Campbell CS300 Bedienungsanleitung

CS300 Pyranometer

Revision: 1/11

Campbell Scientific, Inc.

WARRANTY AND ASSISTANCE

This equipment is warranted by CAMPBELL SCIENTIFIC (CANADA) CORP. (“CSC”) to

be free from defects in materials and workmanship under normal use and service for

six (6) months from date of shipment unless specified otherwise. ***** Batteries

are not warranted. ***** CSC's obligation under this warranty is limited to repairing or

replacing (at CSC's option) defective products. The customer shall assume all costs of

removing, reinstalling, and shipping defective products to CSC. CSC will return such

products by surface carrier prepaid. This warranty shall not apply to any CSC 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. CSC is not

liable for special, indirect, incidental, or consequential damages.

Products may not be returned without prior authorization. To obtain a Return

Merchandise Authorization (RMA), contact CAMPBELL SCIENTIFIC (CANADA) CORP.,

at (780) 454-2505. An RMA number will be issued in order to facilitate Repair Personnel

in identifying an instrument upon arrival. Please write this number clearly on the outside

of the shipping container. Include description of symptoms and all pertinent details.

CAMPBELL SCIENTIFIC (CANADA) CORP. does not accept collect calls.

Non-warranty products returned for repair should be accompanied by a purchase order to

cover repair costs.

11564 149 Street | Edmonton AB T5M 1W7

780.454.2505 | fax 780.454.2655 | campbellsci.ca

PLEASE READ FIRST

About this manual

Please note that this manual was originally produced by Campbell Scientific Inc. (CSI) primarily

for the US market. Some spellings, weights and measures may reflect this origin.

Some useful conversion factors:

Area: 1 in2(square inch) = 645 mm2

Length: 1 in. (inch) = 25.4 mm

1 ft (foot) = 304.8 mm

1 yard = 0.914 m

1 mile = 1.609 km

Mass: 1 oz. (ounce) = 28.35 g

1 lb (pound weight) = 0.454 kg

Pressure: 1 psi (lb/in2) = 68.95 mb

Volume: 1 US gallon = 3.785 litres

In addition, part ordering numbers may vary. For example, the CABLE5CBL is a CSI part

number and known as a FIN5COND at Campbell Scientific Canada (CSC). CSC Technical

Support will be pleased to assist with any questions.

CS300 Table of Contents

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 Description.....................................................1

2. Specifications ..............................................................1

3. Installation....................................................................2

4. Wiring............................................................................4

5. Programming ...............................................................4

5.1 Example Programs....................................................................................5

5.1.1 CR1000 Example Program .............................................................5

5.1.2 CR10X Example Program ..............................................................6

5.2 Total Solar Radiation................................................................................8

6. Maintenance and Calibration......................................8

7. Troubleshooting ..........................................................9

Figures

3-1. CM225 Pyranometer Mounting Stand and CM202 Crossarm ................3

3-2. 015ARM Pyranometer Mounting Arm ...................................................3

4-1. CS300 Schematic ....................................................................................4

Tables

4-1. Connections to Campbell Scientific Dataloggers....................................4

5-1. Multipliers Required for Average Flux and Total Flux Density in SI

and English Units.................................................................................5

5-2. Wiring for Example Programs ................................................................5

CS300 Pyranometer

1. General Description

The CS300 measures incoming solar radiation with a silicon photovoltaic

detector mounted in a cosine-corrected head. Output from the detector is a

current, which is converted to voltage by a potentiometer potted in the sensor

head. The resistance of the potentiometer is adjusted when the sensor is

calibrated so that all sensors have the same output sensitivity.

The CS300 is calibrated against a Kipp and Zonen CM21 under natural

sunlight to accurately measure sun plus sky radiation (300 to 1100 nm). The

CS300 should not be used under vegetation or artificial lights.

During the night the CS300 may read slightly negative incoming solar

radiation. This negative signal is caused by RF noise passing through the

photo-diode. Negative values may be set to zero in the datalogger program.

For more theoretical information on the silicon photovoltaic detector see Kerr,

J. P., G. W. Thurtell, and C. B. Tanner: An integrating pyranometer for

climatological observer stations and mesoscale networks. J. Appl. Meteor., 6,

688-694.

2. Specifications

Power requirements: none, self-powered

Absolute accuracy: ±5% for daily total radiation

Cosine response: ±4% at 75° zenith angle

±1% at 45° zenith angle

Temperature response: <1% at 5° to 40°C

Long-term stability: <2% per year

Operating temperature: -40° to +55°C

Relative humidity: 0 to 100%

Output: 0.2 mV per W m-2

Dimensions: 0.9" (2.4 cm) diameter, 1.0" (2.5 cm) height

Weight: 2.3 oz (65 g) with 2 m lead wire

Measurement range: 0 to 2000 W m-2 (full sunlight |1000 W m-2)

Light spectrum waveband: 300 to 1100 nm

The black outer jacket of the cable is Santoprene® rubber. This

compound was chosen for its resistance to temperature extremes,

moisture, and UV degradation. However, this jacket will

support combustion in air. It is rated as slow burning when

tested according to U.L. 94 H.B. and will pass FMVSS302.

Local fire codes may preclude its use inside buildings.

NOTE

CS300 Pyranometer

3. Installation

The CS300 should be mounted such that it is never shaded by the tripod/tower

or other sensors. The sensor should be mounted with the cable pointing

towards the nearest magnetic pole, e.g., in the Northern Hemisphere point the

cable toward the North Pole.

Mounting height is not critical for the accuracy of the measurement. However,

pyranometers mounted at heights of 3 m or less are easier to level and clean.

To ensure accurate measurements, the CS300 should be mounted using

PN 18356 base/leveling fixture, which incorporates a bubble level and three

adjustment screws. The CS300 and base/leveling fixture are attached to a

tripod or tower using one of three mounting configurations (see Figures 3-1

and 3-2).

Newer CS300 pyranometers have a bulge in their cable

that contains a circuit board (located 18” from the sensor

head). The bulge should be mounted on the underside of

the mounting arm to give some protection from direct

sunlight. To prevent the circuit board from being moved or

stressed, cable tie each side of the bulge to the mounting

arm.

CAUTION

Tools required for installation on a tripod or tower:

Small and medium Phillips screwdrivers

1/2” open end wrench for CM225 or 015ARM (Figures 3-1, 3-2)

Tape measure

UV-resistant cable ties

Side-cut pliers

Compass

Step ladder

Remove the red cap after installing the sensor. Save this cap for

shipping or storing the sensor.

NOTE

CS300 Pyranometer

PN 18356 Base

ossarm

CM225 Stand

CM200 Series Cr

FIGURE 3-1. CM225 Pyranometer Mounting Stand

and CM202 Crossarm

CS300 Pyranometer

PN 18356 Base

015ARM

FIGURE 3-2. 015ARM Pyranometer Mounting Arm

CS300 Pyranometer

4. Wiring

A schematic diagram of the CS300 is shown in Figure 4-1.

RED

BLACK

CLEAR

500 to 600 :

typical

Single-Ended

Analog Input

Ground/AG

Ground/G

FIGURE 4-1. CS300 Schematic

Connections to Campbell Scientific dataloggers are given in Table 4-1. When

Short Cut for Windows software is used to create the datalogger program, the

sensor should be wired to the channels shown in the wiring diagram created by

Short Cut.

TABLE 4-1. Connections to Campbell Scientific Dataloggers

Color

Wire Label

CR9000(X)

CR5000

CR3000

CR1000

CR800

CR850

CR510

CR500

CR10(X)

21X

CR7

CR23X

CR200(X)

Red Signal SE Analog SE Analog SE Analog SE Analog

Black Signal

Reference

Clear Shield

5. Programming

This section is for users who write their own datalogger programs. A

datalogger program to measure this sensor can be created using Campbell

Scientific’s Short Cut Program Builder software. You do not need to read this

section to use Short Cut.

The output from the CS300 is 0.2 mV per Wm-2. The voltage signal from the

CS300 is measured using the single-ended voltage instruction (VoltSE in

CRBasic or Instruction 1 in Edlog). Dataloggers that use CRBasic include the

CR200(X), CR800, CR850, CR1000, CR3000, CR5000, and CR9000(X).

Dataloggers that use Edlog include CR7, CR10(X), CR510, and CR23X. Both

CRBasic and Edlog are included in PC400 and LoggerNet datalogger support

software.

CS300 Pyranometer

Solar radiation can be recorded as an average flux density (W m-2) or daily

total flux density (MJ m-2). The appropriate multipliers are listed in Table 5-1.

Negative values should be set to zero before being processed.

TABLE 5-1. Multipliers Required for Average Flux

and Total Flux Density in SI and English Units

UNITS MULTIPLIER PROCESS

W m-2 5.0 Average

MJ m-2 t * 0.000005 Total

kJ m-2 t * 0.005 Total

cal cm-2 min-1 0.005 * (1.434) Average

cal cm-2 t * 0.005 * (0.0239) Total

t = datalogger execution interval in seconds

Nearby AC power lines, electric pumps, or motors can be a source of electrical

noise. If the sensor or datalogger is located in an electrically noisy

environment, the measurement should be made with the 60 or 50 Hz rejection

integration option as shown in the example programs.

5.1 Example Programs

The following programs measure the CS300 every 10 seconds and convert the

mV output to Wm-2 and MJm-2. Both programs output an hourly average flux

(Wm-2), and a daily total flux density (MJm-2). Negative values are set to zero

before being processed. Wiring for the examples is given in Table 5-2.

TABLE 5-2. Wiring for Example Programs

Color Description CR1000 CR10X

Red Signal SE 1 SE 1

Black Signal Ground

Clear Shield

5.1.1 CR1000 Example Program

'CR1000

'Declare Variables and Units

Public SlrW

Public SlrMJ

Units SlrW=W/m²

Units SlrMJ=MJ/m²

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