Instrument Location; Installation Checklist - Hach ORBISPHERE 3658 Manual Básico Del Usuario

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Figure 2 Model 32939 power supply
Connect the male LEMO-6 plug on the power supply adapter, to the RS-232 connector on the right
side of the instrument. The female LEMO-6 plug can then be used to connect to your PC using the
standard RS-232 cable supplied with the instrument.
Plug the transformer into your mains power supply using the cable supplied.
Note: If the external power supply is not clean, this may result in unstable measurements.

Instrument location

Locate the instrument close to the sample being analyzed, and to the PC if one is being used. A
LEMO-6 connector for RS-232 serial output to a PC is on the right side of the instrument (No. 6 in
Figure 1
on page 6).
Make sure you install a fully charged set of batteries, or connect the instrument to an external power
source (see
External power supply (optional)
on page 7 for details) before switching the instrument
on and exposing the sensor's membrane to any liquid.

Installation checklist

Power
The instrument is designed to work on battery power or an external power supply.
If battery power should drop, a [LO BAT] warning appears in the instrument LCD's top left corner,
and they should be replaced.
If using an external power supply, ensure that this is clean, otherwise it may result in unstable
measurements.
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 24.
Barometric pressure setting
The internal barometric pressure sensor has been factory calibrated but should be verified on-site
with a precision certified barometer, and corrected if necessary. For instructions on how to do this,
please refer to
Barometric pressure sensor calibration
on page 17.
Flow chamber
The flow chamber inlet and outlet should be free of any obstructions.
When analyzing carbonated beverages, sufficient pressure must be provided to avoid degassing of
the beverage during its passage through the flow chamber. Check for the absence of bubbles in the
inlet tubing.
If necessary, adjust the pressure using the flow adjustment valve.
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