Date ( Publication )

2011-03-30T17:51:00

Purpose

The purpose of this resource is to acquire data on:

- air temperature

- relative humidity

Status

Completed

Maintenance and update frequency

As needed

GEMET ( Theme )

• thermal power plant

Keywords

• SHARE , Network , Station , High Altitude

Keywords ( Place )

• Nepal , Lobuche , Khumbu Valley , Sagarmatha National Park

Keywords ( Theme )

• AWS

Keywords ( Theme )

• air temperature , relative humidity

Use limitation

No conditions apply

Access constraints

Copyright

Other constraints

Character set

UTF8

Topic category

• Climatology, meteorology, atmosphere
• Environment
• Geoscientific information

Supplemental Information

Reference system identifier

EPSG / WGS 84 (EPSG:4326) / 7.4

Topology level

Geometry only

Geometric object type

Point

Geometric object count

1

OnLine resource

Himalayas Reference Site Pyramid Station  

Himalayas Reference Site Pyramid Station

OnLine resource

https://geoportal.mountaingenius.org/portal/index.php/data/  

OnLine resource

https://geoportal.mountaingenius.org/geonetwork/srv/api/records/71a5f1cb-e9e0-44f1-8e5d-aa1adc8ed49c/attachments/Data%20Usage%20Policy.pdf  

Hierarchy level

Series

Statement

At the Pyramid Laboratory Observatory AWS the DMA570 Lsi-Lastem Thermohygrometer is mounted on a 2 m pole.

It is a probe for measuring air temperature and air relative humidity with replaceable sensitive element for simplify calibration and maintenance. LSI-Lastem supplies a precise and reliable set of probes, suitable for a continuous measurement in severe environments, in presence of deep thermal and hygrometric ranges with high sun radiant heat. An important feature of this set of sensor is that the thermohygrometric sensitive element is easily replaceable, in order to have a simple and rapid ordinary maintenance and avoiding calibration. The Thermohygrometer has supported a considerable improvement, owing to a deep technical and styling development process: a fan ensures a continuos air change around the sensor in order to eliminate temperature fault caused by radiant heat.

For temperature:

Range -30.+70°C

Sensitive element Pt100 1/3 DIN-B

Accuracy ± 0,1°C (0°C)

Hysteresis&Repeatability na

Resolution 0,025°C

Long term stability -0.04% (after 5 years at 200°C)

Calibration uncertainty 0,1°C

Response time (T63) Wind speed 0,3-0,5 m/s: 80sec

Radiation shield efficiency with respect to forced ventilation sensor (wind 0,5m/s, rad.800 W/m2): +0,6°C

For relative humidity:

Range: Nom.0..100%, Eff.10..98%

Sensitive element Capacitive

Accuracy 2,5% (11-90%) 0,6°C (20°C, 50%RH)

Hysteresis&Repeatability 0,5%

Resolution 0,2%

Long term stability -2%/year (at 75%RH) n.a.

Calibration uncertainty 0,1°C 1,5% na

Response time (T63) Wind speed 0,3-0,5 m/s: 80sec

Radiation shield efficiency with respect to forced ventilation sensor (wind 0,5m/s, rad.800 W/m2): n.a.

General characteristic:

Ventilation: Natural

Electric output Jumper locally selectable 2 x 0-20 mA, 4-20 mA, 0-5 V, 1-5 V. 60-300 mV

Output signals Output n.1: temperature. Output n.2: RH% or dew point (default RH%)

Operating temperature -30°+70°C

Sampling rate 1 sec. (default) PC programmable 1..300 sec.

N°acquisitions for mobile average calculation: N°1 (default), PC programmable 1..20 acquisitions

Load resistance (mA output): DMA570 300 Ohm

gmd:MD_Metadata

File identifier

71a5f1cb-e9e0-44f1-8e5d-aa1adc8ed49c   XML

Metadata language

eng

Character set

UTF8

Parent identifier

d156500b-6e83-40e9-abb1-a87e53ea0224

Hierarchy level

Series

Date stamp

2025-02-07T16:36:07

Metadata standard name

ISO 19115:2003/19139

Metadata standard version

1.0