Revision 1 86 9/10/2019
5.9.1 General
The General box contains fields that affect the overall configuration of the analyzer.
• Live PPM Enable - If a checkmark is placed in this box, the analyzer’s LCD screen will
update the gas concentration as it is calculated within the analyzer on a live basis. When
this checkbox is left un-checked, the screen will only update with a new concentration value
when an analysis cycle has completed.
• If Live PPM is enabled, the concentration units displayed on the LCD screen will have an L
in front of them (i.e. if the concentration units are PPM, then the screen will read LPPM if
Live PPM is enabled).
• Live mV Enable - If a checkmark is placed in this box, the analyzer’s LCD screen will show
the raw sensor output, counting down from approximately 1000mV, rather than the sensor
output that is adjusted to count up from 0mV. If the Live mV is enabled, the units of the
sensor output displayed on the unit’s LCD screen will change from mV to LmV.
• Backlight Lock On - The LCD on the analyzer has a backlight that causes the screen to light
up and be easier to read. If this checkbox is checked, the backlight on the screen will be
continuously turned on. This should only be checked if power consumption on the analyzer
is not a serious concern.
• Site Identification - This box contains three fields that contain the unit’s unique identification.
The ID field contains the analyzer’s serial number. The Site field tells the operator which
site the analyzer is installed at, and the Location field tells the operator where in the site the
analyzer is installed. Do not change the ID field under any circumstances unless instructed
to by Galvanic service personnel.
• Version - The values in the three unchangeable fields in this box show the current versions
of firmware installed in the analyzer, the sensor block, and the Rosetta that helps the GUI
identify the data it reads from the analyzer. These values are useful for diagnosing
problems.
• Bypass Timeout - Bypass mode disables any outputs that may be triggered by alarms and
is normally used when service is being performed to avoid inadvertent triggering of alarms,
For normal operation, it is essential that bypass mode be disabled.
The analyzer is equipped with a bypass timeout. When enabled, by putting a checkmark in
the Enable box, bypass mode will automatically be exited by the analyzer after a certain
number of seconds after the last keypad button push. The length of the bypass timeout, in
seconds, can be set by the user in the Bypass Timeout(s) field. By default, this is set to 450
seconds, and is disabled. When the analyzer is in bypass mode, the output from both
analog outputs goes to the fail-safe output to ensure that the user recognizes that the
analyzer is in bypass mode.
• Trend Filter Length - This field determines the weighting the current reading has in the
calculation of the historical trend. The larger this number is, the smaller the weighting the
current value has in the calculation of the historical trend. The trend is a form of data
filtering that smoothes the long-term data to show a long-term trend in concentration. This
value should not be changed except after consultation with the Galvanic Applied Sciences
service department.
• Purge Time - This field determines the length of time the analyzer should be purged after a
stream switch. When a stream switch occurs, the analyzer will advance the tape, then
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