M212016EN)
•HMD65 User Guide (M212243EN)
•GMW90 Series User Guide (M211659EN)
1.1 Overview of probes
2
1
Figure 1 HMP75, HMP76, and HMP77 probes (left to right)
1Probe filter
2Calibration mode activation button under the screw in the probe handle
Table 2 HMP75, HMP76, and HMP77 probe features
Probe model Overview
HMP75 Basic probe for relative humidity and temperature measurement. Preheat and
chemical purge options available with model HMP75B.
HMP76 Rugged probe with a long stainless steel shaft. Preheat and chemical purge
options available with model HMP76B.
HMP77 Cable probe for industrial processes up to +180 °C (+356 °F). Preheat and
chemical purge options available with model HMP77B.
Chapter – Introduction to HM70
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ENGLISH

1.2 Eect of temperature dierences in humidity
measurements
In humidity measurement and especially in calibration, it is essential that the temperature of
the probe and the measurement environment are the same. Even a small temperature
dierence between the environment and the probe causes an error.
A temperature dierence of a few degrees can also cause water to condense on the sensor
surface. The HUMICAPâ 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.
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2 MI70 indicator
Vaisala MI70 handheld indicator is a portable tool for viewing the measurements, recording the
data, and configuring the settings of connected Vaisala instruments. MI70 indicators can be
used with a wide range of Vaisala instruments, and are also delivered as part of the probe and
indicator product packages DM70, GM70, HM70, and MM70.
2.1 MI70 indicator parts
6
5
4
3
2
1
Figure 2 MI70 indicator parts
1Charger socket
2Function key shortcut buttons . The
functions change according to what
you are doing with the indicator.
3Arrow buttons:
Move up in a menu
Move down in a menu
Enter a sub-menu
Return to previous menu level
4Power On/O button
5Battery compartment at the back of
the indicator
62 ports (labeled I and II) for
connecting probes and instruments.
To open menus, press an arrow button and then press the shortcut buttons. To activate a
function shown above the shortcut button, press the shortcut button. To navigate in the
menus, press the arrow buttons.
Chapter – MI70 indicator
9
ENGLISH

2.2 MI70 status icons
Icons that inform you about the status of MI70 (for example, battery status and alarm notification)
are shown on the upper left corner of the display. Multiple icons can be shown simultaneously.
Table 3 MI70 status icons
Icon Description
Battery status icon. The icon can show the following info:
•0 ... 8 bars, no animation:
• batteries are in use, a charger is not connected
• if a charger is connected: non-rechargeable batteries installed
• if a charger is connected: waiting for the battery temperature to settle
between 0 ... +40 °C (+32 ... +104 °F)
• if a charger is connected and the icon remains at 8/8 bars: the battery is
full
• Animated battery status icon: battery is charging (or recovering after
emptying out completely). The charging animation is shown also when the
indicator is powered o.
• Battery icon not present: batteries are not installed
The battery can no longer be charged and must be replaced. If the indicator is
powered on, a notification about not being able to charge the battery is shown
on the MI70 screen.
You can order replacement batteries from Vaisala (item code 26755).
Recording icon. Shows that the measurements are being recorded. The bar
shows for how long the recording will continue (a set time limit or until the
memory runs out). The recording icon and bar are shown also when the
indicator is powered o.
Calibration reminder icon. Appears when a calibration reminder has been set
to inform that a user-defined interval has passed and calibration is due.
Analog output icon. Shown when the analog output mode is in use.
PC connection icon. Shown when the indicator is connected to a PC with a
cable.
Alarm icon. Shown when the measurement has reached a user-defined alarm
limit.
2.3 Installing and recharging MI70 batteries
If you are using alkaline batteries, unscrew the back plate of the indicator and insert the
batteries. Do not attempt to recharge standard alkaline batteries.
If you ordered MI70 with a rechargeable battery, it is already in place as shipped from the
factory. The delivered batteries have been pre-charged.
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