Hach ORBISPHERE 3655 Manuel D'utilisation Simplifié page 5

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public disposal systems. Return old or end-of-life equipment to the manufacturer for disposal at no
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years.
Section 3 Installation
Figure 1 3655 Portable analyzer
1 Barometric pressure sensor relief valve
2 RS232 port or external power supply
3 Battery cap
The ORBISPHERE 3655 portable analyzer is configured to make high-sensitivity dissolved hydrogen
or oxygen concentration measurements, with Electrochemical (EC) Sensors, for the power industry.
Locate the instrument convenient to the sample being analyzed and to the PC if one is being used. A
6-pin LEMO connector for RS-232 serial output to a PC, or an optional external power source is
located on the right side (as illustrated in
3.1 Sensor installation
The sensor has a threaded collar and calibration cap, and a screw-on protection cap to prevent
disturbances to the membrane. A plastic screw-on base at its rear provides a stand for servicing, and
protects the sensor's screw-on 10-pin LEMO connection.
The sensor connects to the instrument base through a 10-pin LEMO connector. A locking nut holds
the sensor in place. Generally, the sensor is shipped already installed in the instrument.
Shipping conditions can have adverse effects on the sensor, thus you should perform a sensor
service as described in the accompanying Sensor Manual before trying to make measurements.
3.2 Flow chamber installation
The model 32007D flow chamber draws the liquid sample past the sensor. It attaches to the sensor
with a threaded collar and is then sealed to the sensor with two O-rings. The flow chamber centrally
located inlet and eccentrically located outlet use either ¼-inch or 6-mm diameter transparent plastic
tubing. Connect by compression fittings to the sample source and to the drain, respectively.
4 Flow chamber
5 EC sensor
Figure 1).
English 5