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BT-610-9800 Rev C
4.3.2. Sampling
The Operate Screen displays current sample information when the unit is sampling (real
time data). Concentration values (/L, CF, M3) are time dependent so these values may
fluctuate early in the sample; however, after several seconds the measurement will
stabilize. Longer samples (e.g. 60 seconds) will improve concentration measurement
accuracy. Figure 9 shows the Operate Screen while sampling with RH/Temp probe
attached.
COUNTING… 58 L001
0.3
µ
29,780 CF
0.5
µ
1,400 CF
TEMP 24
C RH 40%
Figure 9
– Operate Screen (Sampling)
4.3.3. Sample Status
The top line of the Operate Screen displays the status of the BT-610 while the unit is
sampling. The following table shows the various status messages and their meaning:
Status
Description
STAR
TING…
Starting the sample and waiting for the count system to initialize.
COUNTING… 58
BT-610 is sampling. The time remaining is displayed to the far right.
HOLDING…10
BT-610 is in auto mode and is waiting for the hold time to finish. The
time remaining is displayed to the far right.
4.3.4. Sample History
Sample history (previous data) can be viewed on the Operate Screen when the unit is
stopped (not sampling). To view sample history, press the Enter key from the Operate
Screen. The unit will display the la
st sample event (newest record) and display “
” on
the right side of the display (see Figure 10) to indicate history data.
Press ◄ or ► to
move through sample history one record at a time (
◄ displays older events, ► displays
newer events). Press the Enter key at any time to return to the Operate Screen. Press
Start at any time to start a new sample.
Sample history will display 2 channels in Favorites mode. To view other channels,
change favorite sizes or disable Favorites mode (Section 5.4) before you view history.
15 AUG’10 11:23 L001
0.3µ 0 CF
0.5µ 0 CF
0.7µ 0 CF
Figure 10
– History Screen
