Teledyne 3110 – Portable Trace/Percent Oxygen Analyzer, FM-approved configuration - Manual (Page 36)

Maintenance Model 3110
Teledyne Analytical Instruments 28
4.4 Battery Power Supply Service
The Model 3110 is designed to be intrinsically safe, and is designed
for use only when not connected to the AC power line. TAI suggests
that an overnight recharge be performed every few days for continuous
use.
The low battery LED will begin to blink and the display will flicker
when the batteries are getting low. At this point, the batteries should be
recharged. To recharge the batteries, turn the instrument OFF (see
Section 3.2.12. Remove the instrument to a safe non-hazardous location.
Note: Depending on the application, purging may be required
before disconnecting the analyzer and moving it to a safe
location.
Plug the AC charger into a suitable 100-240 VAC 50/60 Hz power
source. Plug the other end of the charger cable into the port on the rear
of the instrument. Figure 4-1 shows the AC charger port on the rear
panel.
Note: During charging, the green battery charging indicator LED
will illuminate.
When recharging is completed, unplug the unit from the AC outlet
and disconnect the cable from the AC charger port.
Note: The analyzer cannot be turned on while the AC charger is
attached.