Campbell Scientific CS800 User Manual

INSTRUCTION MANUAL

CS800-L Climatronics Wind

Speed and Direction Sensor

Revision: 10/95

Copyright (c) 1995

Campbell Scientific, Inc.

Warranty and Assistance

The CS800-L CLIMATRONICS WIND SPEED AND DIRECTION
SENSOR is warranted by CAMPBELL SCIENTIFIC, INC. to be free from

defects in materials and workmanship under normal use and service for twelve
(12) months from date of shipment unless sp ecified otherwise. Batteries have
no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty
is limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s
option) defective products. The customer shall assume all costs of removing,
reinstalling, and shipping defective products to CAMPBELL SCIENTIFIC,
INC. CAMPBELL SCIENTIFIC, INC. will return such products by surface
carrier prepaid. This warranty shall not apply to any CAMPBELL
SCIENTIFIC, INC. products which have been subjected to modification,
misuse, neglect, accidents of nature, or shipping damage. This warranty is in
lieu of all other warranties, expressed or implied, including warranties of
merchantability or fitness for a particular purpose. CAMPBELL SCIENTIFIC,
INC. is not liable for special, indirect, incidental, or consequential damages.

Products may not be returned without prior authorization. The following
contact information is for US and International customers residing in countries
served by Campbell Scientific, Inc. directly. Affiliate companies handle repairs
for customers within their territories. Please visit www.ca mpbellsci.co m to
determine which Campbell Scientific company serves your country. To obtain
a Returned Materials Authorization (RMA), contact CAMPBELL
SCIENTIFIC, INC., phone [phone]. After an applications engineer
determines the nature of the problem, an RMA number will be issued. Please
write this number clearly on the outside of the shipping container.
CAMPBELL SCIENTIFIC's shipping address is:

CAMPBELL SCIENTIFIC, INC.

RMA#_____
815 West 1800 North
Logan, Utah 84321-1784

CAMPBELL SCIENTIFIC, INC. does not accept collect calls.

CS800-L CLIMATRONICS WIND SPEED AND DIRECTION SENSOR

TABLE OF CONTENTS

PAGE

PDF viewers note: These page numbers refer to the printed version of this document. Use
the Adobe Acrobat® bookmarks tab for links to specific sections.

1. GENERAL............................................................................................................1

2. SPECIFICATIONS................................................................................................2

2.1 Performance and Electrical Specifications.................................................................................2

2.2 Physical Dimensions..................................................................................................................2

3. INSTALLATION....................................................................................................3

3.1 Siting ..........................................................................................................................................3

3.2 Sensor Mounting........................................................................................................................3

4. SENSOR WIRING................................................................................................3

5. DATALOGGER PROGRAMMING........................................................................3

5.1 CR10 Programming Example....................................................................................................4

5.2 21X Programming Example.......................................................................................................4

6. SENSOR MAINTENANCE ...................................................................................4

7. TROUBLESHOOTING .........................................................................................5

7.1 Wind Direction............................................................................................................................5

7.2 Wind Speed................................................................................................................................5

FIGURES

1 CS800-L Climatronics Wind Speed and Direction Sensor.........................................................1

2 Physical Dimensions..................................................................................................................2

3 CS800-L Wiring..........................................................................................................................3

This is a blank page.

CS800-L CLIMATRONICS

WIND SPEED AND DIRECTION SENSOR

1. GENERAL

The CS800-L sensors meet Environmental
Protection Agency (EPA) Prevention of
Significant Deterioration (PSD) requirements for
measuring wind speed and direction. The
sensors are mounted to a prewired crossarm,
which mounts to 3/4” IPS (1.05 inch O.D.)
vertical pipe stub. The 019ALU crossarm is
required to mount the CS800-L to the UT930
10m tower as shown in Figure 1, which allows
the lightning rod to be attached directly to the
mast.

Wind speed is sensed by a 3-cup anemometer
coupled to a light chopper that outputs a
frequency proportional to wind speed. Wind
direction is sensed by a wind vane coupled to a
precision low-torque potentiometer. Both
sensors use stainless steel precision ball
bearings for maximum life and low starting
thresholds.

Cable length is specified in feet, following the
(-L). Specify a 34 foot lead (CS800-L34) for
mounting the sensor to the UT930 10 m tower.

Lightning Rod

CS800-L

019 ALU Crossarm

UT930 10M Tower

CS800-L Crossarm

Figure 1. CS800-L Climatronics Wind Speed and Direction Sensor

1

CS800-L CLIMATRONICS WIND SPEED AND DIRECTION SENSOR

−

2. SPECIFICATIONS

2.1 PERFORMANCE AND ELECTRICAL SPECIFICA TIONS

Performance Speed Wind
Accuracy 0.25 mph or 1.5% ± 3°

Threshold <1 mph <1 mph
Distance Constant 8.0 ft. of air max 8.0 ft. of air max
Damping Ratio 0.4 to 0.6 at 10° displacement
Operating Range 0 - 125 mph 0 - 360° - mechanical

Signal Output 20-hole photo chopper, 2K ohm potentiometer

Temperature Range -40 to 140 °F
Power Requirements 5-7 VDC at 1 mA nominal

2.2 PHYSICAL DIMENSIONS

Wind Direction

amplitude dependent on 0 - excitation voltage
supply voltage; frequency proportional to 0 - 355°
proportional to wind speed:

mph 0 3

.

Freq (Hz) =

14388

.

17.50 in.

8.37 in.

MOUNT ON 3/4" PIPE (1.05 O.D.)

13.75 in.

27.50 in.

Figure 2. Physical Dimensions

3.75 in.

6.75 in.

2

CS800-L CLIMATRONICS WIND SPEED AND DIRECTION SENSOR

A

A

3. INSTALLATION

3.1 SITING

As a rule of thumb, wind sensors should be
located away from obstructions (e.g., trees or
buildings) by a horizontal distance of at least ten
times the height of the obstruction. If it is
necessary to mount the sensors on the roof of a
building, the height of the sensors above the
roof should be at least 1.5 times the height of
the building.

3.2 SENSOR MOUNTING

Tools Required:

• 5/64” (for 019ALU crossarm) and 1/16”
allen wrenches

• compass and declination angle for site

• small screwdriver provided with datalogger

• UV resistant cable ties

• small pair of diagonal-cutting pliers

• 6 - 10” torpedo level

Attach the vane and cupset to the crossarm
shafts as shown in Figure 1. Place the cupset
on the shaft directly above the circular
connector and tighten the two set screws.
Place the vane on the opposite shaft and align
the flats on the vane hub and shaft as indicated.
A small coin held against the flats will maintain
the alignment of the flats while the two set
screws are tightened.

The CS800-L crossarm mounts to the top of the
UT930 tower as shown in Figure 1. Orient the
019ALU crossarm so that the end with the 3/4”
NU-RAIL connector points North. Position the
top of the 3/4” mounting post (provided with the
sensor) 5” above the NU-RAIL and tighten the
two set screws. Mount the sensor crossarm to
the mounting post. Orient the sensor crossarm
so that the vane end points East and tighten the
set screws. Level the sensor crossarm by
adjusting the NU-RAIL connector attached to
the 019ALU crossarm. Refer to the UT930
Weather Station Installation Manual for a
discussion on declination angle and sensor
alignment to True North.

Attach the sensor cable to the crossarm
connector. Make sure both connectors are
properly keyed and tighten the knurled ring
finger-tight. Route the sensor cable along the
underside of the crossarm to the tower mast
and down a tower leg to the instrument

enclosure. Secure the cable to the crossarm
and mast using cable ties.

4. SENSOR WIRING

Wire the CS800-L to the datalogger as shown in
Figure 3.

6-Pin

CS800-L

Photochopper
circuit for
wind speed

Connector

2 K

black/red
(wind speed reference)

B

white
(5-7 VDC)

C

black/green
(azimuth reference)

D

red
(wind speed signal)

E

black/white
(azimuth excitation)

1 M

F

green
(azimuth signal)

N/C

clear
(shield)

Cable

Figure 3. CS800-L Wiring

* Ground on the 21X and CR7
** CAO port set to 5V on the 21X and CR7

The excitation, pulse and analog input channels
listed above correlate with the measurement
instructions shown in Section 5, and those that
are used with the WeatherPro Software. The
input channels and input locations are intended
as examples only.

5. DATALOGGER PROGRAMMING

The output from the anemometer is a high
frequency pulse that is measured with
Instruction 3. Use a configuration code of 20 for
parameter 3, which gives a result in frequency.
The multiplier and offset converts the frequency
to the desired wind speed units (see example
below).

Wind direction is measured with Instruction 4.
Use an excitation voltage of 2500 with the
CR10, or 5000 mV with the 21X or CR7
dataloggers. The potentiometer has an
electrical range of 355°, with a 5° dead band
between 355 - 360°. The multiplier to convert
mV to degrees is 355 degrees / excitation

Datalogger

G

5V**

G*

P1

E2

SE4

G

3

CS800-L CLIMATRONICS WIND SPEED AND DIRECTION SENSOR

voltage; which is 0.142 deg/mV for the CR10, or

0.071 deg/mV for the 21X or CR7 dataloggers
(Sections 5.1, 5.2).

5.1 CR10 PROGRAMMING EXAMPLE

Wind Speed:

P3 Pulse
01: 1 Repetitions
02: 1 Pulse Input Channel
03: 20 High Frequency; Output Hz
04: 4 Input Location [ W_SPD_mph ]
05: .14388*Multiplier
06: .3** Offset

Wind Direction:

P4 Excite, Delay, Volt (Single-Ended)
01: 1 Repetitions
02: 5 2500 mV slow range
03: 4 Single-Ended Input Channel
04: 2 Excitation Channel
05: 0 Delay
06: 2500 Excitation mV
07: 5 Input Location [ W_Dir_deg ]
08: .142 Multiplier
09: 0 Offset

Output Processing:

P92 If time is
01: 0 minutes
02: 60 minute interval
03: 10 Set high Flag 0 (output)

P77 Real Time
01: 0110 Day, Hour-Minute

P69 Wind Vector
01: 1 Repetitions
02: 0 Samples per sub-interval
03: 00 Polar Sensor type, output

avg wind speed, direction,

standard deviation
04: 4 Wind speed [ W_SPD_mph ]
05: 5 Wind direction [ W_Dir_deg ]

Units (CR10/21X) *Multiplier
mph .14388 .3

knots .12494 .26052
m/sec .06432 .1341

**Offset

5.2 21X PROGRAMMING EXAMPLE

Set CAO channel 1 to 5V to power sensor:

P30 Z=F
01: 5000 F
02: 20 Z Loc [ CAO_mV]

P21 Analog Out
01: 1 CAO Chan
02: 20 mV Loc [ CAO_mV]

Measure sensors:

P3 Pulse
01: 1 Reps
02: 1 Pulse Input Chan
03: 20 High Frequency, Output Hz
04: 3 Loc [ W_SPD_mph]
05: .14388*Mult
06: .3** Offset

P4 Excite Delay Volt (SE)
01: 1 Reps
02: 5 5000 mV Slow Range
03: 4 In Chan
04: 2 Excite all reps w/Exchan 2
05: 0 Delay (units 0.01 sec)
06: 5000 mV Excitation
07: 5 Loc [ W_Dir_deg ]
08: .071 Mult
09: 0 Offset

See CR10 example for Output Processing
Instructions

6. SENSOR MAINTENANCE

The CS800-L should be visually inspected every
1 - 3 months, depending on site conditions and
the desired accuracy. Damaged cupsets and
vanes should be replaced. Bearings in the
anemometer and vane should be replaced on a
periodic basis, or when measured starting
torque exceeds predetermined thresholds.

A suggested maintenance schedule is as
follows:

1 month:

• Visually inspect the cupwheel and vane

assemblies for damage.

• Do a visual/audio inspection of the

anemometer at low speeds. Make sure the
cupwheel assembly rotates freely, without
any wobble. Worn bearings will often
produce an audible noise.

4

CS800-L CLIMATRONICS WIND SPEED AND DIRECTION SENSOR

3 month:

• Measure bearing torque to determine if
bearings need replacement (unless
bearings are being replaced on a periodic
schedule). For a 1 mph starting threshold,
bearing torque should not exceed 0.28 g­cm for the anemometer, and 6.0 g-cm for
the vane.

If bearing torque is measured, starting
threshold can be computed using the
following equation:

u = (T/K)

1/2

where:

u = wind speed (m/sec)
T = torque (g-cm)
K = is a constant for the

aerodynamic shape (g)

K = 1.4 for the anemometer
K = 30.0 for the vane

12 month:

• Replace anemometer bearings.

• Check vane linearity.

24 month:

• Replace vane bearings.

Bearing replacement based on torque
measurements has advantages in that: 1) the
bearings are only replaced when necessary, 2)
a history of bearing life is established, and 3)
the starting threshold of the sensor can be
determined. Torque watches for measuring
bearing torque are available from the
manufacturer (Climatronics 516/567-7300), for
approximately $1100 (2 required).

7. TROUBLESHOOTING

7.1 WIND DIRECTION

-99999 or random negative numbers displayed
in input location

a. Make sure the battery voltage is

between 9.6 and 16 VDC.

b. Verify the sensor is wired to the Single-

Ended input channel specified by
parameter 3 of Instruction 4 (Single­Ended channels are numbered
sequentially starting at 1H, i.e., 1L is
Single-Ended channel 2).

c. Make sure parameter 2 of Instruction 4

is 5.

0.0000 or slightly negative numbers displayed in
input location

a. Make sure the execution interval has

been entered in the program table.

b. Verify the sensor is wired to the

excitation channel specified by
parameter 4 of Instruction 4.
Parameter 6 should be 2500 for the
CR10, 5000 for the 21X/CR7.

7.2 WIND SPEED

Unreasonable results displayed in input
location:

a. Inspect the sensor for damage or

contamination

b. Check that the multiplier and offset in

Instruction 3 are correct for the desired
engineering units.

Offset only displayed in input location:

a. Make sure the sensor is properly wired

to the 5V and G terminals on the CR10,
or to the CAO port and ground on the
21X or CR7 dataloggers. When using
the CAO port, Instructions 30 and 21
should precede the sensor
measurement instructions, and
executed each time through the
program table. Verify 5V is present on
the 5V terminal or CAO port using a
voltmeter.

This is a blank page.

5

CS800-L CLIMATRONICS WIND SPEED AND DIRECTION SENSOR

This is a blank page.

6

This is a bla nk page.

Campbell Scientific Companies

Campbell Scientific, Inc. (CSI)

815 West 1800 North

Logan, Utah 84321

UNITED STATES
www.campbellsci.com
[e-mail]

Campbell Scientific Africa Pty. Ltd. (CSAf)

PO Box 2450

Somerset West 7129

SOUTH AFRICA

www.csafrica.co.za

[e-mail]

Campbell Scientific Australia Pty. Ltd. (CSA)

PO Box 444

Thuringo wa Cent ra l
QLD 4812 AUSTRALIA
www.campbellsci.com.au

[e-mail]

Campbell Scientific do Brazil Ltda . (CSB)

Rua Luisa Crapsi Orsi, 15 Butantã

CEP: 005543-000 São Paulo SP BRAZIL

www.campbellsci.com.br

[e-mail]

Campbell Scientific Canada Corp. (CSC)

11564 - 149th Street NW

Edmonton, Alberta T5M 1W7

CANADA

www.campbellsci.ca

[e-mail]

Campbell Scientific Ltd. (CSL)

Campbell Park

80 Hathern Road

Shepshed, Loughborough LE12 9GX

UNITED KINGDOM

www.campbellsci.co.uk

[e-mail]

Campbell Scientific Ltd. (France)

Miniparc du Verger - Bat. H

1, rue de Terre Neuve - Les Ulis

91967 COURTABOEUF CEDEX

FRANCE

www.campbellsci.fr

[e-mail]

Campbell Scientific Spain, S. L.

Psg. Font 14, local 8

08013 Barcelona

SPAIN
www.campbellsci.es
[e-mail]

Please visit www.campbellsci.com to obtain contact information for your local US or International representative.