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5.1 Operating controls
The front panel of the instrument has a three-digit liquid crystal display (LCD). The LCD includes a
right-side marker to distinguish between gas concentration and temperature display. This marker
also indicates the measurement display units (g/kg, V/V, etc.) depending on the instrument
configuration. To the LCD's right is a label showing the measurement units configured at the factory
for your application.
In addition to the controls indicated on the front panel, there is also a pressure relief valve on top of
the instrument. Refer to
the installation procedures, and/or if pressure builds up inside the instrument due to large
temperature changes.
The panel keyboard has the following push-button controls:
Power switch. This turns instrument power on or places in standby. When switched on, the
instrument performs a series of start-up procedures before switching to measurement mode
Places the instrument in measurement mode
Calibrates the analyzer against a reference sample. This button can be locked out from the Hach
3654 PC program
Stores a measurement value into memory
Backlights the LCD for approximately three minutes. Push repeatedly to increase the backligth to
the maximum value and back to minimum.
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
You can access other instrument functions by pushing one of the following keys while also pressing
the power button:
Selects dissolved or gaseous measurement phase. Refer to
on page 19.
Start automatic data acquisition. Refer to
Start memory storage view .Refer to
All manuals and user guides at all-guides.com
Instrument overview
on page 8. This button need only be pressed as part of
Gas measurement phase
Automatic data acquisition
Viewing stored measurements
on page 15.
on page 16.
English 13
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