Hach ORBISPHERE 3650 Atex, User Manual

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21
Installation
3.6 Installation completion check list
3.6.1 Battery
The instrument is designed to work on battery power.
Install the Exproof lithium battery by first unscrewing the instrument's battery cap located on the
right side of the instrument (refer to
Figure 1 on page 17 ) with a coin or flat screwdriver. Then
insert the battery pack lengthwise, positive end first, and replace the cap.
The power autonomy of the instrument is about 60 hours with a new battery. If battery power
should drop, a
LO BAT
warning appears in the instrument LCD's top-left corner.
3.6.2 Electrical connections
The LEMO-6 connector on the right side of the instrument (refer to Figure 1 on page 17 ) is used
for the connection to a PC. To connect the instrument to a PC, use the model 29122 interface
box (refer to
3650Ex Instrument - PC connection on page 19 ).
Remember, connecting the instrument to the interface box means it is now powered by mains
power and the battery power is by-passed.
3.6.3 Instrument clock setting
If you use the instrument to store measurements for downloading to a PC, you should verify the
date and time settings of the instrument's internal clock, as described in
Clock settings on
page 44 .
3.6.4 Electrochemical sensor
Before making any measurements, for GA2800 ATEX sensors perform the preparation
procedure in the
GA2X00 Sensor Manual . For other ATEX sensors perform the sensor service
procedure as described in the EC Sensor Manual .
3.6.5 Flow chamber
The model 32007E flow chamber's inlet and outlet should be free of any obstructions. It is
mounted by means of the sensor's collar, as shown in
Figure 2 on page 18 . A guide pin on the
flow chamber surface prevents twisting during operation.
When switching from liquid to gaseous samples, ensure that the sensor membrane is dry.
Ensure that the gas from the exit tube of the flow chamber (in gaseous mode) is released at
atmospheric pressure and that it is constant.
3.7 Storage when not used
At the end of the workday clean the outside of the instrument and interface box (if used) with a
damp cloth. Run clean water through the flow chamber to prevent passageways from clogging.
You may wish to repeat sensor preconditioning (refer to
Preconditioning sensors on page 25 )
prior to the next use.
If you do not expect not to use your sensor for more than a few months, you should clean the
sensor as instructed in the
Sensor Manual and then store it dry and with the calibration cap in
place for protection.
• Only the model 32960 battery can be used with this instrument.
• The battery may be installed or changed in the hazardous area
• The instrument to PC connection should be used only in a safe area .