PCE Instruments PCE-DOM 10 Dissolved Oxygen Meter User Manual
- June 15, 2024
- PCE Instruments
Table of Contents
User Manual
PCE-DOM Series Oxygen Meter
Last change: 17 December 2021
v1.0
User manuals in various languages can be found by using our product search on:
www.pce-instruments.com 
Safety notes
Please read this manual carefully and completely before you use the device for
the first time. The device may only be used by qualified personnel and
repaired by PCE Instruments personnel.
Damage or injuries caused by non-observance of the manual are excluded from
our liability and not covered by our warranty.
- The device must only be used as described in this instruction manual. If used otherwise, this can cause dangerous situations for the user and damage to the meter.
- The instrument may only be used if the environmental conditions (temperature, relative humidity, …) are within the ranges stated in the technical specifications. Do not expose the device to extreme temperatures, direct sunlight, extreme humidity or moisture.
- Do not expose the device to shocks or strong vibrations.
- The case should only be opened by qualified PCE Instruments personnel.
- Never use the instrument when your hands are wet.
- You must not make any technical changes to the device.
- The appliance should only be cleaned with a damp cloth. Use only pH-neutral cleaner, no abrasives or solvents.
- The device must only be used with accessories from PCE Instruments or equivalent.
- Before each use, inspect the case for visible damage. If any damage is visible, do not use the device.
- Do not use the instrument in explosive atmospheres.
- The measurement range as stated in the specifications must not be exceeded under any circumstances.
- Non-observance of the safety notes can cause damage to the device and injuries to the user.
We do not assume liability for printing errors or any other mistakes in this
manual.
We expressly point to our general guarantee terms which can be found in our
general terms of business.
If you have any questions please contact PCE Instruments. The contact details
can be found at the end of this manual.
Device description
2.1 Technical specifications
Measurement function| Measurement range| Resolution|
Accuracy
---|---|---|---
Oxygen in liquids| 0 … 20 mg/L| 0.1 mg/L| ± 0.4 mg/L
Oxygen in the air (reference measurement)| 0 … 100 %| 0.1 %| ± 0.7 %
Temperature| 0 … 50 °C| 0.1 °C| ± 0.8 °C
Further specifications
Cable length (PCE-DOM 20)| 4 m
Temperature units| °C / °F
Display| LC display 29 x 28 mm
Temperature compensation| automatically
Memory| MIN, MAX
Automatic power-off| after about 15 minutes
Operating conditions| 0 … 50°C, <80 % RH.
Power supply| 4 x 1.5 V AAA batteries
Power consumption| approx. 6.2 mA
Dimensions| 180 x 40 x 40 mm (handheld unit without sensor)
Weight| approx. 176 g (PCE-DOM 10)
approx. 390 g (PCE-DOM 20)
2.1.1 Spare parts PCE-DOM 10
Sensor: OXPB-19
Diaphragm: OXHD-04
2.1.2 Spare parts PCE-DOM 20
Sensor: OXPB-11
Diaphragm: OXHD-04
2.2 Front side
2.2.1 PCE-DOM 10
3-1 Display
3-2 On / Off key
3-3 HOLD key
3-4 REC key
3-5 Sensor with diaphragm
3-6 Battery compartment
3-7 Protection cap
2.2.2 PCE-DOM 20
3-1 Display
3-2 On / Off key
3-3 HOLD key
3-4 REC key
3-5 Sensor with diaphragm
3-6 Battery compartment
3-7 Sensor connection
3-8 Sensor plug
3-9 Protection cap
Attention: The sensor of the PCE-DOM 20 is covered with a red protective cap which must be removed before measurement!
Operating instructions
When using the meter for the first time, the sensor of the oxygen meter must be filled with electrolyte solution OXEL-03 and then calibrated.
3.1 Changing units
To change the oxygen unit, press and hold the ”HOLD“ key for at least 3
seconds. You can select “mg/L“ or “%“.
To change the temperature unit, press and hold the “REC“ key for at least 3
seconds. You can select °C or °F.
3.2 Calibration
Before the measurement, the PCE-DOM 10/20 must be calibrated in fresh air.
First remove the grey protective cap from the sensor. Then switch on the test
instrument using the on/off key. The display then shows a measured value and
the current temperature:
The upper, large display shows the current measured value. Wait approx. 3
minutes until the display has stabilised and the measured value no longer
fluctuates.
Now press the HOLD key so that the display shows Hold. Then press the REC key.
CAL will flash in the display and a countdown will start counting down from
30.
As soon as the countdown is finished, the oxygen meter returns to normal measuring mode and the calibration is finished.
The oxygen meter should now display a measured value between 20.8 … 20.9 % O2
in fresh air.
Hint: Calibration works best when performed outdoors and in fresh air. If
this is not possible, the meter can also be calibrated in a very well
ventilated room.
3.3 Measurement of dissolved oxygen in liquids
After the calibration has been carried out as described in chapter 3.2, the
oxygen meter can be used to measure dissolved oxygen in liquids.
Press the UNIT key for three seconds to change the unit from %O2 to mg/l. Now
place the sensor head in the liquid to be measured and carefully move the
meter (sensor head) slightly back and forth within the liquid. The measurement
result can be read from the display after a few minutes.
Hint: In order to obtain a quick and exact measuring result, the meter
must be moved within the liquid at a speed of approx. 0.2 … 0.3 m/s. In
laboratory tests, it is recommended to stir the liquid in a beaker with a
magnetic stirrer (e. g. PCE-MSR 350).
After the measurement is completed, the electrode can be rinsed with tap water
and the protective cap can be placed on the sensor.
3.4 Measurement of atmospheric oxygen
After calibration, the oxygen meter can also be used to measure the
atmospheric oxygen content.
To do this, set the unit to O2%.
Note: This measurement function gives only an indicative measurement.
3.5 Temperature measurement
During the measurement, the oxygen meter displays the current medium
temperature.
To change the unit, press the REC button for at least 2 seconds to toggle the
unit between °C and °F.
**Note: This function is not available when the oxygen meter is in
memory mode.
3.6 Freezing data in the display
If you press the HOLD key during the measurement, the current display is
frozen. The hold icon then appears in the display.
3.7 Save measured data (MIN HOLD, MAX HOLD)
This function ensures that after activating this function, the minimum and
maximum measured values are saved in the display.
3.7.1 Save maximum value
Press and release the REC key. Then the REC icon appears in the display. When
you press the REC key again, the display shows REC MAX and as soon as the
measured value exceeds the maximum value, the maximum value is updated. If you
press the HOLD key, the MAX Hold function is terminated. Only REC appears in
the display.
3.7.2 Save minimum value
If the memory function was activated via the REC key, you can display the
minimum measured value on the display by pressing the REC key again. The
display will then also show REC MIN.
Pressing the HOLD key terminates the function and the REC icon appears in the
display.
3.7.3 Terminate memory mode**
When the REC icon appears in the display, this function can be cancelled by
pressing the REC key for at least two seconds. The oxygen meter then returns
to normal measuring mode.
Maintenance
4.1 First use
When using the oxygen meter for the first time, the sensor must be filled with
electrolyte solution OXEL-03 and then calibrated.
4.2 Maintenance of the sensor
If the meter can no longer be calibrated or the reading does not appear stable
on the display, the following points should be considered.
4.2.1 Testing the electrolyte
Check the condition of the electrolyte in the sensor head. If the electrolyte
is dry or dirty, the head should be cleaned with tap water. Then fill the
black cap with new electrolyte (OXEL-03) as described in chapter Feeler!
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4.2.2 Maintenance of the diaphragm
The Teflon diaphragm is capable of allowing oxygen molecules to pass through
it, this is how the oxygen meter can measure oxygen. However, larger molecules
cause the membrane to clog. For this reason, the diaphragm should be replaced
if the meter cannot be calibrated despite a new electrolyte. The diaphragm
should also be replaced if it has been damaged by an impact.
The procedure for changing the diaphragm is similar to that for refilling the
electrolyte.
Remove the black cap with the diaphragm from the sensor head. Clean the sensor
with tap water.
Fill new electrolyte fluid into the new cap with the diaphragm (OXHD-04). Then
screw the black cap back onto the sensor and finally perform the calibration
as described in chapter 3.2
4.3 Battery replacement
When the display shows this icon , the batteries must be replaced to ensure
proper operation of the oxygen meter. To do this, open the battery compartment
cover of the meter and remove the old batteries. Then insert new 1.5 V AAA
batteries into the meter. Make sure that the polarity is correct. After the
new batteries have been inserted, close the battery compartment.
Contact
If you have any questions, suggestions or technical problems, please do not hesitate to contact us. You will find the relevant contact information at the end of this user manual.
Disposal
For the disposal of batteries in the EU, the 2006/66/EC directive of the
European Parliament applies. Due to the contained pollutants, batteries must
not be disposed of as household waste. They must be given to collection points
designed for that purpose.
In order to comply with the EU directive 2012/19/EU we take our devices back.
We either re-use them or give them to a recycling company which disposes of
the devices in line with law.
For countries outside the EU, batteries and devices should be disposed of in
accordance with your local waste regulations.
If you have any questions, please contact PCE Instruments.
PCE Instruments contact information
Germany
PCE Deutschland GmbH
Im Lengel 26
D-59872 Meshed
Deutschland
Tel.: +49 (0) 2903 976 99 0
Fax: +49 (0) 2903 976 99 29
info@pce-instruments.com
www.pce-instruments.com/deutsch|
United Kingdom
PCE Instruments UK Ltd
Unit 11 Southpoint Business Park
Ensign Way, Southampton
Hampshire
United Kingdom, SO31 4RF
Tel: +44 (0) 2380 98703 0
Fax: +44 (0) 2380 98703 9
info@pce-instruments.co.uk
www.pce-instruments.com/english|
United States of America
PCE Americas Inc.
1201 Jupiter Park Drive, Suite 8
Jupiter / Palm Beach
33458 FL
USA
Tel: +1 561-320-9162
Fax: +1 561-320-9176
info@pce-americas.com
www.pce-instruments.com/us
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© PCE Instruments
References
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