Dräger Multi-PID 2, Руководство пользователя

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54
Menu Functions
User Interface – Basic Menu
The Multi-PID 2 is designed for ease of use with a logically organized
internal menu structure/user interface. The Multi-PID 2 User Menu is
shown in Figures 6 and 7 on page 30 and page 31.
The Multi-PID 2 has three soft keys under the graphic LCD display
which always show the available functions of the soft keys in any
screen.
Operation Modes
GAS mode
The GAS mode is a filter tube mode. This means that all measure-
ments require the installation of the pre-filter tube holder and of the
pre-filter tubes. In this selective measuring mode, the PID pre-filter
tube benzene which is mounted at the head end of the pre-filter tube
holder and adsorbs all substances with the exception of benzene is
used to selectively measure benzene. The entire process is menu-
driven. The selective benzene measurement value is displayed after
90 seconds.
Activating the GAS mode opens a dialog which queries a device cali-
bration. The benzene measurement screen is displayed after installa-
tion of the PID pre-filter tube benzene. The following values are
displayed: benzene concentration in xx ppm, STEL value, the highest
benzene measurement value recorded so far (SMAX), the amount of
measurements already carried out (SAMP) – corresponds with the
amount of PID pre-filter tube benzene already used, and the sampling
interval period of 90 seconds (SECS).
Pressing the
" view " key shows the Datalogger measurement values.
Pressing the " menu " key takes you back to the selection menu.
Pressing the " sample " key starts the measurement: the pump is acti-
vated and the measured air is drawn through the PID pre-filter tube
benzene for 90 seconds. The measurement status is indicated by the
flashing concentration value and by the flashing word
" sampling " .
The number 90 displayed under SECS counts down to 0. So the dis-
played number shows the remaining measuring time.
" sample
done " signalled in the display indicates that the measurement is fin-
ished.
The PID pre-filter tube benzene is a one-shot-device and cannot be
used for a second measurement. Repeatedly pressing the
" sample "
key will call up the information that the PID pre-filter tube benzene in
use is no good and that a new PID pre-filter tube benzene must be put
into the pre-filter tube holder. Only after inserting a new tube will
pressing the
" sample " key start a new measurement.