wtw Oxi 315i User manual

ba52305edfs03 06/2004
ba52305edfs
Oxi 315i
Operating manual
Bedienungsanleitung
Mode d’emploi
Instrucciones de operación
Dissolved Oxygen Pocket Meter Page 3
Sauerstoff-Taschenmeßgerät Seite 11
Oxymètres de poche Page 19
Medidor manual del oxígeno disuelto Página 27
6
7
1
92
7
O
°
C
mg/l
ARng
TP
AR
CAL
M
O

Oxi 330i/340i
2
Note to this
operating manual This operating manual contains a description of
lall basic functions,
lall instructions for a safe operation, and
lall technical data in a compact form.
A more detailed description with notes for special applications is available as
a pdf document via internet under http://www.WTW.com.
Hinweise zu dieser
Bedienungs-
anleitung
Diese Bedienungsanleitung enthält in kompakter Form
ldie Beschreibung aller Grundfunktionen,
lalle Hinweise für den sicheren Betrieb und
lalle technischen Daten.
Eine ausführlichere Beschreibung mit Hinweisen für besondere Anwendun-
gen ist als pdf-Dokument im Internet unter http://www.WTW.com erhältlich.
Remarque àce
mode d’emploi Ce mode d'emploi contient sous forme compacte
lla description de toutes les fonctions de base et
ltoutes les informations assurant un fonctionnement sûr, ainsi que
ltous les données techniques.
Une description plus étendue contenant les informations sur des emplois
spéciaux peut être obtenue sous forme pdf dans l'internet sous http://
www.WTW.com.
Observación
a estas
instrucciones
Este manual de instrucciones incluye la descripción en forma resumida de
ltodas las funciones básicas,
ltodas las observaciones que le garantizan el
lfuncionamiento normal y seguro, asimismo todo las especificaciones y
datos técnicos.
En el internet, bajo http://www.WTW.com encuentra Ud. una descripción
más detallada, en formato pdf, para aplicaciones especiales.
Copyright ©Weilheim 2004, WTW GmbH

Oxi 315i List of contents
3
Oxi 315i - List of contents
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Display and jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Switching on the measuring instrument . . . . . . . . . . . . . . . . . . 5
Measuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Resetting to default settings. . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Safety Oxi 315i
4
Safety
Safety
instructions The individual chapters of this operating manual use safety instructions such as that shown below to indicate various hazards or dangers:
Warning
indicates instructions that must be followed precisely in order to avoid the
possibility of slight injuries or damage to the instrument or the environment.
Display and jack field
Display
Jack field
The portable instrument Oxi 315i automatically recognizes the type of the
connected oxygen sensor (CellOx 325 or DurOx 325).
Warning
Only connect sensors to the measuring instrument that cannot return any
voltages or currents that are not allowed (> SELV and > current circuit with
current limiting). Almost all sensors - in particular WTW sensors - fulfill these
conditions.
mbar
°
F
RCL
Auto
Store
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25 Tref20
nLF
AutoCal DIN
AutoCalTEC
Time
Baud
Day.Month No.
Ident
Year
S
8
8.
8
88
8
O
°
Sal
C
%
mg/l
LoBat
Cal
ARng AR
TP
1
Status display indicator
Measured value display
Function and
Temperature display
Sensor symbol
1Oxygen sensor with integrated temperature probe
1

Oxi 315i Switching on the measuring instrument
5
Switching on the measuring instrument
Measuring
Overview of the measuring modes:
Special functions:
AutoRead
(drift control) The AutoRead function checks the stability of the measurement signal. Acti- vate AutoRead with <AR>. The current measured value is frozen. Thus, the
<AR> key can also be used as a "hold function" to freeze the measured val-
ues. Press <RUN/ENTER> to start the AutoRead measurement. During the
AutoRead measurement, AR flashes on the display until a stable measured
value is reached.
Temperature
measurement The measuring instrument automatically measures the temperature of the sample with the integrated temperature probe of the conductivity measuring
cell (display shows TP).
AutoRange
measuring range
selection
There are several measuring ranges available for oxygen measurements.
If a measuring range limit is exceeded, AutoRange causes the measuring in-
strument to change automatically to the next measuring range.
Salinity
correction The oxygen concentration measurement of seawater requires a salinity cor- rection. The portable instrument Oxi 315i calculates the measured value us-
ing a salinity value of 30.0. Press the <RUN/ENTER> key while pressing the
<M> key to switch the salinity correction on and off. While the salinity correc-
tion is switched on, the function display Sal appears on the display.
lPress the <>key.
Display test appears briefly on the display.
The relative slope for the sensor type that was just connected subse-
quently appears for approx. one second.
After this, the measuring instrument automatically switches to the mea-
suring mode. The display shows the relevant measured value.
<M> <M>
<M>
Oxygen
concentration
Oxygen
saturation
Oxygen
partial pres-
sure mbar
mg/l
%

Calibration Oxi 315i
6
Calibration
Separate
calibration of
CellOx 325 and
DurOx 325
The portable instrument Oxi 315i enables the two sensor types, CellOx 325
and DurOx 325, to be calibratedseparately from one another. The calibration
of a specific sensor type does not affect the calibration of any other type of
sensor. When connecting a sensor, the calibration data stored for the respec-
tive sensor type are automatically used.
Calibration proce-
dures The calibration is performed in water vapor-saturated air. Use the air calibra- tion vessel OxiCal®-SL (for CellOx 325) or OxiCal®-D (for DurOx 325) for the
calibration.
Sensor evaluation After the calibration, the measuring instrument evaluates the current status
of the sensor against the relative slope. The evaluation appears on the dis-
play. Therelative slope has no effect on themeasuring accuracy. Lowvalues
indicate that the electrolyte will soon be depleted and the probe will have to
be regenerated.
Display Relative slope
S = 0.8 ... 1.25
S = 0.7 ... 0.8
S = 0.6 ... 0.7
E3
Invalid calibration
S < 0.6 or S > 1.25

Oxi 315i Resetting to default settings
7
Oxygen calibration procedure:
Resetting to default settings
Default
settings The following settings are reset to the status on delivery when a reset is per- formed (initialized):
Note
During a reset, the relative slope for the sensor types CellOx 325 and
DurOx 325 are reset together. They cannot be reset separately.
Reset procedure:
lKeep a suitable air calibration vessel ready.
lConnect the D. O. probe to the measuring instrument.
lPut the D. O. probe into the air calibration vessel.
lPress the <CAL> key. The oxygen calibration mode appears (display
shows O2CAL).
lPress <RUN/ENTER>. The AutoRead measurement begins.
lIf the measured value is stable, the instrument displays the value of the
relative slope and the sensor evaluation.
lSwitch to the measuring mode with <M>.
6
7
1
AL
C
O
°
C
TP
Cal
6
7
1
88
0
O
°
C
TP
Cal
AR
S
lPress <CAL> while pressing the <RUN/ENTER> key.
lPress<RUN/ENTER> to reset the measurement parameters. The instru-
ment changes to the measuring mode.
nI
I
O

Technical data Oxi 315i
8
Technical data
Dimensions
and weight
Mechanical
structure
Electrical
safety
Test certificates
Ambient
conditions
Measuring ranges/
resolutions with
oxygen sensor,
CellOx 325
Measuring ranges/
resolutions with
oxygen sensor,
DurOx 325
Length [mm] 172
Width [mm] 80
Height [mm] 37
Weight [kg] approx. 0.3
Type of protection IP 66
Protective class III
cETLus, CE
Storage - 25 °C ... + 65 °C
Operation -10 °C ... + 55 °C
Climatic class 2
mg/l % mbar
Measuring
range I
Resolution
0 ... 19.99
0.01 0 ... 199.9 0.1 0 ... 199.9 0.1
Measuring
range II
Resolution
0 ... 90.0
0.1 0 ... 600 10 ... 1250 1
mg/l % mbar
Measuring
range I
Resolution
0 ... 19.9
0.1 0 ... 199 10 ... 199 1
Measuring
range II
Resolution
0 ... 90
10 ... 600 10 ... 1250 1

Oxi 315i Technical data
9
Accuracy
(± 1 digit)
Correction
functions
Power
supply
Guidelines
and norms used
Concentration [mg/l] ± 0.5 % of the measured value
at an ambient temperature of 5 °C ... 30 °C
Saturation [%] ± 0.5 % of the measured value
when measuring in the range of ± 10 K
around the calibration temperature
Partial pressure [mbar] ± 0.5 % of the measured value
at an ambient temperature of 5 °C ... 30 °C
Temperature
compensation < 2 % at 0 ... 40 °C
T [°C] ± 0.1
Salinity correction Can be added, fixed salinity 30.0
Air pressure correction Automatic through installation of
pressure sensor in the range 500 ... 1100
mbar
Batteries 4 x 1.5 V alkali-manganese batteries,
Type AA
Operational life approx. 3000 operating hours
EMC EG guideline 89/336/EWG
EN 61326 A1:1998
EN 61000-3-2 A14:2000
EN 61000-3-3:1995
FCC Class A
Instrument safety EG guideline 73/23/EWG
EN 61010-1 A2:1995
Climatic class VDI/VDE 3540
Type of protection EN 60529:1991

Technical data Oxi 315i
10
FCC Class A Equipment Statement
Note: This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to Part15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.