Metrohm 894 Professional CVS - Manual (Page 82)

6.2 Maintenance by Metrohm Service
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894 Professional CVS
6.2 Maintenance by Metrohm Service
Maintenance of the instrument is best carried out as part of an annual ser-
vice, which is performed by specialist personnel from Metrohm. A shorter
maintenance interval is recommended if you frequently work with caustic
and corrosive chemicals. Metrohm Service offers every form of technical
advice for maintenance and service of all Metrohm instruments.
6.3 Exchange the measuring head
Make sure that no determinations are underway when you exchange the
measuring head.
CAUTION
Leaking of chemical substances
Chemical substances can cause chemical burns and skin damage.
￭ Empty the tubings before you remove the measuring head.
￭ Tilt the measuring head arm up before you remove the measuring
head.
CAUTION
LED blinking pattern indicates standby potential
The electrodes may be damaged.
Check the blinking pattern of the "Status" LED. The measuring head
may not be removed while standby potential is being applied to the
electrodes (blinking pattern: on for long time - off for short time).
CAUTION
Stirrer motor is in operation
The stirrer motor may be damaged.
Switch off the stirrer motor before you remove or insert the measuring
head.