Hach 3650 manual Operating Information, Operating Controls

3650 Portable O2 Analyzer - Operating Information 13 of 50

2 Operating Information

2.1 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 (ppm, ppb, or %) depending on the instrument model. To the LCD's right is a label showing the measurement units configured at the factory for your application.

Fig 2-1: Instrument Front Panel

In addition to the controls indicated on the front panel, there is also a pressure relief valve switch on top of the instrument (as indicated in Fig 1-1 on page 7) to enable atmospheric pressure equilibrium for sensor calibration, or for measurements in gaseous samples in % units.

The panel keyboard has the following push-button controls:

Power switch. Turns instrument power on or off. The instrument starts in measurement mode

Places the instrument in measurement mode

Calibrates the analyzer against a reference sample. This button can be locked out from the WinLog97 PC program

Operator Manual ORBISPHERE