Campbell Scientific CS106 User Manual

INSTRUCTION MANUAL

CS106 Barometric

Copyright © 1995- 2014

Campbell Scientific, Inc.

Pressure Sensor

Revision: 9/14

Limited Warranty

“Products manufactured by CSI are warranted by CSI to be free from defects in
materials and workmanship under normal use and service for twelve months
from the date of shipment unless otherwise specified in the corresponding
product manual. (Product manuals are available for review online at

www.campbellsci.com.) Products not manufactured by CSI, but that are resold

by CSI, are warranted only to the limits extended by the original manufacturer.
Batteries, fine-wire thermocouples, desiccant, and other consumables have no
warranty. CSI’s obligation under this warranty is limited to repairing or
replacing (at CSI’s option) defective Products, which shall be the sole and
exclusive remedy under this warranty. The Customer assumes all costs of
removing, reinstalling, and shipping defective Products to CSI. CSI will return
such Products by surface carrier prepaid within the continental United States of
America. To all other locations, CSI will return such Products best way CIP
(port of entry) per Incoterms ® 2010. 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 CSI such as programming to customer specifications, electrical
connections to Products manufactured by CSI, and Product specific training, is
part of CSI's product warranty. CSI EXPRESSLY DISCLAIMS AND

EXCLUDES ANY IMPLIED WARRANTIES OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. CSI hereby disclaims,
to the fullest extent allowed by applicable law, any and all warranties and
conditions with respect to the Products, whether express, implied or
statutory, other than those expressly provided herein.”

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.

Precautions

DANGER — MANY HAZARDS ARE ASSOCIATED WITH INSTALLING, USING, MAINTAINING, AND WORKING ON OR AROUND

TRIPODS, TOWERS, AND ANY ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS, CROSSARMS, ENCLOSURES,
ANTENNAS, ETC. FAILURE TO PROPERLY AND COMPLETELY ASSEMBLE, INSTALL, OPERATE, USE, AND MAINTAIN TRIPODS,

TOWERS, AND ATTACHMENTS, AND FAILURE TO HEED WARNINGS, INCREASES THE RISK OF DEATH, ACCIDENT, SERIOUS
INJURY, PROPERTY DAMAGE, AND PRODUCT FAILURE. TAKE ALL REASONABLE PRECAUTIONS TO AVOID THESE HAZARDS.
CHECK WITH YOUR ORGANIZATION'S SAFETY COORDINATOR (OR POLICY) FOR PROCEDURES AND REQUIRED PROTECTIVE
EQUIPMENT PRIOR TO PERFORMING ANY WORK.

Use tripods, towers, and attachments to tripods and towers only for purposes for which they are designed. Do not exceed design
limits. Be familiar and comply with all instructions provided in product manuals. Manuals are available at www.campbellsci.com or
by telephoning [phone] (USA). You are responsible for conformance with governing codes and regulations, including safety
regulations, and the integrity and location of structures or land to which towers, tripods, and any attachments are attached. Installation
sites should be evaluated and approved by a qualified engineer. If questions or concerns arise regarding installation, use, or
maintenance of tripods, towers, attachments, or electrical connections, consult with a licensed and qualified engineer or electrician.

General

• Prior to performing site or installation work, obtain required approvals and permits. Comply

with all governing structure-height regulations, such as those of the FAA in the USA.

• Use only qualified personnel for installation, use, and maintenance of tripods and towers, and

any attachments to tripods and towers. The use of licensed and qualified contractors is
highly recommended.

• Read all applicable instructions carefully and understand procedures thoroughly before

beginning work.

• Wear a hardhat and eye protection, and take other appropriate safety precautions while

working on or around tripods and towers.

• Do not climb tripods or towers at any time, and prohibit climbing by other persons. Take

reasonable precautions to secure tripod and tower sites from trespassers.

• Use only manufacturer recommended parts, materials, and tools.

Utility and Electrical

• You can be killed or sustain serious bodily injury if the tripod, tower, or attachments you are

installing, constructing, using, or maintaining, or a tool, stake, or anchor, come in contact
with overhead or underground utility lines.

• Maintain a distance of at least one-and-one-half times structure height, 20 feet, or the

distance required by applicable law, whichever is greater, between overhead utility lines and
the structure (tripod, tower, attachments, or tools).

• Prior to performing site or installation work, inform all utility companies and have all

underground utilities marked.

• Comply with all electrical codes. Electrical equipment and related grounding devices should

be installed by a licensed and qualified electrician.

Elevated Work and Weather

• Exercise extreme caution when performing elevated work.

• Use appropriate equipment and safety practices.

• During installation and maintenance, keep tower and tripod sites clear of un-trained or non-

essential personnel. Take precautions to prevent elevated tools and objects from dropping.

• Do not perform any work in inclement weather, including wind, rain, snow, lightning, etc.

Maintenance

• Periodically (at least yearly) check for wear and damage, including corrosion, stress cracks,

frayed cables, loose cable clamps, cable tightness, etc. and take necessary corrective actions.

• Periodically (at least yearly) check electrical ground connections.

WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS,
THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR
MAINTENANCE OF TRIPODS, TOWERS, OR ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS, CROSSARMS,
ENCLOSURES, ANTENNAS, ETC.

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

4. Quickstart .................................................................... 1

5. Overview ...................................................................... 4

6. Specifications ............................................................. 4

6.1 Operating Range .................................................................................. 4

6.2 Accuracy .............................................................................................. 5

6.3 General ................................................................................................. 5

7. Installation ................................................................... 6

7.1 Jumper Settings .................................................................................... 6

7.2 Mounting in the Enclosure ................................................................... 6

7.3 Wiring .................................................................................................. 8

7.3.1 Datalogger Connection ................................................................. 8

7.3.2 5-pin Screw Terminal Plug Connector .......................................... 9

7.4 Programming ...................................................................................... 10

7.4.1 CRBasic Instructions .................................................................. 10

7.4.2 Edlog Instructions ....................................................................... 10

8. Operation ................................................................... 11

8.1 Multiplier and Offset Calculation ...................................................... 11

8.2 Conversion Factors ............................................................................ 12

8.3 Long Lead Lengths ............................................................................ 12

8.4 Output Resolution .............................................................................. 12

8.5 Correcting Pressure to Sea Level ....................................................... 13

9. Maintenance and Calibration ................................... 13

Appendices

Importing Short Cut Code Into CRBasic Editor ... A-1

A.

A.1 Importing Short Cut Code into a Program Editor ........................... A-1

A.1.1 CRBasic Datalogger................................................................. A-1

A.1.2 Edlog ........................................................................................ A-2

i

Table of Contents

B. Example Programs .................................................. B-1

B.1 CRBasic Programs .......................................................................... B-1

B.1.1 Example CR1000 Program Using Sequential Mode ................ B-1

B.1.2 Example CR1000 Program Using Pipeline Mode .................... B-2

B.2 Edlog Program................................................................................. B-3

Figures

7-1. CS106 jumper set to shutdown mode .................................................. 6

7-2. ENC100 is a very small enclosure that can house one CS106 ............ 7

7-3. CS106 wiring diagram......................................................................... 8

7-4. Connector key attached to 5-pin screw terminal plug connector ......... 9

8-1. Point slope graph ............................................................................... 11

Tables

7-1. Signal and Ground Connectors for CS106 .......................................... 9

8-1. Conversion Factors for Alternative Pressure Units ........................... 12

ii

CS106 Barometric Pressure Sensor

1. Introduction

The CS106 measures barometric pressure for the range of 500 to 1100 mb.
This range equates to from below sea level (as in a mine) to over 15,000 feet
above sea level. Designed for use in environmental applications, the CS106 is
compatible with all Campbell Scientific dataloggers.

2. Cautionary Statements

• READ AND UNDERSTAND the Precautions section at the front of this

manual.

• Warning: Failure to protect the sensor from condensation may result in

permanent damage.

• Warning: Improper wiring may damage the CS106 beyond repair.

• 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.

• Although the CS106 is rugged, it should be handled as a precision

scientific instrument.

3. Initial Inspection

• Upon receipt of the CS106, inspect the packaging and contents for

damage. File damage claims with the shipping company.

4. Quickstart

Short Cut is an easy way to program your datalogger to measure the CS106 and
assign datalogger wiring terminals. Use the following procedure to get started.

1. Install Short Cut by clicking on the install file icon. Get the install file

from either www.campbellsci.com, the ResourceDVD, or find it in
installations of LoggerNet, PC200W, PC400, or RTDAQ software.

2. The Short Cut installation should place a Short Cut icon on the desktop of

your computer. To open Short Cut, click on this icon.

1

CS106 Barometric Pressure Sensor

3. When Short Cut opens, select New Program.

4. Select Datalogger Model and Scan Interval (default of 5 seconds is OK

for most applications). Click Next.

2

CS106 Barometric Pressure Sensor

5. Under the Available Sensors and Devices list, select Sensors |

Meteorological | Barometric Pressure folder. Select CS106 Barometric

Pressure Sensor. Click to move the selection to the Selected device

window. Enter the Sea Level Elevation Correction. The default units
for the sea level elevation correction is meters; this can be changed by
clicking on the Elevation Correction Units box and selecting Feet.
Defaults for the barometric pressure measurement and frequency of the
measurement are mmHg and Hourly, consecutively. These can be
changed by clicking the Barometric Pressure and Measure sensor boxes
and selecting different values.

6. After selecting the sensor, click at the left of the screen on Wiring

Diagram to see how the sensor is to be wired to the datalogger. The
wiring diagram can be printed out now or after more sensors are added.

3

CS106 Barometric Pressure Sensor

WARNING

7. Select any other sensors you have, then finish the remaining Short Cut

8. If LoggerNet, PC400, RTDAQ, or PC200W is running on your PC, and the

9. If the sensor is connected to the datalogger, as shown in the wiring

Improper wiring may damage the CS106 beyond repair.

5. Overview

The CS106 uses Vaisala’s Barocap® silicon capacitive pressure sensor, which
has been designed for accurate and stable measurement of barometric pressure.
This barometer is encased in a plastic shell (ABS/PC blend) fitted with an
intake valve for pressure equalization.

steps to complete the program. The remaining steps are outlined in Short

Cut Help, which is accessed by clicking on Help | Contents |
Programming Steps.

PC to datalogger connection is active, you can click Finish in Short Cut
and you will be prompted to send the program just created to the
datalogger.

diagram in step 6, check the output of the sensor in the datalogger support
software data display to make sure it is making reasonable measurements.

The CS106 outputs a linear 0 to 2.5 Vdc signal that corresponds to 500 to 1100
mb. It can be operated in a shutdown or normal mode (see Section 7.1, Jumper
Settings). In the shutdown mode, the datalogger switches 12 Vdc power to the
barometer during the measurement. The datalogger then powers down the
barometer between measurements to conserve power.

If the CS106 and datalogger will be housed in different enclosures, the
CABLE5CBL-L should be used instead of the cable that is shipped with the
CS106. The CABLE5CBL-L can terminate in:

6. Specifications

Features:

• Pigtails that connect directly to a Campbell Scientific datalogger

(option –PT)

• Connector that attaches to a prewired enclosure (option –PW). Refer

to www.campbellsci.com/prewired-enclosures for more information.

• Integral switching circuit limits power consumption to measurement

cycle

• Compatible with Campbell Scientific CRBasic dataloggers:

CR200(X) series, CR800 series, CR1000, CR3000, CR5000, and
CR9000(X). Also compatible with Edlog dataloggers: CR500,
CR510, CR10(X), CR23X, CR7, and 21X

4

6.1 Operating Range

Pressure: 500 mb to 1100 mb

Temperature: –40 to +60 °C

Humidity: non-condensing

6.2 Accuracy

CS106 Barometric Pressure Sensor

Total Accuracy***: ±0.3 mb @ +20 °C
±0.6 mb @ 0 to +40 °C
±1 mb @ –20 to +45 °C
±1.5 mb @ –40 to +60 °C

Linearity*: ±0.25 mb @ 20 °C

Hysteresis*: ±0.03 mb @ 20 °C

Repeatability*: ±0.03 mb @ 20 °C

Calibration Uncertainty**: ±0.15 mb @ 20 °C

Long-Term Stability: ±0.1 mb per year

* Defined as ±2 standard deviation limits of end-point non-linearity,

hysteresis error, or repeatability error

** Defined as ±2 standard deviation limits of inaccuracy of the working

standard at 1000 mb in comparison to international standards (NIST)

6.3 General

*** Defined as the root sum of the squares (RSS) of end-point non-linearity,

hysteresis error, repeatability error and calibration uncertainty at room
temperature

Dimensions: 9.7 x 6.8 x 2.8 cm (3.8 x 2.7 x 1.1 in)

Weight: 90 g (3.2 oz)

Housing Material: ABS/PC blend

Supply Voltage: 10 to 30 Vdc

Supply Voltage Control: When the internal jumper is closed, the CS106

is on continually. When the jumper is open,
the CS106 can be turned on/off with 5 Vdc/
0 Vdc.

Supply Voltage Sensitivity: negligible

Current Consumption: <4 mA (active); <1 µA (quiescent)

Output Voltage: 0 to 2.5 Vdc

Warm Up Time: 1 s

Pressure Fitting: barbed fitting for 1/8 in I.D. tubing

Overpressure Limit: 2000 mb

5

CS106 Barometric Pressure Sensor

NOTE

CAUTION

Jumper

7. Installation

7.1 Jumper Settings

The CS106 can be operated in one of two modes: shutdown and normal. The
mode is selected by a jumper located underneath the plastic cover of the
barometer. When the jumper is not installed, the CS106 is in shutdown mode
and the datalogger turns the CS106 on and off with a control port or excitation
channel; to use the excitation channel, the datalogger must be able to provide
an excitation voltage of 5 Vdc. When the jumper is installed, the CS106 is in
normal mode and powered continuously.

CS106s shipped from Campbell Scientific are configured for
shutdown mode (jumper open).

The location of the jumper is shown in FIGURE 7-1.

6

FIGURE 7-1. CS106 jumper set to shutdown mode

7.2 Mounting in the Enclosure

To prevent condensation, install the sensor in an environmentally protected
enclosure, complete with desiccant, which should be changed at regular
intervals.

Failure to protect the sensor from condensation may result
in permanent damage.

The CS106 is typically mounted in a Campbell Scientific enclosure next to the
datalogger. Campbell Scientific also offers the ENC100 for situations where it
is desirable to house the CS106 in its own enclosure (see FIGURE 7-2). The
ENC100 is a 6.7-in. x 5.5-in. x 3.7-in. enclosure that includes a compression
fitting for cable entry, a vent for equalization with the atmosphere, a backplate

CS106 Barometric Pressure Sensor

NOTE

for mounting the CS106, and hardware for mounting the ENC100 to a tripod,
tower, or pole.

FIGURE 7-2. ENC100 is a very small enclosure that can house one

CS106

Remember that for the sensor to detect the external ambient pressure, the
enclosure must vent to the atmosphere (i.e., not be “hermetically sealed”).
Enclosures purchased from Campbell Scientific properly vent to the
atmosphere.

For user-supplied enclosures, it may be necessary to make a vent
hole on the outer wall. In this situation, do not make the hole on
one of the vertical side walls, as wind blowing around it can cause
transient changes in pressure.

The mounting holes for the sensor are one-inch-centered (three inches apart),
and will mount directly onto the holes on the backplate of Campbell Scientific
enclosures. Mount the sensor with the pneumatic connector pointing vertically
downwards to prevent condensation collecting in the pressure cavity, and also
to ensure that water cannot enter the sensor.

7

CS106 Barometric Pressure Sensor

See Table 3-1 Blue – Pressure (VOUT)

See Table 3-1 Yellow – Signal Ground (AGND)

Continuous 12 VDC Red – 12 VDC (SUPPLY)

See Table 3-1 Black – Power Ground (GND)

Control Port or Excitation Channel Green – Control (EXT. TRIG)

Ground or Analog Ground Clear – Shield (G or AGND)

See TABLE 7-1

1

Continuous 12 Vdc

1

Control Port or Excitation Channel

Ground or Analog Ground

7.3 Wiring

7.3.1 Datalogger Connection

Before connecting the barometer to the datalogger, a yellow warning label
must be removed from the pigtails. The warning label reminds the user of the
importance of properly connecting the barometer to the datalogger. Wiring is
shown in FIGURE 7-3 and TABLE 7-1.

See TABLE 7-

See TABLE 7-

FIGURE 7-3. CS106 wiring diagram

8

CS106 Barometric Pressure Sensor

TABLE 7-1. Signal and Ground Connectors for CS106

Datalogger

Datalogger

Yellow

AGND

AG (CR10(X), CR500, CR510)

Low Side of Diff. Input

WARNING

WARNING

Wire

Blue VOUT S.E. Input High Side of Diff Input

Black GND

Green EXT TRIG

Red SUPPLY 12 Vdc 12 Vdc

Shield Shield

CS106 Terminal

Improper wiring may damage the CS106 beyond repair.

Single-Ended Measurement

(Other Dataloggers)

(21X, CR7, CR9000(X))

G (Other Dataloggers)

Control port (use to turn power
on/off)

G (CR10(X), CR500, CR510)

(Other Dataloggers)

Differential Measurement

(21X, CR7, CR9000(X))

G (Other Dataloggers)

Control port (use to turn power
on/off)

G (CR10(X), CR500, CR510)

(Other Dataloggers)

7.3.2 5-pin Screw Terminal Plug Connector

The datalogger connects to the CS106 via a 5-pin screw terminal plug
connector. This connector is removable and may be replaced. The
replacement connector may come with a connector key attached to it to ensure
that the connector is plugged into the CS106 right side up (see FIGURE 7-4).
When the connector is right side up, it will easily plug into the barometer.

FIGURE 7-4. Connector key attached to 5-pin screw terminal plug

connector

A 5-pin screw terminal that is plugged in upside down
will damage the sensor — perhaps beyond repair.

9

CS106 Barometric Pressure Sensor

NOTE

7.4 Programming

Short Cut is the best source for up-to-date datalogger programming code.
Programming code is needed,

If your data acquisition requirements are simple, you can probably create and
maintain a datalogger program exclusively with Short Cut. If your data
acquisition needs are more complex, the files that Short Cut creates are a great
source for programming code to start a new program or add to an existing
custom program.

Short Cut cannot edit programs after they are imported and edited
in CRBasic Editor.

A Short Cut tutorial is available in Section 4, Quickstart. If you wish to import
Short Cut code into either Edlog or CRBasic Editor to create or add to a
customized program, follow the procedure in Appendix A, Importing Short Cut
Code into CRBasic Editor. Programming basics for CRBasic and Edlog
dataloggers are provided in the following sections; more detailed information
about multiplier and offset calculations, conversion factors, long cable lengths,
resolution, and correcting pressure to sea level is provided in Section 8,
Operation. Complete program examples for select dataloggers can be found in
Appendix B, Example Programs.

• when creating a program for a new datalogger installation

• when adding sensors to an existing datalogger program

7.4.1 CRBasic Instructions

The VoltSE() measurement instruction programs CRBasic dataloggers
(CR200(X), CR800-series, CR1000, CR3000, CR5000, CR9000(X)) to
measure the CS106.

VoltSE( Dest, Reps, Range, SEChan, MeasOff, SettlingTime, Integ

Multiplier, Offset )

At sea level, a multiplier of 0.24 and an offset of 500 will report the barometric
pressure in mbar or hPa. The offset will need to be adjusted if the barometer is
not at sea level (see Section 8.5, Correcting Pressure to Sea Level). If different
barometric pressure units are desired, see Section 8.2, Conversion Factors.

Often, the TimeIntoInterval() CRBasic instruction is used to only power the
barometer while making the measurements. Atmospheric pressure changes
little with time. In most weather station applications, measuring the barometer
pressure once an hour is adequate. See Appendix B, Example Programs, for
more information.

7.4.2 Edlog Instructions

The Volt (SE) (P1) measurement instruction programs Edlog dataloggers
(CR500, CR510, CR10(X), CR23X, CR7, and 21X) to measure the CS106.

ration,

10

8. Operation

8.1 Multiplier and Offset Calculation

CS106 Barometric Pressure Sensor

Volt (SE) (P1)
1: 1 Reps
2: 25 2500 mV 60 Hz Rejection Range
3: 1 SE Channel
4: 1 Loc [ CS106 ]
5: 0.240 Multiplier
6: 500 Offset

At sea level, a multiplier of 0.24 and an offset of 500 will report the barometric
pressure in mbar or hPa. The offset will need to be adjusted if the barometer is
not at sea level (see Section 8.5, Correcting Pressure to Sea Level). If different
barometric pressure units are desired, see Section 8.2, Conversion Factors.

Often, the If time is (P92) Edlog instruction is used to only power the
barometer while making the measurements. Atmospheric pressure changes
little with time. In most weather station applications, measuring the barometer
pressure once an hour is adequate. See Appendix B, Example Programs, for
more information.

The multiplier and offset in the VoltSE() CRBasic or Volt (SE) (P1) Edlog
instruction convert millivolts to millibar or hPa. The output from the sensor is
0 to 2.5 V or 0 to 2500 mV, and the sensor’s operating range is from 500 to
1100 mbars (hPa). Equation 1 uses these values to calculate the multiplier:

Multiplier: m =

1100−500

2500−0

600

=

= 0.25 (1)

2500

The offset is the barometric value at sea level (see Equation 2).

Offset: o = 500 (mbar or hPa )

The final result according to FIGURE 8-1 is:

y = 0.24



+ 500 mbar (2)



FIGURE 8-1. Point slope graph

11

CS106 Barometric Pressure Sensor

TABLE 8-1. Conversion Factors for

8.2 Conversion Factors

In the example programs, the pressure is reported in millibars (mb). To report
pressure in different units, multiply the measured pressure by the appropriate
conversion factor. This is done by including an expression in a CRBasic
program or using Z=X*F (P37) in an Edlog program. See TABLE 8-1 below
for conversion factors.

To find Multiply by

hPa or mb 1.0

kPa 0.1

mm of Hg 0.75006

in of Hg 0.02953

Psi 0.0145

Atm 0.00099

Alternative Pressure Units

Torr 0.75006

8.3 Long Lead Lengths

There is a 0.06 mV/foot voltage drop in the CS106 signal leads. This voltage
drop, in long lead lengths, will raise the barometric reading by approximately

1.44 mb per 100 feet.

For lead lengths greater than 20 feet, use the differential instruction (VoltDiff()
in CRBasic or Volt (DIFF) (P2) in Edlog) to measure the CS106.

8.4 Output Resolution

When storing the values from the CS106 to a datalogger’s final storage
location, or to a data table, care must be taken to choose suitable scaling of the
reading, or to store the value with adequate resolution to avoid losing useful
resolution of the pressure measurement. The default resolution (low
resolution) for Campbell Scientific dataloggers is limited to a maximum of four
digits. Even then, the maximum digit value that can be displayed is 7999 for
the CRBasic dataloggers and 6999 for Edlog dataloggers. If you use this
option with barometric data scaled in millibars (hPa), a reading above

799.9 mb for CRBasic dataloggers (699.9 mb for Edlog dataloggers) will lose
one digit of resolution (e.g., at 900 mb, the resolution is limited to 1 mb).

To retain 0.01 mb resolution, you either need to subtract a fixed offset from the
reading before it is stored to avoid exceeding the 799.9 for CRBasic
dataloggers (699.9 for Edlog dataloggers) threshold, or output the barometric
reading in high resolution format. This can be done by using the IEEE4 format
for CRBasic dataloggers or the Resolution (P78) instruction in the Edlog
dataloggers. The default data output format for CR200(X) series datalogger is
IEEE4.

12

8.5 Correcting Pressure to Sea Level

dP

E

= − −





























1013 25 1

1

44307

69231

5.25328

.

.

E m

E ft

ft m

( )

( )

.=3 281

CAUTION

The weather service, most airports, radio stations, and television stations adjust
the atmospheric pressure to a common reference (sea level). Equation 3 can be
used to find the difference in pressure between the sea level and the site. That
value (dP) is then added to the offset (500 mb in our example programs) in the
measurement instruction. U. S. Standard Atmosphere and dry air were
assumed when Equation 3 was derived (Wallace, J. M. and P. V. Hobbes,
1977: Atmospheric Science: An Introductory Survey, Academic Press,
pp. 59-61).

The value dP is in millibars and the site elevation, E, is in meters. Add dP
value to the offset in the measurement instruction.

Use Equation 4 to convert feet to meters.

(4)

CS106 Barometric Pressure Sensor

(3)

The corrections involved can be significant: e.g., at 1000 mb and 20 °C,
barometric pressure will decrease by 1.1 mb for every 10 meter increase in
altitude.

9. Maintenance and Calibration

Since the sensor is semi-sealed, minimum maintenance is required:

1. Visually inspect the cable connection to ensure it is clean and dry.

2. Visually inspect the casing for damage.

3. Ensure that the pneumatic connection and pipe are secure and undamaged.

The external case can be cleaned with a damp, lint-free cloth and a mild
detergent solution.

Vaisala recommends recalibration every two years under normal use. In areas
where a lot of contaminants are present, recalibration every year is
recommended.

Contact Campbell Scientific, Inc. ([phone]) for an RMA number before
returning the sensor for recalibration.

Should you lose the five terminal connector (pn 16004), the replacement part
can be purchased from Campbell Scientific, Inc. Contact Campbell Scientific,
Inc. to purchase the part.

The CS106 is sensitive to static when the backplate is
removed. To avoid damage, take adequate anti-static
measures when handling.

13

CS106 Barometric Pressure Sensor

14

Appendix A. Importing Short Cut Code Into CRBasic Editor

This tutorial shows:

• How to import a Short Cut program into a program editor for

additional refinement.

• How to import a wiring diagram from Short Cut into the comments of

a custom program.

A.1 Importing Short Cut Code into a Program Editor

Short Cut creates files that can be imported into either CRBasic Editor or
Edlog program editor. These files normally reside in the

C:\campbellsci\SCWin folder and have the following extensions:

• .DEF (wiring and memory usage information)

• .CR2 (CR200(X) datalogger code)

• .CR1 (CR1000 datalogger code)

• .CR8 (CR800 datalogger code)

• .CR3 (CR3000 datalogger code)

• .CR5 (CR5000 datalogger code)

• .CR9 (CR9000(X) datalogger code)

• .DLD (contain code for CR10(X), CR23X, CR500, CR510, 21X, or

CR7(X) dataloggers)

The following procedures show how to import these files for editing.

A.1.1 CRBasic Datalogger

Use the following procedure to import Short Cut code into CRBasic Editor
(CR200(X), CR1000, CR800, CR3000, CR5000 dataloggers).

1. Create the Short Cut program following the procedure in Section 4,
Quickstart. Finish the program and exit Short Cut. Make note of the file
name used when saving the Short Cut program.

2. Open CRBasic Editor.

3. Click File | Open. Assuming the default paths were used when Short Cut
was installed, navigate to C:\CampbellSci\SCWin folder. The file of
interest has a “.CR2”, “.CR1”, “.CR8”, “.CR3”, “.CR5”, or “.CR9”
extension, for CR200(X), CR1000, CR800, CR3000, CR5000, or
CR9000(X) dataloggers, respectively. Select the file and click Open.

4. Immediately save the file in a folder different from \Campbellsci\SCWin,
or save the file with a different file name.

A-1

Appendix A. Importing Short Cut Code Into CRBasic Editor

NOTE
NOTE

Once the file is edited with CRBasic Editor, Short Cut can no
longer be used to edit the datalogger program. Change the name
of the program file or move it, or Short Cut may overwrite it next
time it is used.

5. The program can now be edited, saved, and sent to the datalogger.

6. Import wiring information to the program by opening the associated .DEF
file. Copy and paste the section beginning with heading “-Wiring for
CRXXX–” into the CRBasic program, usually at the head of the file.
After pasting, edit the information such that a ' character (single quotation
mark) begins each line. This character instructs the datalogger compiler to
ignore the line when compiling the datalogger code.

A.1.2 Edlog

Use the following procedure to import Short Cut code into the Edlog program
editor (CR10(X), CR500, CR510, CR23X, CR7, or 21X dataloggers).

1. Create the Short Cut program following the procedure in Section 4,
Quickstart. Finish the program and exit Short Cut. Make note of the file
name used when saving the Short Cut program.

2. Open Edlog.

3. Click File | Document DLD File. Assuming the default paths were used
when Short Cut was installed, navigate to C:\CampbellSci\SCWin folder.
The file of interest has a “.DLD” extension. Select the file and click
Open. The .dld file, which is a type of ASCII machine code, is imported,
documented, and, when saved, given a “.CSI” extension.

4. Immediately save the file in a folder different from \Campbellsci\SCWin,
or save the file with a different file name.

Once the file is edited with Edlog, Short Cut can no longer be used
to edit the program. Change the name of the program file or move
it, or Short Cut may overwrite it.

5. The program can now be edited, saved, and sent to the datalogger.

6. Import wiring information to the program by opening the associated .DEF
file. Copy and paste the section beginning with heading “-Wiring for
CRXXX–” into the Edlog program, usually at the head of the file. After
pasting, edit the information such that a ; (semicolon) begins each line,
which instructs the datalogger compiler to ignore the line when compiling
the datalogger code.

A-2

Appendix B. Example Programs

B.1 CRBasic Programs

B.1.1 Example CR1000 Program Using Sequential Mode

This CR1000 program uses the sequential mode, which is the simplest mode
and can be used for most meteorological applications. Although the example is
for the CR1000, other CRBasic dataloggers, such as the CR200(X), CR800,
CR850, CR3000, and CR9000(X) are programmed similarly.

In the example, the CR1000 measures the CS106 once an hour. To do this, the
CR1000 uses a control port to turn on the CS106 one minute before the top of
the hour. On the hour, the datalogger measures the CS106, and then turns the
CS106 off. This example assumes that the jumper is in the default position
(open).

'CR1000

'Declare Variables and Units
Public BattV
Public PTemp_C
Public BP
Public BP_mmHg

Units BattV=Volts
Units PTemp_C=Deg C
Units BP = hPa
Units BP_mmHg=mmHg

'Define Data Tables
DataTable(Table1,True,-1)
DataInterval(0,60,Min,10)
Sample(1,BP_mmHg,FP2)
EndTable

DataTable(Table2,True,-1)
DataInterval(0,1440,Min,10)
Minimum(1,BattV,FP2,False,False)
EndTable

'Main Program
BeginProg
'Main Scan
Scan(5,Sec,1,0)
'Default Datalogger Battery Voltage measurement 'BattV'
Battery(BattV)
'Default Wiring Panel Temperature measurement 'PTemp_C'
PanelTemp(PTemp_C,_60Hz)
'CS106 Barometric Pressure Sensor measurement 'BP_mmHg'
If TimeIntoInterval(59,60,Min) Then PortSet(1,1)
If TimeIntoInterval(0,60,Min) Then
VoltSe(BP,1,mV2500,1,1,0,_60Hz,0.240,500)
BP_mmHg=BP*0.75006
PortSet(1,0)
EndIf
'Call Data Tables and Store Data
CallTable(Table1)
CallTable(Table2)
NextScan
EndProg

B-1

Appendix B. Example Programs

B.1.2 Example CR1000 Program Using Pipeline Mode

'CR1000 Datalogger

Public CS106_temp, pressure
Units pressure = mbar

DataTable (met_data,True,-1)
DataInterval (0,60,min,10)
Sample (1,pressure,IEEE4)
EndTable

BeginProg
PipeLineMode
Scan (1,sec,3,0)

'Measurement is made every scan outside the "If" statement
VoltSE (CS106_temp,1,mV2500,1,False,0,_60Hz,0.240,500)

'Turn on CS106 one minute before the hour
If (TimeIntoInterval (59,60,min)) Then WriteIO (&b1000,&b1000)

'Copy the correct value to a current variable called "pressure" at the top of the hour
'Turn off CS106 after the measurement
If (TimeIntoInterval (0,60,min)) Then
pressure = CS106_temp
WriteIO (&b1000,&b0)
EndIf

CallTable met_data

NextScan
EndProg

Although this example is for the CR1000, other CRBasic dataloggers, such as
the CR200(X), CR800, CR850, CR3000, and CR9000(X) are programmed
similarly. In the example, the CR1000 measures the CS106 once an hour in a
program that runs at 1 Hz. In order to keep the CR1000 running in a pipeline
mode, the measurement instruction is placed outside the “If” statement. The
measurement is made every scan, and the measured value is first written into a
temporary variable called "CS106_temp". Once the CS106 is turned on one
minute before the hour, the CS106 starts to make the correct pressure
measurements. At the top of the hour, the correct value is copied into the
current variable called “pressure”, and the sensor is turned off immediately.

The program’s integration parameter for the VoltSE() instruction is _60Hz.
However, for Eddy Covariance programs or other datalogger programs that are
executed at a higher frequency, the integration parameter should be 250 µs
instead of _60Hz or _50Hz. This prevents skipped scans.

B-2

B.2 Edlog Program

Although this example is for the CR10X, other Edlog dataloggers, such as the
CR510, CR23X, 21X, and CR7, are programmed similarly. In the example,
the CR10X turns on the CS106 one minute before the top of the hour using a
control port. On the hour the datalogger measures the CS106, and then it turns
the CS106 off.

;{CR10X}

*Table 1 Program
01: 1 Execution Interval (seconds)

;Turn on CS106 one minute before the hour
;
1: If time is (P92)
1: 59 Minutes (Seconds --) into a
2: 60 Interval (same units as above)
3: 41 Set Port 1 High

;Measure CS106 at the top of the hour
;
2: If time is (P92)
1: 0 Minutes (Seconds --) into a
2: 60 Interval (same units as above)
3: 30 Then Do

3: Volt (SE) (P1)
1: 1 Reps
2: 25 2500 mV 60 Hz Rejection Range
3: 1 SE Channel
4: 1 Loc [ CS106 ]
5: 0.240 Multiplier
6: 500 Offset

;Turn off CS106
;
4: Do (P86)
1: 51 Set Port 1 Low

5: End (P95)

;Store CS106 data once an hour
;
6: If time is (P92)
1: 0 Minutes (Seconds --) into a
2: 60 Interval (same units as above)
3: 10 Set Output Flag High (Flag 0)

7: Real Time (P77)
1: 0110 Day,Hour/Minute (midnight = 0000)

;Store in high resolution mode to retain 0.01 mb resolution
;
8: Resolution (P78)
1: 1 High Resolution

9: Sample (P70)
1: 1 Reps
2: 1 Loc [ CS106 ]

*Table 2 Program
01: 0 Execution Interval (seconds)

Appendix B. Example Programs

B-3

Appendix B. Example Programs

*Table 3 Subroutines

End Program

-Input Locations­1 CS106 1 1 1

B-4

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

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