Vaisala HMD70U Service Manual Page 129

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Technical Data
Performance
BAROMETRIC PRESSURE RANGE 500 ... 1100 hPa
Class A Class B
Linearity* ±0.05 hPa ±0.10 hPa
Hysteresis* ±0.03 hPa ±0.03 hPa
Repeatability* ±0.03 hPa ±0.03 hPa
Calibration uncertainty** ±0.07 hPa ±0.15 hPa
Accuracy at +20 °C (+68 °F) *** ±0.10 hPa ±0.20 hPa
BAROMETRIC PRESSURE RANGE 50 ... 1100 hPa
Class B
Linearity* ±0.20 hPa
Hysteresis* ±0.08 hPa
Repeatability* ±0.08 hPa
Calibration uncertainty** ±0.15 hPa
Accuracy at +20 °C *** ±0.20 hPa
TEMPERATURE DEPENDENCE****
500 ... 1100 hPa ±0.1 hPa
50 ... 1100 hPa ±0.3 hPa
TOTAL ACCURACY -40 ... +60 °C (-40 ... +140 °F)
Class A Class B
500 ... 1100 hPa ±0.15 hPa ±0.25 hPa
50 ... 1100 hPa ±0.45 hPa
LONG-TERM STABILITY
500 ... 1100 hPa ±0.1 hPa/year
50 ... 1100 hPa ±0.1 hPa/year
* Defined as ±2 standard deviation limits of endpoint non-linearity,
hysteresis 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 endpoint
non-linearity, hysteresis error, repeatability error and calibration
uncertainty at room temperature.
**** Defined as ±2 standard deviation limits of temperature
dependence over the operating temperature range.
Inputs and Outputs
Supply voltage 10 ... 35 VDC
Supply voltage sensitivity negligible
Typical power consumption at +20 °C
(U
in
24 VDC, one pressure sensor)
RS-232 25 mA
RS-485 40 mA
U
out
25 mA
I
out
40 mA
display and backlight +20 mA
Serial I/O RS232C, RS485/422
Pressure units hPa, mbar, kPa, Pa inHg, mmH
2
0, mmHg, torr, psia
Class A Class B
Resolution 0.01 hPa 0.1 hPa
Settling time at power-up (one sensor) 4 s 3 s
Response time (one sensor) 2 s 1 s
Acceleration sensitivity negligible
Pressure connector M5 (10-32) internal thread
Pressure fitting barbed fitting for 1/8” I.D. tubing or quick
connector with shutoff valve for 1/8” hose
Maximum pressure limit 5000 hPa abs.
Compliance EMC standard EN61326-1:1997 + Am1:1998 +
Am2:2001: Industrial Environment
Accessories
Serial interface cable 19446ZZ
USB-RJ45 serial connection cable 219685
Software interface kit 215005
Wall mounting kit 214829
Outdoor installation kit (weather shield) 215109
Installation kit for pole or pipeline 215108
Power supply module POWER-1
Temperature compensated analog output module AOUT-1T
Isolated RS-485 module RS485-1
Analog Output (optional)
Current output 0 ... 20 mA, 4 ... 20 mA
Voltage output 0 ... 1 V, 0 ... 5 V, 0 ... 10 V
Accuracy at pressure range 500 ... 1100 hPa 50 ... 1100 hPa
at +20 °C ±0.30 hPa ±0.40 hPa
at -40 ... +60 °C ±0.60 hPa ±0.75 hPa
Mechanics
Housing material G AlSi10 Mg (DIN 1725)
Housing classification IP65 (NEMA4)
Weight 1 - 1.5 kg
Operating Environment
Pressure range 500 ... 1100 hPa, 50 ... 1100 hPa
Temperature range
operating -40 ... +60 °C (-40 ... +140 °F)
with local display 0 ... +60 °C (+32 ... +140 °F)
Data Transfer Software
MI70 Link Interface Software
Requirement: Microsoft
®
Windows OS
Microsoft
®
Excel
Ref. B210708EN-C ©Vaisala 2011
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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