palintest Macro 900, Руководство по эксплуатации

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Macro 900 Operation Manual V3
© 2013 Palintest Ltd. www.palintest.com Page 19 of 147
measurement, temperature is automatically compensated for.
During calibration of the pH electrode, the small variation in the calibration
buffer solutions due to temperature is not compensated for due to the
differences in thermal coefficient between various buffer manufacturers. For
this reason, the three pH points should be calibrated as close to the buffer
manufacturer's specified temperature as possible (usually 20ºC or 25ºC)
although a variation of up to +/-10ºC makes very little difference in reality.
During pH measurement, temperature variation is automatically compensated
for.
6.5. GPS Reception
The Macro 900 Meter contains a built-in GPS receiver and antenna. The
antenna is situated at the top of the case, just behind the Palintest logo. For
optimum signal reception, the antenna must be able to ‘see’ a reasonably large
amount of the sky. The GPS receiver will not work indoors or when
shielded from the sky by any solid structure.
After switch-on, the GPS receiver will automatically start to search for satellites.
During this phase, the message
GPS:Acquiring will be shown on the bottom
line of all the screens. As soon as three satellites are acquired, two dimensional
position (no altitude) will be calculated and the message GPS:2D POS will be
shown on the bottom line of the screens.
Once a fourth satellite is acquired, altitude will be calculated and
GPS:3D POS
will be shown on the bottom line of the screens. With a good view of the sky,
position should be calculated within ninety seconds of switch-on. To see your
geographic position and the number of satellites in use, use the left or right
arrow keys to scroll to the Position page.
If you switch the meter on indoors, then carry it outside after several minutes,
there may be a considerable delay in acquiring satellites. In this case, switch
the meter off, then back on again to reset the acquisition process.