XS OXY Series User manual

OXY 70 _ Ver. 1.0 _ 02/2017
Serie OXY
Portable oximeter OXY 70
Optical sensor
%O2/ mg/l / Temp. / mbar
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SUMMARY
Content Index
1. Description of the instrument.......................................................................................................1
1.1 Display LCD................................................................................................................................1
1.2 Connections for the probe and computer...................................................................................1
1.3 Keypad........................................................................................................................................2
1.3.1 Keypad operations ...............................................................................................................2
1.3.2 Switching on the instrument.................................................................................................2
1.3.3 Switching off the instrument.................................................................................................2
1.3.4 Auto power off ......................................................................................................................2
1.4 Functions of the keys..................................................................................................................3
2. Information about oxygen probe LDO70.....................................................................................4
2.1 Measuring principle ....................................................................................................................4
2.2 Probe Storage.............................................................................................................................4
3. Calibration of the oxygen sensor.................................................................................................5
3.1 Calibration in air at 100%...........................................................................................................5
3.2 Calibration with zero oxygen standard.......................................................................................5
3.3 Calibration interval......................................................................................................................6
3.4 Due calibration –GLP function...................................................................................................6
3.4.1 Date and time of the last calibration –GLP function............................................................6
4. Dissolved oxygen measurement..................................................................................................7
4.1 Before starting ............................................................................................................................7
4.2 Methods of measurement...........................................................................................................7
4.3 Making the measurement...........................................................................................................7
4.4 Compensation of the barometric pressure.................................................................................7
4.5 Salinity compensation (manual).................................................................................................8
4.6 Automatic temperature Compensation ( ATC) ...........................................................................8
5. Maintenance of the probe LDO70 ................................................................................................8
5.1 Replacing the luminophore.........................................................................................................8
6. Error messages..............................................................................................................................9
7. Restore to factory default setting................................................................................................9
8. Parameter setting.........................................................................................................................10
8.1 Parameters of the setup menu and factory default settings ....................................................10
8.2 Setup Menu ..............................................................................................................................11
9. Replacing the batteries...............................................................................................................11
10. Datalogger function.....................................................................................................................12
10.1 Save the data Manually............................................................................................................12
10.2 Save the dataAutomatically.....................................................................................................12
10.3 Recall of the saved data...........................................................................................................12
10.4 Clear Memory...........................................................................................................................12
11. USB connection...........................................................................................................................13
11.1 System requirements for software DataLink 70.......................................................................13
11.2 Software installation .................................................................................................................13

SUMMARY
11.3 USB connection........................................................................................................................13
12. Calibration of temperature sensor.............................................................................................14
12.1 Useful information.....................................................................................................................14
12.2 Calibration procedure...............................................................................................................14
13. Technical specifications .............................................................................................................15
14. Accessories and spare parts......................................................................................................16
15. Disposal of electronic devices...................................................................................................16

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OXY 70
1. Description of the instrument
1.1 Display LCD
1.2 Connections for the probe and computer
In the table below, are the connections for the probe and data transfer:
Model
Description
LDO 70 probe connection
DIN multipin –Connection for optical oxygen probe LDO70/2mt,
LDO70/10mt, with built in temperature sensor
USB port
USB port for data transfer to the computer and external power supply
Type of parameter
Actual value
Stability indicator
Points of calibration
Temperature probe
connected (ATC)
Temperature value
Actual Time
Number of data in memory

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1.3 Keypad
OXY 70
1.3.1 Keypad operations
Momentary press <1,5 seconds , Long press >1,5 seconds.
1.3.2 Switching on the instrument
Press to power on the instrument: The display shows all the segments → the firmware version and
the internal settings → measurement in the last selected mode.
1.3.3 Switching off the instrument
In the measurement mode, press and hold for 3 seconds to turn off the instrument.
1.3.4 Auto power off
This meter powers off automatically after 20 minutes of inactivity. To deactivate auto power-off go to the
parameter P6.8 of setup menu and select Off.
On Auto power off enabled
Off Auto power off disabled
During calibration and setup, press to exit and return to measurement mode, then press for 3 sec. to switch off.
During auto data logging, auto power off is disabled permanently.
Note:

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1.4 Functions of the keys
Key
Press
Description
Momentary
press
With the meter turned off, press this button to turn it on
During measurement: press to switch on/off the backlight
Long press
During measurement: press for 3 seconds to turn off the instruments
Momentary
press
During measurement: press to enter in calibration
During calibration or setup: press to exit and turn to measurement mode
Momentary
press
Press to change measurement mode between: %O2mg/l mbar
Momentary
press
During measurement: press to enter setup
During calibration: press to confirm when stable
During setup: press to select/confirm the program
Momentary
press
During measurement: press to save the data into memory
Momentary
press
During measurement: press to Recall Memory data
Long press
When working with manual temperature compensation (MTC), to change the
temperature value, keep pressing this button until the temperature value starts
flashing, adjust the value with these keys and press to confirm
Momentary
press
During Recall Memory (RM): press to scroll between the saved data
During setup: press to scroll in setup menu
In setup parameter: press to change the value

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2. Information about oxygen probe LDO70
The LDO70 probe uses luminescence optical technology for dissolved oxygen measurements in water.
This type of probe has many advantages compared to classical polarographic type sensor, some of these
are:
Zero polarization time, the instrument is always ready
No shaking of the sample because there is no oxygen consumption
No electrolyte in the membrane
No interference with other gases (ex. CO2)
Reduced maintenance time
Very fast response time
Accurate even with small sample volumes
Stable and accurate measurements even at low dissolved oxygen readings
LDO70 sensor
2.1 Measuring principle
On a membrane permeable to oxygen has been fixed a chemical substance called luminophore. Inside
the sensor a light source pulses a light of blue colour that is reflected from the luminophore on an inner
photocell. When the oxygen permeating through the membrane comes in contact to the luminophore it
modifies the blue light in proportion to the partial pressure of the oxygen. This variation is read by the
photocell which generates a proportional electrical signal.
2.2 Probe Storage
When the probe is not in use, store it in protective cap containing sponge dampened with distilled water.
In this way, the membrane remains protected and moisturized, ready for use.
Membrane on which is
fixed the Luminophore
O-ring

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3. Calibration of the oxygen sensor
The luminophore of the optical sensor is subject to aging and wear, so you need to calibrate it regularly in
the air.
3.1 Calibration in air at 100%
The ordinary calibration is made at 100% in air.
Turn the instrument on, rinse the probe with distilled water, dry thoroughly the probe with a paper towel
and proceed as follows:
1) Place the probe in the air with the membrane downwards and wait 2 minutes.
2) Press to start the calibration process, the upper display will flash "CAL" and the lower right
corner shows "100".
3) When the reading is stable and appears icon, press button to confirm, the display
shows End and the meter enters in measurement mode.
The oximeter is calibrated and ready for use.
3.2 Calibration with zero oxygen standard
Normally it is sufficient to calibrate the instrument in the air at 100% as explained previously. However in
some cases it may also be necessary to calibrate at 0%, for example when:
You change the probe or luminophore with a new one
The probe is not used for long period
The instrument does not calibrate at 100%, in which case calibrate before at 0%
The instrument does not measure correctly
For the calibration at 0% proceed as follows:
Turn the instrument on, rinse the probe with distilled water, dry thoroughly the probe with a paper towel
and proceed as follows:
1) Put the probe in the zero oxygen standard and wait 5 minutes.
2) Go to the parameter P5.1 of setup menu, press the key to start the calibration process, the
upper display will flash "CAL" and the lower right corner shows "0", gently shake the probe in the
standard.

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3) When the reading is stable and appears icon, press the button to confirm, the display
shows End and the meter enters measurement mode.
Perform also Calibration in air at 100%. The calibration remains in memory even after the instrument is
turned off.
3.3 Calibration interval
The time interval between two calibrations (100% in air) depends on the type of sample, the efficiency of
the sensor and the accuracy sought, it is usually necessary to calibrate the meter at least once a week, for
greater accuracy calibrate the instrument more frequently.
You must recalibrate the instrument if occurs one of the following conditions:
New probe or unused for long time
After replacing the luminophore
3.4 Due calibration –GLP function
On this instrument, you can set an expiration of calibration, after
which the instrument displays an error message, Er 7, and does
not allow new measurements until a new calibration is performed
at 100% in air.
By default this feature is disabled. To activate go to the parameter
P5.1 of setup menu, and set the number of hours ("H00") or days
("d00") indicating the expiration of the calibration. To turn it off,
select "no".
3.4.1 Date and time of the last calibration –GLP function
To check the date and time of last calibration access parameter P5.4 of setup menu, if it's been a long
time then recalibrate the instrument in air at 100%.
If the key is pressed when the reading is not stabilized yet, Er2 will appear on the display.
Note:
If we set d02 in P5.3 of setup menu, it means that the instrument will work for 2 days, after which you have to recalibrate in
order to make a new measurement. The same applies for the hours.
Example:

DO

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4. Dissolved oxygen measurement
4.1 Before starting
In order to reduce measurement errors and achieve the greatest possible accuracy, observe the following
rules before you begin:
The sensor must be calibrated
The sensor must be vertical with the membrane downwards
Remove the protective cap
The sensor must be at the same temperature of the sample to be analysed, if necessary leave the
probe immersed in the sample until the thermal equilibrium is reached
4.2 Methods of measurement
This instrument can work in two measurement modes:
Dissolved O2Saturation expressed in %
Dissolved O2Concentration expressed in mg/L, equivalent of ppm
mg/L = ppm
During measurement press key to change measuring method.
4.3 Making the measurement
Remove the electrode from the protective cap, rinse it with distilled water, blot with paper towels and
immerse in the solution to be analysed, stir gently and wait until the stability of value, when the icon
appears on the display, take the reading.
4.4 Compensation of the barometric pressure
Since the measurement of the partial pressure of dissolved oxygen is also related to barometric pressure,
this instrument, thanks to the integrated barometric sensor, is able to compensate each minimum
variation.
To view the barometric pressure measured by the instrument, press the key during measurement
and scroll through the measurement parameters: %O2mg/L mbar.

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4.5 Salinity compensation (manual)
The salinity of the sample to be measured influences the dissolved oxygen partial pressure.
For a correct measurement you must set the salinity value of the sample. If you make oxygen
measurements on salt water or sea water it is important to correct the measurement by setting the salinity
value indicative of the sample.
The value set by default is 0 ppt, to change access to P5.2 parameter of the setup menu and set the
desired value between 0 ... 50ppt.
The average salinity of sea water is 35ppt.
4.6 Automatic temperature Compensation ( ATC)
The measurement of the partial pressure of the oxygen is strongly influenced by temperature. This
instrument allows you to compensate for the change of the measurement made by the temperature
thanks to a built in temperature sensor, the instrument will automatically recognize the presence and the
display shows the ATC icon. During the measurements it is good to always check that the measured
temperature is stable and aligned with the sample.
5. Maintenance of the probe LDO70
If the instrument does not calibrate or reading does not stabilize, it is necessary to perform a maintenance
of the probe in the following way:
1) Check that the luminophore is clean, in case rinse externally with water.
2) The luminophore must be intact, undamaged, and without holes.
3) Unscrew the luminophore and check that the inside is dry, free from condensation and infiltration.
If there is condensation or seepage, check the integrity of the O-ring seal of the luminophore and,
if necessary, replace it. Dry thoroughly with a paper towel and screw the luminophore ensuring an
airtight seal.
After the maintenance make a new Calibration in air at 100%.
If even after the maintenance the probe does not calibrate then replace the luminophore with a new one.
5.1 Replacing the luminophore
The efficiency of the luminophore decreases with wear to the point that the instrument is no longer able to
calibrate itself, in which case its replacement is necessary. To replace the luminophore proceed as
follows:
1) Unscrew the luminophore.
2) Check the integrity of the inside of the probe.
3) Replace the O-ring with the new one supplied with new luminophore.
4) Screw the new luminophore ensuring an airtight seal.
After the maintenance make a new Calibration of the oxygen sensor.

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6. Error messages
During calibration and measurement, the instrument displays error messages in case of problems:
Error messages
Error
Description
Solution
1
During calibration, the value is out of the
acceptable range
Calibrate at 0% with fresh standard
Check the integrity of the probe and
luminophore
Replace luminophore
2
During calibration appears when you
press the button with unstable value
Wait for icon
3
It appearsif during the calibration the
value does not stabilize within 3 minutes
Check the integrity of the probe and
luminophore
Replace luminophore
6
The reading is out of the measuring limits
Check the connection between the probe and
the instrument
Check the integrity of the probe
Perform a new calibration

Calibration expired
Perform a new calibration in air
8
The LDO sensor doesn’t communicate
with the instrument
Check the connection between the probe and
the instrument
Contact technical support
9
The built-in barometric sensor is not
working properly
Replace the batteries
Contact technical support
7. Restore to factory default setting
To restore the factory settings, access the parameter P5.5 of setup menu.
Press , the display will show NO flashing.
With the or keys choose Yes and confirm with the key.
This feature can be very useful in case of errors or when making incorrect calibrations and / or have
calibration problems.

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8. Parameter setting
During measurement mode press to enter in setup menu.
Press and keys to scroll setup menu: P5.0→P6.0
P5.0: Settings of the parameter Oxygen
P6.0: Settings of the meter
Press key to enter in the selected menu and to confirm the changes.
Press and keys to scroll the sub-menus and to change the values.
Anytime press key to exit from setup menu and to return in the measurement mode, the changes
made and confirmed with key will be saved.
8.1 Parameters of the setup menu and factory default settings
Parameter
Description
Display
Settings
Factory default
P5.1
Calibration at 0%
0
-
-
P5.2
Salinity compensation

0.0 - 50.0 ppt
0.0
P5.3
CAL Due

No-H00-d00
No
P5.4
Last calibration date and time
/
-
-
P5.5
Restore factory defaults

No - Yes
No
P5.6
Calibration of temperature sensor
/
± 5°C
-
P6.1
Temperature measuring unit
/
°C - °F
°C
P6.2
Backlight duration

1 - 2 - 3 - On
1 minute
P6.3
Data recording interval
/
hh:mm
0:00
P6.4
Date setting
/
-
-
P6.5
Time setting
/
-
-
P6.7
Clear saved data

No - Yes
No
P6.8
Auto Power-off

On - Off
On
During setup menu, the instruments cannot be switched off, you first need to exit from setup with key.
Note:

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8.2 Setup Menu
9. Replacing the batteries
The display shows the battery charge, when you get to the last bar replace the batteries with 3 alkaline
batteriesAA1.5V, or if you are using rechargeable batteries, recharge them externally.
Avoid making measurements with dead batteries.
If the instrument is to remain unused for an extended period, remove the batteries and leave it without.
Main Menu
P5.1 Calibration at 0%
P5.2 Salinity compensation
P5.3 CAL Due
P5.4 Last calibration data
P5.5 Restore factory defaults
P5.6 Calibration of temperature sensor
Sub-menu of parameter Oxygen
P6.1 Temperature measuring unit (°C-°F)
P6.2 Backlight duration
P6.3 Data recording interval
P6.4 Date setting
P6.5 Time setting
P6.7 Clear saved data
P6.8 Activate / Deactivate auto power-off
Sub-menu of the meter settings
P5.0
DO
P6.0

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10. Datalogger function
10.1Save the data Manually
When the reading is stable, press the key, the display shows the M+ icon together with the number
of the memory, and the reading is saved in the memory.
The function of manually saving does not work if you set a capture range. Set "00.00" in the parameter
P6.3 of setup menu to disableAuto data logging.
10.2Save the data Automatically
Set the acquisition interval in the parameter P6.3 of setup menu, the display shows the icon at this
point the instrument is ready for automatic recording. When you press the button (short press), the
display will flash the icon and the instrument starts recording the values at the interval chosen.
To stop automatic recording, press the button, the icon stops blinking.
10.3Recall of the saved data
During measurement press to recall the last saved memory. The meter will show RM icon and the
number of the saved data. Press and keys to scroll between the memory, long press these
keys to speed up the scroll.
To exit from memory recall and return to measurement press button once.
10.4Clear Memory
To clear the memory go to the parameter P6.7 of setup menu, select YES and confirm with key.
Before emptying the memory make sure you have already downloaded the data on your computer.

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11. USB connection
11.1System requirements for software DataLink 70
Windows XP or higher - Microsoft Excel 2000 or higher –CD rom –USB port
11.2Software installation
Connect the instrument to the computer only after having installed the drivers and DataLink 70 software.
Insert the CD into the computer's CD drive and follow the wizard to install, in order:
USB port Driver
DataLink Software 70
The software DataLink 70 is available freely from www.xsinstruments.com
11.3USB connection
Turn on the instrument, connect the USB cable to the instrument and the computer.
Open the DataLink 70 software, the instrument will connect automatically in a few seconds, the display
will show icon and on the software it will appear the model and the serial number of the instrument.
Note: For a second connection it is necessary to close and reopen the software DataLink 70.

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12. Calibration of temperature sensor
12.1 Useful information
The NTC temperature sensors used are very accurate and stable over time
All instruments are pre-calibrated and normally does not require any further adjustment even after
many years
However, in case of reading errors it is possible to make an adjustment of ± 5 °C
12.2 Calibration procedure
Connect the temperature sensor to the instrument, immerse the probe into a thermostatic bath
(pre-thermostated) together with the reference thermometer.
Wait 10 minutes for the stability, if the reading is equal to the reference sensor ± 0.5 °C then it is not
necessary to perform any calibration, otherwise access the parameter P5.6 of setup menu.
Press the key to enter the calibration, the display will show the temperature value measured at that
time.
Press the and buttons to adjust the temperature value, press the button to confirm.
Press the button to exit and return to measurement mode, the meter will save the adjustments
made.
To restore the values of temperature to the factory settings, access the parameter P5.5 of setup menu,
select "YES" and press .

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13. Technical specifications
Technical specifications
OXY 7 (polarographic sensor)
OXY 70 (optical sensor)
Dissolved Oxygen measuring range
0,00…19,99 mg/l-ppm / 20,0…
0,00…19,99 mg/l-ppm / 20,0…50,0 mg/l-ppm
Resolution
0,01 / 0,1
0,01 / 0,1
Accuracy (with sensor)
± 1,5% F.S.
± 0,2 up to 10 mg/l-ppm
± 0,3 from 10 to 20 mg/l-ppm
± 5% from 20 to 50 mg/l-ppm
Oxygen saturation measuring range
0,0…199,9 % / 200…400%
0,0…199,9 % / 200…400%
Resolution
0,1 / 1 %
0,1 / 1 %
Accuracy (with sensor)
± 10%
± 10%
Oxygen points of calibration
1 o 2 automatic
1 o 2 automatic
Barometric air pressure measuring range
0,0…1100 mbar
0,0…1100 mbar
Resolution
1 mbar
1 mbar
Accuracy
± 0,5%
± 0,5%
Automatic air pressure compensation
Yes
Yes
Temperature measuring range
0,0… 60,0 °C
0,0… 60,0 °C
Resolution
0,1 °C
0,1 °C
Accuracy
± 0,5 °C
± 0,5 °C
Automatic and manual temperature compensation
Yes
Yes (only automatic)
Salinity measuring range
0…50 ppt
0…50 ppt
Salinity compensation
Yes manual
Yes manual
GLP system
No
Yes
Display
LCD
LCD backlight
Data memory
No
Man / Auto 500 Data with date and time
Data logger function
No
Yes
Date and time
No
Yes
Memory data of calibration
No
Yes
CAL DUE (calibration timer)
No
Yes
IP protection class
Waterproof IP 57
Waterproof IP 57
Auto power off
Yes (after 20 min)
Yes (after 20 min)
Inputs
BNC / RCA (cinch)
DIN multipin
Communication interface
No
USB
Power supply
3 x 1,5V battery AA
3 x 1,5V battery AA
AC/DC power with USB cable
Battery life
From 300 to 500 hours
From 300 to 500 hours
Dimensions / weight only meter
86 × 196 × 33 mm / 295 g
86 × 196 × 33 mm / 300 g
Dimensions / weight with carrying case
385 x 300 x 115 mm / 1720 g
385 x 300 x 115 mm / 1725 g
Specifications subject to change without notice

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14. Accessories and spare parts
Code
Description
50010342
Optical sensor LDO70/2MT with 2 meter cable
50010352
Optical sensor LDO70/10MT with 10 meter cable
50010362
Replaced membrane LDO for sensor LDO70/2MT and LDO70/10MT
50010372
Steel armature for dip immersion sensors LDO70/10MT
50010272
Standard zero (0) Oxygen, single use, kit of 5 bottles
for DO7/3MT, LDO70/2MT, LDO70/10MT
50010292
Standard zero (0) Oxygen, single use, 1 bottle for DO7/3MT, LDO70/2MT, LDO70/10MT
For more accessories and spare parts visit the website www.xsinstruments.com
15. Disposal of electronic devices
The electrical and electronic equipment marked with this symbol cannot be disposed of in
public landfills.
According to the UE Directive 2002/96/EC, the European users of electrical and electronic
equipment can return it to the dealer or manufacturer upon purchase of a new one.
The illegal disposal of electrical and electronic equipment is punished with an administrative fine.