LumaSense Technologies INNOVA 1412i - Manual (Page 94)

Chapter 8
______________________________________________________________________
_____________________________________________________________________________
BE6025-15 1412i Photoacoustic Gas Monitor LumaSense Technologies A/S
Page 94 of 202
u &t Using these push-buttons users can scroll “horizontally”
through any vertical level of data. For example, if the statistical
analysis of the measurement results for water-vapour are displayed
on the screen, then by using u you can read the statistical analysis
of the measurement results for gas A, B, C etc. and then go back to
the original display (see Fig.8.1 ).
EVENT This push-button can be used (pressed) to mark
the measurement being performed at the time at
which a special event occurred during a monitoring
task. Any such measurement will appear on the
display with an asterisk alongside it. By pressing
INFO when such a display is seen you can display
what the asterisk indicates. Section 8.2.2 shows
the display which appears when INFO is pressed
and explains all the symbols used. Marked events
are also shown on print-outs and of monitoring
task data (see section 8.2.3 ).
q This push-button allows the user to scroll
“vertically” downwards through the list of
measurement results (see Fig.8.1 ).
p This push-button allows the user to scroll
“vertically” upwards through the list of
measurement results. The measurement list is a
closed loop.
The push-buttons p and q have a repetitive function, which means
that if they are pressed continuously they will allow the user to scroll
very quickly through a list.
8.1.1 Processing Measurement Data
Gas measurement data stored in Display Memory can be processed
in the following way:
· It can be processed to produce Time-weighted Average (TWA)
concentrations of gases over any user-defined period of time.
8.1.2 Obtaining Time-weighted Average (TWA) Values
By using the AVERAGE button Time-weighted Average
concentrations (C
TWA
) of all the monitored gases can be obtained
over any user-defined period of time (T hours). The following steps
are involved:
1. Press SET-UP and S2.