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12
Operator Maintenance
See Section 2 for important notes.
AT WEEKLY INTERVALS:
a) Flush the cell with oil free water.
b) Stop sample and oil free water flow.
c) Unscrew and remove the cell cap. For instruments equipped with Manual
Cleaning Unit (MCU), unscrew the MCU instead.
d) Insert a suitable Cell Cleaning brush (Art. No. 77555) into the cell and clean it
with upwards and downwards motion through the entire length of the cell
several times.
e) Remove the Cell Cleaning brush and replace the cell cap.
f) Open clean water valve and allow oil free water to flow through the instrument
for a few minutes.
g) Observe that the display is showing "0" to "2". If not, clean again.
h) Examine the status of the desiccator (Chapter 10.4, TEST button). The
Desiccator status display indicates if the desiccator is worn out and working
insufficient. If the desiccator status is any other then OK, the desiccator should
be replaced. Additionally, the Measuring Cell Dew Point Temperature can be
checked. The Dew Point Temperature should be below 0°C, otherwise the
desiccator needs to be exchanged.
Insufficient desiccator performance could result in condensation inside the
measuring cell and wrong measurement and/or damage to optical
components. Desiccator can easily be exchanged. Just unscrew the
desiccator, replace the desiccator with a new one (Art. No. 79550). Make sure
to close the desiccator cap properly. Allow the new desiccator some time to
absorb the humidity inside the measuring cell. Please note that a desiccator
package should never be opened unless it is installed immediately.
j) Switch electric valve to SAMPLE setting.
Issue: 08.07.2015
DECKMA HAMBURG GmbH
Instruction Manual OMD-2008 (EV, FC, MCU Versions)
Page 21 of 28
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