Decagon Devices SC-1 Manual de usuario

L e a f P o r o m e t e r

Operator’s Manual

Version 8

Decagon Devices, Inc.

2365 NE Hopkins Court

Pullman, WA 99163

Tel: (5 9) 332-2756

Fax: (5 9) 332-5158

www.decagon.com

Trademarks:

“Leaf Porometer” is a registered

trademark of Decagon Devices, Inc.

Leaf Porometer Operator’s Manual

Table of Contents

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

Customer Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Seller’s Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Repair Costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

. About the Leaf Porometer . . . . . . 4

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Overview of the Leaf Porometer . . . . . . . . . . . . . . . . . . . 5

Components of the Leaf Porometer . . . . . . . . . . . . . . . . . 5

Keyboard Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

The Sensor Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Setting the Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Calibration Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Manual Mode vs. Auto Mode . . . . . . . . . . . . . . . . . . . . . . 9

Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3. The Menus . . . . . . . . . . . . . . . . . . . 11

The Measurement Menu . . . . . . . . . . . . . . . . . . . . . . . . . 11

Measuring Small Leaves & Needles . . . . . . . . . . . . . . . . 13

Taking a Measurement in Auto Mode . . . . . . . . . . . . . . 13

Taking a Manual Mode Measurement . . . . . . . . . . . . . . . 15

Saving Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Averaging Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Measurement Troubleshooting . . . . . . . . . . . . . . . . . . . . 18

Measurement Precautions . . . . . . . . . . . . . . . . . . . . . . . . 19

The Data Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

The Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . 25

Leaf Porometer Operator’s Manual

4. Sensor Head Calibration . . . . . . 31

5. Leaf Porometer Utility . . . . . . . . 45

Downloading Your Data . . . . . . . . . . . . . . . . . . . . . . . . . 46

How Saved Data Are Organized . . . . . . . . . . . . . . . . . . . 48

Erasing Your Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Setting the Date and Time . . . . . . . . . . . . . . . . . . . . . . . . 5

Calibration Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Retrieving Leaf Porometer Information . . . . . . . . . . . . . 51

The Menus and Their Functions . . . . . . . . . . . . . . . . . . . 52

6. Leaf Porometer Theory . . . . . . . 58

Stomatal Conductance . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

How the Leaf Porometer Works . . . . . . . . . . . . . . . . . . . 58

7. Care and Maintenance . . . . . . . . 68

Changing the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Cleaning the Sensor Block . . . . . . . . . . . . . . . . . . . . . . . . 68

General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Upgrading Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

8. Troubleshooting . . . . . . . . . . . . . 75

Further Reading . . . . . . . . . . . . . . . 83

CE Compliance. . . . . . . . . . . . . . . . . 85

Appendix A - Send Feedback . . . . 86

Leaf Porometer Operator’s Manual

1. Introduction

Thank you for purchasing Decagon Devices’ Leaf Porometer.

The Leaf Porometer is a device used to measure stomatal

conductance in leaves. This manual is designed to help you

understand the functions of your Leaf Porometer, make

high-quality stomatal conductance measurements, and help

you get the most out of your Leaf Porometer.

Customer Support

When contacting us, via fax or e-mail, include your Leaf

Porometer’s serial number (this can be found on the inside

of the battery cover), the firmware version you are currently

using, your name, address, phone and fax number, and a

description of your problem.

Phone:

United States/Canada (toll free): 1-800-755-2751.

Outside of the U.S./Canada: 1-509-332-2756.

Fax: 1-509-332-5158

E-Mail: s pport@decagon.com.

Warranty

The Leaf Porometer is covered by a standard, one-year war-

ranty on parts and labor, and is activated upon the arrival of

the instrument at your location.

Leaf Porometer Operator’s Manual

1. Introduction

Seller’s Liability

Seller warrants new equipment of its own manufacture

against defective workmanship and materials for a period of

one year from the date of receipt of equipment (the results

of ordinary wear and tear, neglect, misuse, accident and

excessive deterioration due to corrosion from any cause are

not considered to be a defect); but Seller’s liability for defec-

tive parts shall, in no event, exceed the furnishing of

replacement parts f.o.b. the factory where originally manu-

factured. Material and equipment covered hereby which is

not manufactured by the Seller shall be covered only by the

warranty of its manufacturer. Seller shall not be liable to

Buyer for loss, damage, or injuries to persons (including

death), or to property or things of whatsoever kind (includ-

ing, but not without limitation, loss of anticipated profits),

occasioned by or arising out of the installation, operation,

use, misuse, nonuse, repair, or replacement of said material

and equipment, or out of the use of any method or process

for which the same may be employed. The use of this

equipment constitute’s Buyer’s acceptance of the terms set

forth in this warranty. There are no understandings, repre-

sentations, or warranties of any kind, express, implied, stat-

utory or otherwise, (including, but not without limitation,

the implied warranties of merchantibility and fitness for a

particular purpose), not expressly set forth herein.

Repair Instructions

If your Leaf Porometer should ever require a repair, call

Decagon at (509) 332-2756 or 1-800-755-2751 (United

States and Canada). We will ask you for your address, phone

number, your Leaf Porometer’s serial number, and your cur-

rent firmware version. For non-warranty repairs, we will

also ask for a method of payment.

Leaf Porometer Operator’s Manual

1. Introduction

Before shipping yo r instr ment to Decagon, please

contact Decagon to obtain a Req est Maintenance

A thorization N mber (RMA). This will allow Decagon’s

repair staff to keep track of your porometer. Once you have

acquired an RMA, send your Leaf Porometer to Decagon.

Please include a document listing the complete shipping

address, name, and department of the person responsible

for the instrument, as well as a description of the problem.

This will better help our technicians and shipping depart-

ment to expedite repair on your Leaf Porometer, and ship it

back to you.

Please pack your Leaf Porometer carefully. Ship it back in

the carrying case, preferably inside a cardboard box. Ship to:

Decagon Devices Inc.

2365 NE Hopkins Co rt

P llman, WA 99163

Repair Costs

Manufacturer’s defects and instruments under warranty will

be repaired at no cost. For non-warranty repairs, costs for

parts, labor, and shipping will be billed to you.

Leaf Porometer Operator’s Manual

2. About the Leaf Porometer

. About the Leaf Porometer

The Leaf Porometer is a battery-operated, menu-driven

device used to measure stomatal conductance of leaves. Sto-

matal conductance is a function of the density, size, and

degree of opening, of stomata, which are pores in plants

that open to the outside air. The Leaf Porometer measures

stomatal conductance by putting the conductance of a leaf

in series with two known conductance elements, and com-

paring the humidity measurements between them. It can

display information in three selectable units:

• mmol/m

s (millimoles per meter squared

seconds)

• m

s/mol (meters squared seconds per mole)

• s/m (seconds per meter)

The first is a unit of conductance, while the other two are

units of resistance. To change between them, use the arrow

keys when taking a reading (see “Making a Measurement,”

pp. 16). They can also be altered by using the Units screen

under the Configuration Menu.

Specifications

Operating Environments: 5 - 4

C; - 9 % relative

humidity (non-condensing). NOTE: At temperatures less than

10° C, Automatic mode may experience errors, despite corrections

that have been made (See Chapter 3 more information about

Auto mode.)

Leaf Porometer Operator’s Manual

2. About the Leaf Porometer

Acc racy: 1 %

Sample Chamber Apert re: 6.35mm ( .25 in)

Meas rement Range: to 1 mmol/m

Microcontroller Dimensions: 15.8 x 9.5 x 3.3 cm (6.2 x

3.75 x 1.3 in)

Data Storage: 4 95 measurements

Data Retrieval: Direct via RS-232

Keypad: Six-key, menu-driven

Clock: 24-hour, +/- one minute per month

Interface Cable: RS-232 serial cable (included)

Power S pply: Four type “AA” batteries (included)

Overview of the Leaf Porometer

The Leaf Porometer features an easy-to-use, six-button,

menu-driven interface. There are three primary menus: the

Main Menu, Data Menu, and Configuration Menu (See

“Menus,” Chapter 3). You can navigate between each of

these by pressing the Menu button.

Components of the Leaf Porometer

The Leaf Porometer and its components come to you in a

foam-padded carrying case. You should find the following

items inside when your Leaf Porometer arrives:

• Leaf Porometer controller

• RS-232 cable

• Operator’s manual, including a CD-ROM with the

Leaf Porometer Utility

• Sensor head

• Teflon filter disks

• Replacement leaf pad/outer leaf pad (see p. 8)

Leaf Porometer Operator’s Manual

2. About the Leaf Porometer

• Calibration plate

• Bottle of distilled water

• Tweezers

• Calibration filter paper disks

Keyboard Functions

Here is a brief overview of each key’s function:

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