Basic Operation
Dynamic Warm Up
2-18
PDM3700 Instruction Manual
Thermo Fisher Scientific
2.
In the Reset Sample 2 screen, press the “A” button to begin a second
manual sample run. The second manual sample run will begin
immediately after pressing the “A” button. The PDM3700 unit will
not perform another 35-minute warm-up period before beginning the
second manual sample run, and the Second Sample screen will display.
Note
After 30 seconds of inactivity in the Reset Sample 2 screen, the
PDM3700 will automatically display the First Sample Screen #1.
▲
The Second Sample Screen (
Figure 2–29
) displays the mass concentration,
cumulative exposure and elapsed time for the second manual sample run
(“Sample 2”). This screen will display immediately after the start of a
second manual sample run.
Figure 2–29.
Second Sample screen
The Second Sample Screen #1 contains the following information:
●
15 MIN.
This field contains the averaged mass concentration value
(mg) measured during the previous 15 minutes.
●
CUM2 CONC.
This field contains the cumulative mass concentration
value (mg/m
3
) measured from the beginning of the second sample run.
●
TIME.
This field contains the time duration (minutes/seconds) for the
second sample run.
During the sampling run, the PDM3700 will run automatically until the
sample cycle ends. At the end of the sample run, after 30 seconds of
inactivity, the PDM3700 will turn off its LED display. Press the “A”
button to reactivate the LED display.
Figure 2–30
provides a hierarchy of
all the firmware screens that can be accessed by pressing the “A” and “B”
buttons when the unit has been set up to run a manual sample run.
If the primary manual sample shift ends earlier than required, successive
manual sample shifts can be started with much shorter warm-up times.
During warm-up, the instrument monitors the sensors and will adjust the
warm-up time to as little as 5 minutes. Accordingly, the longer the
instrument has been off, the longer the warm-up time.
Second Sample
Screen
Dynamic Warm Up
