INFICON 2020ComboPRO Portable Photoionization Detector - Manual (Page 52)

ISP-074-575-P1D 45 45
Keys
Fixed Keys
The 2020ComboPRO has two fixed keys. The first fixed key is the ON/OFF key.
The second fixed key is the dedicated calibration key. Pressing the CAL key will
start calibration in almost any mode.
The ON/OFF key is used to both turn on power to the 2020ComboPRO as well as
the turn off the power. To turn on the 2020ComboPRO, press the ON/OFF key. To
turn off the power, press the ON/OFF key and hold it down for 5 seconds, and then
release it. This is done to prevent accidental power off.
Soft Keys
The three soft keys on the 2020ComboPRO are located directly below the display.
Each key has varying functions for configuring the 2020ComboPRO, editing the
data, and controlling the display. Since only three soft keys are available, each
function is broken down into a path. Maps, showing each path and the resulting
functions, are shown in Figures 6-11.
Beginning Operation
Turning On the 2020ComboPRO
1. Turn on the 2020ComboPRO by pressing the ON/OFF key.
See Figure 1 for the location of the ON/OFF key.
2. The 2020ComboPRO will display the instrument’s software version
number. Next the 2020ComboPRO will proceed to the mode display.
3. The 2020ComboPRO has an instant-on lamp in all modes. For
maximum accuracy and stability, allow the 2020ComboPRO to warm-
up for 10 minutes prior to calibration.
Default Display
The display shows the last mode the 2020ComboPRO used. The resolution of the
display changes with the magnitude of the reading. A reading of 0 to 99.9 will be
displayed with a resolution of 0.1 ppm. A reading greater than 99.9 will be shown
with a resolution of 1 ppm. The meter will display concentrations up to 10,000 ppm.
Changing the Operating Mode
Press the “menu” key. Press the middle soft key to select “Switch to TVOC mode”
or “Switch to GAS mode” then press select.