Metrohm Multi-Mode Electrode pro - Manual (Page 38)

5.2 Large maintenance
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6.1246.120 Multi-Mode-Electrode pro
5.2 Large maintenance
Large maintenance consists of the following tasks:
1. Removing the MME pro from the measuring head (see Chapter 5.1.1,
page 21).
2. Emptying the mercury reservoir (see Chapter 5.2.2, page 30).
3. Removing the capillary (see Chapter 5.2.3, page 31).
4. Removing the needle (see Chapter 5.2.4, page 33).
5. Cleaning the electrode body (see Chapter 5.2.5, page 34).
6. Mounting the capillary (see Chapter 5.2.6, page 35).
7. Inserting the needle (see Chapter 5.2.7, page 37).
8. Filling in mercury (see Chapter 5.2.8, page 39).
9. Mounting the MME pro onto the measuring head (see Chapter 3.4,
page 16).
10. Adjusting the needle valve (see Chapter 3.5, page 16).
11. Testing the electrode function (see Chapter 3.6, page 18).
5.2.1 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).
5.2.2 Emptying the mercury reservoir
Caution
In this procedure mercury is used. Always carry out the following steps
in a dry drip pan.
To empty the mercury reservoir you need the following accessories: