Campbell CS105 Manuel utilisateur

CS105/CS105M

Barometric Pressure Senso

Revision: 3/07

Campbell Scientific, Inc.

Warranty and Assistance

The CS105/CS105MD BAROMETRIC PRESSURE SENSOR is warranted

by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and

workmanship under normal use and service for twelve (12) months from date

of shipment unless specified otherwise. Batteries have no warranty.

CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to

repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective

products. The customer shall assume all costs of removing, reinstalling, and

shipping defective products to CAMPBELL SCIENTIFIC, INC. CAMPBELL

SCIENTIFIC, INC. will return such products by surface carrier prepaid. This

warranty shall not apply to any CAMPBELL SCIENTIFIC, INC. 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. CAMPBELL SCIENTIFIC, INC. is not liable for special,

indirect, incidental, or consequential damages.

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 (435) 753-2342. After an

applications 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

CAMPBELL SCIENTIFIC, INC. does not accept collect calls.

CS105/CS105MD 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 .........................................................................1

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

3. Installation and Wiring................................................2

4. Programming ...............................................................6

4.1 CS105MD.................................................................................................6

4.2 CS105 .......................................................................................................6

5. Long Lead Lengths......................................................9

6. Correcting Pressure to Sea Level ............................11

7. Maintenance...............................................................11

Appendix

A. Daily Average .......................................................... A-1

Figures

1. CS105 Mounted on the Backplate of an ENC12/14 Enclosure,

and Connected to a CR1000 Datalogger .................................................3

2. CS105MD Mounted on the Backplate of MetData1 Enclosure..................3

3. CS105 Wiring Diagram..............................................................................4

4. CS105MD Wiring Diagram........................................................................5

Tables

1. Signal and Ground Connectors for CS105 .................................................4

2. Conversion Factors for Alternative Pressure Units ....................................6

This is a blank page.

CS105/CS105MD Barometric Pressure

Sensor

1. General

The CS105 analog barometer uses Vaisala’s Barocap®silicon capacitive

pressure sensor. The Barocap sensor has been designed for accurate and stable

measurement of barometric pressure. The CS105 outputs a linear 0 to 2.5

VDC signal that corresponds to 600 to 1060 mb. It can be operated in a

powerup or continuous mode. In the powerup 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.

2. Specifications

Operating Range

Pressure: 600 mb to 1060 mb

Temperature: -40°C to +60°C

Humidity: non-condensing

Accuracy

Total Accuracy*** ±0.5 mb @ +20°C

±2 mb @ 0°C to +40°C

±4 mb @ -20°C to +45°C

±6 mb @ -40°C to +60°C

Linearity*: ±0.45 mb @ 20°C

Hysteresis*: ±0.05 mb @ 20°C

Repeatability*: ±0.05 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)

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

hysteresis error, repeatability error and calibration uncertainty at room

temperature

General

Dimensions: 9.7 cm x 5.9 cm x 2.1 cm (3.8” x 2.3” x 0.8”)

Weight: 110 g (4 oz)

Housing material: anodized aluminum

CS105/CS105MD Barometric Pressure Sensor

Supply Voltage: 10 to 30 VDC

Supply Voltage Control: When enabled with an internal jumper, the CS105 is

on continually. When disabled, the CS105 can be turned on/off with 5 VDC/0

VDC.

Supply voltage sensitivity: Less than 0.1 mb

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

Output Voltage: 0 to 2.5 VDC

Warm Up Time: 1 second

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

Overpressure limit: 2000 mb

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

3. Installation and Wiring

The CS105 can be operated in one of two modes: powerup and continuous.

The mode is selected by a jumper located underneath a black plug on the face

of the barometer. When the jumper is not installed, the CS105 is in powerup

mode and the datalogger turns the CS105 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

CS105 is powered continuously.

CS105s shipped from Campbell Scientific are configured for

powerup mode (jumper open).

NOTE

CS105MDs shipped from Campbell Scientific are configured for

continuous power mode (jumper closed).

NOTE

Mount the CS105 to the backplate in the same enclosure that the datalogger is

located in (Figures 1 and 2).

On the older (grey jacketed) cable pressure (VOUT) was brown

and signal ground (AGND) was white.

NOTE

CS105/CS105MD Barometric Pressure Sensor

FIGURE 1. CS105 Mounted on the Backplate of an ENC12/14 Enclosure,

and Connected to a CR1000 Datalogger

INTERNAL BATTERY

TEMPARARY BATTER

MADE IN USA

BPALK

12V ALKALINE BATTERY PACK

Logan, Utah

VAISALA

EXT.TRIG

AGND

GND

SUPPLY

VOUT

PRESSURE TRANSMITTER

MODEL

SERIAL NO

RANGE

OUTPUT

SUPPLY

PTB100A

P4450003

800-1060 hPa

0-5 VDC

10-30 VDC

MADE IN FINLAND

FIGURE 2. CS105MD Mounted on the Backplate of MetData1 Enclosure

CS105/CS105MD Barometric Pressure Sensor

VAISALA

EXT. TRIG

AGND

GND

SUPPLY

VOUT

PRESSURE TRANSMITTER

MODEL

SERIAL NO

RANGE

OUTPUT

SUPPLY

PTB101B

P4450003

600-1060 hPa

0-2.5 VDC

10-30 VDC

MADE IN FINLAND

See Table 1 Blue - Pressure (VOUT)

See Table 1 Yellow - Signal Ground (AGND)

Continuous 12 VDC Red - 12 VDC (SUPPLY)

See Table 1 Black - Power Ground (GND)

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

Ground Clear - Shield (SCREW ON CASE)

FIGURE 3. CS105 Wiring Diagram

TABLE 1. Signal and Ground Connectors for CS105

Single-Ended Measurement Differential Measurement

Blue S.E. Input, S.E. 7 (4H) High Side of Diff Input (4H)

Yellow AG (CR10(X), CR500, CR510)

(Other Dataloggers) Low Side of Diff. Input (4L)

Black (21X, CR7, CR9000(X))

G (Other Dataloggers) (21X, CR7, CR9000(X))

G (Other Dataloggers)

CS105/CS105MD Barometric Pressure Sensor

VAISALA

EXT. TRIG

AGND

GND

SUPPLY

VOUT

PRESSURE TRANSMITTER

MODEL

SERIAL NO

RANGE

OUTPUT

SUPPLY

PTB101B

P4450003

600-1060 hPa

0-2.5 VDC

10-30 VDC

MADE IN FINLAND

6H Green - Pressure (VOUT)

6L White - Signal Ground (AGND)

12 V Switch Red - 12 VDC (SUPPLY)

GND Black - Power Ground (GND)

FIGURE 4. CS105MD Wiring Diagram

CS105/CS105MD Barometric Pressure Sensor

4. Programming

4.1 CS105MD

Programming the MetData1 station for the CS105MD is done through

Campbell Scientific’s Short Cut program. Short Cut includes code in the

.DLD file to correct for elevation.

4.2 CS105

Atmospheric pressure changes little with time. In most weather station

applications measuring pressure once an hour is adequate. In Examples 1 and

2 the datalogger turns on the CS105 one minute before the top of the hour with

a control port. As in the example, the execution interval must be one minute or

less. On the hour the datalogger measures the CS105, records the pressure,

and turns off the CS105.

In Example 3 the CS105 is measured every execution interval. The datalogger

turns the CS105 on and waits one second for the CS105 to warm up, before the

measurement is made.

The execution interval must be long enough to accommodate the one second

delay, to warm up the CS105, and all the other measurement and processing

instructions in the program.

In Example 4, the CS105 is measured every execution interval with a 21X. An

excitation channel is used to turn the CS105 on and off.

A CR10(X), CR500, and CR510 excitation channel

cannot be used to turn the CS105 on and off because

the maximum excitation voltage is 2.5 volts. The

CS105 control requires 5 VDC.

WARNING

In the example programs the pressure is reported in millibars (mb). To report

pressure in different units, multiply (Edlog Instruction 37) the measured

pressure by the appropriate conversion factor (Table 2).

TABLE 2. Conversion

Factors for Alternative

Pressure Units

To Find Multiply by

kPa 0.1

mm of Hg 0.75006

in of Hg 0.02953

PSI 0.0145

Ce manuel convient aux modèles suivants

Table des matières

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