Aquameter
™
Series Instruction Manual
10401-00188 Rev M
Calibrating
100%
Press [OK]
When calibration is complete, press the
OK
key then the
ESC
key repeatedly to return to
normal operating mode.
If a problem occurs during calibration, an error message will be displayed. Refer to
in section 10 for error message handling. If Error 09 persists when
calibrating a Galvanic DO sensor, replace the DO Electrode Membrane Cap.
If Error 02 persists when calibrating an Optical DO sensor, replace the Optical DO
Electrode Cap.
Remove the Probe from the calibration bottle, rinse thoroughly in fresh water, shake off any
excess and dry the outer sleeve with a soft cloth.
14.6. Calibrating the DO 100% Saturation Point in Moist Air
1. Wash the probe in fresh water, then shake off ensuring there are no droplets
adhering to the DO membrane.
2. Take an empty calibration bottle, rinse with fresh water, then empty it leaving the
inside wet but with no standing water.
3. Insert the Probe and wait until the temperature measurement is
completely
stable
.
This is very
important
. Temperature must be between 5ºC and 40ºC (41ºF - 104ºF).
4. Referring back to the screens shown in items 4 or 6 above (dependent on software
version), select
DO100%
5. Wait while the Aquameter carries out the calibration procedure.
6. When the ‘Calibrating 100%’ screen (shown above) is displayed, press OK then
ESC repeatedly to return to normal reading mode.
If a problem occurs during calibration, an error message will be displayed. Refer to
in section 10 for error message handling. If Error 09 persists when
calibrating a Galvanic DO sensor, replace the DO Electrode Membrane.
14.7. Replacing the Galvanic DO Electrode Membrane Cap
The Galvanic DO electrode membrane is a very thin sheet of special plastic, which is
permeable to oxygen. Oxygen molecules pass through this membrane into the Oxygen
sensor. The membrane is extremely delicate and is factory fitted into the DO Membrane
Cap. To ensure optimum performance, the DO Membrane Cap must be replaced every 1-2
months.
Never touch the plastic membrane as the oils in your skin will block the pores in the
membrane and stop it from working correctly.
To replace the DO Membrane Cap, follow these simple steps.
1. Remove the lower Probe sleeve.
© 2011 Aquaread Ltd.
www.aquaread.co.uk
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