Vaisala HMD70U Service Manual Page 139

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Technical Data
Operating Range (1 hPa=1mbar)
Pressure ranges 500 ... 1100 hPa
600 ... 1100 hPa
800 ... 1100 hPa
800 ... 1060 hPa
600 ... 1060 hPa
Temperature range -40 ... +60 °C (-40 ... +140 °F)
Humidity range non-condensing
General
Supply voltage 10 ... 30 VDC
Suppply voltage control with TTL level trigger
Supply voltage sensitivity negligible
Current consumption less than 4 mA
in shutdown mode less than 1 µA
Output voltage 0 ... 2.5 VDC
0 ... 5 VDC
Output frequency 500 ... 1100 Hz
Resolution 0.1 hPa
Load resistance minimum 10 kohm
Load capacitance maximum 47 nF
Settling time 1 s to reach full accuracy after power-up
Response time 500 ms to reach full accuracy
after a pressure step
Acceleration sensitivity negligible
Pressure connector M5 (10-32) internal thread
Pressure fitting barbed fitting for 1/8"
Minimum pressure limit 0 hPa abs
Maximum pressure limit 2000 hPa abs
Electrical connector removable connector for
5 wires (AWG 28 ... 16)
Terminals Pin 1: external triggering
Pin 2: signal ground
Pin 3: supply ground
Pin 4: supply voltage
Pin 5: signal output
Housing material, plastic cover ABS/PC blend
Housing classification IP32
Metal mounting plate Al
Weight 90 g
Electromagnetic compatibility Complies with EMC standard
EN 61326-1, Electrical equipment for
measurement, control and laboratory use - EMC
requirements - for use in industrial locations
Accuracy
Linearity* ±0.25 hPa
Hysteresis* ±0.03 hPa
Repeatability* ±0.03 hPa
Calibration uncertainty** ±0.15 hPa
Accuracy at +20 °C*** ±0.3 hPa
* Defined as ±2 standard deviation limits of end-point
non-linearity, hysteresis error or repeatability error.
** Defined as ±2 standard deviation limits of inaccuracy of the
working standard including traceability to NIST.
*** Defined as the root sum of the squares (RSS) of end-point
non-linearity, hysteresis error, repeatability error and
calibration uncertainty at room temperature.
TOTAL ACCURACY AT
+15 ... +25 °C (+59 ... +77 °F) ±0.3 hPa
0 ... +40 °C (+32 ... +104 °F) ±0.6 hPa
-20 ... +45 °C (-4 ... +113 °F) ±1.0 hPa
-40 ... +60 °C (-40 ... +140 °F) ±1.5 hPa
Long-term stability ±0.1 hPa/year
Dimensions
Dimensions in mm (inches)
BAROCAP
®
is a registered trademark of Vaisala.
13.40
0.53
68.40
2.69
90
3.54
4
0.16
76.20
3.00
3.50
0.14
Ø 7.20
0.28
15.82
0.62
97.3
3.83
28.1
1.11
Ref. B210681EN-B ©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.
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
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