9.3.2 Battery Life
The Hydran M2-X’s battery is used to keep the real-time clock functioning and to
retain the historic data when the unit is not powered. The shelf life of the battery in
the Hydran M2-X is 2.5 years when the unit is stored at 25 °C (77 °F). If the Hydran
M2-X has been stored for more than one year, it is strongly recommended to replace
the battery before installation and powering-up.
The set points of battery alarms (see Setup > Alarms Setup > Battery Setup in
Section 3.3.2.4) are the following:
• Low alarm = 3.35V (or 2.75V for units before 2012).
• Low-Low alarm = 3.05V (or 2.45V for units before 2012).
When the Low alarm is generated, the battery must be replaced within a period
of three months. When the Low-Low alarm is generated, the battery must be
replaced immediately.
9.4 Periodic Maintenance
The person in charge of maintenance must already be familiar with the Hydran
M2-X to:
• Use and set the Hydran M2-X’s parameters with its keypad.
• Use the Perception software.
If not, reviewing the previous Chapters will help in performing maintenance
routines.
Before proceeding with any maintenance operation, review
local safety regulations. Read all warnings and recommend-
dations in Chapter 1.
Table 9-1 below summarizes the maintenance routines and their frequency. Each
routine is explained in detail in the Section indicated in the table.
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