Metrohm Multi-Mode Electrode pro - Manual (Page 29)

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5 Maintenance
6.1246.120 Multi-Mode-Electrode pro
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5 Maintenance
5.1 Small maintenance
Caution
When handling mercury please observe the relevant safety regulations
(see also Mercury Handling Guideline 8.000.5054EN).
In order to ensure that no mercury can escape into the environment,
the following procedures must always be carried out in a dry drip pan
(6.2711.030).
Mercury which escapes into the drip pan must be completely collected.
Larger amounts can be poured out of the drip pan into a closed mer-
cury collection container. Small drops can be collected with the mercury
drop catcher (6.2406.000).
A small maintenance consists of the following tasks:
1. Removing the MME pro from the measuring head (see Chapter 5.1.1,
page 21).
2. Refilling mercury (see Chapter 3.3, page 14).
3. Replacing the capillary (see Chapter 5.1.3, page 23).
4. Replacing the needle (see Chapter 5.1.4, page 26).
5. Adjusting the needle valve (see Chapter 3.5, page 16).
5.1.1 Removing the MME pro from the measuring head
Note
Before you remove the MME pro from the measuring head, make sure
that the electrode is switched off.
1 Disconnecting the inert gas supply
￭ Disconnect the inert gas tubings from the connectors (1-8) and
(1-12).
2 Disconnecting the electrode cable
￭ Pull off the electrode cable together with the adapter from the
connector (1-13).