HACH LANGE ORBISPHERE 3654, User Manual, Page: 20 / 58

18
Operating Instructions
You can access other instrument functions by pushing one of the following keys while also
pressing the power button:
Once you have completed the installation and start-up procedures defined in Installation on
page 11 , the analyzer can be operated independently, making measurements as a portable
hydrogen or nitrogen gas analyzer.
You may store these measurement values for later analysis via the WIN3654 program (on your
personal computer) or the memory view mode (on the instrument). The WIN3654 program
operation is described in detail throughout the manual, where relevant.
4.2 Taking measurements
To start the analyzer, press the
POWER
switch (located bottom left of the keyboard). When you
turn power on, the instrument displays the software version number briefly, and then starts a
series of start-up tests. This process should take only a few minutes, during which time a
[tSt]
message is displayed on the LCD. Once the tests are completed, a clearing message
[---]
is
displayed for a further sixty seconds before the instrument switches automatically to
measurement mode.
Note:
The start-up tests will be repeated until successful, or for a maximum of 15 minutes. If the tests are
still unsuccessful after 15 minutes, a
[Err]
message will be displayed and the instrument locked. Turn the
instrument off and retry the start-up procedures, but if the problem persists, please contact your local Hach
Lange service representative for assistance.
Measurement updates are displayed every 20 seconds, and it is normal for the right-most digits
to vary in reaction to slight variations in gas content. For accurate measurements, the sensor's
membrane must be at the same temperature as the sample to be analyzed. If this not the case,
allow some sample to pass through the flow chamber for about 3 minutes before taking any
measurements.
Toggles between gas concentration and temperature measurement
displays in measurement mode, increases or decreases the storage
number during storage or memory view, or sets a calibration value during
calibration
Selects dissolved or gaseous measurement phase - see Gas
measurement phase on page 29
Start automatic data acquisition - see Automatic data acquisition on
page 20
Start memory storage view - see Viewing stored measurements on
page 22
Starts continuous purge mode - see Continuous purge on page 49
Display program identification information