Kippzonen BSRN Scientific Solar Monitoring System Bedienungsanleitung PDF herunterladen (Seite 164)

152

Specification Type 1 Type 2 Type 3

Analog-to-digital

converter type

Integrating Integrating, Sigma-

delta or Successive

approximation

Successive

approximation, Flash

converters

Resolution (bits) 16 - 28 16 - 24 12 - 16

Max. Voltage

Resolution (:V)

<0.1 < 1 20 (~ 2 with averaging)

One-year relative

uncertainty (:V) for 10

mV reading

±0.2 ±10 ±20 (averaging of 100

measurements)

Sampling Rate per

Second

<30 at 1 PLC 40 100 K

Power line Noise

Filtering

Yes No No

Autozero Capability Zero Some No

Internal Programming Yes Yes No

Internal Storage Limited Yes No

Direct Resistance &

Current Measurement

Yes Some No

Cost High Medium-High Low

Table F 1. Typical specifications for the three different types of data acquisition systems available for the

measurem ents of basic BSRN variables.

F 2. Data Acquisition Suppliers

A partial listing of data acquisition system manufacturers and the type of system(s) produced is provided

below. The list is in alphabetical order and is only provided to aid users in obtaining information before

selecting a system. Users must also be aware that many systems require additional sofrware and all

require regular calibration to operate effectively.

Agilent Technologies

395 Page Mill Rd.

P.O. Box #10395

Palo Alto, CA 94303

USA

http://we.home.agilent.com/

Type 1

American Advantech Corporation

No. 1, Alley 20, Lane 26,

Rueiguang Road, Neihu District,

Taipei 114, Taiwan, R. O. C.

http://www.advantech.com/

Type 3

Campbell Scientific, Inc.

P.O. Box 551

Logan, UT 84321

USA

http://www.csi.com/

Type 2

CyberReserach, Inc.

P.O. Box 9565

New Haven, CT 06535-0565

http://www.cyberresearch.com/

Type 3

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