Decagon Devices SC-1 User manual
L e a f P o r o m e t e r
Operator’s Manual
Version 8
Leaf Porometer Operator’s Manual
i
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
ii
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
1
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
2
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
3
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
4
. 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
2
s (millimoles per meter squared
seconds)
• m
2
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
o
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
5
Acc racy: 1 %
Sample Chamber Apert re: 6.35mm ( .25 in)
Meas rement Range: to 1 mmol/m
2
s
1
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
6
• 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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