Vaisala HMD70, HMD60 Technical data
www.vaisala.com
HMD60/70 Humidity and Temperature
Transmitters for ducts in HVAC applications
Features/Benefits
Full 0 ... 100 %RH measurement
▪
Accuracy up to ±2 %RH
▪
True two-wire transmitters
▪
with 4 ... 20 mA loop powered
output (HMD60)
Selectable signal output of
▪
0 ... 1 V, 0 ... 5 V or 0 ... 10 V
(HMD70) with optional current
module also 0 ... 20 mA
(HMD70)
Vaisala HUMICAP® Sensor
▪
for excellent accuracy and
long-term stability, negligible
hysteresis and resistance to
dust and most chemicals.
Temperature compensated
▪
IP65 (NEMA 4) housing
Vaisala HUMICAP® Humidity and Temperature Transmitters HMD60 and HMD70 are
designed for use in air conditioning applications where accurate and stable control
of relative humidity and temperature are required.
The duct mounted Vaisala HUMICAP®
Humidity and Temperature
Transmitters HMD60 and HMD70
are designed for monitoring relative
humidity and temperature in building
energy management systems.
The combination of high accuracy,
stability and reliable operation, make
these products the ideal choice for
demanding applications.
Resistant to chemicals
and dust
The duct mount HMD60 and HMD70
transmitters can also be used in
many industrial humidity monitoring
applications, where their stability
and resistance to chemicals and dust
are of great value. A useful feature
of these duct mount transmitters is
the ability to remove the electronics
without removing the unit from
the duct.
Measures both humidity
and temperature
The HMD60 and HMD70 transmitters
are available in three models:
U for humidity measurement-only,
Y for humidity and temperature
measurement, and T for temperature
on ly.
Fast, on-site calibration
The accuracy of the transmitters
is simple to check using either
the Vaisala HUMICAP
Humidity and Temperature Meter
HM70 or the Vaisala HUMICAP
Humidity Indicator HMI41. The
calibration can be done in seconds
with a single potentiometer without
disturbing the operation, resulting
in great savings both in maintenance
time and costs.
®
Hand-Held
®
▪
Also available as temperature-
▪
only transmitters
HMD 60T/70T
NIST traceable
▪
(certificate included)
Technical data
-10
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
•C
0-2010203040506070 80 •C
10 4020 605030 8070 %RH
%RH
3
2
1
0
-1
-2
-3
090 100
-20 200
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
8040 60 °C10-10 30 50 70
%RH
-20 °C, + 1,5 %
+80 °C, + 1,3 %
60 series: 2-wire, 4 to 20 mA output
Duct mount RH only HMD60U
RH & T HMD60Y
T only HMD60T
70 series: 3-wire, variable voltage output
Duct mount RH only HMD70U
RH & T HMD70Y
T only HMD70T
Relative humidity
Measurement range
duct mount 0 ... 100 %RH*
Accuracy at +20 °C
Temperature dependence
Response time at +20 °C (+68 °F),
90% response 15 s (with membrane filter)
Stability
Sensor HUMICAP
+ 2 %RH / 2 years
®
180
Temperature (Y and T models)
Linearity better than 0.1 °C
Sensor Pt 1000 IEC 751 class B
Measurement range -20 ... +80 °C (-4 ... 176 °F) **
Accuracy
General - 60 series
Supply voltage 10 ... 35 VDC (RL = 0 ohm)
20 ... 35 VDC (RL = 500 ohm)
Output signal 4 ... 20 mA
General - 70 series
Supply voltage range depends on the selected output signal
DC AC
0 ... 1V 10 ... 35 V 9 ... 24 V
0 ... 5 V 14 ... 35 V 12 ... 24 V
0 ... 10 V 19 ... 35 V 16 ... 24 V
WITH OPTIONAL CURRENT MODULE
0 ... 20 mA (RL = 0 ohm) 10 ... 35 V 11 ... 24 V
**0 ... 20 mA (RL = 500 ohm) 20 ... 35 V 17 ... 24 V
Power consumption @ 24 VAC
HMD70U 10 mA typical
HMD70Y 12 mA typical
General
Operating temperature range
electronics -5 ... +55 °C (+23 ... +131 °F)
probe -20 ... +80 °C (-4 ... +176 °F)
Storage temperature range -40 ... +80 °C (-40 ... +176 °F)
Maximum flow speed 50 m/s
Current module part no. 18945 HM
Housing
probe stainless steel
electronics cast aluminum
Connections screw terminals 0.5 ... 1.5 mm
Sensor protection
standard membrane filter (part no. DRW010525)
optional stainless steel sintered filter (part no. HM46670SP)
Cable thread-through
bushing for 7 ... 10 mm (PG9)
cable housing IP65 (NEMA 4) part no. 18941HM
armoured cable glands part no. 10528HM
(must be ordered separately)
2
** Optional temperature scales are available on request.
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
Complies with EMC standard EN61326 and EN55022
Ref. B210839EN-A ©Vaisala 2009
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
Loading...