INFICON 2020ComboPRO Portable Photoionization Detector - Manual (Page 69)

62 ISP-074-575-P1D 62
3. Press the EDIT key to change the value for the Response Factor (RF) or the
PEAK, STEL and TWA alarms.
4. Press the EDIT soft key, highlight Name, RF, STEL, TWA, or PEAK using
the DOWN ARROW key, then press the SELECT soft key.
5. Use the up, down and right arrows soft keys to enter the desired number.
6. Highlight the  and press the DONE soft key.
7. Press the DONE soft key to return to the main display or press the SELECT
soft key to edit another value.
8. To return to the Main Menu, press SELECT then DONE.
To select a pre-programmed compound stored in the 2020ComboPRO’s Preset RF
library:
1. Press the MENU key.
2. Choose “Memory Slots”, then press the SELECT key.
3. Press the EDIT key.
4. Press the PRESET key.
5. Use the DOWN ARROW key to choose the alpha range of the compound of
interest, then press the SELECT key.
6. Choose the compound of interest using the DOWN ARROW key and press
the SELECT key.
7. Press the SELECT key to accept the choice or press EDIT to modify the
preset values for STEL, TWA and PEAK alarm as shown above.
Benzene Sample Analysis Mode
The 2020ComboPRO Benzene Sample Analysis procedure is shown below in
Figure 21. The user is prompted through the basic procedures for taking samples of
the specific gas of interest, that is, benzene.
GAS Mode
Calibrate unit?
Push cal button OR
press ‘No’ to start
Insert selected tube
Press the ‘Next’ key to
continue
Benzene measurement
screen will appear
Press ‘Sample’
Collecting sample
(counts down from 45
seconds)
Sample Done
To collect another
sample, press ‘Sample’
Tube life used up!
Press the ‘Next’ key to
continue
Figure 21. Sample Analysis Mode