3 storing measurements in the instrument, 1 automatic data acquisition, Operating information – Hach-Lange ORBISPHERE 3650 User Manual
Page 30
28
Operating Information
4.3 Storing measurements in the instrument
The instrument will store up to 500 gas measurement values, labeled by numbers 0 through
499, along with the current date and time of each measurement. You have the choice of
acquiring this information manually or automatically, as described below.
Before storing measurements, you should verify the date and time settings of the instrument's
internal clock, as described in
4.3.1 Automatic data acquisition
Note:
When the instrument is used to automatically store measurement data, all buttons except the
POWER
key are disabled. If enough time elapses to store all 500 values, the instrument will return to
normal measurement mode and the buttons re-enabled.
Before starting automatic measurement storage, first select the sampling rate desired using the
Sampling Rate menu of the WinLog97 program (see
Automatic data acquisition - Setting
Note:
If you have not cleared previously stored values, the storage sequence automatically overwrites the
older values, as they are stored.
To end automatic storage, switch the instrument
OFF
(by pressing the
POWER
key) while it is in
normal measurement mode and not while it is in the process of automatically storing data.
Switching
ON
again without holding down the
STO
button returns the instrument to
measurement mode.
Note:
If you accidentally interrupt the automatic data storage by switching off the instrument while it is in the
process of storing a value, and you then attempt to download the stored values by the WinLog97 program,
you will get a Windows Checksum Error message, and you will not be able to view the measurement data.
If this happens, then go back to the instrument and manually log one more value (as described in
). You can then download your original set of values to your PC.
1.
Switch the instrument
OFF
(by pressing the
POWER
key)
2.
Then hold down the
STO
button while switching the
instrument back
ON
. The LCD displays the message
Sto
for about one second
3.
Normal gas concentration measurements are
displayed for about two minutes
4.
After two minutes the instrument displays the sample
number (starting at 000), then the gas concentration
measurement value followed by [---] to indicate
the measurement is being stored.
5.
This storage sequence repeats automatically, at the
rate specified by the WinLog97 program Sampling
Rate menu. Values are stored sequentially in sample
numbers 000 through 499.