Table 4 shows an excerpt from a transfer sequence read into the Microsoft
HyperTerminal program via the IrDA receiver connected to the serial port
COM1 (9600, 8, 1, 0, Xon/Xoff). The data from the last measurement record
(leakage rates, etc.) are transferred after the measured values. This text file in
Table 4 can then be imported into an Excel file where it can be viewed.
The Excel file DC2000.exe can be downloaded as freeware from the internet
(http://mgkg.woehler.de). With this programm the logger data can be impor-
ted directly in the excel-list and it can also depict the pressure loss measure-
ments in graph form.
9.2 Logging
This menu item starts the logger that can store up to 4680 measurements
each with measured pressure, temperature and (optional) humidity values and
two measured temperature values, i.e. max 18,720 measured values. When
the battery voltage falls below a threshold of 2 V (battery symbol appears
on the display), the logger switches OFF automatically. Before starting the
logger for a longer period you should therefore check the battery status under
Measuring Mode —> V battery. Even without batteries, measured values are
retained in memory for over ten years. When the fastest scan rate of thirty
seconds is chosen, values can then be registered for max one day and fifteen
hours (see Table 5). The following scan intervals are possible and can be
selected in the Setup menu under Setup —> Log rate: 30 s, 1 min, 3 min, 10
min, 30 min, 1 h, 3 h, 4 h.
Table 5: Logger rate and max registration time for 4680 measurements
Log rate Max possible measuring time
30s 39 h
1 min 3.25 days
3 min 9.75 days
10 min 32,5 days
30 min 13 weeks
1 h 27 weeks
3 h 19 months
4 h approx. 2 years (with good dry bat-
teries)
When the C I/O key is pressed in logger mode the DC 2000
PRO
only out-
puts the text “Log” followed by the remaining memory and then the current
measured values. The cursor is locked for other commands. Logger mode is
ended when the device is switched OFF at the C I/O button (pressed for three
seconds). Data are transferred to a PC as explained under Section 9.1.
9. Logger/data transfer
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