Campbell Scientific PWS100 Present Weather Sensor - Manual (Page 62)

Section 7. Operation
Option 7 of the configuration menu gives the OUTPUT MODE menu (Figure
7-16). This refers to the use of packetized output. The message framing is done
by STX (ASCII character 02) and ETX (ASCII character 03); these act as start
and end delimiters. The default value is 1 (STX / ETX on). These framing
characters are useful for programmers writing code to pick up data coming
from a sensor outputting data asynchronously to the device collecting it.
FIGURE 7-16. Output mode menu
Option 8 of the configuration menu gives the initial warning screen for the
calibration procedure (Figure 7-17). Unless the correct procedure is followed
and calibration entries are correctly input the PWS100’s performance can be
seriously degraded. In order to perform a calibration, the PWC100 calibration
unit is required, which affixes to the PWS and performs several checks of the
PWS100. This unit is connected via the LEMO socket of the PWS100 and
automatically provides values to the PWS100 system which can be used to
alter the calibration.
See the PWC100 calibrator manual for further instructions on how to run the
calibration device. The device itself can be run at any time during the operation
of the PWS100. It then provides size, velocity and visibility calibration values
which can be checked and accepted by the user using the PWS100 menu
system described below.
In order to proceed with the calibration routine confirm must be typed followed
by the return key.
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