Hach ORBISPHERE 3654 Basic User Manual page 8

4.2 Instrument overview
Figure 1 ORBISPHERE 3654 portable analyzer
1 Pressure relief valve
2 Flow chamber
3 Flow chamber locking nut
4.3 PC software installation
Install the PC software by inserting the accompanying CD into your PC and running the SetUp
program. Simply follow the on-screen instructions.
When finished, a new Windows Program Group labeled Orbisphere is created containing the
software and help files.
4.4 Atmospheric pressure equilibrium
As soon as you receive the instrument, it will be necessary to ensure the interior and exterior of the
instrument are both at the same atmospheric pressure. It is probable that during shipment these
pressures will become different.
To ensure the pressures are equal, simply press the pressure relief valve located on the top of the
instrument for about 5 seconds before releasing. Refer to
4.5 Sensor installation
The TC sensor connects to the instrument base through a 10-pin LEMO connector. A locking pin
holds the sensor in place.
8 English
4 TC sensor
5 RS-232 port
6 Battery cap
Instrument overview on page 8.