Hach 3650 ATEX User Manual

Operator Quick Guide

ORBISPHERE 3650 ATEX

Revision D - 18/03/2008

Operating Information

About this Guide

The information in this guide has been carefully
checked and is believed to be accurate. However,
Hach Ultra assumes no responsibility for any
inaccuracies that may be contained in this guide.
In no event will Hach Ultra be liable for direct,
indirect, special, incidental, or consequential
damages resulting from any defect or omission in
this guide, even if advised of the possibility of
such damages. In the interest of continued
product development, Hach Ultra reserves the
right to make improvements in this guide and the
products it describes at any time, without notice or
obligation.

Before Taking Measurements

IMPORTANT: Before taking any measurements,

please ensure that the conditions of use
correspond to the certification of the instrument
and the installation was performed as described
in the Operator’s Manual.

Instrument 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 (ppm, ppb, or %)
depending on the instrument model.

To the LCD's right is a label showing the
measurement units configured at the factory for
your application.

In addition to the controls indicated on the front
panel, there is also a pressure relief valve switch
on top of the instrument to enable atmospheric
pressure equilibrium for sensor calibration, or for
measurements in gaseous samples in % units.

The button in the bottom right corner backlights
the LCD for approximately three minutes. The
other push-button controls are:

• POWER turns instrument power on or
off. The instrument starts in
measurement mode

• MEAS places the instrument in
measurement mode

• CAL calibrates the analyzer against a
reference sample. This button can be
locked out from the WinLog97 PC
program

• STO stores a measurement value into
memory

• The × Ø keys toggle between gas
concentration and temperature
measurement displays in measurement
mode, increases or decreases the
storage number during storage or
memory view, or sets a calibration value
during calibration

• POWER + CAL sensor calibration

• POWER + STO starts automatic data
acquisition.

• POWER + × starts memory storage view

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Startup

To start the instrument, press the keyboard

POWER switch. When you turn power on, the

instrument displays its model number briefly, and
then starts in measurement mode.

The instrument can be operated independently,
making measurements as a portable analyzer.
You may store these measurement values for
later analysis via the WinLog97 program (on your
personal computer) or the memory view mode (on
the instrument).

Measurement

Taking Measurements

Connect the top-mounted inlet to accept your
sample, typically this is accomplished by
connection to a sampling valve. The sample flow
can be regulated by the knurled stainless steel
knob on top of the flow chamber.

The LCD includes a right-side marker to
distinguish between gas concentration
measurements and temperature. To switch
between gas measurement and temperature
measurement, press the × Ø buttons. To
backlight the LCD for approximately three
minutes, press the Backlight button.

The analyzer will store up to 500 gas
measurement values, labeled by numbers 0
through 499, along with the current date and time
of each measurement. You have the choice of
acquiring this information manually or
automatically, as described below.

Automatic Data Acquisition

Before starting automatic measurement storage,
first select the sampling rate desired using the
Sampling Rate menu of the WinLog97 program.

Gas concentration measurements are displayed
for about two minutes. After two minutes the
instrument displays the sample number (starting
at 000), then the gas concentration measurement
value followed by [---] to indicate the
measurement is being stored.

This storage sequence repeats automatically, at
the rate specified.

To end automatic storage, switch the instrument

OFF (by pressing the POWER key) while it is in

normal measurement mode. Switching ON again
without holding down the STO button returns the
instrument to measurement mode.

Manual Data Acquisition

Switch the instrument OFF (by pressing the

POWER key). Then hold down the STO button

while switching the instrument back ON. The LCD
displays the message Sto for about one second.

For the first measurement you wish to store, press
the STO button once to display a sample number.
The default sample number is 000 (for first time
access), or the last used memory position where
data was stored, incremented by a value of 1.

You can increase or decrease this number by
pressing the × Ø buttons within three seconds.

Press STO a second time, within five seconds of
the first. The instrument then displays the gas
concentration measurement value for about three
seconds, followed by a clearing message as the
value is stored.

Repeat the above steps to store additional
measurements.

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Measurement (cont)

Viewing Stored Measurements

Switch the instrument OFF (by pressing the

POWER key). Hold down the × button while

switching the instrument back ON. The LCD
displays a sample location number.

Scroll through the numbered sample locations of
all the stored values using the × Ø buttons.

To view the actual gas concentration
measurement value at a particular sample
number, press the STO button. The LCD now
displays the stored value for that sample number.

Press STO a second time to return to the next
numbered location display, to continue scrolling
or view another stored value.

To return to the measurement mode, switch the
instrument OFF and then back ON again without
holding down any additional buttons.

Downloading Data

If you have made measurements and stored them
in the instrument, you should be ready to bring
them into the WinLog97 program for viewing,
copying, saving and printing. To download stored
data from the instrument to the PC, choose the

DownLoad data command from the Logger
menu.

The window displays the stored measurements
from the instrument showing the sample number,
gas concentration, a date and time stamp, and a
sample description.

Sample Description

For help in identifying the locations of various
sampling points that are stored by the analyzer,
you may choose the Sampling Point
Description command from the Logger menu.

The measurement values to be placed in
positions 0 through 499 can be described
however you wish. Double-click on a particular
position (or click Modify), then type a description
in the box.

Copy Data

To copy the results to the Windows Clipboard, so
that the data can be pasted into a spreadsheet,
word processor or other Windows program that
accepts tabular text information, choose the

Clipboard command from the Export menu.

Save Data

To save this list of measurements as a text file,
capable of being recalled by the WinLog97
program or imported as a file into other Windows
programs, choose the Save As command from
the File menu and enter the device and file name.

Print Data

To place this list of measurements into a tabular
format and send it to the printer, choose the Print
command from the File menu.

Clear Data

To clear all the values stored in the instrument,
choose the Clear Data command from the
Logger menu. Since this action will clear the
storage memory of the instrument, a warning
appears which you must confirm. Choose Clear
to start the memory clear operation.

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