Campbell Met One 034A-L Manuel de l'opérateur télécharger pdf (Page 61)

Manual

Annex 5: Guidelines for Assessing Station Performance Using Daily Signature and

Battery Voltage Recordings

5-A General

METSTAT includes routines to monitor two essential station performance indicators, namely (1) battery voltage and

(2) the signature of the active datalogger program.

The Open Circuit Voltage (OCV) of the battery in use is measured automatically on a daily basis. The voltage record-

ings are stored in the logger’s RAM and periodically transferred, together with all meteorological information and

through the SM4M/SM192 Storage Modules, to a personal computer.

A series of daily battery voltage recordings gives a clear indication of the state of the battery and the performance

of the charging components. This information can be used to identify possible power failures at an early or interme-

diate stage, hence avoiding data loss and/or damage to other system elements.

The signature concerns a number, which is a function of the actual text of the active datalogger program. Change

of a single letter will result in a different number. Consequently, an alteration of the signature indicates a corrupted

datalogger program.

The program signature is determined on a daily basis and stored in the logger’s RAM. It is retrieved together with

all other recordings in the Final Storage Area through the SM4M/SM192 Storage Module.

The appropriate instructions to transfer information from the logger’s RAM to the SM4M/SM192 are given in para-

graph 2.3.

The appropriate instructions to transfer information from the SM4M/SM192 to PC are given in “Manual on Data

Retrieval, Processing and Final Storage in the Nile Basin Database” or in Campbell Scientific’ Instruction Manual for

PC208W Datalogger Support Software.

The recorded station performance indicators can be accessed using the REPORT (a.k.a SPLIT) module of PC208W

(version 2.2). The remainder of this annex presents detailed instructions how to view, and interpret this informa-

tion.

5-B Assessing Station Performance Information

Station performance information, i.e. daily battery voltage and program signature recordings, can be examined using

PC208W Datalogger Support Software, which icon is presented below.

Double click this icon to activate PC208W. The following toolbar appears:

Annexes

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 74 75

Pas de commentaire

Campbell Met One 034A-L Manuel de l'opérateur Page 61