EIJKELKAMP WS-GP2 Quick Start Manual

16.92 Weather Station

WS-GP2 Weather Station for wind speed and direction, relative
humidity, air and soil temperature, rain and solar radiation

Quick Start Guide

Version 1.0

P.O. Box 4, 6987 ZG Giesbeek
Nijverheidsstraat 30,
6987 EM Giesbeek,
The Netherlands

T [phone]
F [phone]
E [e-mail]
I http://www.eijkelkamp.com

Page 2

Introduction

The WS-GP2 Weather Station measures wind speed and direction, air temperature,
relative humidity, solar radiation, rainfall and soil temperat ur e .

This guide explains how to choose a site, install the mast, mount and align the
sensors. Then, using a PC we show how to change the weather station program,
check the sensor readings, then acquire and display readings.

Description

The weather station has a 2m high by 48 mm diameter anodised aluminium mast.
Cross arm, connectors and fitti ngs are provided for sensors and a GP2 data logger.
The mast attaches to the ground via the standard base. This may be pinned to the
ground by the stakes provided or bolted down on to concrete or rock.

The M2-BASE is an optional extra suitable for fixing into concrete
A levelling mechanism fits on the top of the mast for mounting a type ES2
solar radiation sensor.
The cross arm is installed near the top of the mast and has adapter to take
a combined wind direction and speed sensor.
Below this can fit a bracket holding the combined air temperature and
humidity sensor in a radiation shield.
The RG2-BP rain gauge has a base-plate to be staked level on the ground.

1 Unpacking

Check your contents against your order - you should have:-

M2 mast with cross arm, steel guy ropes, baseplate, stakes, logger can opy , U-

bolts, and GP2 Logger and a logger canopy

See Figure 1 and the Parts Index on page Error! Bookmark not defined.
Wind speed and direction sensor AN-WD2-03
RH and air temperature sensor RHT2nl-03
Solar energy flux sensor ES2-05
Rain gauge RG2+BP-06
Soil Temperature sensor ST1-05
GP2 Logger, with GP2-USB cable and GP2 User Manual
Delta-T Software and Manuals CD including DeltaLINK3

You may need a pic kax e and shovel to prepare the site.
You will need a PC running DeltaLINK3 (supplied with the GP2 logger).

Standard

base

M2-BASE

Page 3

Identify Parts

Figure 1: WS-GP2 Weather Station Mast and Sensor Parts (not to scale)

Page 4

1) Ground stake (x3)

2) D-shackle (x6) size: 3/16 inch

3) Ring bolt (x3) size: M6

4) Lock nut. (x3 s ize: M6
plus x3 with a reverse screw thread)

5) Guy- line tensioning sha ck le /straining screws (x3).

6) Hook bolt (x3

7) Stainless steel guy rope (3x 1.5m)

8) Ring bolt & lock nut (size:M8)

9) Mounting bracket for RHT2 sensor.

10) RHT2 radiation shield.

11) Mast to ball & socket connector

12) Ball & socket levelling device.

13) M8 nut.

14) Levelling plate

15) ES2 solar radiation sensor

16) Bubble level.

17) Spanner for ball and socket device 22mm locknuts

18) Mast to cross arm connector

19) Cross arm (1m x 32mm) with 6.5 mm dia. holes at 4 positions

20) Combined wind speed and direction sensor.

21) Alignment hub

22) Cross arm end pl ug x2.

23) Cross ar m adapter

24) Allen key for cross arm adapter.

25) Stand offs for mounting GP2 to Logger Canopy ( 4x M4 x 15mm)

26) Logger canopy

27) GP2 data logger

28) Logger- canopy conectors

29) Protective spiral wrap for canopy U bolts (x2).

30) Protective strip (x4).

31) U bolt clamp plate (51mm x2)

32) Nuts & washers (x4 size: M6).

33) U Bolts (51mm x2)

34) RG2 rain gauge.

35) Right angle brackets (x2) with self- tapping screws
for mounting RG2 to base-plate.

36) Stakes for RG2 base plate (x4)

37) Base plate for RG 2

38) Stake for M2 Mast base-plate x2

39) M2 mast base

40) Allen key (8mm)

41) ST1 soil temperature probe.

42) Adjustable spanner

43) Mallet

44) Optional extra type M2-BASE for fixing mast in

concrete (7¼ x 5½ inch, internal depth 5 inch)

Page 5

2 Choose the Location

Results depend not just on sensor accura cy and reliability but also on how
representative the site is – so choose the site caref u lly .
Where data is to be compared to a “standard” meteorological site, the sensors should
be exposed in a similar way to sensors at the standard sites, i.e. over a level surface of
short grass and away from tre es or buildi ngs .
These are rough guidelines. Refer to meteorological publications for further advice.
e.g. http://www.wmo.int/web/www/IMOP/WebPortal-AWS/Index02.html

Rules of thumb

Near a building, mount the sensors outside the
zone of influence. Horizontally this extends
roughly twice the height of the building upstream
and ten times downstream. Vertically it extends
to about twice the height of the structure.
If the requirement is to measure the true local
conditions, e.g. a field of newly planted corn,
select a relatively uniform area of the terrain. Be
aware that, as a crop grows up towards the
sensors, the measured wind speed decreases
as the canopy approaches.
Sensors are also influenced by the changing
local thermal and humid ity microclimate above
the crop. There are no simple rules to follow –
but be aware of the following:

Clothes line effect: vegetation upwind may

affect vapour gradients and heat transfer.

Oasis effect: If an isolated source of water, e.g.

a lake or glacier, is surrounded by a relatively
arid area, then the relative humidity may be
affected if the wind direction draws air from the
water source.

Leading Edge effect: When air moves over the

boundary between two s urfaces that differ in
temperature, moisture content, roughness or
some other characteris tic, it takes time for the air
to adjust. The line of discontinuity is known as
the leading edge. The boundary layer will vary in
vertical extent with distance from the leading
edge as it adjusts to the new conditions.

Thermal plume effect: Avoid placing objects

directly under the air humidity and temperature sensor, such as a solar panel, which
can create a rising thermal plume when warmed by the sun.

Figure 2: Location

Page 6

3 Assembly

Figure 4

Steps to
assembly