
9
To change the setting of the low pass filtering follow these steps:
1 Select the detector to be set up with keys if two detectors are
attached.
2 Press the SETUP key to enter the “detector setup mode.” The SETUP
key is one of the function keys annotated by the word SETUP on the
LCD. A menu of available settings will be presented on the LCD. The
SETUP annotation only appears when the detector is attached.
3 Use thekeys to select the Fltr: XXX item. The XXX will indicate
either ON or OFF.
4 Press the Menu/Enter key to set the status of the digital filter to a
desired state.
5 Press the Escape key to return to the display mode. At this time the
current setup of the detector is written to the detector’s memory.
Skipping this step or disconnecting the detector beforehand is
equivalent to ignoring the changes made.
4.2.2 AUTOMATIC DATA LOGGING
The PMA2100 is capable of storing the measurement data either in
manual or automatic mode. Refer to “Data Logging” on page 11 for
more information about data logging.
In the automatic mode one record of data is logged in memory per
user-selected interval, ranging from 1 minute to 1 hours. If two sensors
are attached at the same time, the data logging interval can be set
independently for each.
To initiate the automatic data logging, follow these steps:
1 Select the detector to be set up with keys if two are attached.
2 Press the SETUP key to enter the “detector setup mode.” The
SETUP key is one of the function keys annotated by the word
SETUP on the LCD. A menu of available settings will be presented
on the LCD.
3 Use thekeys to select the Sav: XXm item. The XX represents
the currently selected interval in minutes. If automatic data logging
is not activated then Sav: 0m (zero) will be shown.
4 Press the Menu/Enter key to enter the logging interval selection
menu. The currently set interval is shown on the header of the
menu.
5 Use thekeys to navigate through the list of valid intervals
and to select the desired one. Select NONE to disable data logging.
6 Press Menu/Enter to accept the selected interval. The LCD will
revert back to the “detector setup menu.”
7 Press the Escape key to return to the display mode. At this time
the updated logging configuration parameters are written to the
detector’s memory. Skipping this step or disconnecting the
detector beforehand is equivalent to ignoring the changes made.
4.2.3 SCALE
An additional user-preset scale factor can be applied to the
measurement. Normally the scale factor is set to 1.00 to accept the
factory calibrated scale factor of the detector.
To change the scale factor follow these steps:
1 Select the detector to be set up with keys if two are attached.
2 Press the SETUP key to enter the “detector setup mode.” The
SETUP key is one of the function keys annotated by the word
SETUP on the LCD. A menu of available settings will be presented
on the LCD.
3 Use thekeys to select the Scal: X.XX item. The X.XX
represents the currently set scale factor, typically 1.00.
4 Press the Menu/Enter key to enter the scale editing mode. The
name of the currently selected detector is shown on the LCD.
5 Use thekeys to move the cursor between the digits of the scale
value. Usekeys to increment or decrement the selected digit.
If the cursor is placed underneath the sign of the number then
pressing thekeys will toggle the sign between + and -.
6 Press Menu/Enter to accept the new scale value. The LCD will
revert back to the “detector setup menu.”
7 Press the Escape key to return to the display mode. At this time
the updated scale factor for the detector is written to the detector’s
memory. Skipping this step or disconnecting the detector
beforehand is equivalent to ignoring the changes made.
4.2.4 OFFSET
The measurement made by the PMA2100 can be offset by a user
entered value in order to compensate for the drifts in the detector or to
compensate for a background signal.
The offset setting is unit-sensitive, i.e. it takes the unit conversions into
account and converts the offset values accordingly.
To modify the offset follow these steps:
1 Select the detector to be set up with keys if two are attached.
2 Press the SETUP key to enter the “detector setup mode.” The
SETUP key is one of the function keys annotated by the word
SETUP on the LCD. A menu of available settings will be presented
on the LCD. The SETUP annotation only appears when the detector
is attached.
3 Use thekeys to select the Ofs: X.XXX item. The X.XXX
represents the currently set offset, typically 0.000.
4 Press the Menu/Enter key to enter the offset editing mode. The
name of the currently selected detector is shown on the LCD.
5 Use thekeys to move the cursor between the digits of the
offset value. Usekeys to increment or decrement the selected