Sutron TesiMod TP22, User Manual

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5-1
Maintenance and Servicing
5 Maintenance and Servicing
5.1 Front Panel
Only use a damp cloth to remove any dirt from the front panel.
5.2 Fuse
A semiconductor fuse is used to protect the device. Once the fuse has been tripped,
the device must be disconnected from the supply voltage to allow the semiconductor
fuse to regenerate. At an ambient temperature of 20 °C (68 °F), the regeneration
takes approximately 20 seconds. The higher the ambient temperature, the longer the
regeneration takes.
5.3 Battery
The built-in battery preserves the data in the CMOS-RAM and supplies the real-time
clock. The minimum battery life is 5 years, even under unfavorable operating condi-
tions. When the battery runs down, the message „Change battery“ is generated au-
tomatically.
We recommend you change the battery approximately every 4 years as part of the
regular maintenance work. A prepared battery including connector can be obtained
directly from Sütron electronic.
If the „Change battery“ message is detected too late, e.g. the real-time clock stopped
or shows the wrong date, data in the CMOS-RAM may have already been lost. For
this reason, after changing a battery, always check data such as passwords that can
be modified, parameters in the system variables, recipe data sets and entries in the
message system.
The semiconductor fuse cannot be replaced!