INFICON 2020ComboPRO Portable Photoionization Detector - Manual (Page 57)

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During calibration, all alarms are disabled. Once the calibration is complete, the
alarms are re-enabled.
User Interface
– Basic Menu
The 2020ComboPRO is designed for ease of use with a logically organized internal
menu structure/user interface. The 2020ComboPRO User Menus as shown in
Figures 6-11.
The 2020ComboPRO has three soft keys under the graphic LCD display which
always show the available functions of the soft keys in any screen.
Operation Modes
TVOC Monitoring Modes
In TVOC mode, Total Volatile Organic Compounds are detected.
Logging Off Mode
Logging Off mode is identified by the word “LOG” with a diagonal line through the
word “LOG” in the upper right corner of the 2020ComboPRO display. Logging Off
will continuously display the concentration of total volatile compounds present that
the 2020ComboPRO can ionize. The reading is updated approximately once per
second. In Logging Off mode, the only soft key displayed is MENU.
MENU selects the 2020ComboPRO’s internal menu for the instrument setup by the
user.
Tag Mode
Tag mode is identified by the word “TAG” in the upper right-hand corner of the
2020ComboPRO display. Tag mode will continuously display the instantaneous
concentration of total volatile compounds. Tag mode also allows the user to
manually tag and datalog readings. Tag mode allows the user to datalog a
background reading, a sample reading and assign Site Codes to readings. In Tag
mode, the soft keys are VIEW, TAG and MENU.
VIEW selects datalogger review.
TAG selects “No Label”, “Background”, or “Sample”.
MENU selects the 2020ComboPRO’s internal menu for the 2020ComboPRO setup
by the user.
Interval Mode
Interval displays the instantaneous readings as well as STEL, TWA, and PEAK
readings. Interval mode is identified by the letters “INT” in the upper right-hand
corner of the 2020ComboPRO display. Interval automatically calculates and
updates STEL, TWA, and PEAK readings. Interval mode also automatically stores