10 • Operation
NEW FOCUS, Inc.
Checking and Replacing the Battery
The Model 162X is powered by a single, standard 9-
volt battery. The battery lifetime depends on the load
resistor and on the optical input power to the photode-
tector. Under normal operating conditions the battery
lifetime will typically be greater than 500 hours.
To check the condition of the battery, push the red
switch to the
BATT CHK
position. If the green LED
lights up, the battery is in good condition.
When the battery voltage falls below about 6.5 volts,
the green LED will not light up, and the battery should
be replaced.
Replacing the Battery
1.
Turn the red power switch to “off” to prevent
damage to the receiver.
2.
Remove the screw on the back of the photode-
tector casing and remove the back cover.
3.
Unplug the old battery.
4.
Install a new 9-volt alkaline battery.
5.
Reinstall the back cover.
6.
Test the new battery’s status by pushing the
power switch to the
BATT CHK
position.
162x nanosec revB.fm Page 10 Friday, August 17, 2001 5:51 PM
