HACH LANGE ORBISPHERE 3650 User manual

ORBISPHERE Model 3650
USER MANUAL
February 2009, Revision F

1
Table of Contents
Section 1 General Information......................................................................................................... 3
1.1 Disclaimer .................................................................................................................................... 3
1.2 Safety information ........................................................................................................................ 3
1.2.1 Use of hazard information................................................................................................... 3
1.2.2 Service and repairs ............................................................................................................. 3
1.2.3 Precautionary labels............................................................................................................ 4
1.3 Product recycling information....................................................................................................... 5
1.4 Product disposal .......................................................................................................................... 7
1.5 Restriction of hazardous substances (RoHS) .............................................................................. 8
Section 2 Specifications.................................................................................................................... 9
2.1 General technical data ................................................................................................................. 9
2.2 Instrument display options ........................................................................................................... 9
2.3 Theory of operation...................................................................................................................... 9
Section 3 Installation........................................................................................................................ 11
3.1 Sensor installation...................................................................................................................... 12
3.2 Flow chamber installation .......................................................................................................... 12
3.3 Sample tube adapter (optional).................................................................................................. 13
3.4 WinLog97 PC program installation ............................................................................................ 13
3.5 Connections ............................................................................................................................... 13
3.5.1 External power (optional) ..................................................................................................13
3.5.2 Instrument - PC Connection.............................................................................................. 14
3.6 Installation completion check list................................................................................................ 15
3.6.1 Batteries............................................................................................................................ 15
3.6.2 Instrument clock setting .................................................................................................... 15
3.6.3 Electrochemical sensor.....................................................................................................15
3.6.4 Flow chamber.................................................................................................................... 16
3.7 Storage when not used .............................................................................................................. 16
Section 4 Operating Information................................................................................................... 17
4.1 Operating controls...................................................................................................................... 17
4.2 Taking measurements ............................................................................................................... 19
4.2.1 Preconditioning sensors....................................................................................................19
4.3 Storing measurements in the instrument ................................................................................... 20
4.3.1 Automatic data acquisition ................................................................................................ 20
4.3.2 Manual data acquisition ....................................................................................................21
4.3.3 Viewing stored measurements.......................................................................................... 22
4.4 Storing and accessing measurements from the PC................................................................... 22
4.4.1 Downloading stored values ............................................................................................... 22
4.4.2 Altering the sampling point descriptions............................................................................ 23
4.4.3 Copying values.................................................................................................................. 23
4.4.4 Saving values.................................................................................................................... 23
4.4.5 Printing values................................................................................................................... 23
4.4.6 Clearing stored values ...................................................................................................... 24
4.5 Monitoring measurements in real-time....................................................................................... 24
Section 5 Options Setup ................................................................................................................. 27
5.1 Main menu basics ...................................................................................................................... 27
5.2 Instrument - PC connection ....................................................................................................... 28
5.3 Reviewing instrument configuration ...........................................................................................29
5.4 Configuring the instrument......................................................................................................... 29
5.4.1 Automatic data acquisition - Setting sampling intervals.................................................... 29
5.4.2 Membrane selection.......................................................................................................... 30
5.4.3 Selecting type of calibration ..............................................................................................30
5.4.4 Locking out the instrument’s CAL button .......................................................................... 31
5.4.5 Sensor calibration range checking.................................................................................... 31
5.4.6 Entering a span gas value................................................................................................. 31

2
Table of Contents
5.4.7 Dual use (model 3650/113 only) .......................................................................................32
Section 6 Calibrations......................................................................................................................33
6.1 Pressure calibration....................................................................................................................33
6.2 Sensor calibration.......................................................................................................................34
6.2.1 Calibration in a span gas...................................................................................................34
6.2.2 Calibration in line...............................................................................................................35
6.2.3 Calibration in air ................................................................................................................36
6.3 Calibration range checking.........................................................................................................36
Section 7 Maintenance and Troubleshooting.............................................................................37
7.1 Maintenance...............................................................................................................................37
7.1.1 Instrument batteries...........................................................................................................37
7.1.2 Sensor ...............................................................................................................................37
7.2 Troubleshooting..........................................................................................................................37
7.2.1 Serial test ..........................................................................................................................37
7.2.2 Keyboard test ....................................................................................................................38
7.2.3 Display test........................................................................................................................38
7.2.4 Clock settings ....................................................................................................................38
7.2.5 Analog voltages view.........................................................................................................39
7.2.6 Measurements view ..........................................................................................................39
Section 8 Part Lists...........................................................................................................................41
8.1 Instrument configurations...........................................................................................................41
8.2 Accessories................................................................................................................................41
8.3 Spare parts.................................................................................................................................41
Section 9 Glossary............................................................................................................................43
9.1 Common units ............................................................................................................................43
9.2 Terms and definitions.................................................................................................................43

3
Section 1 General Information
1.1 Disclaimer
The information in this manual has been carefully checked and is believed to be accurate.
However, Hach Lange assumes no responsibility for any inaccuracies that may be contained in
this manual. In no event will Hach Lange be liable for direct, indirect, special, incidental, or
consequential damages resulting from any defect or omission in this manual, even if advised of
the possibility of such damages. In the interest of continued product development, Hach Lange
reserves the right to make improvements in this manual and the products it describes at any
time, without notice or obligation.
Copyright © 2009 by Hach Lange. All rights reserved. No part of the contents of this manual
may be reproduced or transmitted in any form or by any means without the written permission of
Hach Lange.
1.2 Safety information
For safe operation, please read the entire manual before unpacking, setting up, or operating this
instrument.
Pay particular attention to all warning and caution statements. Failure to do so could result in
serious injury to the operator or damage to the equipment.
To ensure the protection provided by this equipment is not impaired, do not use or install this
equipment in any manner other than that which is specified in this manual.
1.2.1 Use of hazard information
WARNING
A warning is used to indicate a condition which, if not met, could cause serious personal injury
and/or death. Do not move beyond a warning until all conditions have been met.
CAUTION
A caution is used to indicate a condition which, if not met, could cause minor or
moderate personal injury and/or damage to the equipment. Do not move beyond a
caution until all conditions have been met.
Note: A note is used to indicate important information or instructions that should be considered
before operating the equipment.
1.2.2 Service and repairs
None of the instrument’s components can be serviced by the user. Only personnel from Hach
Lange or its approved representative(s) is (are) authorized to attempt repairs to the system and
only components formally approved by the manufacturer should be used. Any attempt at
repairing the instrument in contravention of these principles could cause damage to the
instrument and corporal injury to the person carrying out the repair. It renders the warranty null
and void and could compromise the correct working of the instrument and the electrical integrity
or the CE compliance of the instrument.
If you have any problems with installation, starting, or using the instrument please contact the
company that sold it to you. If this is not possible, or if the results of this approach are not
satisfactory, please contact the manufacturer’s Customer Service.

4
General Information
1.2.3 Precautionary labels
Read all labels and tags attached to the instrument. Personal injury or damage to the instrument
could occur if not observed.
This symbol, when noted on a product enclosure or barrier, indicates that a risk of electrical
shock and/or electrocution exists and indicates that only individuals
qualified to work with hazardous voltages should open the enclosure or remove the barrier.
This symbol, when noted on the product, indicates that the marked item can be hot and
should not be touched without care.
This symbol, when noted on the product, indicates the presence of devices sensitive to
electrostatic discharge and indicates that care must be taken to prevent damage to them.
This symbol, when noted on the product, identifies a risk of chemical harm and indicates that
only individuals qualified and trained to work with chemicals should handle chemicals or
perform maintenance on chemical delivery systems associated with the equipment.
This symbol, if noted on the product, indicates the need for protective eye wear.
This symbol, when noted on the product, identifies the location of the connection for protective
earth (ground).
Electrical equipment marked with this symbol may not be disposed of in European public
disposal systems. In conformity with European local and national regulations, European
electrical equipment users must now return old or end-of-life equipment to the manufacturer
for disposal at no charge to the user.
Products marked with this symbol indicates that the product contains toxic or hazardous
substances or elements. The number inside the symbol indicates the environmental protection
use period in years.

5
General Information
1.3 Product recycling information
ENGLISH
Electrical equipment marked with this symbol may not be disposed of in
European public disposal systems after 12 August 2005. In conformity with
European local and national regulations (EU Directive 2002/96/EC), European
electrical equipment users must now return old or end-of-life equipment to the
manufacturer for disposal at no charge to the user.
Note: For return for recycling, please contact the equipment
manufacturer or supplier for instructions on how to return end-of-life
equipment for proper disposal.
DEUTSCH
Elektrogeräte, die mit diesem Symbol gekennzeichnet sind, dürfen in Europa nach dem 12.
August 2005 nicht mehr über die öffentliche Abfallentsorgung entsorgt werden. In
Übereinstimmung mit lokalen und nationalen europäischen Bestimmungen (EU-Richtlinie
2002/96/EC), müssen Benutzer von Elektrogeräten in Europa ab diesem Zeitpunkt alte bzw. zu
verschrottende Geräte zur Entsorgung kostenfrei an den Hersteller zurückgeben.
Hinweis: Bitte wenden Sie sich an den Hersteller bzw. an den Händler, von dem Sie das Gerät
bezogen haben, um Informationen zur Rückgabe des Altgeräts zur ordnungsgemäßen
Entsorgung zu erhalten.
FRANCAIS
A partir du 12 août 2005, il est interdit de mettre au rebut le matériel électrique marqué de ce
symbole par les voies habituelles de déchetterie publique. Conformément à la réglementation
européenne (directive UE 2002/96/EC), les utilisateurs de matériel électrique en Europe doivent
désormais retourner le matériel usé ou périmé au fabricant pour élimination, sans frais pour
l'utilisateur.
Remarque: Veuillez vous adresser au fabricant ou au fournisseur du matériel pour les
instructions de retour du matériel usé ou périmé aux fins d'élimination conforme.
ITALIANO
Le apparecchiature elettriche con apposto questo simbolo non possono essere smaltite nelle
discariche pubbliche europee successivamente al 12 agosto 2005. In conformità alle normative
europee locali e nazionali (Direttiva UE 2002/96/EC), gli utilizzatori europei di apparecchiature
elettriche devono restituire al produttore le apparecchiature vecchie o a fine vita per lo
smaltimento senza alcun costo a carico dell’utilizzatore.
Nota: Per conoscere le modalità di restituzione delle apparecchiature a fine vita da riciclare,
contattare il produttore o il fornitore dell’apparecchiatura per un corretto smaltimento.
DANSK
Elektriske apparater, der er mærket med dette symbol, må ikke bortskaffes i europæiske offentlige
affaldssystemer efter den 12. august 2005. I henhold til europæiske lokale og nationale regler
(EU-direktiv 2002/96/EF) skal europæiske brugere af elektriske apparater nu returnere gamle eller
udtjente apparater til producenten med henblik på bortskaffelse uden omkostninger for brugeren.
Bemærk: I forbindelse med returnering til genbrug skal du kontakte producenten eller
leverandøren af apparatet for at få instruktioner om, hvordan udtjente apparater bortskaffes
korrekt.

6
General Information
SVENSKA
Elektronikutrustning som är märkt med denna symbol kanske inte kan lämnas in på europeiska
offentliga sopstationer efter 2005-08-12. Enligt europeiska lokala och nationella föreskrifter
(EU-direktiv 2002/96/EC) måste användare av elektronikutrustning i Europa nu återlämna gammal
eller utrangerad utrustning till tillverkaren för kassering utan kostnad för användaren.
Obs! Om du ska återlämna utrustning för återvinning ska du kontakta tillverkaren av utrustningen
eller återförsäljaren för att få anvisningar om hur du återlämnar kasserad utrustning för att den ska
bortskaffas på rätt sätt.
ESPANOL
A partir del 12 de agosto de 2005, los equipos eléctricos que lleven este símbolo no deberán ser
desechados en los puntos limpios europeos. De conformidad con las normativas europeas
locales y nacionales (Directiva de la UE 2002/96/EC), a partir de esa fecha, los usuarios
europeos de equipos eléctricos deberán devolver los equipos usados u obsoletos al fabricante de
los mismos para su reciclado, sin coste alguno para el usuario.
Nota: Sírvase ponerse en contacto con el fabricante o proveedor de los equipos para solicitar
instrucciones sobre cómo devolver los equipos obsoletos para su correcto reciclado.
NEDERLANDS
Elektrische apparatuur die is voorzien van dit symbool mag na 12 augustus 2005 niet meer
worden afgevoerd naar Europese openbare afvalsystemen. Conform Europese lokale en
nationale wetgegeving (EU-richtlijn 2002/96/EC) dienen gebruikers van elektrische apparaten
voortaan hun oude of afgedankte apparatuur kosteloos voor recycling of vernietiging naar de
producent terug te brengen.
Nota: Als u apparatuur voor recycling terugbrengt, moet u contact opnemen met de producent of
leverancier voor instructies voor het terugbrengen van de afgedankte apparatuur voor een juiste
verwerking.
POLSKI
Sprzęt elektryczny oznaczony takim symbolem nie może byćlikwidowany w europejskich
systemach utylizacji po dniu 12 sierpnia 2005. Zgodnie z europejskimi, lokalnymi i państwowymi
przepisami prawa (Dyrektywa Unii Europejskiej 2002/96/EC), użytkownicy sprzętu elektrycznego
w Europie musząobecie przekazywaćProducentowi stary sprzęt lub sprzęt po okresie
użytkowania do bezpłatnej utylizacji.
Uwaga: Aby przekazaćsprzęt do recyklingu, należy zwrócićsiędo producenta lub dostawcy
sprzętu w celu uzyskania instrukcji dotyczących procedur przekazywania do utylizacji sprzętu po
okresie użytkownia.
PORTUGUES
Qualquer equipamento eléctrico que ostente este símbolo não poderá ser eliminado através dos
sistemas públicos europeus de tratamento de resíduos sólidos a partir de 12 de Agosto de 2005.
De acordo com as normas locais e europeias (Directiva Europeia 2002/96/EC), os utilizadores
europeus de equipamentos eléctricos deverão agora devolver os seus equipamentos velhos ou
em fim de vida ao produtor para o respectivo tratamento sem quaisquer custos para o utilizador.
Nota: No que toca à devolução para reciclagem, por favor, contacte o produtor ou fornecedor do
equipamento para instruções de devolução de equipamento em fim de vida para a sua correcta
eliminação.

7
General Information
1.4 Product disposal
Note: The following only applies to European customers.
Hach Lange is committed to ensuring that the risk of any environmental damage or pollution
caused by any of its products is minimized as far as possible. The European Waste Electrical
and Electronic Equipment (WEEE) Directive (2002/96/EC) that came into force on August 13
2005 aims to reduce the waste arising from electrical and electronic equipment; and improve the
environmental performance of all those involved in the life cycle of electrical and electronic
equipment.
In conformity with European local and national regulations (EU Directive 2002/96/EC stated
above), electrical equipment marked with the above symbol may not be disposed of in
European public disposal systems after 12 August 2005.
Hach Lange will offer to take back (free of charge to the customer) any old, unserviceable or
redundant analyzers and systems which carry the above symbol, and which were originally
supplied by Hach Lange. Hach Lange will then be responsible for the disposal of this
equipment.
In addition, Hach Lange will offer to take back (at cost to the customer) any old, unserviceable
or redundant analyzers and systems which do not carry the above symbol, but which were
originally supplied by Hach Lange. Hach Lange will then be responsible for the disposal of this
equipment.
Should you wish to arrange for the disposal of any piece of equipment originally supplied by
Hach Lange, please contact your supplier or our After Sales Service department in Geneva for
instructions on how to return this equipment for proper disposal.

8
General Information
1.5 Restriction of hazardous substances (RoHS)
The European Union RoHS Directive and subsequent regulations introduced in member states
and other countries limits the use of six hazardous substances used in the manufacturing of
electrical and electronic equipment.
Currently, monitoring and control instruments do not fall within the scope of the RoHS Directive,
however Hach Lange has taken the decision to adopt the recommendations in the Directive as
the target for all future product design and component purchasing.
Note: The following only applies to exports of this product into the People’s Republic of China.
1184 Board X
1112 Analog board X
1185 Board X
Spacer X
External connector X
O:
X:

9
Section 2 Specifications
2.1 General technical data
2.2 Instrument display options
2.3 Theory of operation
The sensor circuitry performs four functions:
•Applying a constant voltage to the anode
•Measuring the current flowing through the sensor
•Compensating this current for sample temperature variations
•Converting these resulting signals into a scaled current or voltage
The anode is held positive with respect to the cathode. Current flowing through the sensor due
to oxygen reduction at the cathode is converted to a voltage by an amplifier, the proportionality
between voltage and current being determined by the feedback resistance of this amplifier.
The output voltage is essentially a function of oxygen activity (partial pressure), temperature and
membrane permeability. Corrections for variations in membrane permeability are made when
the sensor is calibrated. The temperature compensation circuit accounts for temperature
variations. Hence the output voltage varies only with oxygen concentration.
Power Supply Batteries: two C-type cells, NiCd or alkaline, each 26 x
50mm, 2.4 - 3volts total
Power Autonomy 40 hours continuous use
Signal Drift <0.5% of reading between service
Serial Output (RS232) Baud rate: 9600; Stop Bits: 1; Start Bits: 0; Parity: None;
Temperature Compensation Range -5 to 60°C
Instrument Operating Limits -5 to 100°C
Dimensions (HxWxD) 150mm x 115mm x 220mm
Weight 2.4kg
Enclosure Protection IP 65/NEMA 4
EMC Requirements EN 61326:1997 + A1:1998 + A2:2001 + A3:2003
ISO Certification ISO9001/EN29001
Instrument Model Display Units Maximum Display
Resolution
3650/111 ppm/ppb (liquid)
ppm (liquid) only
1 ppb
0.001 ppm
3650/112 %/ppm (gaseous) 1 ppm
3650/113 ppm (liquid)
% (gaseous)
0.001 ppm
0.001%

10
Specifications

11
Section 3 Installation
This section provides necessary information to install and connect the instrument. Should you
have any questions, do not hesitate to contact your Hach Lange representative regarding the
installation procedure.
The ORBISPHERE 3650 instrument is a self-contained portable analyzer, configured to make
oxygen concentration measurements in gaseous or liquid samples, with Electrochemical (EC)
Sensors.
Refer to Instrument configurations on page 41 for a complete list of the 3650 instrument
configurations available.
Up to 500 measurement values can be stored in memory and downloaded to a personal
computer for further analysis.
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 Figure 1).
Figure 1 ORBISPHERE 3650 Portable O2Analyzer

12
Installation
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 electrochemical (EC) 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. If this is not the case, for full installation instructions, please refer to
the EC Sensors Maintenance & Installation Manual that was provided with your instrument.
Should a sensor service be required, then again please refer to the EC Sensors Maintenance
& Installation Manual for instructions on sensor servicing.
3.2 Flow chamber installation
The model 32007F flow chamber (illustrated in Figure 3 below) draws the liquid or gaseous
sample past the EC 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.
Figure 2 Electrochemical Sensor Components - Exploded View
Figure 3 Flow Chamber 32007F

13
Installation
3.3 Sample tube adapter (optional)
A model 32051 sample tube adapter can be attached to the flow chamber's inlet tubing. This
adapter, in turn, attaches to 6 mm or ¼ inch stainless steel or flexible tubing using rubber gasket
model 32813 (or, for 8 mm tubing, rubber gasket model 32814).
The tightening ring provides a compression fitting to the sample tube.
3.4 WinLog97 PC program installation
Install the WinLog97 program onto the PC 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.
3.5 Connections
3.5.1 External power (optional)
The instrument is usually powered by the batteries supplied. You can, however, power it from an
external +5VDC source (as supplied by an electronics supply store). Connect the 2-wire output
from this source, using a model 28083 male 6-pin LEMO plug, to the RS-232 connector on the
right side of the instrument.
Figure 4 32051 Sample Tube Adapter with Check Valve from Flow Chamber
Figure 5 External Power Connection
LEMO-6
Pin Description
Pin 1 Not used
Pin 2 Not used
Pin 3 Not used
Pin 4 Not used
Pin 5 External +5VDC voltage input
Pin 6 Ground

14
Installation
3.5.2 Instrument - PC Connection
An RS-232 cable is supplied with the instrument, with a 6-pin LEMO plug on one end and a
9-pin D-Type plug on the other.
Note: If you use an adapter for the connection to the PC, make sure it is designed for this purpose and,
thus, has all nine pins accessible. Some 25-to-9 pin adapters are supplied for specific use, such as a
mouse, and these may have only certain pins available.
It is not necessary to keep the PC connected to the instrument during measurement. This
connection is required for downloading stored measurements, real-time monitoring, reviewing
and changing configuration parameters and testing the instrument from the PC (see
Troubleshooting on page 37 for details).
Figure 6 Instrument to PC Connections
Pin RS232 Signal
Pin 1 Transmitted data (TXD)
Pin 2 Received data (RXD)
Pin 3 Not Used
Pin 4 Not Used
Pin 5 Not Used
Pin 6 Ground
Pin Use
Pin 1 Not Used
Pin 2 RS-232 Transmitted Data (TXD)
Pin 3 RS-232 Received Data (RXD)
Pin 4 Not Used
Pin 5 Ground
Pin 6 Not Used
Pin 7 Not Used
Pin 8 Not Used
Pin 9 Not Used

15
Installation
3.6 Installation completion check list
3.6.1 Batteries
The instrument is designed to work on battery power. If battery power should drop, a LO BAT
warning appears in the instrument LCD's top-left corner, and they should be replaced.
3.6.2 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 38.
3.6.3 Electrochemical sensor
Shipping conditions can have adverse effects on the sensor, thus you should perform a sensor
service as described in the accompanying EC Sensors - Maintenance & Installation Manual
before trying to make measurements.
However, if you intend to make trial measurements with the sensor as shipped, first examine the
sensor head. To do this, remove the plastic base at the bottom of the sensor, then unscrew the
calibration cap by loosening its collar (see Figure 2 on page 12).
Your sensor head is fitted with a screw-on protection cap. For a view of the sensor head, you
must remove the cap, using the spanner key supplied in your recharge kit. Do this carefully,
making sure not to wrinkle the membrane that covers the sensor head, held in place by a
membrane holding ring.
You should be able now to view the gold cathode in the center, surrounded by a guard ring
electrode, and separated by a fine groove. The counter electrode is underneath the membrane
support.
Figure 7 Sensor Components and Membrane Assembly Order

16
Installation
You will get a better look at all these components during your first sensor service. Before making
a measurement, check the sensor head to see that:
•The membrane mounting ring is firmly in place,
•The membrane surface is smooth and wrinkle-free,
•The electrolyte beneath the membrane is free of bubbles, and
•The electrodes appear clear, clean and bright.
3.6.4 Flow chamber
The model 32007F flow chamber's inlet and outlet should be free of any obstructions. Regulate
the sample flow using the adjustment knob on top of the flow chamber. 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, run clean water through the flow chamber to prevent passageways
from clogging. You may wish to repeat preconditioning (see Preconditioning sensors on
page 19) 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 EC Sensors - Maintenance & Installation Manual and then store it
dry, without electrolyte, and with the calibration cap in place for protection.

17
Section 4 Operating Information
4.1 Operating 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, %, etc.) 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 (as indicated in Figure 1 on page 11) to enable atmospheric
pressure equilibrium for sensor calibration, or for measurements in gaseous samples in % units.
The panel keyboard has the following push-button controls:
Power switch. This turns instrument power on or off. The instrument starts in measurement
mode
Places the instrument in measurement mode
Calibrates the analyzer against a reference sample. This button can be locked out from
the WinLog97 PC program
Stores a measurement value into memory
Backlights the LCD for approximately three minutes

18
Operating Information
To start the analyzer, press the keyboard POWER switch (located bottom left of the keyboard).
When you turn power on, the instrument displays its model number briefly, and then starts in
measurement mode.
You can access other instrument functions by pushing one of these keys while turning power on:
Once you have completed the installation and start-up procedures defined in Installation on
page 11, 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). The WinLog97
program operation is described in detail throughout the manual, where relevant.
Toggles 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
Sensor calibration - see Sensor calibration on page 34
Start automatic data acquisition - see Automatic data acquisition on page 20
Start memory storage view - see Viewing stored measurements on page 22
Display program identification information