7
2.3
Use of the Rechargeable Battery
The OTDR uses an embedded Li-ion battery.
Precautions when using the OTDR
a) If the battery power is low when the OTDR is working, a low battery icon is displayed
on the LCD screen and the OTDR is automatically powered off.
b) The battery power may be low because the OTDR has not been used for a long time.
In such a case, if you attempt to power on the OTDR, the OTDR will be on for a few
seconds and then off to prevent excessive discharging of the battery. At this time,
you need to use the power adapter to charge the embedded battery immediately.
Charging the battery
a) Fast-charge the battery until the voltage reaches the preset value, and then trickle
charge the battery. The fast charging temperature of the battery ranges from 5
º
C to
45
º
C, whereas the trickle charging temperature ranges from 0
º
C to 55
º
C. The battery
is suitable for indoor use. When the charging temperature is out of the temperature
range, the battery cannot be fully charged or the battery may be damaged, which affects
the service life of the battery.
b) Fast-charge the battery for 3 hours.
c) DO NOT charge the battery for more than 8 hours.
2.4
Description of Function Keys
[Enter]
On the home page, press this key to implement the function corresponding to the
key. During the menu operation, press this key so that the current operation takes
effect.
Press [Enter] together with [Shift/ ] to switch between markers A and B.
[▲]
or
[▼]
Major functions of these keys are as following:
Move the menu bar up or down during the menu
operation.
Select an icon for operation.
Adjust parameter values during parameter
setup.
Press [
▲
] or [
▼
] together with [Shift/ ] to
zoom in or out the comparison traces
vertically.
[◄]
or
[►]
Major functions of these keys are as following:
Select the parameter to be modified during
parameter setup or menu operation.
Move the marker left or right during the trace
operation.
Page up or down the help information.
Press [
◄
] or [
►
] together with [Shift/ ] to zoom in or out the comparison traces
horizontally.
[ESC]
