HACH LANGE ORBISPHERE 3654, Руководство пользователя, Страница: 22 / 58

20
Operating Instructions
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
WIN3654 program (see
Automatic data acquisition - setting sampling intervals on page 31 ).
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, put the instrument into standby (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 WIN3654 program,
you will get a Windows
Checksum Error
message, and you will not be able to view the measurement data.
If this happens, go back to the instrument and manually log one more value (described in Manual data
acquisition on page 21 ). You can then download your original set of values to your PC.
1.
Put the instrument into standby (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 WIN3654 program Sampling Rate
menu. Values are stored sequentially in sample
numbers
000
through
499
.