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33784 V1.0
Yoyolog User Guide
www.grantinstruments.com
Page 9
4.1
Installing batteries
The logger’s power supply is provided by a 3.6V lithium battery.
The following list shows which battery shall be used for your logger:
- Lithium battery SL-550/S for 2YL-T14-4M/T14-E-4M and 2YL-RH24-4M/RH24-E-4M
- Lithium battery type SL-750/S for all other models
The logger offers internal battery monitoring.
YoyoView will indicate when the battery will require
replacing. In addition, the LED flashing periodically
indicates the need for the battery to be replaced (see
chapter 0, understanding LEDs for further infor-
mation).
To insert a battery into the datalogger, unscrew the
back cover of the logger then insert the battery keep-
ing the correct polarity.
When the battery has been fitted the LED on the front of the logger will start flashing in
red/green/blue after a few seconds to indicate it is operating.
Battery life
The battery life depends mainly on the logging inter-
val selected. The table gives an overview for typical
intervals.
yoyo-Logger
Interval
Battery life
>1 min
4 years
10 sec
230 days
1 sec
25 days
Some other factors reduce battery life- e.g., low temperatures decrease battery life. Down-
loading data or operation in MeterMode, Active start option enabled will also cause an in-
creased energy consumption, which further decreases battery life.