Lovibond SensoDirect Oxi200 User manual

SensoDirect Oxi200
Dissolved Oxygen Meter
Operating instructions
GB

2
Declaration of CE-Conformity
The manufacturer: Tintometer GmbH
Schleefstraße 8 a
44287 Dortmund
Deutschland
declares that this product
Product name: SensoDirect Oxi200
with all optional items conforms to the following regulations:
EMC EN 55 022 : 6 / 1993 class B
EN50082-1(EN61000-4-6,
EN 61000-4-4, EN 61000-4-3,
EN 61000-4-2)
The product conforms to the regulations of the EMC Directive
89/336/EEC and 73/23/EEC.
Dortmund, March 12, 2003
Cay-Peter Voss,
Managing Direc-

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Table of Contents Page
1. Scope of delivery ..............................................................4
2. System description ............................................................4
3. Connections ......................................................................6
4. Display ..............................................................................6
5. Keypad..............................................................................8
6. Startup ..............................................................................8
7. Measurement...................................................................10
8. Conguration of the unit...................................................10
8.1 Resolution of display for oxygen measurement ................11
8.2 Zero point temperature oset...........................................11
8.3 Salinity: salinity correction ................................................12
8.4 Display of sensor status ..................................................12
8.5 Pressure Absolute, display of absolute pressure .............13
8.6 Selection of temperature unit °C /°F.................................13
8.7 Selection of unit for oxygen partial pressure .....................13
8.8 “Power o”: automatic unit switch-o ..............................13
9. Oxygen measurement .....................................................14
9.1 Absolute pressure............................................................14
9.2 Salinity correction.............................................................15
10. Calibration of oxygen measurement ................................15
10.1 Performing calibration ......................................................15
11. Oxygen sensor.................................................................16
11.1 Technical data..................................................................16
11.2 Operating notes...............................................................17
11.3 Design of the sensor........................................................18
11.4 Care and maintenance.....................................................19
12. Result memory ................................................................21
12.1 Storing results..................................................................21
12.2 Displaying stored results ..................................................21
12.3 Deleting stored results .....................................................21
13. Error messages and troubleshooting................................22
14. Technical data..................................................................23
15. Accessories .....................................................................26

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1. Scope of Delivery
Standard:
• Lovibond®SensoDirect Oxi200
• Measuring cell
• Batteries, 4*AA 1,5 V Cells
• Operating instructions
Set:
• Lovibond®SensoDirect Oxi200
• Batteries, 4*AA 1,5 V Cells
• Measuring probe
• Carrying case
• Operating instructions
2. System description
The Lovibond®SensoDirect Oxi200 is a sturdy, water-
tight handheld meter designed for daily measurements
in the area of eld or laboratory analysis.
It is used to measure oxygen concentration in surface
waters and groundwater as well as for waste water
and service water analysis.
The system complies with the requirements in EN
60529 relating to protection class IP67 and water-
proof/dustproof properties.
The permanent protective plating on the unit serves
not just as impact protection but also as a storage
compartment for the sensor and as an anti-slip device
when the meter is used in an upright position.

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Microprocessor technology and 4*AA 1,5 V batteries
allow unit operation without battery change for 12,000
hours or more.
A „Low Bat” indicator in the display shows the user
when it is time to change the batteries.
The required temperature compensation for the system
is performed automatically following connection of the
temperature sensor (NTC, 10 kOhm) that is integrated
as standard in the Tintometer oxygen sensor.
The AUTO HOLD feature enables the user to identify
stable results and call them up on the display.
The standard MEAS measuring function is for conti-
nuous measurement of oxygen concentrations, partial
pressures or saturations.
The absolute atmospheric pressure is measured in the
unit and is automatically used, for among other things,
calculation of the oxygen partial pressure or calibration
of the system.
The integrated automatic salinity correction feature is
based on the „International Oceanographic Tables“ and
is user-selectable in the range from 0% to 70% via the
conguration function of the unit.
The system is calibrated using the oxygen in the air.
A sensor evaluation is automatically shown in the
display (or can be called up via the menu) after each
calibration.
An internal memory for 20 results is integrated in the
unit as standard. The memory stores location, result
and temperature.
The memory is called up via the display.

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3. Connections
Oxygen sensor

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4. Display
Main Display: Result or user
prompt
[mmHg] Oxygen partial pressure
in mmHg
[hPa] Oxygen partial pressure
in hPa
[mg/l] Oxygen concentration
[%O2] Oxygen saturation
Secondary
display: Result - temperature
or user prompt
[%] Percent (sensor evaluation)
[°C/°F] Temperature unit
[Δ
!
]Warning index - battery
[SAL] Salinity correction on/o
[OK] Measuring signal stable
[CAL] Auto. oxygen calibration
[hPa] Absolute air pressure

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5. Keypad
[Meas] Continuous measurement -
standard
[Hold] Auto-Hold: Automatic
retaining of stable result
[On/O] On / O
[▲] [▼]Display change: partial pressure,
concentration or saturation. Leaf
through menu or display
[Rcl] Display of stored results
[Cal] Calibration mode
[Store] Storage of current result or acceptance of
unit conguration
[Menu] Unit conguration
6. Startup
The unit is supplied with integrated batteries as stan-
dard and is therefore ready for immediate use. You have
to unscrew the unit to insert or change the batteries.
When inserting the batteries, ensure correct polarity!

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Screw the unit back together carefully without exerting
too much pressure on the gasket seal.
If the [Δ
!
] symbol appears together with „bAt” in the
lower section of the display, this means that the bat-
teries are nearly empty and need replacing.
However, the unit will continue to function for a certain
period of time.
If „bAt“ appears in the upper section of the display, this
means that the batteries are completely empty.
Only use the matching Tintometer oxygen sensors!
Other sensors may cause serious damage to the meter
and the sensor.
The sensor or temperature sensor must be plugged in
before the unit is switched on.
Switch the unit on via the [On/O] key.
The system must be calibrated when the system is
rst used.
Following measurement, please switch the unit o
using the [On/O] key.
See the enclosed Operating Instructions for more
detailed information on storage and care of the sen-
sors.

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7. Measurement
Measuring mode MEAS
After the unit is switched on, it is automatically in the
standard measuring mode (MEAS).
You can switch to the standard MEAS measuring mode
by pressing the [Meas] key.
The display shows the current, possibly still uctuating
result and [Meas].
If the result is stable, the [ok] arrow appears in the
display.
Measuring mode HOLD
Pressing the [Hold] key takes you into the AUTO HOLD
measuring mode.
In this mode, the recorded result is checked by the
system in line with the predened stability criteria until
these criteria are met.
The display shows Auto/HOLD in alternating mode
together with the result.
Once a stable reproducible value is present, the result
is shown permanently in the display („frozen”).
The display also shows HOLD and the temperature.
If you press the [Hold] key again, the measuring cycle
starts again and runs until the stability criteria are
met.
8. Conguration of the unit
To congure the unit, press the [Menu] key.
The rst menu item appears.