Hach 3654 Portable H2/N2 Analyzer manual Operating Instructions, Operating Controls

3654 Portable H2/N2 Analyzer - Operating Instructions 17 of 66

2 Operating Instructions

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 (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.

Fig 2-1:Instrument Front Panel

In addition to the controls indicated on the front panel, there is also a pressure relief valve on top of the instrument (as indicated in Fig 1-1 on page 9). This button need only be pressed as part of 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. 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 using the WIN3654 PC program

Operator Manual ORBISPHERE