Dansensor CheckPoint O2 User manual

PBI-320297-B
02/2014
CheckPoint O2
DEDA SV RU
FR ES
IT
EN PT

Dansensor A/S COPYRIGHT © PBI-320297-B 02/2014
CheckPoint O 2
Distributor Sales Service and Calibration
Topac Inc
231 CJC Highway
Cohasset
MA 02025
Tel [phone]
Fax[phone]
Email [email protected]om
internet www.topac.com

2 CheckPoint O2
PBI-320297-B 02/2014 COPYRIGHT © Dansensor A/S
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Dansensor A/S COPYRIGHT © PBI-320297-B 02/2014
CheckPoint O23
CheckPoint O2specifications
General:
• Min. 2000 measurements on new alkaline
batteries.
• Sample flow 90 - 140 ml/min standard.
• Auto power-off after 1 minute.
• Memory function for 10 measurements (also
after battery replacement).
• Display hold function (also after power off).
• Charging time for NiMH-battries: 3 hours
(auto off)
• Operational temperature: 0 - 40°C
• Humidity: <95% RH (non-condensing)
O2Sensor:
• Electrochemical
• Range: 0 - 100%
• Resolution: 0.1%
• Accuracy: 0.25% abs. + 2% rel.
• Temperature compensation:
< 2% rel. (steady state)
• Response time (T95): 15 sec.
• Expected sensor lifetime: 9 months
Recommended calibration interval: 6 months
Measuring system:
• Measuring time: 15 sec.
• Sample volume: approx. 23 ml
• Built-in pump max. -200 mbar vacuum,
expected life-time > 500 hours (120.000
measurements)
• Calibration: Air (20.9 % O2)
Cabinet:
• Weight: 0.5 kg
• Size: 74 x 63 x 135 mm (W x H x D)
• Class: IP53
• Material: Anodized aluminium
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10 Brugerguide DA CheckPoint O2
PBI-320297-B 02/2014 COPYRIGHT © Dansensor A/S
NOTER:

Dansensor A/S COPYRIGHT © PBI-320297-B 02/2014
CheckPoint O2EN User Guide 11
Safety precautions
WARNING!
Due to safety considerations the
needle (5) + (12) should always be
placed in the retainer on the CheckPoint unit
after measuring.
Use only the original external power supply
unit / charger when connecting to mains.
Using the wrong type can destroy the
CheckPoint unit. Use only the specified
battery type or an original rechargeable
battery pack.
If rechargeable batteries have been installed
in the CheckPoint, they must not be replaced
by ordinary batteries.
CheckPoint should be cleaned with a mild
detergent solution.
Operation
Start-up (1)
Press the key to switch on the CheckPoint.
When the CheckPoint switches on, the version
number of the installed software is shown briefly,
followed by the result of the latest measurement
(4).
Start/Stop measuring (2)
Press to start measuring. The built-in pump
starts to suck measuring gas through the needle.
The pump stops after 15 seconds, and the result
is shown.
Extended measuring
If a measuring period of more than 15 seconds is
required, it can be extended by pressing 
before the current measurement is complete.
Each time you press , a 15 second measuring
period is started.
Reduced measuring time
The measuring period can be reduced by
pressing while measuring is in progress.
Memory function 
CheckPoint remembers up to 10 measurements,
including the latest one. The small display (6)
shows the number of measured values stored. If
the display is off, 9 measurements and the latest
one are stored.
Clear memory
If the memory is full, it must be cleared before
new values can be stored. Press and keep it
down. After 2 seconds the memory is cleared,
and "0" is shown in the display (6), indicating
that the memory is empty.
Show collected measurements
Press , and the first collected measurement is
shown. Press again to show subsequently
collected measurements. While measurement
values are being shown, the display (6) flashes,
indicating the number of the collected
measurement. To leave the display of collected
measurements, press until all measurements
have been shown, or press to return directly
to the latest measurement. The display (6) stops
flashing when you leave the "show collected
measurements" function.
Replace collected measurement with new
measurement
When showing the collected measurements (the
display (6) is flashing), the measurement shown
can be overwritten by a new measurement. While
the collected measurement is shown, press to
start measuring. After measuring, the
measurement is stored in the memory location
shown.
EN

12 User Guide EN CheckPoint O2
PBI-320297-B 02/2014 COPYRIGHT © Dansensor A/S
O reading
2
[%]
time [sec]
T=0
Start value
T value
95
"True" value
T=15
(1. measurement) (2. measurement)
T=30
Difference
Difference = Start "True" valuevalue
T value = Start value (0.95*Difference)
95
What does “Response time (T95)” mean
According to the specifications on page 3 the O2
sensor has a Response time (T95) of 15 sec.
This means that when performing consecutive
measurements in areas with large differences in
the O2concentrations, the device will reach 95 %
of the “true” value during the first measurement
(15 sec.).
Example:
(See illustration below):
• Last measurement was performed in i.e.
20.9 % O2
• The following value to be measured is
1.0 % O2
• Difference is:
20.9 - 1.0 = 19.9 % O2
• The expected read-out value after first
measuring is:
20.9 - (0.95 * 19.9) = 2.0 % O2
Consequently this means that if there is a large
difference in the O2concentrations between two
consecutive measurements, multiple
measurements must be performed to obtain the
most accurate result.

Dansensor A/S COPYRIGHT © PBI-320297-B 02/2014
CheckPoint O2EN User Guide 13
O2sensor temperature sensitivity
Due to the sensor design the readout will be
affected when moving the device from cold to
warm temperatures or vice versa.
Normally for compensation to work properly the
device must be stabilized at the current ambient
temperature for some time (up to 1-2 hours).
However if you cannot wait for this time, use
short stabilizing time, for example 10-15 min.,
and perform an offset (20.9%) calibration of the
O2sensor right before each measurement series
until device has stabilized.
This will bring the calibration back in line with
current response.
Calibration
CheckPoint O2only has to be calibrated with
atmospheric air. If CheckPoint does not show
approx. 20.9 % O2(between 21.3 % and 20.5 %)
when measuring atmospheric air, it must be
calibrated with atmospheric air. Make sure that
only atmospheric air is sucked during calibration.
Start calibration (2) + (3) :
Press the key and hold it down. Press and
release both keys. During calibration the display
alternately shows “CAL.” and “20.9” for 45
seconds. CheckPoint has now been calibrated.
Stop calibration
Press to interrupt the calibration process.
External power supply/charger (14)
CheckPoint can be connected to an external
power supply/charger. When the power supply is
connected/disconnected, the display shows
"P.On" and "P.OF.", respectively. If CheckPoint is
fitted with ordinary batteries, they will be
disconnected. If CheckPoint is fitted with
rechargeable batteries, they will be recharged
automatically.
WARNING! Only connect the original
power supply.
CheckPoint messages
"P.On " Power on. External power supply
connected.
"P.OF. " Power off. External power supply
disconnected.
"Lo./BAt." Low battery voltage. Replace the
batteries, or connect the external
power supply/charger.
WARNING! When rechargeable
batteries are installed in the
CheckPoint, ordinary batteries must
NOT be installed.
CheckPoint error messages
"P.Er. "Power error. Error in the external
power supply. Power supply with
incorrect output voltage connected.
Remove the power supply
immediately.
CheckPoint cannot be switched off
before the incorrect power supply
has been removed.
"Er.x " Internal error. CheckPoint must be
forwarded for service.

14 User Guide EN CheckPoint O2
PBI-320297-B 02/2014 COPYRIGHT © Dansensor A/S
Moving the measuring hose inlet
Any technically gifted user can convert the unit
from a right-handed into a left-handed model and
vice versa.
Note: Handle the sensitive internal mechanical
and electronic components with care when
converting the unit.
Do as follows to convert the CheckPoint from a
right-handed model into a left-handed model or
vice versa:
1. Remove the two side plates (10) and the
battery cover (7).
2. Remove the needle retainer (8).
3. Switch the gas in and gas out screw joints (9)
without dismounting the hoses (remember to
fasten the joints using a tool)
4. Mount the side plates (7) and (10), starting
with the right-hand plate (be careful not to
squeeze the hoses)
5. Mount the needle retainer (9) in the opposite
side, and press it down until flush with the
side plate
6. Test/control: Switch on the CheckPoint, and
start measuring with atmospheric air (20.9
%). Block the gas inlet while measuring (e.g.
by removing the needle and putting your
finger on the end of the needle pen). The O2
value must not increase by more than 1 %. If
this is the case, check that the hoses have
been mounted correctly in accordance with
the drawing.
Battery replacement
When the CheckPoint using ordinary batteries
shows "Lo./BAt.", the batteries must be
replaced.
1. Unscrew the screw that secures the battery
cover (7) on the left side, and dismount the
cover.
2. Disconnect the connector (13) on the battery
pack.
3. Take out the battery pack, and replace the
batteries with 4 new alkaline batteries (type
AA).
4. Mount the battery pack again (lower/left
connector).
5. Connect the connector to the battery pack.
6. Mount the cover and screw (be careful not to
squeeze the wire)

Dansensor A/S COPYRIGHT © PBI-320297-B 02/2014
CheckPoint O2EN User Guide 15
Spare parts and accessories
Consumables
200717 Kit, needle pen incl. hose and fittings, Ser. Cpl.
200719 Kit, batteries, 4 pcs., type AA, Ser. Cpl.
200726 Kit, rechargeable battery pack, CheckPoint, Ser. Cpl.
220121 Needle kit, 0.5 mm (10 pcs.), Ser. Cpl.
280205 Needle kit, 0.5 mm (100 pcs.), Ser. Cpl.
280167 Needle kit, blunt (10 pcs.), Ser. Cpl.
310335 Filter, sample gas, 0.2μ, water trap (10 pcs.), Ser.Cpl.
Spare parts
200720 Pump, CheckPoint, Ser. Cpl.
200721 Kit, hoses, internal, Ser. Cpl.
200725 Kit, fittings, CheckPoint, Ser. Cpl.
330016 Sensor, O2EC, Ser. Cpl.
330021 Kit, adapter, Ø3.1/Ø2.2, Sensor O2EC Ser. Cpl.
330034 Hose, silicone, Ø4/7mm (10 pcs. x 70mm) Ser. Cpl.
330035 Tape, glazing (10 pcs. x 70mm) Ser. Cpl.
Optional equipment
310341 Adapter, AC/DC 7,5VDC, Multi, Ser. Cpl.
200678 Option, arm strap, CheckPoint

16 User Guide EN CheckPoint O2
PBI-320297-B 02/2014 COPYRIGHT © Dansensor A/S
NOTES: