Portable Power Module for Güralp Certimus
Operation
4
Operation
4.1
Hibernation mode
In normal use, the PPM's charge-control and monitoring circuitry consumes a small
amount of power. During shipping or storage, this would deplete the battery and,
potentially, shorten its life. To prevent this, the PPM has a hibernation mode (also
known as "sleep mode")..Almost no power is consumed during hibernation and no
power is provided to the output connector.
This section discusses :
•
waking the PPM from hibernation mode, which must be done before use; and
•
putting the PPM back into hibernation, which is strongly recommended
before shipping or storage, in order to prolong the battery life.
4.1.1 Waking the PPM from hibernation
The PPM will wake from hibernation when it senses a DC voltage on its charge input.
The voltage must be b1 V and +30 V and must be of the correct polarity
(although the unit itself is protected from reverse-polarity connections).
To wake the PPM, any suitable voltage source can be used, including a multimeter
set to "continuity test mode" or "diode test" mode. Note the polarity required.
Once woken, the Power Module’s internal charge control and monitoring circuitry
will start consuming a small amount of power. At this point, the battery voltage will
become available at the Power output connector, provided sufficient charge is
available in the internal cells.
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Issue A - May 2021
