Basic Operation
Basic Operation
Page 26
50081_Operation.fm
3.2.3.2 Daily Start-up
Even though the delivery tube has an anti-diffusion tip, titrant in the delivery line can be
slightly diluted or contaminated when electrodes are in storage solution (tap water, or
water with weak bleach solution). Bubbles may form due to titrant outgassing. Diluted
titrant and air bubbles can be purged with a manual empty/fill cycle prior to first run on a
daily basis, or after a lengthy idle period.
A manual flush cycle uses only 5 mL of titrant.
1. From the Titrant menu, press
6 to access Burette Functions.
2. Press
2 to empty the burette.
3. When the burette empties at least half of its contents, press
STOP, then press 1 to refill
the burette.
3.2.4 Electrodes Menu
The Electrodes menu provides access to the electrode cleaning and conditioning
procedure, adjustable parameters, direct measurement, and electrode/temperature sensor
functions.
• Title bar—displays Electrodes.
• Method—indicates the method currently selected.
• Connect electrodes—allow the user to connect the electrode.
• Disconnect electrode—allows the user to disconnect the electrode.
• Replace electrode—allows the user to replace the electrode.
• Check electrodes—identifies and displays the parameters of the electrode used in a
method.
• Electrode cleaning—guides the user through the electrode cleaning and
conditioning procedure.
• Display measurement—performs current measurement or displays the temperature,
based on the selected electrode.
• Electrodes tab—displays one of three electrode status icons, see Table 2.
Table 2 Electrode Status Icons
Sunny Icon—the electrode has been correctly installed.
Stormy Icon—there is a problem with the electrode installation.
Question Mark—a supervisory level problem exists within the method parameters
for the installed electrode.
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