Vaisala HM70 Technical data
Vaisala Instruments Catalog 2009
Ref. B210768EN rev. A
P.O. Box 26, FI-00421 Helsinki, FINLAND
Email: industrialsales@vaisala.com
Tel: +358 9 894 91
Fax: +358 9 8949 2485
www.vaisala.com/HM70
HM70 Hand-Held Humidity and Temperature
Meter for Spot-Checking Applications
Features/Benefits
Features/Benefits
• Multilingual user interface
• Multilingual user interface
• Shows measurement trends
• Shows measurement trends
graphically
graphically
• Proven Vaisala HUMICAP® Sensor
• Proven Vaisala HUMICAP® Sensor
technology
technology
• 3 probes, temperature measurement
• 3 probe alternatives, temperature
ranges between -70 and +180 °C
measurement ranges between -70
• Multiprobe operation; dewpoint and
and +180 °C
CO2 probes can also be connected
• Multiprobe operation; dewpoint and
• Displays various humidity
CO2 probes can also be connected
parameters
• 2 probes can be connected
• Sensor preheat and chemical purge
simultaneously
•
options for demanding conditions
Displays various humidity
• Data can be logged, and transferred
parameters
to a PC via MI70 Link software
• Sensor preheat and chemical purge
• Rugged and reliable - even in
options for demanding conditions
extreme conditions
• Data can be logged, and transferred
• NIST traceable (certicate included)
e Vaisala HUMICAP® Hand-Held Humidity and Temperature Meter HM70 is a highperformance, portable humidity reference that is exciting to use.
to a PC via MI70 Link software
• NIST traceable (certicate included)
e Vaisala HUMICAP® Hand-Held
Humidity and Temperature Meter
HM70 is a user-friendly meter for
demanding spot-checking humidity
measurements. It is ideal for eld
checking and calibration of Vaisala's
xed humidity instruments.
Three probes to choose
from
e HMP75 is a general purpose probe
for humidity measurements between
-20 and +60 °C. e HMP76 is a long,
stainless steel probe for humidity
measurements between -50 and
+120 °C. It is especially suitable for
spot-checking in ducts. e HMP77 is
a small probe at the end of a 5-meter
cable. e probe is ideal for dicult-toreach areas and for on-site calibration
of Vaisala's process transmitters. e
measurement range is for temperatures
up to +180 °C.
One or two probes can be connected
simultaneously. In addition, the HM70
supports the use of Vaisala's dewpoint,
carbon dioxide and moisture in oil
probes, allowing measurements in
multiparameter applications.
Easy-to-use user interface
and three-variable display
e HM70 features a multilingual,
menu-based user interface, and a
clear graphical LCD display. Overall
three measurement parameters can be
displayed and logged into the meter's
memory at the same time. An analog
output option is also available.
Proven HUMICAP®
technology
e HM70 incorporates the latest
generation of the Vaisala HUMICAP®
Sensor. Its proven reliable and high
performance humidity measurement
ability is combined with better than
ever long-term stability. Additionally,
a sensor that has been developed to
cope with chemical interference is
available to provide accuracy that lasts
in demanding conditions.
Stable performance in
demanding applications
e chemical purge option maintains
measurement accuracy in environments
with high concentrations of chemicals.
e sensor preheat option reduces
measurement delays by keeping the
sensor dry when the probe is inserted
into hot and humid processes.
Calibration
e meter is calibrated at the factory
against traceable standards, and
delivered with a calibration certicate.
e HM70 is also available with
accredited calibration.
e HM70 probes can be sent to a
Vaisala Service Center for a traceable
recalibration.
MI70 Link
e optional MI70 Link Windows®
software and the USB connection cable
form a practical tool for transferring
logged data and real time measurement
data from the HM70 to a PC.
e graphic display shows the stabilization
of measurements and process trends.
38
39
Vaisala Instruments Catalog 2009
Ref. B210768EN rev. A
°C
°C
0
0-80 -60 -40 -20 20 40 60 80 100 120 140 160
180
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0.1
0.2
0.3
0.4
0.5
0.6
0.7
HM70
Technical Data
HUMIDITY
DEWPOINT
HMP75, HMP76 and HMP77 probes
Measured variables
Relative humidity
Measurement range
0 ... 100 %RH
Accuracy (including nonlinearity, hysteresis and repeatability)
at +15 ... +25 °C (+59 ... +77 °F) ±1 %RH (0 ... 90 %RH)
at -20 ... +40 °C (-4 ... +104 °F) ±(1.0 + 0.008 x reading) %RH
at -40 ... +180 °C (-40 ... +356 °F) ±(1.5 + 0.015 x reading) %RH
Factory calibration uncertainty (+20 °C / +68 °F)
(Dened as ±2 standard deviation limits.)
Response time (90%) at +20 °C (+68 °F) in still air
(with standard plastic grid) 17 s
HMP75
(with standard sintered bronze lter) 60 s
HMP76
(with standard plastic grid and stainless steel netting) 50 s
HMP77
Sensor HUMICAP® 180R
HUMICAP® 180RC (chemical purge, sensor preheat)
Typical long-term stability better than 1 %RH / year
Temperature
Measurement range
HMP75 -20 ... +60 °C (-4 ... +140 °F)
HMP76 -50 ... +120 °C (-58 ... +248 F)
short time -50 ... +180 °C (-58 ... +356 °F)
HMP77 -70 ... +180 °C (-94 ... +356 °F)
Accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F)
Accuracy over temperature range (see graph)
Temperature sensor Pt100 IEC751 1/3 class B
±1.7 %RH (90 ... 100 %RH)
±0.6 %RH (0 ... 40 %RH)
±1.0 %RH (40 ... 97 %RH)
MI70 measurement indicator
Indicator general
Menu languages English, Chinese, French, Spanish,
Display LCD with backlight, graphic trend display of
Max. no of probes 2
Power supply Rechargeable NiMH battery pack with AC-adapter
Analog output 0 ... 1 VDC
Output resolution 0.6 mV
PC interface MI70 Link software with USB or serial port cable
Data logging capacity 2700 points
Alarm audible alarm function
Operating temperature range -10 ... +40 °C (+14 ... +104 °F)
Operating humidity range non-condensing
Housing classication IP54
Weight 400 g
Battery operation time
Continuous use 48 h typical at +20 °C (+68 F)
Data logging use up to a month, depending on logging interval
Electromagnetic compatibility Complies with EMC standard
German, Russian, Japanese, Swedish, Finnish
any parameter, character height up to 16 mm
or 4xAA-size alkalines, type IEC LR6
EN61326-1, Portable Equipment
MI70 indicator + probe = HM70
Accessories
Carrying cases
for MI70 and HMP75/77 probe MI70CASE
for MI70 and HMP75/76 probe MI70CASE2
Transmitter connection cables for
HMP230 Series 27159ZZ
HMT330 & HMT100 Series 211339
HM60/70/140 Series HMA6070
HM20/30/130 Series HMA2030
MI70 Link software with USB cable 219687
MI70 Link software with serial port cable MI70LINK
Analog output cable 27168ZZ
Sensor protection
HMP75
Plastic PC grid (HMP75 standard) 6221
Membrane lter 10159HM
Sintered bronze lter DRW212987SP
HMP76/77
Plastic PPS grid DRW010276SP
Sintered stainless steel lter
Sintered bronze lter (HMP76 standard) DRW212987SP
PPS grid with SS netting (HMP77 standard) DRW010281SP
HM47280SP
Calculated variables (typical ranges)
Dewpoint temperature -20 ... +100 °C (-4 ... +212 °F)
Mixing ratio 0 ... 600 g/kg dry air
Absolute humidity 0 ... 600 g/m
Wet bulb temperature 0 ... 100 °C (+32 ... +212 °F)
Enthalpy 0 ... 160 kJ/g
Water vapor pressure 0 ... 1000 hPa
Dimensions
Dimensions in mm (inches)
3
HMP75
HMP76
HMP77
e accuracies of these calculated variables are limited by the
accuracies of the measured variables on which they are based,
namely RH and T. e RH and T accuracies are stated above under
Measured Variables.
Probe general
Operating temperature range for electronics -40 ... +60 °C
Housing classication IP65 (NEMA 4)
Housing material ABS/PC blend
Probe material Stainless steel (AISI316L)
Cable length between probe and indicator 1.9 m
Weight
HMP75 250 g
HMP76 350 g
HMP77 500 g
(-40 ... +140 °F)
HUMICAP® is a registered trademark of Vaisala.
Specications subject to change without prior notice.
© Vaisala Oyj
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