Campbell Scientific LP02 User Manual

INSTRUCTION MANUAL

LP02 Pyranometer

Copyright © 2006- 2014

Campbell Scientific, Inc.

Revision: 1/14

Warranty

“PRODUCTS MANUFACTURED BY CAMPBELL SCIENTIFIC, INC. are
warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in
materials and workmanship under normal use and service for twelve (12)
months from date of shipment unless otherwise specified in the corresponding
Campbell pricelist or product manual. Products not manufactured, but that are
re-sold by Campbell, are warranted only to the limits extended by the original
manufacturer. Batteries, fine-wire thermocouples, desiccant, and other
consumables have no warranty. Campbell’s obligation under this warranty is
limited to repairing or replacing (at Campbell’s option) defective products,
which shall be the sole and exclusive remedy under this warranty. The
customer shall assume all costs of removing, reinstalling, and shipping
defective products to Campbell. Campbell will return such products by surface
carrier prepaid within the continental United States of America. To all other
locations, Campbell will return such products best way CIP (Port of Entry)
INCOTERM® 2010, prepaid. This warranty shall not apply to any products
which have been subjected to modification, misuse, neglect, improper service,
accidents of nature, or shipping damage. This warranty is in lieu of all other
warranties, expressed or implied. The warranty for installation services
performed by Campbell such as programming to customer specifications,
electrical connections to products manufactured by Campbell, and product
specific training, is part of Campbell’s product warranty. CAMPBELL
EXPRESSLY DISCLAIMS AND EXCLUDES ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. Campbell is not liable for any special, indirect,
incidental, and/or consequential damages.”

Assistance

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.campbellsci.com to determine which Campbell Scientific company serves

your country.

To obtain a Returned Materials Authorization (RMA), contact CAMPBELL
SCIENTIFIC, INC., phone [phone]. After an application 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

For all returns, the customer must fill out a “Statement of Product Cleanliness
and Decontamination” form and comply with the requirements specified in it.
The form is available from our web site at www.campbellsci.com/repair. A
completed form must be either emailed to [e-mail] or faxed to
[phone]. Campbell Scientific is unable to process any returns until we
receive this form. If the form is not received within three days of product
receipt or is incomplete, the product will be returned to the customer at the
customer’s expense. Campbell Scientific reserves the right to refuse service on
products that were exposed to contaminants that may cause health or safety
concerns for our employees.

Table of Contents

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

1. Introduction ................................................................. 1

2. Cautionary Statements ............................................... 1

3. Initial Inspection ......................................................... 1

3.1 Ships With ............................................................................................ 1

3.2 Calibration Certificate .......................................................................... 1

4. Quickstart .................................................................... 2

4.1 Siting Considerations ........................................................................... 2

4.2 Mounting .............................................................................................. 2

4.3 Use SCWin to Program Datalogger and Generate Wiring Diagram .... 5

5. Overview ...................................................................... 8

6. Specifications ............................................................. 8

7. Operation ................................................................... 10

7.1 Wiring ................................................................................................ 10

7.2 Programming ...................................................................................... 11

7.2.1 Input Range ................................................................................. 11

7.2.2 Multiplier .................................................................................... 12

7.2.3 Offset .......................................................................................... 12

7.2.4 Example Programs ...................................................................... 12

7.2.4.1 CR1000 Example Program ............................................... 13

7.2.4.2 CR10X Example Program ................................................ 14

7.2.5 Output Format Considerations .................................................... 15

8. Maintenance .............................................................. 16

9. Troubleshooting........................................................ 16

Appendix

CM245 Adjustable Angle Mounting Stand ............ A-1

A.

Figures

A.1 Installation ....................................................................................... A-1

4-1. CM225 Bracket Attached to a Crossarm .............................................. 2

4-2. CM225 Bracket Attached to a Mast ..................................................... 3

4-3. LP02 Mounting Hole ............................................................................ 3

i

Table of Contents

Tables

4-4. CM225 Bracket Mounting Holes ........................................................ 4

4-5. LP02 Pyranometer Attached to CM225 Solar Sensor Mounting

Stand ................................................................................................ 4

7-1. LP02 Schematic ................................................................................. 10

A-1. CM245 bracket with 2.125 in. U-bolts positioned to mount the

pyranometer horizontally on a crossarm ...................................... A-1

A-2. CM245 bracket with 1.5 in. U-bolts positioned to mount

pyranometer at a 40° angle on a vertical pipe .............................. A-2

7-1. Differential Connections to Campbell Scientific Dataloggers ........... 10

7-2. Single-Ended Connections to Campbell Scientific Dataloggers........ 11

7-3. Multipliers Required for Flux Density and Total Fluxes ................... 12

7-4. Wiring for Example Programs ........................................................... 13

ii

LP02 Pyranometer

1. Introduction

The LP02 is an ISO-second-class pyranometer that monitors solar radiation for
the full solar spectrum range. It produces a millivolt signal that can be
measured directly by a Campbell Scientific datalogger. The LP02 can provide
solar radiation measurements for many meteorological applications. This
pyranometer is manufactured by Hukseflux.

Before using the LP02, please study:

• Section 2, Cautionary Statements

• Section 3, Initial Inspection

• Section 4, Quick Start

2. Cautionary Statements

• Although the LP02 is rugged, it is also a highly precise scientific

instrument and should be handled as such.

• Care should be taken when opening the shipping package to not damage or

cut the cable jacket. If damage to the cable is suspected, consult with a
Campbell Scientific application engineer.

3. Initial Inspection

• Upon receipt of the LP02, inspect the packaging and contents for damage.

File damage claims with the shipping company.

• The model number and cable length are printed on a label at the

connection end of the cable. Check this information against the shipping
documents to ensure the correct product and cable length are received.

• See Section 3.1, Ships With, to ensure that all of your parts are included.

3.1 Ships With

(1) Bolt for mounting from original manufacturer
(2) Nuts for mounting from original manufacturer
(1) Calibration certificate (see Section 3.2, Calibration Certificate)
(2) Bolts for mounting from original manufacturer
(1) ResourceDVD

3.2 Calibration Certificate

Included with the sensor is a calibration certificate with the sensor calibration
constant and serial number. Cross check this serial number against the serial
number on your LP02 to ensure that the given calibration constant corresponds
to your sensor.

1

LP02 Pyranometer

4. Quickstart

4.1 Siting Considerations

4.2 Mounting

Please review Section 7, Operation, for wiring, CRBasic programming, and
Edlog programming.

The LP02 is usually installed horizontally, but can also be installed at any
angle including an inverted position. In all cases, it will measure the flux that
is incident on the surface that is parallel to the sensor surface.

Site the LP02 to allow easy access for maintenance while ideally avoiding any
obstructions above the plane of the sensing element. It is important to mount
the LP02 such that a shadow will not be cast on it at any time. If this is not
possible, try to choose a site where any obstruction over the azimuth range
between earliest sunrise and latest sunset has an elevation not exceeding 5°.
Diffuse solar radiation is less influenced by obstructions near the horizon. For
instance, an obstruction with an elevation of 5° over the whole azimuth range
of 360° decreases the downward diffuse solar radiation by only 0.8%.

Below shows the steps for using the CM225 mounting bracket kit to mount the
LP02 to a vertical pipe (1.0 to 2.1 in. OD), or to a CM202, CM203, CM204, or
CM206 crossarm. If the sensor needs to be mounted at an angle, the CM245
Adjustable Angle Mounting Stand can be used instead (see Appendix A,
CM245 Adjustable Angle Mounting Stand).

1. Attach the CM225 to a mast or crossarm (see FIGURE 4-1 and FIGURE

4-2).

2

FIGURE 4-1. CM225 Bracket Attached to a Crossarm

LP02 Pyranometer

Mounting Hole

FIGURE 4-2. CM225 Bracket Attached to a Mast

2. Place the LP02 in the center of the CM225 with the cable pointing to the

nearest magnetic pole, and align the sensor’s mounting holes with two of
the bracket’s mounting holes (see FIGURE 4-3 and FIGURE 4-4).

FIGURE 4-3. LP02 Mounting Hole

3