41
To enable automatic datalogging…
1. Select the Logger menu (
→
→
F4:Logger
).
2. Select
F5:Enable
from the menu to enable automatic datalogging.
3. The
hydro
CHEM
now confirms that automatic datalogging is enabled, and gives you the
choice of logging into memory, or sending readings directly to the RS232 port…
Data Logging Enabled
F1:Log Data F2:Send to RS232
Press
to log the data into the
hydro
CHEM
memory whenever a reading is due.
Press
to send the data directly to the RS232 port whenever a reading is due.
NOTE:
The
key is not available to quit at this point, as logging has already been enabled.
4. The
hydro
CHEM
calculates a "logical" time for the next reading to be logged, so that readings
are logged at even times during the 24 hour day.
For example, if the logging period is set to 2 hours, the
hydro
CHEM
will log at 12:00, 2:00,
4:00 etc. Even if logging is enabled at an odd time such as 12:23, the unit will wait until 2:00
before recording the first reading. This feature makes data much easier to examine visually
later.
5. When logging data into memory, the
hydro
CHEM
alternates between the next log number and
the time the next reading is due to be logged on the display.
When sending data to the RS232 port, the
hydro
CHEM
alternates between the word "
#Send
"
and the time the next reading is due to be sent on the display.
To disable automatic datalogging…
1. Select the Logger menu (
→
→
F4:Logger
).
2. Select
F5:Disable
from the menu to enable automatic datalogging.
3. The
hydro
CHEM
confirms that automatic datalogging has been disabled.
15.3 Recalling Readings from the Notepad
To recall records from memory onto the
hydro
CHEM
display…
1. Select the Logger menu (
→
→
F4:Logger
)
2. Select
F1:Recall
from the menu.
Record number 1 is now displayed.
For example…
1.8mS/cm Offline 7.6pH OK 25.0
O
c
Log#1, 31/12/01 12:00
3. Press
to display the next record.
Press
to display the previous record.
Press and hold the
key while pressing the
and
keys to roll rapidly through the
readings.
Press
to send the displayed record to the RS232 port.
